internal/os/BatteryStatsImpl.java

/*
 * Copyright (C) 2006-2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.internal.os;

import android.annotation.Nullable;
import android.app.ActivityManager;
import android.bluetooth.BluetoothActivityEnergyInfo;
import android.bluetooth.UidTraffic;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkStats;
import android.net.wifi.WifiActivityEnergyInfo;
import android.net.wifi.WifiManager;
import android.os.BatteryManager;
import android.os.BatteryStats;
import android.os.Build;
import android.os.FileUtils;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.Parcel;
import android.os.ParcelFormatException;
import android.os.Parcelable;
import android.os.Process;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.WorkSource;
import android.telephony.DataConnectionRealTimeInfo;
import android.telephony.ModemActivityInfo;
import android.telephony.ServiceState;
import android.telephony.SignalStrength;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.Log;
import android.util.LogWriter;
import android.util.MutableInt;
import android.util.PrintWriterPrinter;
import android.util.Printer;
import android.util.Slog;
import android.util.SparseArray;
import android.util.SparseIntArray;
import android.util.SparseLongArray;
import android.util.TimeUtils;
import android.util.Xml;
import android.view.Display;

import com.android.internal.net.NetworkStatsFactory;
import com.android.internal.util.ArrayUtils;
import com.android.internal.util.FastPrintWriter;
import com.android.internal.util.FastXmlSerializer;
import com.android.internal.util.JournaledFile;
import com.android.internal.util.XmlUtils;
import com.android.server.NetworkManagementSocketTagger;
import libcore.util.EmptyArray;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.ReentrantLock;

/**
 * All information we are collecting about things that can happen that impact
 * battery life.  All times are represented in microseconds except where indicated
 * otherwise.
 */
public final class BatteryStatsImpl extends BatteryStats {
    private static final String TAG = "BatteryStatsImpl";
    private static final boolean DEBUG = false;
    public static final boolean DEBUG_ENERGY = false;
    private static final boolean DEBUG_ENERGY_CPU = DEBUG_ENERGY;
    private static final boolean DEBUG_HISTORY = false;
    private static final boolean USE_OLD_HISTORY = false;   // for debugging.

    // TODO: remove "tcp" from network methods, since we measure total stats.

    // In-memory Parcel magic number, used to detect attempts to unmarshall bad data
    private static final int MAGIC = 0xBA757475; // 'BATSTATS'

    // Current on-disk Parcel version
    private static final int VERSION = 141 + (USE_OLD_HISTORY ? 1000 : 0);

    // Maximum number of items we will record in the history.
    private static final int MAX_HISTORY_ITEMS = 2000;

    // No, really, THIS is the maximum number of items we will record in the history.
    private static final int MAX_MAX_HISTORY_ITEMS = 3000;

    // The maximum number of names wakelocks we will keep track of
    // per uid; once the limit is reached, we batch the remaining wakelocks
    // in to one common name.
    private static final int MAX_WAKELOCKS_PER_UID = 100;

    // Number of transmit power states the Wifi controller can be in.
    private static final int NUM_WIFI_TX_LEVELS = 1;

    // Number of transmit power states the Bluetooth controller can be in.
    private static final int NUM_BT_TX_LEVELS = 1;

    private final JournaledFile mFile;
    public final AtomicFile mCheckinFile;
    public final AtomicFile mDailyFile;

    static final int MSG_UPDATE_WAKELOCKS = 1;
    static final int MSG_REPORT_POWER_CHANGE = 2;
    static final int MSG_REPORT_CHARGING = 3;
    static final long DELAY_UPDATE_WAKELOCKS = 5*1000;

    private final KernelWakelockReader mKernelWakelockReader = new KernelWakelockReader();
    private final KernelWakelockStats mTmpWakelockStats = new KernelWakelockStats();

    private final KernelUidCpuTimeReader mKernelUidCpuTimeReader = new KernelUidCpuTimeReader();
    private KernelCpuSpeedReader[] mKernelCpuSpeedReaders;

    public interface BatteryCallback {
        public void batteryNeedsCpuUpdate();
        public void batteryPowerChanged(boolean onBattery);
        public void batterySendBroadcast(Intent intent);
    }

    final class MyHandler extends Handler {
        public MyHandler(Looper looper) {
            super(looper, null, true);
        }

        @Override
        public void handleMessage(Message msg) {
            BatteryCallback cb = mCallback;
            switch (msg.what) {
                case MSG_UPDATE_WAKELOCKS:
                    synchronized (BatteryStatsImpl.this) {
                        updateCpuTimeLocked();
                    }
                    if (cb != null) {
                        cb.batteryNeedsCpuUpdate();
                    }
                    break;
                case MSG_REPORT_POWER_CHANGE:
                    if (cb != null) {
                        cb.batteryPowerChanged(msg.arg1 != 0);
                    }
                    break;
                case MSG_REPORT_CHARGING:
                    if (cb != null) {
                        final String action;
                        synchronized (BatteryStatsImpl.this) {
                            action = mCharging ? BatteryManager.ACTION_CHARGING
                                    : BatteryManager.ACTION_DISCHARGING;
                        }
                        Intent intent = new Intent(action);
                        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
                        cb.batterySendBroadcast(intent);
                    }
                    break;
            }
        }
    }

    public interface ExternalStatsSync {
        public static final int UPDATE_CPU = 0x01;
        public static final int UPDATE_WIFI = 0x02;
        public static final int UPDATE_RADIO = 0x04;
        public static final int UPDATE_BT = 0x08;
        public static final int UPDATE_ALL = UPDATE_CPU | UPDATE_WIFI | UPDATE_RADIO | UPDATE_BT;

        void scheduleSync(String reason, int flags);
        void scheduleCpuSyncDueToRemovedUid(int uid);
    }

    public final MyHandler mHandler;
    private final ExternalStatsSync mExternalSync;

    private BatteryCallback mCallback;

    /**
     * Mapping isolated uids to the actual owning app uid.
     */
    final SparseIntArray mIsolatedUids = new SparseIntArray();

    /**
     * The statistics we have collected organized by uids.
     */
    final SparseArray<BatteryStatsImpl.Uid> mUidStats = new SparseArray<>();

    // A set of pools of currently active timers.  When a timer is queried, we will divide the
    // elapsed time by the number of active timers to arrive at that timer's share of the time.
    // In order to do this, we must refresh each timer whenever the number of active timers
    // changes.
    final ArrayList<StopwatchTimer> mPartialTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mFullTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mWindowTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mDrawTimers = new ArrayList<>();
    final SparseArray<ArrayList<StopwatchTimer>> mSensorTimers = new SparseArray<>();
    final ArrayList<StopwatchTimer> mWifiRunningTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mFullWifiLockTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mWifiMulticastTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mWifiScanTimers = new ArrayList<>();
    final SparseArray<ArrayList<StopwatchTimer>> mWifiBatchedScanTimers = new SparseArray<>();
    final ArrayList<StopwatchTimer> mAudioTurnedOnTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mVideoTurnedOnTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mFlashlightTurnedOnTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mCameraTurnedOnTimers = new ArrayList<>();
    final ArrayList<StopwatchTimer> mBluetoothScanOnTimers = new ArrayList<>();

    // Last partial timers we use for distributing CPU usage.
    final ArrayList<StopwatchTimer> mLastPartialTimers = new ArrayList<>();

    // These are the objects that will want to do something when the device
    // is unplugged from power.
    final TimeBase mOnBatteryTimeBase = new TimeBase();

    // These are the objects that will want to do something when the device
    // is unplugged from power *and* the screen is off.
    final TimeBase mOnBatteryScreenOffTimeBase = new TimeBase();

    // Set to true when we want to distribute CPU across wakelocks for the next
    // CPU update, even if we aren't currently running wake locks.
    boolean mDistributeWakelockCpu;

    boolean mShuttingDown;

    final HistoryEventTracker mActiveEvents = new HistoryEventTracker();

    long mHistoryBaseTime;
    boolean mHaveBatteryLevel = false;
    boolean mRecordingHistory = false;
    int mNumHistoryItems;

    static final int MAX_HISTORY_BUFFER = 256*1024; // 256KB
    static final int MAX_MAX_HISTORY_BUFFER = 320*1024; // 320KB
    final Parcel mHistoryBuffer = Parcel.obtain();
    final HistoryItem mHistoryLastWritten = new HistoryItem();
    final HistoryItem mHistoryLastLastWritten = new HistoryItem();
    final HistoryItem mHistoryReadTmp = new HistoryItem();
    final HistoryItem mHistoryAddTmp = new HistoryItem();
    final HashMap<HistoryTag, Integer> mHistoryTagPool = new HashMap<>();
    String[] mReadHistoryStrings;
    int[] mReadHistoryUids;
    int mReadHistoryChars;
    int mNextHistoryTagIdx = 0;
    int mNumHistoryTagChars = 0;
    int mHistoryBufferLastPos = -1;
    boolean mHistoryOverflow = false;
    int mActiveHistoryStates = 0xffffffff;
    int mActiveHistoryStates2 = 0xffffffff;
    long mLastHistoryElapsedRealtime = 0;
    long mTrackRunningHistoryElapsedRealtime = 0;
    long mTrackRunningHistoryUptime = 0;

    final HistoryItem mHistoryCur = new HistoryItem();

    HistoryItem mHistory;
    HistoryItem mHistoryEnd;
    HistoryItem mHistoryLastEnd;
    HistoryItem mHistoryCache;

    // Used by computeHistoryStepDetails
    HistoryStepDetails mLastHistoryStepDetails = null;
    byte mLastHistoryStepLevel = 0;
    final HistoryStepDetails mCurHistoryStepDetails = new HistoryStepDetails();
    final HistoryStepDetails mReadHistoryStepDetails = new HistoryStepDetails();
    final HistoryStepDetails mTmpHistoryStepDetails = new HistoryStepDetails();

    /**
     * Total time (in milliseconds) spent executing in user code.
     */
    long mLastStepCpuUserTime;
    long mCurStepCpuUserTime;
    /**
     * Total time (in milliseconds) spent executing in kernel code.
     */
    long mLastStepCpuSystemTime;
    long mCurStepCpuSystemTime;
    /**
     * Times from /proc/stat (but measured in milliseconds).
     */
    long mLastStepStatUserTime;
    long mLastStepStatSystemTime;
    long mLastStepStatIOWaitTime;
    long mLastStepStatIrqTime;
    long mLastStepStatSoftIrqTime;
    long mLastStepStatIdleTime;
    long mCurStepStatUserTime;
    long mCurStepStatSystemTime;
    long mCurStepStatIOWaitTime;
    long mCurStepStatIrqTime;
    long mCurStepStatSoftIrqTime;
    long mCurStepStatIdleTime;

    private HistoryItem mHistoryIterator;
    private boolean mReadOverflow;
    private boolean mIteratingHistory;

    int mStartCount;

    long mStartClockTime;
    String mStartPlatformVersion;
    String mEndPlatformVersion;

    long mUptime;
    long mUptimeStart;
    long mRealtime;
    long mRealtimeStart;

    int mWakeLockNesting;
    boolean mWakeLockImportant;
    public boolean mRecordAllHistory;
    boolean mNoAutoReset;

    int mScreenState = Display.STATE_UNKNOWN;
    StopwatchTimer mScreenOnTimer;

    int mScreenBrightnessBin = -1;
    final StopwatchTimer[] mScreenBrightnessTimer = new StopwatchTimer[NUM_SCREEN_BRIGHTNESS_BINS];

    boolean mInteractive;
    StopwatchTimer mInteractiveTimer;

    boolean mPowerSaveModeEnabled;
    StopwatchTimer mPowerSaveModeEnabledTimer;

    boolean mDeviceIdling;
    StopwatchTimer mDeviceIdlingTimer;

    boolean mDeviceLightIdling;
    StopwatchTimer mDeviceLightIdlingTimer;

    int mDeviceIdleMode;
    long mLastIdleTimeStart;
    long mLongestLightIdleTime;
    long mLongestFullIdleTime;
    StopwatchTimer mDeviceIdleModeLightTimer;
    StopwatchTimer mDeviceIdleModeFullTimer;

    boolean mPhoneOn;
    StopwatchTimer mPhoneOnTimer;

    int mAudioOnNesting;
    StopwatchTimer mAudioOnTimer;

    int mVideoOnNesting;
    StopwatchTimer mVideoOnTimer;

    int mFlashlightOnNesting;
    StopwatchTimer mFlashlightOnTimer;

    int mCameraOnNesting;
    StopwatchTimer mCameraOnTimer;

    int mPhoneSignalStrengthBin = -1;
    int mPhoneSignalStrengthBinRaw = -1;
    final StopwatchTimer[] mPhoneSignalStrengthsTimer =
            new StopwatchTimer[SignalStrength.NUM_SIGNAL_STRENGTH_BINS];

    StopwatchTimer mPhoneSignalScanningTimer;

    int mPhoneDataConnectionType = -1;
    final StopwatchTimer[] mPhoneDataConnectionsTimer =
            new StopwatchTimer[NUM_DATA_CONNECTION_TYPES];

    final LongSamplingCounter[] mNetworkByteActivityCounters =
            new LongSamplingCounter[NUM_NETWORK_ACTIVITY_TYPES];
    final LongSamplingCounter[] mNetworkPacketActivityCounters =
            new LongSamplingCounter[NUM_NETWORK_ACTIVITY_TYPES];

    /**
     * The WiFi controller activity (time in tx, rx, idle, and power consumed) for the device.
     */
    ControllerActivityCounterImpl mWifiActivity;

    /**
     * The Bluetooth controller activity (time in tx, rx, idle, and power consumed) for the device.
     */
    ControllerActivityCounterImpl mBluetoothActivity;

    /**
     * The Modem controller activity (time in tx, rx, idle, and power consumed) for the device.
     */
    ControllerActivityCounterImpl mModemActivity;

    /**
     * Whether the device supports WiFi controller energy reporting. This is set to true on
     * the first WiFi energy report. See {@link #mWifiActivity}.
     */
    boolean mHasWifiReporting = false;

    /**
     * Whether the device supports Bluetooth controller energy reporting. This is set to true on
     * the first Bluetooth energy report. See {@link #mBluetoothActivity}.
     */
    boolean mHasBluetoothReporting = false;

    /**
     * Whether the device supports Modem controller energy reporting. This is set to true on
     * the first Modem energy report. See {@link #mModemActivity}.
     */
    boolean mHasModemReporting = false;

    boolean mWifiOn;
    StopwatchTimer mWifiOnTimer;

    boolean mGlobalWifiRunning;
    StopwatchTimer mGlobalWifiRunningTimer;

    int mWifiState = -1;
    final StopwatchTimer[] mWifiStateTimer = new StopwatchTimer[NUM_WIFI_STATES];

    int mWifiSupplState = -1;
    final StopwatchTimer[] mWifiSupplStateTimer = new StopwatchTimer[NUM_WIFI_SUPPL_STATES];

    int mWifiSignalStrengthBin = -1;
    final StopwatchTimer[] mWifiSignalStrengthsTimer =
            new StopwatchTimer[NUM_WIFI_SIGNAL_STRENGTH_BINS];

    int mBluetoothScanNesting;
    StopwatchTimer mBluetoothScanTimer;

    int mMobileRadioPowerState = DataConnectionRealTimeInfo.DC_POWER_STATE_LOW;
    long mMobileRadioActiveStartTime;
    StopwatchTimer mMobileRadioActiveTimer;
    StopwatchTimer mMobileRadioActivePerAppTimer;
    LongSamplingCounter mMobileRadioActiveAdjustedTime;
    LongSamplingCounter mMobileRadioActiveUnknownTime;
    LongSamplingCounter mMobileRadioActiveUnknownCount;

    int mWifiRadioPowerState = DataConnectionRealTimeInfo.DC_POWER_STATE_LOW;

    /**
     * These provide time bases that discount the time the device is plugged
     * in to power.
     */
    boolean mOnBattery;
    boolean mOnBatteryInternal;

    /**
     * External reporting of whether the device is actually charging.
     */
    boolean mCharging = true;
    int mLastChargingStateLevel;

    /*
     * These keep track of battery levels (1-100) at the last plug event and the last unplug event.
     */
    int mDischargeStartLevel;
    int mDischargeUnplugLevel;
    int mDischargePlugLevel;
    int mDischargeCurrentLevel;
    int mCurrentBatteryLevel;
    int mLowDischargeAmountSinceCharge;
    int mHighDischargeAmountSinceCharge;
    int mDischargeScreenOnUnplugLevel;
    int mDischargeScreenOffUnplugLevel;
    int mDischargeAmountScreenOn;
    int mDischargeAmountScreenOnSinceCharge;
    int mDischargeAmountScreenOff;
    int mDischargeAmountScreenOffSinceCharge;

    static final int MAX_LEVEL_STEPS = 200;

    int mInitStepMode = 0;
    int mCurStepMode = 0;
    int mModStepMode = 0;

    int mLastDischargeStepLevel;
    int mMinDischargeStepLevel;
    final LevelStepTracker mDischargeStepTracker = new LevelStepTracker(MAX_LEVEL_STEPS);
    final LevelStepTracker mDailyDischargeStepTracker = new LevelStepTracker(MAX_LEVEL_STEPS*2);
    ArrayList<PackageChange> mDailyPackageChanges;

    int mLastChargeStepLevel;
    int mMaxChargeStepLevel;
    final LevelStepTracker mChargeStepTracker = new LevelStepTracker(MAX_LEVEL_STEPS);
    final LevelStepTracker mDailyChargeStepTracker = new LevelStepTracker(MAX_LEVEL_STEPS*2);

    static final int MAX_DAILY_ITEMS = 10;

    long mDailyStartTime = 0;
    long mNextMinDailyDeadline = 0;
    long mNextMaxDailyDeadline = 0;

    final ArrayList<DailyItem> mDailyItems = new ArrayList<>();

    long mLastWriteTime = 0; // Milliseconds

    private int mPhoneServiceState = -1;
    private int mPhoneServiceStateRaw = -1;
    private int mPhoneSimStateRaw = -1;

    private int mNumConnectivityChange;
    private int mLoadedNumConnectivityChange;
    private int mUnpluggedNumConnectivityChange;

    private final NetworkStats.Entry mTmpNetworkStatsEntry = new NetworkStats.Entry();

    private PowerProfile mPowerProfile;

    /*
     * Holds a SamplingTimer associated with each kernel wakelock name being tracked.
     */
    private final HashMap<String, SamplingTimer> mKernelWakelockStats = new HashMap<>();

    public Map<String, ? extends Timer> getKernelWakelockStats() {
        return mKernelWakelockStats;
    }

    String mLastWakeupReason = null;
    long mLastWakeupUptimeMs = 0;
    private final HashMap<String, SamplingTimer> mWakeupReasonStats = new HashMap<>();

    public Map<String, ? extends Timer> getWakeupReasonStats() {
        return mWakeupReasonStats;
    }

    public BatteryStatsImpl() {
        mFile = null;
        mCheckinFile = null;
        mDailyFile = null;
        mHandler = null;
        mExternalSync = null;
        clearHistoryLocked();
    }

    public static interface TimeBaseObs {
        void onTimeStarted(long elapsedRealtime, long baseUptime, long baseRealtime);
        void onTimeStopped(long elapsedRealtime, long baseUptime, long baseRealtime);
    }

    static class TimeBase {
        private final ArrayList<TimeBaseObs> mObservers = new ArrayList<>();

        private long mUptime;
        private long mRealtime;

        private boolean mRunning;

        private long mPastUptime;
        private long mUptimeStart;
        private long mPastRealtime;
        private long mRealtimeStart;
        private long mUnpluggedUptime;
        private long mUnpluggedRealtime;

        public void dump(PrintWriter pw, String prefix) {
            StringBuilder sb = new StringBuilder(128);
            pw.print(prefix); pw.print("mRunning="); pw.println(mRunning);
            sb.setLength(0);
            sb.append(prefix);
                    sb.append("mUptime=");
                    formatTimeMs(sb, mUptime / 1000);
            pw.println(sb.toString());
            sb.setLength(0);
            sb.append(prefix);
                    sb.append("mRealtime=");
                    formatTimeMs(sb, mRealtime / 1000);
            pw.println(sb.toString());
            sb.setLength(0);
            sb.append(prefix);
                    sb.append("mPastUptime=");
                    formatTimeMs(sb, mPastUptime / 1000); sb.append("mUptimeStart=");
                    formatTimeMs(sb, mUptimeStart / 1000);
                    sb.append("mUnpluggedUptime="); formatTimeMs(sb, mUnpluggedUptime / 1000);
            pw.println(sb.toString());
            sb.setLength(0);
            sb.append(prefix);
                    sb.append("mPastRealtime=");
                    formatTimeMs(sb, mPastRealtime / 1000); sb.append("mRealtimeStart=");
                    formatTimeMs(sb, mRealtimeStart / 1000);
                    sb.append("mUnpluggedRealtime="); formatTimeMs(sb, mUnpluggedRealtime / 1000);
            pw.println(sb.toString());
        }

        public void add(TimeBaseObs observer) {
            mObservers.add(observer);
        }

        public void remove(TimeBaseObs observer) {
            if (!mObservers.remove(observer)) {
                Slog.wtf(TAG, "Removed unknown observer: " + observer);
            }
        }

        public void init(long uptime, long realtime) {
            mRealtime = 0;
            mUptime = 0;
            mPastUptime = 0;
            mPastRealtime = 0;
            mUptimeStart = uptime;
            mRealtimeStart = realtime;
            mUnpluggedUptime = getUptime(mUptimeStart);
            mUnpluggedRealtime = getRealtime(mRealtimeStart);
        }

        public void reset(long uptime, long realtime) {
            if (!mRunning) {
                mPastUptime = 0;
                mPastRealtime = 0;
            } else {
                mUptimeStart = uptime;
                mRealtimeStart = realtime;
                mUnpluggedUptime = getUptime(uptime);
                mUnpluggedRealtime = getRealtime(realtime);
            }
        }

        public long computeUptime(long curTime, int which) {
            switch (which) {
                case STATS_SINCE_CHARGED:
                    return mUptime + getUptime(curTime);
                case STATS_CURRENT:
                    return getUptime(curTime);
                case STATS_SINCE_UNPLUGGED:
                    return getUptime(curTime) - mUnpluggedUptime;
            }
            return 0;
        }

        public long computeRealtime(long curTime, int which) {
            switch (which) {
                case STATS_SINCE_CHARGED:
                    return mRealtime + getRealtime(curTime);
                case STATS_CURRENT:
                    return getRealtime(curTime);
                case STATS_SINCE_UNPLUGGED:
                    return getRealtime(curTime) - mUnpluggedRealtime;
            }
            return 0;
        }

        public long getUptime(long curTime) {
            long time = mPastUptime;
            if (mRunning) {
                time += curTime - mUptimeStart;
            }
            return time;
        }

        public long getRealtime(long curTime) {
            long time = mPastRealtime;
            if (mRunning) {
                time += curTime - mRealtimeStart;
            }
            return time;
        }

        public long getUptimeStart() {
            return mUptimeStart;
        }

        public long getRealtimeStart() {
            return mRealtimeStart;
        }

        public boolean isRunning() {
            return mRunning;
        }

        public boolean setRunning(boolean running, long uptime, long realtime) {
            if (mRunning != running) {
                mRunning = running;
                if (running) {
                    mUptimeStart = uptime;
                    mRealtimeStart = realtime;
                    long batteryUptime = mUnpluggedUptime = getUptime(uptime);
                    long batteryRealtime = mUnpluggedRealtime = getRealtime(realtime);

                    for (int i = mObservers.size() - 1; i >= 0; i--) {
                        mObservers.get(i).onTimeStarted(realtime, batteryUptime, batteryRealtime);
                    }
                } else {
                    mPastUptime += uptime - mUptimeStart;
                    mPastRealtime += realtime - mRealtimeStart;

                    long batteryUptime = getUptime(uptime);
                    long batteryRealtime = getRealtime(realtime);

                    for (int i = mObservers.size() - 1; i >= 0; i--) {
                        mObservers.get(i).onTimeStopped(realtime, batteryUptime, batteryRealtime);
                    }
                }
                return true;
            }
            return false;
        }

        public void readSummaryFromParcel(Parcel in) {
            mUptime = in.readLong();
            mRealtime = in.readLong();
        }

        public void writeSummaryToParcel(Parcel out, long uptime, long realtime) {
            out.writeLong(computeUptime(uptime, STATS_SINCE_CHARGED));
            out.writeLong(computeRealtime(realtime, STATS_SINCE_CHARGED));
        }

        public void readFromParcel(Parcel in) {
            mRunning = false;
            mUptime = in.readLong();
            mPastUptime = in.readLong();
            mUptimeStart = in.readLong();
            mRealtime = in.readLong();
            mPastRealtime = in.readLong();
            mRealtimeStart = in.readLong();
            mUnpluggedUptime = in.readLong();
            mUnpluggedRealtime = in.readLong();
        }

        public void writeToParcel(Parcel out, long uptime, long realtime) {
            final long runningUptime = getUptime(uptime);
            final long runningRealtime = getRealtime(realtime);
            out.writeLong(mUptime);
            out.writeLong(runningUptime);
            out.writeLong(mUptimeStart);
            out.writeLong(mRealtime);
            out.writeLong(runningRealtime);
            out.writeLong(mRealtimeStart);
            out.writeLong(mUnpluggedUptime);
            out.writeLong(mUnpluggedRealtime);
        }
    }

    /**
     * State for keeping track of counting information.
     */
    public static class Counter extends BatteryStats.Counter implements TimeBaseObs {
        final AtomicInteger mCount = new AtomicInteger();
        final TimeBase mTimeBase;
        int mLoadedCount;
        int mLastCount;
        int mUnpluggedCount;
        int mPluggedCount;

        Counter(TimeBase timeBase, Parcel in) {
            mTimeBase = timeBase;
            mPluggedCount = in.readInt();
            mCount.set(mPluggedCount);
            mLoadedCount = in.readInt();
            mLastCount = 0;
            mUnpluggedCount = in.readInt();
            timeBase.add(this);
        }

        Counter(TimeBase timeBase) {
            mTimeBase = timeBase;
            timeBase.add(this);
        }

        public void writeToParcel(Parcel out) {
            out.writeInt(mCount.get());
            out.writeInt(mLoadedCount);
            out.writeInt(mUnpluggedCount);
        }

        public void onTimeStarted(long elapsedRealtime, long baseUptime, long baseRealtime) {
            mUnpluggedCount = mPluggedCount;
            mCount.set(mPluggedCount);
        }

        public void onTimeStopped(long elapsedRealtime, long baseUptime, long baseRealtime) {
            mPluggedCount = mCount.get();
        }

        /**
         * Writes a possibly null Counter to a Parcel.
         *
         * @param out the Parcel to be written to.
         * @param counter a Counter, or null.
         */
        public static void writeCounterToParcel(Parcel out, Counter counter) {
            if (counter == null) {
                out.writeInt(0); // indicates null
                return;
            }
            out.writeInt(1); // indicates non-null

            counter.writeToParcel(out);
        }

        @Override
        public int getCountLocked(int which) {
            int val = mCount.get();
            if (which == STATS_SINCE_UNPLUGGED) {
                val -= mUnpluggedCount;
            } else if (which != STATS_SINCE_CHARGED) {
                val -= mLoadedCount;
            }

            return val;
        }

        public void logState(Printer pw, String prefix) {
            pw.println(prefix + "mCount=" + mCount.get()
                    + " mLoadedCount=" + mLoadedCount + " mLastCount=" + mLastCount
                    + " mUnpluggedCount=" + mUnpluggedCount
                    + " mPluggedCount=" + mPluggedCount);
        }

        void stepAtomic() {
            mCount.incrementAndGet();
        }

        /**
         * Clear state of this counter.
         */
        void reset(boolean detachIfReset) {
            mCount.set(0);
            mLoadedCount = mLastCount = mPluggedCount = mUnpluggedCount = 0;
            if (detachIfReset) {
                detach();
            }
        }

        void detach() {
            mTimeBase.remove(this);
        }

        void writeSummaryFromParcelLocked(Parcel out) {
            int count = mCount.get();
            out.writeInt(count);
        }

        void readSummaryFromParcelLocked(Parcel in) {
            mLoadedCount = in.readInt();
            mCount.set(mLoadedCount);
            mLastCount = 0;
            mUnpluggedCount = mPluggedCount = mLoadedCount;
        }
    }

    public static class LongSamplingCounter extends LongCounter implements TimeBaseObs {
        final TimeBase mTimeBase;
        long mCount;
        long mLoadedCount;
        long mLastCount;
        long mUnpluggedCount;
        long mPluggedCount;

        LongSamplingCounter(TimeBase timeBase, Parcel in) {
            mTimeBase = timeBase;
            mPluggedCount = in.readLong();
            mCount = mPluggedCount;
            mLoadedCount = in.readLong();
            mLastCount = 0;
            mUnpluggedCount = in.readLong();
            timeBase.add(this);
        }

        LongSamplingCounter(TimeBase timeBase) {
            mTimeBase = timeBase;
            timeBase.add(this);
        }

        public void writeToParcel(Parcel out) {
            out.writeLong(mCount);
            out.writeLong(mLoadedCount);
            out.writeLong(mUnpluggedCount);
        }

        @Override
        public void onTimeStarted(long elapsedRealtime, long baseUptime, long baseRealtime) {
            mUnpluggedCount = mPluggedCount;
            mCount = mPluggedCount;
        }

        @Override
        public void onTimeStopped(long elapsedRealtime, long baseUptime, long baseRealtime) {
            mPluggedCount = mCount;
        }

        public long getCountLocked(int which) {
            long val = mCount;
            if (which == STATS_SINCE_UNPLUGGED) {
                val -= mUnpluggedCount;
            } else if (which != STATS_SINCE_CHARGED) {
                val -= mLoadedCount;
            }

            return val;
        }

        @Override
        public void logState(Printer pw, String prefix) {
            pw.println(prefix + "mCount=" + mCount
                    + " mLoadedCount=" + mLoadedCount + " mLastCount=" + mLastCount
                    + " mUnpluggedCount=" + mUnpluggedCount
                    + " mPluggedCount=" + mPluggedCount);
        }

        void addCountLocked(long count) {
            mCount += count;
        }

        /**
         * Clear state of this counter.
         */
        void reset(boolean detachIfReset) {
            mCount = 0;
            mLoadedCount = mLastCount = mPluggedCount = mUnpluggedCount = 0;
            if (detachIfReset) {
                detach();
            }
        }

        void detach() {
            mTimeBase.remove(this);
        }

        void writeSummaryFromParcelLocked(Parcel out) {
            out.writeLong(mCount);
        }

        void readSummaryFromParcelLocked(Parcel in) {
            mLoadedCount = in.readLong();
            mCount = mLoadedCount;
            mLastCount = 0;
            mUnpluggedCount = mPluggedCount = mLoadedCount;
        }
    }

    /**
     * State for keeping track of timing information.
     */
    public static abstract class Timer extends BatteryStats.Timer implements TimeBaseObs {
        final int mType;
        final TimeBase mTimeBase;

        int mCount;
        int mLoadedCount;
        int mLastCount;
        int mUnpluggedCount;

        // Times are in microseconds for better accuracy when dividing by the
        // lock count, and are in "battery realtime" units.

        /**
         * The total time we have accumulated since the start of the original
         * boot, to the last time something interesting happened in the
         * current run.
         */
        long mTotalTime;

        /**
         * The total time we loaded for the previous runs.  Subtract this from
         * mTotalTime to find the time for the current run of the system.
         */
        long mLoadedTime;

        /**
         * The run time of the last run of the system, as loaded from the
         * saved data.
         */
        long mLastTime;

        /**
         * The value of mTotalTime when unplug() was last called.  Subtract
         * this from mTotalTime to find the time since the last unplug from
         * power.
         */
        long mUnpluggedTime;

        /**
         * The total time this timer has been running until the latest mark has been set.
         * Subtract this from mTotalTime to get the time spent running since the mark was set.
         */
        long mTimeBeforeMark;

        /**
         * Constructs from a parcel.
         * @param type
         * @param timeBase
         * @param in
         */
        Timer(int type, TimeBase timeBase, Parcel in) {
            mType = type;
            mTimeBase = timeBase;

            mCount = in.readInt();
            mLoadedCount = in.readInt();
            mLastCount = 0;
            mUnpluggedCount = in.readInt();
            mTotalTime = in.readLong();
            mLoadedTime = in.readLong();
            mLastTime = 0;
            mUnpluggedTime = in.readLong();
            mTimeBeforeMark = in.readLong();
            timeBase.add(this);
            if (DEBUG) Log.i(TAG, "**** READ TIMER #" + mType + ": mTotalTime=" + mTotalTime);
        }

        Timer(int type, TimeBase timeBase) {
            mType = type;
            mTimeBase = timeBase;
            timeBase.add(this);
        }

        protected abstract long computeRunTimeLocked(long curBatteryRealtime);

        protected abstract int computeCurrentCountLocked();

        /**
         * Clear state of this timer.  Returns true if the timer is inactive
         * so can be completely dropped.
         */
        boolean reset(boolean detachIfReset) {
            mTotalTime = mLoadedTime = mLastTime = mTimeBeforeMark = 0;
            mCount = mLoadedCount = mLastCount = 0;
            if (detachIfReset) {
                detach();
            }
            return true;
        }

        void detach() {
            mTimeBase.remove(this);
        }

        public void writeToParcel(Parcel out, long elapsedRealtimeUs) {
            if (DEBUG) Log.i(TAG, "**** WRITING TIMER #" + mType + ": mTotalTime="
                    + computeRunTimeLocked(mTimeBase.getRealtime(elapsedRealtimeUs)));
            out.writeInt(mCount);
            out.writeInt(mLoadedCount);
            out.writeInt(mUnpluggedCount);
            out.writeLong(computeRunTimeLocked(mTimeBase.getRealtime(elapsedRealtimeUs)));
            out.writeLong(mLoadedTime);
            out.writeLong(mUnpluggedTime);
            out.writeLong(mTimeBeforeMark);
        }

        @Override
        public void onTimeStarted(long elapsedRealtime, long timeBaseUptime, long baseRealtime) {
            if (DEBUG && mType < 0) {
                Log.v(TAG, "unplug #" + mType + ": realtime=" + baseRealtime
                        + " old mUnpluggedTime=" + mUnpluggedTime
                        + " old mUnpluggedCount=" + mUnpluggedCount);
            }
            mUnpluggedTime = computeRunTimeLocked(baseRealtime);
            mUnpluggedCount = mCount;
            if (DEBUG && mType < 0) {
                Log.v(TAG, "unplug #" + mType
                        + ": new mUnpluggedTime=" + mUnpluggedTime
                        + " new mUnpluggedCount=" + mUnpluggedCount);
            }
        }

        @Override
        public void onTimeStopped(long elapsedRealtime, long baseUptime, long baseRealtime) {
            if (DEBUG && mType < 0) {
                Log.v(TAG, "plug #" + mType + ": realtime=" + baseRealtime
                        + " old mTotalTime=" + mTotalTime);
            }
            mTotalTime = computeRunTimeLocked(baseRealtime);
            mCount = computeCurrentCountLocked();
            if (DEBUG && mType < 0) {
                Log.v(TAG, "plug #" + mType
                        + ": new mTotalTime=" + mTotalTime);
            }
        }

        /**
         * Writes a possibly null Timer to a Parcel.
         *
         * @param out the Parcel to be written to.
         * @param timer a Timer, or null.
         */
        public static void writeTimerToParcel(Parcel out, Timer timer, long elapsedRealtimeUs) {
            if (timer == null) {
                out.writeInt(0); // indicates null
                return;
            }
            out.writeInt(1); // indicates non-null

            timer.writeToParcel(out, elapsedRealtimeUs);
        }

        @Override
        public long getTotalTimeLocked(long elapsedRealtimeUs, int which) {
            long val = computeRunTimeLocked(mTimeBase.getRealtime(elapsedRealtimeUs));
            if (which == STATS_SINCE_UNPLUGGED) {
                val -= mUnpluggedTime;
            } else if (which != STATS_SINCE_CHARGED) {
                val -= mLoadedTime;
            }

            return val;
        }

        @Override
        public int getCountLocked(int which) {
            int val = computeCurrentCountLocked();
            if (which == STATS_SINCE_UNPLUGGED) {
                val -= mUnpluggedCount;
            } else if (which != STATS_SINCE_CHARGED) {
                val -= mLoadedCount;
            }

            return val;
        }

        @Override
        public long getTimeSinceMarkLocked(long elapsedRealtimeUs) {
            long val = computeRunTimeLocked(mTimeBase.getRealtime(elapsedRealtimeUs));
            return val - mTimeBeforeMark;
        }

        @Override
        public void logState(Printer pw, String prefix) {
            pw.println(prefix + "mCount=" + mCount
                    + " mLoadedCount=" + mLoadedCount + " mLastCount=" + mLastCount
                    + " mUnpluggedCount=" + mUnpluggedCount);
            pw.println(prefix + "mTotalTime=" + mTotalTime
                    + " mLoadedTime=" + mLoadedTime);
            pw.println(prefix + "mLastTime=" + mLastTime
                    + " mUnpluggedTime=" + mUnpluggedTime);
        }


        void writeSummaryFromParcelLocked(Parcel out, long elapsedRealtimeUs) {
            long runTime = computeRunTimeLocked(mTimeBase.getRealtime(elapsedRealtimeUs));
            out.writeLong(runTime);
            out.writeInt(mCount);
        }

        void readSummaryFromParcelLocked(Parcel in) {
            // Multiply by 1000 for backwards compatibility
            mTotalTime = mLoadedTime = in.readLong();
            mLastTime = 0;
            mUnpluggedTime = mTotalTime;
            mCount = mLoadedCount = in.readInt();
            mLastCount = 0;
            mUnpluggedCount = mCount;

            // When reading the summary, we set the mark to be the latest information.
            mTimeBeforeMark = mTotalTime;
        }
    }

    public static final class SamplingTimer extends Timer {

        /**
         * The most recent reported count from /proc/wakelocks.
         */
        int mCurrentReportedCount;

        /**
         * The reported count from /proc/wakelocks when unplug() was last
         * called.
         */
        int mUnpluggedReportedCount;

        /**
         * The most recent reported total_time from /proc/wakelocks.
         */
        long mCurrentReportedTotalTime;


        /**
         * The reported total_time from /proc/wakelocks when unplug() was last
         * called.
         */
        long mUnpluggedReportedTotalTime;

        /**
         * Whether we are currently in a discharge cycle.
         */
        boolean mTimeBaseRunning;

        /**
         * Whether we are currently recording reported values.
         */
        boolean mTrackingReportedValues;

        /*
         * A sequence counter, incremented once for each update of the stats.
         */
        int mUpdateVersion;

        SamplingTimer(TimeBase timeBase, Parcel in) {
            super(0, timeBase, in);
            mCurrentReportedCount = in.readInt();
            mUnpluggedReportedCount = in.readInt();
            mCurrentReportedTotalTime = in.readLong();
            mUnpluggedReportedTotalTime = in.readLong();
            mTrackingReportedValues = in.readInt() == 1;
            mTimeBaseRunning = timeBase.isRunning();
        }

        SamplingTimer(TimeBase timeBase, boolean trackReportedValues) {
            super(0, timeBase);
            mTrackingReportedValues = trackReportedValues;
            mTimeBaseRunning = timeBase.isRunning();
        }

        public void setStale() {
            mTrackingReportedValues = false;
            mUnpluggedReportedTotalTime = 0;
            mUnpluggedReportedCount = 0;
        }

        public void setUpdateVersion(int version) {
            mUpdateVersion = version;
        }

        public int getUpdateVersion() {
            return mUpdateVersion;
        }

        public void updateCurrentReportedCount(int count) {
            if (mTimeBaseRunning && mUnpluggedReportedCount == 0) {
                // Updating the reported value for the first time.
                mUnpluggedReportedCount = count;
                // If we are receiving an update update mTrackingReportedValues;
                mTrackingReportedValues = true;
            }
            mCurrentReportedCount = count;
        }

        public void addCurrentReportedCount(int delta) {
            updateCurrentReportedCount(mCurrentReportedCount + delta);
        }

        public void updateCurrentReportedTotalTime(long totalTime) {
            if (mTimeBaseRunning && mUnpluggedReportedTotalTime == 0) {
                // Updating the reported value for the first time.
                mUnpluggedReportedTotalTime = totalTime;
                // If we are receiving an update update mTrackingReportedValues;
                mTrackingReportedValues = true;
            }
            mCurrentReportedTotalTime = totalTime;
        }

        public void addCurrentReportedTotalTime(long delta) {
            updateCurrentReportedTotalTime(mCurrentReportedTotalTime + delta);
        }

        public void onTimeStarted(long elapsedRealtime, long baseUptime, long baseRealtime) {
            super.onTimeStarted(elapsedRealtime, baseUptime, baseRealtime);
            if (mTrackingReportedValues) {
                mUnpluggedReportedTotalTime = mCurrentReportedTotalTime;
                mUnpluggedReportedCount = mCurrentReportedCount;
            }
            mTimeBaseRunning = true;
        }

        public void onTimeStopped(long elapsedRealtime, long baseUptime, long baseRealtime) {
            super.onTimeStopped(elapsedRealtime, baseUptime, baseRealtime);
            mTimeBaseRunning = false;
        }

        public void logState(Printer pw, String prefix) {
            super.logState(pw, prefix);
            pw.println(prefix + "mCurrentReportedCount=" + mCurrentReportedCount
                    + " mUnpluggedReportedCount=" + mUnpluggedReportedCount
                    + " mCurrentReportedTotalTime=" + mCurrentReportedTotalTime
                    + " mUnpluggedReportedTotalTime=" + mUnpluggedReportedTotalTime);
        }

        protected long computeRunTimeLocked(long curBatteryRealtime) {
            return mTotalTime + (mTimeBaseRunning && mTrackingReportedValues
                    ? mCurrentReportedTotalTime - mUnpluggedReportedTotalTime : 0);
        }

        protected int computeCurrentCountLocked() {
            return mCount + (mTimeBaseRunning && mTrackingReportedValues
                    ? mCurrentReportedCount - mUnpluggedReportedCount : 0);
        }

        public void writeToParcel(Parcel out, long elapsedRealtimeUs) {
            super.writeToParcel(out, elapsedRealtimeUs);
            out.writeInt(mCurrentReportedCount);
            out.writeInt(mUnpluggedReportedCount);
            out.writeLong(mCurrentReportedTotalTime);
            out.writeLong(mUnpluggedReportedTotalTime);
            out.writeInt(mTrackingReportedValues ? 1 : 0);
        }

        boolean reset(boolean detachIfReset) {
            super.reset(detachIfReset);
            setStale();
            return true;
        }

        void writeSummaryFromParcelLocked(Parcel out, long batteryRealtime) {
            super.writeSummaryFromParcelLocked(out, batteryRealtime);
            out.writeLong(mCurrentReportedTotalTime);
            out.writeInt(mCurrentReportedCount);
            out.writeInt(mTrackingReportedValues ? 1 : 0);
        }

        void readSummaryFromParcelLocked(Parcel in) {
            super.readSummaryFromParcelLocked(in);
            mUnpluggedReportedTotalTime = mCurrentReportedTotalTime = in.readLong();
            mUnpluggedReportedCount = mCurrentReportedCount = in.readInt();
            mTrackingReportedValues = in.readInt() == 1;
        }
    }

    /**
     * A timer that increments in batches.  It does not run for durations, but just jumps
     * for a pre-determined amount.
     */
    public static final class BatchTimer extends Timer {
        final Uid mUid;

        /**
         * The last time at which we updated the timer.  This is in elapsed realtime microseconds.
         */
        long mLastAddedTime;

        /**
         * The last duration that we added to the timer.  This is in microseconds.
         */
        long mLastAddedDuration;

        /**
         * Whether we are currently in a discharge cycle.
         */
        boolean mInDischarge;

        BatchTimer(Uid uid, int type, TimeBase timeBase, Parcel in) {
            super(type, timeBase, in);
            mUid = uid;
            mLastAddedTime = in.readLong();
            mLastAddedDuration = in.readLong();
            mInDischarge = timeBase.isRunning();
        }

        BatchTimer(Uid uid, int type, TimeBase timeBase) {
            super(type, timeBase);
            mUid = uid;
            mInDischarge = timeBase.isRunning();
        }

        @Override
        public void writeToParcel(Parcel out, long elapsedRealtimeUs) {
            super.writeToParcel(out, elapsedRealtimeUs);
            out.writeLong(mLastAddedTime);
            out.writeLong(mLastAddedDuration);
        }

        @Override
        public void onTimeStopped(long elapsedRealtime, long baseUptime, long baseRealtime) {
            recomputeLastDuration(SystemClock.elapsedRealtime() * 1000, false);
            mInDischarge = false;
            super.onTimeStopped(elapsedRealtime, baseUptime, baseRealtime);
        }

        @Override
        public void onTimeStarted(long elapsedRealtime, long baseUptime, long baseRealtime) {
            recomputeLastDuration(elapsedRealtime, false);
            mInDischarge = true;
            // If we are still within the last added duration, then re-added whatever remains.
            if (mLastAddedTime == elapsedRealtime) {
                mTotalTime += mLastAddedDuration;
            }
            super.onTimeStarted(elapsedRealtime, baseUptime, baseRealtime);
        }

        @Override
        public void logState(Printer pw, String prefix) {
            super.logState(pw, prefix);
            pw.println(prefix + "mLastAddedTime=" + mLastAddedTime
                    + " mLastAddedDuration=" + mLastAddedDuration);
        }

        private long computeOverage(long curTime) {
            if (mLastAddedTime > 0) {
                return mLastTime + mLastAddedDuration - curTime;
            }
            return 0;
        }

        private void recomputeLastDuration(long curTime, boolean abort) {
            final long overage = computeOverage(curTime);
            if (overage > 0) {
                // Aborting before the duration ran out -- roll back the remaining
                // duration.  Only do this if currently discharging; otherwise we didn't
                // actually add the time.
                if (mInDischarge) {
                    mTotalTime -= overage;
                }
                if (abort) {
                    mLastAddedTime = 0;
                } else {
                    mLastAddedTime = curTime;
                    mLastAddedDuration -= overage;
                }
            }
        }

        public void addDuration(BatteryStatsImpl stats, long durationMillis) {
            final long now = SystemClock.elapsedRealtime() * 1000;
            recomputeLastDuration(now, true);
            mLastAddedTime = now;
            mLastAddedDuration = durationMillis * 1000;
            if (mInDischarge) {
                mTotalTime += mLastAddedDuration;
                mCount++;
            }
        }

        public void abortLastDuration(BatteryStatsImpl stats) {
            final long now = SystemClock.elapsedRealtime() * 1000;
            recomputeLastDuration(now, true);
        }

        @Override
        protected int computeCurrentCountLocked() {
            return mCount;
        }

        @Override
        protected long computeRunTimeLocked(long curBatteryRealtime) {
            final long overage = computeOverage(SystemClock.elapsedRealtime() * 1000);
            if (overage > 0) {
                return mTotalTime = overage;
            }
            return mTotalTime;
        }

        @Override
        boolean reset(boolean detachIfReset) {
            final long now = SystemClock.elapsedRealtime() * 1000;
            recomputeLastDuration(now, true);
            boolean stillActive = mLastAddedTime == now;
            super.reset(!stillActive && detachIfReset);
            return !stillActive;
        }
    }

    /**
     * State for keeping track of timing information.
     */
    public static final class StopwatchTimer extends Timer {
        final Uid mUid;
        final ArrayList<StopwatchTimer> mTimerPool;

        int mNesting;

        /**
         * The last time at which we updated the timer.  If mNesting is > 0,
         * subtract this from the current battery time to find the amount of
         * time we have been running since we last computed an update.
         */
        long mUpdateTime;

        /**
         * The total time at which the timer was acquired, to determine if it
         * was actually held for an interesting duration.
         */
        long mAcquireTime;

        long mTimeout;

        /**
         * For partial wake locks, keep track of whether we are in the list
         * to consume CPU cycles.
         */
        boolean mInList;

        StopwatchTimer(Uid uid, int type, ArrayList<StopwatchTimer> timerPool,
                TimeBase timeBase, Parcel in) {
            super(type, timeBase, in);
            mUid = uid;
            mTimerPool = timerPool;
            mUpdateTime = in.readLong();
        }

        StopwatchTimer(Uid uid, int type, ArrayList<StopwatchTimer> timerPool,
                TimeBase timeBase) {
            super(type, timeBase);
            mUid = uid;
            mTimerPool = timerPool;
        }

        void setTimeout(long timeout) {
            mTimeout = timeout;
        }

        public void writeToParcel(Parcel out, long elapsedRealtimeUs) {
            super.writeToParcel(out, elapsedRealtimeUs);
            out.writeLong(mUpdateTime);
        }

        public void onTimeStopped(long elapsedRealtime, long baseUptime, long baseRealtime) {
            if (mNesting > 0) {
                if (DEBUG && mType < 0) {
                    Log.v(TAG, "old mUpdateTime=" + mUpdateTime);
                }
                super.onTimeStopped(elapsedRealtime, baseUptime, baseRealtime);
                mUpdateTime = baseRealtime;
                if (DEBUG && mType < 0) {
                    Log.v(TAG, "new mUpdateTime=" + mUpdateTime);
                }
            }
        }

        public void logState(Printer pw, String prefix) {
            super.logState(pw, prefix);
            pw.println(prefix + "mNesting=" + mNesting + " mUpdateTime=" + mUpdateTime
                    + " mAcquireTime=" + mAcquireTime);
        }

        void startRunningLocked(long elapsedRealtimeMs) {
            if (mNesting++ == 0) {
                final long batteryRealtime = mTimeBase.getRealtime(elapsedRealtimeMs * 1000);
                mUpdateTime = batteryRealtime;
                if (mTimerPool != null) {
                    // Accumulate time to all currently active timers before adding
                    // this new one to the pool.
                    refreshTimersLocked(batteryRealtime, mTimerPool, null);
                    // Add this timer to the active pool
                    mTimerPool.add(this);
                }
                // Increment the count
                mCount++;
                mAcquireTime = mTotalTime;
                if (DEBUG && mType < 0) {
                    Log.v(TAG, "start #" + mType + ": mUpdateTime=" + mUpdateTime
                            + " mTotalTime=" + mTotalTime + " mCount=" + mCount
                            + " mAcquireTime=" + mAcquireTime);
                }
            }
        }

        boolean isRunningLocked() {
            return mNesting > 0;
        }

        void stopRunningLocked(long elapsedRealtimeMs) {
            // Ignore attempt to stop a timer that isn't running
            if (mNesting == 0) {
                return;
            }
            if (--mNesting == 0) {
                final long batteryRealtime = mTimeBase.getRealtime(elapsedRealtimeMs * 1000);
                if (mTimerPool != null) {
                    // Accumulate time to all active counters, scaled by the total
                    // active in the pool, before taking this one out of the pool.
                    refreshTimersLocked(batteryRealtime, mTimerPool, null);
                    // Remove this timer from the active pool
                    mTimerPool.remove(this);
                } else {
                    mNesting = 1;
                    mTotalTime = computeRunTimeLocked(batteryRealtime);
                    mNesting = 0;
                }

                if (DEBUG && mType < 0) {
                    Log.v(TAG, "stop #" + mType + ": mUpdateTime=" + mUpdateTime
                            + " mTotalTime=" + mTotalTime + " mCount=" + mCount
                            + " mAcquireTime=" + mAcquireTime);
                }

                if (mTotalTime == mAcquireTime) {
                    // If there was no change in the time, then discard this
                    // count.  A somewhat cheezy strategy, but hey.
                    mCount--;
                }
            }
        }

        void stopAllRunningLocked(long elapsedRealtimeMs) {
            if (mNesting > 0) {
                mNesting = 1;
                stopRunningLocked(elapsedRealtimeMs);
            }
        }

        // Update the total time for all other running Timers with the same type as this Timer
        // due to a change in timer count
        private static long refreshTimersLocked(long batteryRealtime,
                final ArrayList<StopwatchTimer> pool, StopwatchTimer self) {
            long selfTime = 0;
            final int N = pool.size();
            for (int i=N-1; i>= 0; i--) {
                final StopwatchTimer t = pool.get(i);
                long heldTime = batteryRealtime - t.mUpdateTime;
                if (heldTime > 0) {
                    final long myTime = heldTime / N;
                    if (t == self) {
                        selfTime = myTime;
                    }
                    t.mTotalTime += myTime;
                }
                t.mUpdateTime = batteryRealtime;
            }
            return selfTime;
        }

        @Override
        protected long computeRunTimeLocked(long curBatteryRealtime) {
            if (mTimeout > 0 && curBatteryRealtime > mUpdateTime + mTimeout) {
                curBatteryRealtime = mUpdateTime + mTimeout;
            }
            return mTotalTime + (mNesting > 0
                    ? (curBatteryRealtime - mUpdateTime)
                            / (mTimerPool != null ? mTimerPool.size() : 1)
                    : 0);
        }

        @Override
        protected int computeCurrentCountLocked() {
            return mCount;
        }

        @Override
        boolean reset(boolean detachIfReset) {
            boolean canDetach = mNesting <= 0;
            super.reset(canDetach && detachIfReset);
            if (mNesting > 0) {
                mUpdateTime = mTimeBase.getRealtime(SystemClock.elapsedRealtime() * 1000);
            }
            mAcquireTime = mTotalTime;
            return canDetach;
        }

        @Override
        void detach() {
            super.detach();
            if (mTimerPool != null) {
                mTimerPool.remove(this);
            }
        }

        @Override
        void readSummaryFromParcelLocked(Parcel in) {
            super.readSummaryFromParcelLocked(in);
            mNesting = 0;
        }

        /**
         * Set the mark so that we can query later for the total time the timer has
         * accumulated since this point. The timer can be running or not.
         *
         * @param elapsedRealtimeMs the current elapsed realtime in milliseconds.
         */
        public void setMark(long elapsedRealtimeMs) {
            final long batteryRealtime = mTimeBase.getRealtime(elapsedRealtimeMs * 1000);
            if (mNesting > 0) {
                // We are running.
                if (mTimerPool != null) {
                    refreshTimersLocked(batteryRealtime, mTimerPool, this);
                } else {
                    mTotalTime += batteryRealtime - mUpdateTime;
                    mUpdateTime = batteryRealtime;
                }
            }
            mTimeBeforeMark = mTotalTime;
        }
    }

    public abstract class OverflowArrayMap<T> {
        private static final String OVERFLOW_NAME = "*overflow*";

        final ArrayMap<String, T> mMap = new ArrayMap<>();
        T mCurOverflow;
        ArrayMap<String, MutableInt> mActiveOverflow;

        public OverflowArrayMap() {
        }

        public ArrayMap<String, T> getMap() {
            return mMap;
        }

        public void clear() {
            mMap.clear();
            mCurOverflow = null;
            mActiveOverflow = null;
        }

        public void add(String name, T obj) {
            mMap.put(name, obj);
            if (OVERFLOW_NAME.equals(name)) {
                mCurOverflow = obj;
            }
        }

        public void cleanup() {
            if (mActiveOverflow != null) {
                if (mActiveOverflow.size() == 0) {
                    mActiveOverflow = null;
                }
            }
            if (mActiveOverflow == null) {
                // There is no currently active overflow, so we should no longer have
                // an overflow entry.
                if (mMap.containsKey(OVERFLOW_NAME)) {
                    Slog.wtf(TAG, "Cleaning up with no active overflow, but have overflow entry "
                            + mMap.get(OVERFLOW_NAME));
                    mMap.remove(OVERFLOW_NAME);
                }
                mCurOverflow = null;
            } else {
                // There is currently active overflow, so we should still have an overflow entry.
                if (mCurOverflow == null || !mMap.containsKey(OVERFLOW_NAME)) {
                    Slog.wtf(TAG, "Cleaning up with active overflow, but no overflow entry: cur="
                            + mCurOverflow + " map=" + mMap.get(OVERFLOW_NAME));
                }
            }
        }

        public T startObject(String name) {
            T obj = mMap.get(name);
            if (obj != null) {
                return obj;
            }

            // No object exists for the given name, but do we currently have it
            // running as part of the overflow?
            if (mActiveOverflow != null) {
                MutableInt over = mActiveOverflow.get(name);
                if (over != null) {
                    // We are already actively counting this name in the overflow object.
                    obj = mCurOverflow;
                    if (obj == null) {
                        // Shouldn't be here, but we'll try to recover.
                        Slog.wtf(TAG, "Have active overflow " + name + " but null overflow");
                        obj = mCurOverflow = instantiateObject();
                        mMap.put(OVERFLOW_NAME, obj);
                    }
                    over.value++;
                    return obj;
                }
            }

            // No object exists for given name nor in the overflow; we need to make
            // a new one.
            final int N = mMap.size();
            if (N >= MAX_WAKELOCKS_PER_UID) {
                // Went over the limit on number of objects to track; this one goes
                // in to the overflow.
                obj = mCurOverflow;
                if (obj == null) {
                    // Need to start overflow now...
                    obj = mCurOverflow = instantiateObject();
                    mMap.put(OVERFLOW_NAME, obj);
                }
                if (mActiveOverflow == null) {
                    mActiveOverflow = new ArrayMap<>();
                }
                mActiveOverflow.put(name, new MutableInt(1));
                return obj;
            }

            // Normal case where we just need to make a new object.
            obj = instantiateObject();
            mMap.put(name, obj);
            return obj;
        }

        public T stopObject(String name) {
            T obj = mMap.get(name);
            if (obj != null) {
                return obj;
            }

            // No object exists for the given name, but do we currently have it
            // running as part of the overflow?
            if (mActiveOverflow != null) {
                MutableInt over = mActiveOverflow.get(name);
                if (over != null) {
                    // We are already actively counting this name in the overflow object.
                    obj = mCurOverflow;
                    if (obj != null) {
                        over.value--;
                        if (over.value <= 0) {
                            mActiveOverflow.remove(name);
                        }
                        return obj;
                    }
                }
            }

            // Huh, they are stopping an active operation but we can't find one!
            // That's not good.
            Slog.wtf(TAG, "Unable to find object for " + name + " mapsize="
                    + mMap.size() + " activeoverflow=" + mActiveOverflow
                    + " curoverflow=" + mCurOverflow);
            return null;
        }

        public abstract T instantiateObject();
    }

    public static class ControllerActivityCounterImpl extends ControllerActivityCounter
            implements Parcelable {
        private final LongSamplingCounter mIdleTimeMillis;
        private final LongSamplingCounter mRxTimeMillis;
        private final LongSamplingCounter[] mTxTimeMillis;
        private final LongSamplingCounter mPowerDrainMaMs;

        public ControllerActivityCounterImpl(TimeBase timeBase, int numTxStates) {
            mIdleTimeMillis = new LongSamplingCounter(timeBase);
            mRxTimeMillis = new LongSamplingCounter(timeBase);
            mTxTimeMillis = new LongSamplingCounter[numTxStates];
            for (int i = 0; i < numTxStates; i++) {
                mTxTimeMillis[i] = new LongSamplingCounter(timeBase);
            }
            mPowerDrainMaMs = new LongSamplingCounter(timeBase);
        }

        public ControllerActivityCounterImpl(TimeBase timeBase, int numTxStates, Parcel in) {
            mIdleTimeMillis = new LongSamplingCounter(timeBase, in);
            mRxTimeMillis = new LongSamplingCounter(timeBase, in);
            final int recordedTxStates = in.readInt();
            if (recordedTxStates != numTxStates) {
                throw new ParcelFormatException("inconsistent tx state lengths");
            }

            mTxTimeMillis = new LongSamplingCounter[numTxStates];
            for (int i = 0; i < numTxStates; i++) {
                mTxTimeMillis[i] = new LongSamplingCounter(timeBase, in);
            }
            mPowerDrainMaMs = new LongSamplingCounter(timeBase, in);
        }

        public void readSummaryFromParcel(Parcel in) {
            mIdleTimeMillis.readSummaryFromParcelLocked(in);
            mRxTimeMillis.readSummaryFromParcelLocked(in);
            final int recordedTxStates = in.readInt();
            if (recordedTxStates != mTxTimeMillis.length) {
                throw new ParcelFormatException("inconsistent tx state lengths");
            }
            for (LongSamplingCounter counter : mTxTimeMillis) {
                counter.readSummaryFromParcelLocked(in);
            }
            mPowerDrainMaMs.readSummaryFromParcelLocked(in);
        }

        @Override
        public int describeContents() {
            return 0;
        }

        public void writeSummaryToParcel(Parcel dest) {
            mIdleTimeMillis.writeSummaryFromParcelLocked(dest);
            mRxTimeMillis.writeSummaryFromParcelLocked(dest);
            dest.writeInt(mTxTimeMillis.length);
            for (LongSamplingCounter counter : mTxTimeMillis) {
                counter.writeSummaryFromParcelLocked(dest);
            }
            mPowerDrainMaMs.writeSummaryFromParcelLocked(dest);
        }

        @Override
        public void writeToParcel(Parcel dest, int flags) {
            mIdleTimeMillis.writeToParcel(dest);
            mRxTimeMillis.writeToParcel(dest);
            dest.writeInt(mTxTimeMillis.length);
            for (LongSamplingCounter counter : mTxTimeMillis) {
                counter.writeToParcel(dest);
            }
            mPowerDrainMaMs.writeToParcel(dest);
        }

        public void reset(boolean detachIfReset) {
            mIdleTimeMillis.reset(detachIfReset);
            mRxTimeMillis.reset(detachIfReset);
            for (LongSamplingCounter counter : mTxTimeMillis) {
                counter.reset(detachIfReset);
            }
            mPowerDrainMaMs.reset(detachIfReset);
        }

        public void detach() {
            mIdleTimeMillis.detach();
            mRxTimeMillis.detach();
            for (LongSamplingCounter counter : mTxTimeMillis) {
                counter.detach();
            }
            mPowerDrainMaMs.detach();
        }

        /**
         * @return a LongSamplingCounter, measuring time spent in the idle state in
         * milliseconds.
         */
        @Override
        public LongSamplingCounter getIdleTimeCounter() {
            return mRxTimeMillis;
        }

        /**
         * @return a LongSamplingCounter, measuring time spent in the receive state in
         * milliseconds.
         */
        @Override
        public LongSamplingCounter getRxTimeCounter() {
            return mRxTimeMillis;
        }

        /**
         * @return a LongSamplingCounter[], measuring time spent in various transmit states in
         * milliseconds.
         */
        @Override
        public LongSamplingCounter[] getTxTimeCounters() {
            return mTxTimeMillis;
        }

        /**
         * @return a LongSamplingCounter, measuring power use in milli-ampere milliseconds (mAmS).
         */
        @Override
        public LongSamplingCounter getPowerCounter() {
            return mPowerDrainMaMs;
        }
    }

    /*
     * Get the wakeup reason counter, and create a new one if one
     * doesn't already exist.
     */
    public SamplingTimer getWakeupReasonTimerLocked(String name) {
        SamplingTimer timer = mWakeupReasonStats.get(name);
        if (timer == null) {
            timer = new SamplingTimer(mOnBatteryTimeBase, true);
            mWakeupReasonStats.put(name, timer);
        }
        return timer;
    }

    /*
     * Get the KernelWakelockTimer associated with name, and create a new one if one
     * doesn't already exist.
     */
    public SamplingTimer getKernelWakelockTimerLocked(String name) {
        SamplingTimer kwlt = mKernelWakelockStats.get(name);
        if (kwlt == null) {
            kwlt = new SamplingTimer(mOnBatteryScreenOffTimeBase, true /* track reported values */);
            mKernelWakelockStats.put(name, kwlt);
        }
        return kwlt;
    }

    private int writeHistoryTag(HistoryTag tag) {
        Integer idxObj = mHistoryTagPool.get(tag);
        int idx;
        if (idxObj != null) {
            idx = idxObj;
        } else {
            idx = mNextHistoryTagIdx;
            HistoryTag key = new HistoryTag();
            key.setTo(tag);
            tag.poolIdx = idx;
            mHistoryTagPool.put(key, idx);
            mNextHistoryTagIdx++;
            mNumHistoryTagChars += key.string.length() + 1;
        }
        return idx;
    }

    private void readHistoryTag(int index, HistoryTag tag) {
        tag.string = mReadHistoryStrings[index];
        tag.uid = mReadHistoryUids[index];
        tag.poolIdx = index;
    }

    // Part of initial delta int that specifies the time delta.
    static final int DELTA_TIME_MASK = 0x7ffff;
    static final int DELTA_TIME_LONG = 0x7ffff;   // The delta is a following long
    static final int DELTA_TIME_INT = 0x7fffe;    // The delta is a following int
    static final int DELTA_TIME_ABS = 0x7fffd;    // Following is an entire abs update.
    // Flag in delta int: a new battery level int follows.
    static final int DELTA_BATTERY_LEVEL_FLAG   = 0x00080000;
    // Flag in delta int: a new full state and battery status int follows.
    static final int DELTA_STATE_FLAG           = 0x00100000;
    // Flag in delta int: a new full state2 int follows.
    static final int DELTA_STATE2_FLAG          = 0x00200000;
    // Flag in delta int: contains a wakelock or wakeReason tag.
    static final int DELTA_WAKELOCK_FLAG        = 0x00400000;
    // Flag in delta int: contains an event description.
    static final int DELTA_EVENT_FLAG           = 0x00800000;
    // These upper bits are the frequently changing state bits.
    static final int DELTA_STATE_MASK           = 0xff000000;

    // These are the pieces of battery state that are packed in to the upper bits of
    // the state int that have been packed in to the first delta int.  They must fit
    // in DELTA_STATE_MASK.
    static final int STATE_BATTERY_STATUS_MASK  = 0x00000007;
    static final int STATE_BATTERY_STATUS_SHIFT = 29;
    static final int STATE_BATTERY_HEALTH_MASK  = 0x00000007;
    static final int STATE_BATTERY_HEALTH_SHIFT = 26;
    static final int STATE_BATTERY_PLUG_MASK    = 0x00000003;
    static final int STATE_BATTERY_PLUG_SHIFT   = 24;

    // We use the low bit of the battery state int to indicate that we have full details
    // from a battery level change.
    static final int BATTERY_DELTA_LEVEL_FLAG   = 0x00000001;

    public void writeHistoryDelta(Parcel dest, HistoryItem cur, HistoryItem last) {
        if (last == null || cur.cmd != HistoryItem.CMD_UPDATE) {
            dest.writeInt(DELTA_TIME_ABS);
            cur.writeToParcel(dest, 0);
            return;
        }

        final long deltaTime = cur.time - last.time;
        final int lastBatteryLevelInt = buildBatteryLevelInt(last);
        final int lastStateInt = buildStateInt(last);

        int deltaTimeToken;
        if (deltaTime < 0 || deltaTime > Integer.MAX_VALUE) {
            deltaTimeToken = DELTA_TIME_LONG;
        } else if (deltaTime >= DELTA_TIME_ABS) {
            deltaTimeToken = DELTA_TIME_INT;
        } else {
            deltaTimeToken = (int)deltaTime;
        }
        int firstToken = deltaTimeToken | (cur.states&DELTA_STATE_MASK);
        final int includeStepDetails = mLastHistoryStepLevel > cur.batteryLevel
                ? BATTERY_DELTA_LEVEL_FLAG : 0;
        final boolean computeStepDetails = includeStepDetails != 0
                || mLastHistoryStepDetails == null;
        final int batteryLevelInt = buildBatteryLevelInt(cur) | includeStepDetails;
        final boolean batteryLevelIntChanged = batteryLevelInt != lastBatteryLevelInt;
        if (batteryLevelIntChanged) {
            firstToken |= DELTA_BATTERY_LEVEL_FLAG;
        }
        final int stateInt = buildStateInt(cur);
        final boolean stateIntChanged = stateInt != lastStateInt;
        if (stateIntChanged) {
            firstToken |= DELTA_STATE_FLAG;
        }
        final boolean state2IntChanged = cur.states2 != last.states2;
        if (state2IntChanged) {
            firstToken |= DELTA_STATE2_FLAG;
        }
        if (cur.wakelockTag != null || cur.wakeReasonTag != null) {
            firstToken |= DELTA_WAKELOCK_FLAG;
        }
        if (cur.eventCode != HistoryItem.EVENT_NONE) {
            firstToken |= DELTA_EVENT_FLAG;
        }
        dest.writeInt(firstToken);
        if (DEBUG) Slog.i(TAG, "WRITE DELTA: firstToken=0x" + Integer.toHexString(firstToken)
                + " deltaTime=" + deltaTime);

        if (deltaTimeToken >= DELTA_TIME_INT) {
            if (deltaTimeToken == DELTA_TIME_INT) {
                if (DEBUG) Slog.i(TAG, "WRITE DELTA: int deltaTime=" + (int)deltaTime);
                dest.writeInt((int)deltaTime);
            } else {
                if (DEBUG) Slog.i(TAG, "WRITE DELTA: long deltaTime=" + deltaTime);
                dest.writeLong(deltaTime);
            }
        }
        if (batteryLevelIntChanged) {
            dest.writeInt(batteryLevelInt);
            if (DEBUG) Slog.i(TAG, "WRITE DELTA: batteryToken=0x"
                    + Integer.toHexString(batteryLevelInt)
                    + " batteryLevel=" + cur.batteryLevel
                    + " batteryTemp=" + cur.batteryTemperature
                    + " batteryVolt=" + (int)cur.batteryVoltage);
        }
        if (stateIntChanged) {
            dest.writeInt(stateInt);
            if (DEBUG) Slog.i(TAG, "WRITE DELTA: stateToken=0x"
                    + Integer.toHexString(stateInt)
                    + " batteryStatus=" + cur.batteryStatus
                    + " batteryHealth=" + cur.batteryHealth
                    + " batteryPlugType=" + cur.batteryPlugType
                    + " states=0x" + Integer.toHexString(cur.states));
        }
        if (state2IntChanged) {
            dest.writeInt(cur.states2);
            if (DEBUG) Slog.i(TAG, "WRITE DELTA: states2=0x"
                    + Integer.toHexString(cur.states2));
        }
        if (cur.wakelockTag != null || cur.wakeReasonTag != null) {
            int wakeLockIndex;
            int wakeReasonIndex;
            if (cur.wakelockTag != null) {
                wakeLockIndex = writeHistoryTag(cur.wakelockTag);
                if (DEBUG) Slog.i(TAG, "WRITE DELTA: wakelockTag=#" + cur.wakelockTag.poolIdx
                    + " " + cur.wakelockTag.uid + ":" + cur.wakelockTag.string);
            } else {
                wakeLockIndex = 0xffff;
            }
            if (cur.wakeReasonTag != null) {
                wakeReasonIndex = writeHistoryTag(cur.wakeReasonTag);
                if (DEBUG) Slog.i(TAG, "WRITE DELTA: wakeReasonTag=#" + cur.wakeReasonTag.poolIdx
                    + " " + cur.wakeReasonTag.uid + ":" + cur.wakeReasonTag.string);
            } else {
                wakeReasonIndex = 0xffff;
            }
            dest.writeInt((wakeReasonIndex<<16) | wakeLockIndex);
        }
        if (cur.eventCode != HistoryItem.EVENT_NONE) {
            int index = writeHistoryTag(cur.eventTag);
            int codeAndIndex = (cur.eventCode&0xffff) | (index<<16);
            dest.writeInt(codeAndIndex);
            if (DEBUG) Slog.i(TAG, "WRITE DELTA: event=" + cur.eventCode + " tag=#"
                    + cur.eventTag.poolIdx + " " + cur.eventTag.uid + ":"
                    + cur.eventTag.string);
        }
        if (computeStepDetails) {
            computeHistoryStepDetails(mCurHistoryStepDetails, mLastHistoryStepDetails);
            if (includeStepDetails != 0) {
                mCurHistoryStepDetails.writeToParcel(dest);
            }
            cur.stepDetails = mCurHistoryStepDetails;
            mLastHistoryStepDetails = mCurHistoryStepDetails;
        } else {
            cur.stepDetails = null;
        }
        if (mLastHistoryStepLevel < cur.batteryLevel) {
            mLastHistoryStepDetails = null;
        }
        mLastHistoryStepLevel = cur.batteryLevel;
    }

    private int buildBatteryLevelInt(HistoryItem h) {
        return ((((int)h.batteryLevel)<<25)&0xfe000000)
                | ((((int)h.batteryTemperature)<<15)&0x01ff8000)
                | ((((int)h.batteryVoltage)<<1)&0x00007ffe);
    }

    private void readBatteryLevelInt(int batteryLevelInt, HistoryItem out) {
        out.batteryLevel = (byte)((batteryLevelInt & 0xfe000000) >>> 25);
        out.batteryTemperature = (short)((batteryLevelInt & 0x01ff8000) >>> 15);
        out.batteryVoltage = (char)((batteryLevelInt & 0x00007ffe) >>> 1);
    }

    private int buildStateInt(HistoryItem h) {
        int plugType = 0;
        if ((h.batteryPlugType&BatteryManager.BATTERY_PLUGGED_AC) != 0) {
            plugType = 1;
        } else if ((h.batteryPlugType&BatteryManager.BATTERY_PLUGGED_USB) != 0) {
            plugType = 2;
        } else if ((h.batteryPlugType&BatteryManager.BATTERY_PLUGGED_WIRELESS) != 0) {
            plugType = 3;
        }
        return ((h.batteryStatus&STATE_BATTERY_STATUS_MASK)<<STATE_BATTERY_STATUS_SHIFT)
                | ((h.batteryHealth&STATE_BATTERY_HEALTH_MASK)<<STATE_BATTERY_HEALTH_SHIFT)
                | ((plugType&STATE_BATTERY_PLUG_MASK)<<STATE_BATTERY_PLUG_SHIFT)
                | (h.states&(~DELTA_STATE_MASK));
    }

    private void computeHistoryStepDetails(final HistoryStepDetails out,
            final HistoryStepDetails last) {
        final HistoryStepDetails tmp = last != null ? mTmpHistoryStepDetails : out;

        // Perform a CPU update right after we do this collection, so we have started
        // collecting good data for the next step.
        requestImmediateCpuUpdate();

        if (last == null) {
            // We are not generating a delta, so all we need to do is reset the stats
            // we will later be doing a delta from.
            final int NU = mUidStats.size();
            for (int i=0; i<NU; i++) {
                final BatteryStatsImpl.Uid uid = mUidStats.valueAt(i);
                uid.mLastStepUserTime = uid.mCurStepUserTime;
                uid.mLastStepSystemTime = uid.mCurStepSystemTime;
            }
            mLastStepCpuUserTime = mCurStepCpuUserTime;
            mLastStepCpuSystemTime = mCurStepCpuSystemTime;
            mLastStepStatUserTime = mCurStepStatUserTime;
            mLastStepStatSystemTime = mCurStepStatSystemTime;
            mLastStepStatIOWaitTime = mCurStepStatIOWaitTime;
            mLastStepStatIrqTime = mCurStepStatIrqTime;
            mLastStepStatSoftIrqTime = mCurStepStatSoftIrqTime;
            mLastStepStatIdleTime = mCurStepStatIdleTime;
            tmp.clear();
            return;
        }
        if (DEBUG) {
            Slog.d(TAG, "Step stats last: user=" + mLastStepCpuUserTime + " sys="
                    + mLastStepStatSystemTime + " io=" + mLastStepStatIOWaitTime
                    + " irq=" + mLastStepStatIrqTime + " sirq="
                    + mLastStepStatSoftIrqTime + " idle=" + mLastStepStatIdleTime);
            Slog.d(TAG, "Step stats cur: user=" + mCurStepCpuUserTime + " sys="
                    + mCurStepStatSystemTime + " io=" + mCurStepStatIOWaitTime
                    + " irq=" + mCurStepStatIrqTime + " sirq="
                    + mCurStepStatSoftIrqTime + " idle=" + mCurStepStatIdleTime);
        }
        out.userTime = (int)(mCurStepCpuUserTime - mLastStepCpuUserTime);
        out.systemTime = (int)(mCurStepCpuSystemTime - mLastStepCpuSystemTime);
        out.statUserTime = (int)(mCurStepStatUserTime - mLastStepStatUserTime);
        out.statSystemTime = (int)(mCurStepStatSystemTime - mLastStepStatSystemTime);
        out.statIOWaitTime = (int)(mCurStepStatIOWaitTime - mLastStepStatIOWaitTime);
        out.statIrqTime = (int)(mCurStepStatIrqTime - mLastStepStatIrqTime);
        out.statSoftIrqTime = (int)(mCurStepStatSoftIrqTime - mLastStepStatSoftIrqTime);
        out.statIdlTime = (int)(mCurStepStatIdleTime - mLastStepStatIdleTime);
        out.appCpuUid1 = out.appCpuUid2 = out.appCpuUid3 = -1;
        out.appCpuUTime1 = out.appCpuUTime2 = out.appCpuUTime3 = 0;
        out.appCpuSTime1 = out.appCpuSTime2 = out.appCpuSTime3 = 0;
        final int NU = mUidStats.size();
        for (int i=0; i<NU; i++) {
            final BatteryStatsImpl.Uid uid = mUidStats.valueAt(i);
            final int totalUTime = (int)(uid.mCurStepUserTime - uid.mLastStepUserTime);
            final int totalSTime = (int)(uid.mCurStepSystemTime - uid.mLastStepSystemTime);
            final int totalTime = totalUTime + totalSTime;
            uid.mLastStepUserTime = uid.mCurStepUserTime;
            uid.mLastStepSystemTime = uid.mCurStepSystemTime;
            if (totalTime <= (out.appCpuUTime3+out.appCpuSTime3)) {
                continue;
            }
            if (totalTime <= (out.appCpuUTime2+out.appCpuSTime2)) {
                out.appCpuUid3 = uid.mUid;
                out.appCpuUTime3 = totalUTime;
                out.appCpuSTime3 = totalSTime;
            } else {
                out.appCpuUid3 = out.appCpuUid2;
                out.appCpuUTime3 = out.appCpuUTime2;
                out.appCpuSTime3 = out.appCpuSTime2;
                if (totalTime <= (out.appCpuUTime1+out.appCpuSTime1)) {
                    out.appCpuUid2 = uid.mUid;
                    out.appCpuUTime2 = totalUTime;
                    out.appCpuSTime2 = totalSTime;
                } else {
                    out.appCpuUid2 = out.appCpuUid1;
                    out.appCpuUTime2 = out.appCpuUTime1;
                    out.appCpuSTime2 = out.appCpuSTime1;
                    out.appCpuUid1 = uid.mUid;
                    out.appCpuUTime1 = totalUTime;
                    out.appCpuSTime1 = totalSTime;
                }
            }
        }
        mLastStepCpuUserTime = mCurStepCpuUserTime;
        mLastStepCpuSystemTime = mCurStepCpuSystemTime;
        mLastStepStatUserTime = mCurStepStatUserTime;
        mLastStepStatSystemTime = mCurStepStatSystemTime;
        mLastStepStatIOWaitTime = mCurStepStatIOWaitTime;
        mLastStepStatIrqTime = mCurStepStatIrqTime;
        mLastStepStatSoftIrqTime = mCurStepStatSoftIrqTime;
        mLastStepStatIdleTime = mCurStepStatIdleTime;
    }

    public void readHistoryDelta(Parcel src, HistoryItem cur) {
        int firstToken = src.readInt();
        int deltaTimeToken = firstToken&DELTA_TIME_MASK;
        cur.cmd = HistoryItem.CMD_UPDATE;
        cur.numReadInts = 1;
        if (DEBUG) Slog.i(TAG, "READ DELTA: firstToken=0x" + Integer.toHexString(firstToken)
                + " deltaTimeToken=" + deltaTimeToken);

        if (deltaTimeToken < DELTA_TIME_ABS) {
            cur.time += deltaTimeToken;
        } else if (deltaTimeToken == DELTA_TIME_ABS) {
            cur.time = src.readLong();
            cur.numReadInts += 2;
            if (DEBUG) Slog.i(TAG, "READ DELTA: ABS time=" + cur.time);
            cur.readFromParcel(src);
            return;
        } else if (deltaTimeToken == DELTA_TIME_INT) {
            int delta = src.readInt();
            cur.time += delta;
            cur.numReadInts += 1;
            if (DEBUG) Slog.i(TAG, "READ DELTA: time delta=" + delta + " new time=" + cur.time);
        } else {
            long delta = src.readLong();
            if (DEBUG) Slog.i(TAG, "READ DELTA: time delta=" + delta + " new time=" + cur.time);
            cur.time += delta;
            cur.numReadInts += 2;
        }

        final int batteryLevelInt;
        if ((firstToken&DELTA_BATTERY_LEVEL_FLAG) != 0) {
            batteryLevelInt = src.readInt();
            readBatteryLevelInt(batteryLevelInt, cur);
            cur.numReadInts += 1;
            if (DEBUG) Slog.i(TAG, "READ DELTA: batteryToken=0x"
                    + Integer.toHexString(batteryLevelInt)
                    + " batteryLevel=" + cur.batteryLevel
                    + " batteryTemp=" + cur.batteryTemperature
                    + " batteryVolt=" + (int)cur.batteryVoltage);
        } else {
            batteryLevelInt = 0;
        }

        if ((firstToken&DELTA_STATE_FLAG) != 0) {
            int stateInt = src.readInt();
            cur.states = (firstToken&DELTA_STATE_MASK) | (stateInt&(~DELTA_STATE_MASK));
            cur.batteryStatus = (byte)((stateInt>>STATE_BATTERY_STATUS_SHIFT)
                    & STATE_BATTERY_STATUS_MASK);
            cur.batteryHealth = (byte)((stateInt>>STATE_BATTERY_HEALTH_SHIFT)
                    & STATE_BATTERY_HEALTH_MASK);
            cur.batteryPlugType = (byte)((stateInt>>STATE_BATTERY_PLUG_SHIFT)
                    & STATE_BATTERY_PLUG_MASK);
            switch (cur.batteryPlugType) {
                case 1:
                    cur.batteryPlugType = BatteryManager.BATTERY_PLUGGED_AC;
                    break;
                case 2:
                    cur.batteryPlugType = BatteryManager.BATTERY_PLUGGED_USB;
                    break;
                case 3:
                    cur.batteryPlugType = BatteryManager.BATTERY_PLUGGED_WIRELESS;
                    break;
            }
            cur.numReadInts += 1;
            if (DEBUG) Slog.i(TAG, "READ DELTA: stateToken=0x"
                    + Integer.toHexString(stateInt)
                    + " batteryStatus=" + cur.batteryStatus
                    + " batteryHealth=" + cur.batteryHealth
                    + " batteryPlugType=" + cur.batteryPlugType
                    + " states=0x" + Integer.toHexString(cur.states));
        } else {
            cur.states = (firstToken&DELTA_STATE_MASK) | (cur.states&(~DELTA_STATE_MASK));
        }

        if ((firstToken&DELTA_STATE2_FLAG) != 0) {
            cur.states2 = src.readInt();
            if (DEBUG) Slog.i(TAG, "READ DELTA: states2=0x"
                    + Integer.toHexString(cur.states2));
        }

        if ((firstToken&DELTA_WAKELOCK_FLAG) != 0) {
            int indexes = src.readInt();
            int wakeLockIndex = indexes&0xffff;
            int wakeReasonIndex = (indexes>>16)&0xffff;
            if (wakeLockIndex != 0xffff) {
                cur.wakelockTag = cur.localWakelockTag;
                readHistoryTag(wakeLockIndex, cur.wakelockTag);
                if (DEBUG) Slog.i(TAG, "READ DELTA: wakelockTag=#" + cur.wakelockTag.poolIdx
                    + " " + cur.wakelockTag.uid + ":" + cur.wakelockTag.string);
            } else {
                cur.wakelockTag = null;
            }
            if (wakeReasonIndex != 0xffff) {
                cur.wakeReasonTag = cur.localWakeReasonTag;
                readHistoryTag(wakeReasonIndex, cur.wakeReasonTag);
                if (DEBUG) Slog.i(TAG, "READ DELTA: wakeReasonTag=#" + cur.wakeReasonTag.poolIdx
                    + " " + cur.wakeReasonTag.uid + ":" + cur.wakeReasonTag.string);
            } else {
                cur.wakeReasonTag = null;
            }
            cur.numReadInts += 1;
        } else {
            cur.wakelockTag = null;
            cur.wakeReasonTag = null;
        }

        if ((firstToken&DELTA_EVENT_FLAG) != 0) {
            cur.eventTag = cur.localEventTag;
            final int codeAndIndex = src.readInt();
            cur.eventCode = (codeAndIndex&0xffff);
            final int index = ((codeAndIndex>>16)&0xffff);
            readHistoryTag(index, cur.eventTag);
            cur.numReadInts += 1;
            if (DEBUG) Slog.i(TAG, "READ DELTA: event=" + cur.eventCode + " tag=#"
                    + cur.eventTag.poolIdx + " " + cur.eventTag.uid + ":"
                    + cur.eventTag.string);
        } else {
            cur.eventCode = HistoryItem.EVENT_NONE;
        }

        if ((batteryLevelInt&BATTERY_DELTA_LEVEL_FLAG) != 0) {
            cur.stepDetails = mReadHistoryStepDetails;
            cur.stepDetails.readFromParcel(src);
        } else {
            cur.stepDetails = null;
        }
    }

    @Override
    public void commitCurrentHistoryBatchLocked() {
        mHistoryLastWritten.cmd = HistoryItem.CMD_NULL;
    }

    void addHistoryBufferLocked(long elapsedRealtimeMs, long uptimeMs, HistoryItem cur) {
        if (!mHaveBatteryLevel || !mRecordingHistory) {
            return;
        }

        final long timeDiff = (mHistoryBaseTime+elapsedRealtimeMs) - mHistoryLastWritten.time;
        final int diffStates = mHistoryLastWritten.states^(cur.states&mActiveHistoryStates);
        final int diffStates2 = mHistoryLastWritten.states2^(cur.states2&mActiveHistoryStates2);
        final int lastDiffStates = mHistoryLastWritten.states^mHistoryLastLastWritten.states;
        final int lastDiffStates2 = mHistoryLastWritten.states2^mHistoryLastLastWritten.states2;
        if (DEBUG) Slog.i(TAG, "ADD: tdelta=" + timeDiff + " diff="
                + Integer.toHexString(diffStates) + " lastDiff="
                + Integer.toHexString(lastDiffStates) + " diff2="
                + Integer.toHexString(diffStates2) + " lastDiff2="
                + Integer.toHexString(lastDiffStates2));
        if (mHistoryBufferLastPos >= 0 && mHistoryLastWritten.cmd == HistoryItem.CMD_UPDATE
                && timeDiff < 1000 && (diffStates&lastDiffStates) == 0
                && (diffStates2&lastDiffStates2) == 0
                && (mHistoryLastWritten.wakelockTag == null || cur.wakelockTag == null)
                && (mHistoryLastWritten.wakeReasonTag == null || cur.wakeReasonTag == null)
                && mHistoryLastWritten.stepDetails == null
                && (mHistoryLastWritten.eventCode == HistoryItem.EVENT_NONE
                        || cur.eventCode == HistoryItem.EVENT_NONE)
                && mHistoryLastWritten.batteryLevel == cur.batteryLevel
                && mHistoryLastWritten.batteryStatus == cur.batteryStatus
                && mHistoryLastWritten.batteryHealth == cur.batteryHealth
                && mHistoryLastWritten.batteryPlugType == cur.batteryPlugType
                && mHistoryLastWritten.batteryTemperature == cur.batteryTemperature
                && mHistoryLastWritten.batteryVoltage == cur.batteryVoltage) {
            // We can merge this new change in with the last one.  Merging is
            // allowed as long as only the states have changed, and within those states
            // as long as no bit has changed both between now and the last entry, as
            // well as the last entry and the one before it (so we capture any toggles).
            if (DEBUG) Slog.i(TAG, "ADD: rewinding back to " + mHistoryBufferLastPos);
            mHistoryBuffer.setDataSize(mHistoryBufferLastPos);
            mHistoryBuffer.setDataPosition(mHistoryBufferLastPos);
            mHistoryBufferLastPos = -1;
            elapsedRealtimeMs = mHistoryLastWritten.time - mHistoryBaseTime;
            // If the last written history had a wakelock tag, we need to retain it.
            // Note that the condition above made sure that we aren't in a case where
            // both it and the current history item have a wakelock tag.
            if (mHistoryLastWritten.wakelockTag != null) {
                cur.wakelockTag = cur.localWakelockTag;
                cur.wakelockTag.setTo(mHistoryLastWritten.wakelockTag);
            }
            // If the last written history had a wake reason tag, we need to retain it.
            // Note that the condition above made sure that we aren't in a case where
            // both it and the current history item have a wakelock tag.
            if (mHistoryLastWritten.wakeReasonTag != null) {
                cur.wakeReasonTag = cur.localWakeReasonTag;
                cur.wakeReasonTag.setTo(mHistoryLastWritten.wakeReasonTag);
            }
            // If the last written history had an event, we need to retain it.
            // Note that the condition above made sure that we aren't in a case where
            // both it and the current history item have an event.
            if (mHistoryLastWritten.eventCode != HistoryItem.EVENT_NONE) {
                cur.eventCode = mHistoryLastWritten.eventCode;
                cur.eventTag = cur.localEventTag;
                cur.eventTag.setTo(mHistoryLastWritten.eventTag);
            }
            mHistoryLastWritten.setTo(mHistoryLastLastWritten);
        }

        final int dataSize = mHistoryBuffer.dataSize();
        if (dataSize >= MAX_HISTORY_BUFFER) {
            if (!mHistoryOverflow) {
                mHistoryOverflow = true;
                addHistoryBufferLocked(elapsedRealtimeMs, uptimeMs, HistoryItem.CMD_UPDATE, cur);
                addHistoryBufferLocked(elapsedRealtimeMs, uptimeMs, HistoryItem.CMD_OVERFLOW, cur);
                return;
            }

            // After overflow, we allow various bit-wise states to settle to 0.
            boolean writeAnyway = false;
            final int curStates = cur.states & HistoryItem.SETTLE_TO_ZERO_STATES
                    & mActiveHistoryStates;
            if (mHistoryLastWritten.states != curStates) {
                // mActiveHistoryStates keeps track of which bits in .states are now being
                // forced to 0.
                int old = mActiveHistoryStates;
                mActiveHistoryStates &= curStates | ~HistoryItem.SETTLE_TO_ZERO_STATES;
                writeAnyway |= old != mActiveHistoryStates;
            }
            final int curStates2 = cur.states2 & HistoryItem.SETTLE_TO_ZERO_STATES2
                    & mActiveHistoryStates2;
            if (mHistoryLastWritten.states2 != curStates2) {
                // mActiveHistoryStates2 keeps track of which bits in .states2 are now being
                // forced to 0.
                int old = mActiveHistoryStates2;
                mActiveHistoryStates2 &= curStates2 | ~HistoryItem.SETTLE_TO_ZERO_STATES2;
                writeAnyway |= old != mActiveHistoryStates2;
            }

            // Once we've reached the maximum number of items, we only
            // record changes to the battery level and the most interesting states.
            // Once we've reached the maximum maximum number of items, we only
            // record changes to the battery level.
            if (!writeAnyway && mHistoryLastWritten.batteryLevel == cur.batteryLevel &&
                    (dataSize >= MAX_MAX_HISTORY_BUFFER
                            || ((mHistoryLastWritten.states^cur.states)
                                    & HistoryItem.MOST_INTERESTING_STATES) == 0
                            || ((mHistoryLastWritten.states2^cur.states2)
                                    & HistoryItem.MOST_INTERESTING_STATES2) == 0)) {
                return;
            }

            addHistoryBufferLocked(elapsedRealtimeMs, uptimeMs, HistoryItem.CMD_UPDATE, cur);
            return;
        }

        if (dataSize == 0) {
            // The history is currently empty; we need it to start with a time stamp.
            cur.currentTime = System.currentTimeMillis();
            addHistoryBufferLocked(elapsedRealtimeMs, uptimeMs, HistoryItem.CMD_RESET, cur);
        }
        addHistoryBufferLocked(elapsedRealtimeMs, uptimeMs, HistoryItem.CMD_UPDATE, cur);
    }

    private void addHistoryBufferLocked(long elapsedRealtimeMs, long uptimeMs, byte cmd,
            HistoryItem cur) {
        if (mIteratingHistory) {
            throw new IllegalStateException("Can't do this while iterating history!");
        }
        mHistoryBufferLastPos = mHistoryBuffer.dataPosition();
        mHistoryLastLastWritten.setTo(mHistoryLastWritten);
        mHistoryLastWritten.setTo(mHistoryBaseTime + elapsedRealtimeMs, cmd, cur);
        mHistoryLastWritten.states &= mActiveHistoryStates;
        mHistoryLastWritten.states2 &= mActiveHistoryStates2;
        writeHistoryDelta(mHistoryBuffer, mHistoryLastWritten, mHistoryLastLastWritten);
        mLastHistoryElapsedRealtime = elapsedRealtimeMs;
        cur.wakelockTag = null;
        cur.wakeReasonTag = null;
        cur.eventCode = HistoryItem.EVENT_NONE;
        cur.eventTag = null;
        if (DEBUG_HISTORY) Slog.i(TAG, "Writing history buffer: was " + mHistoryBufferLastPos
                + " now " + mHistoryBuffer.dataPosition()
                + " size is now " + mHistoryBuffer.dataSize());
    }

    int mChangedStates = 0;
    int mChangedStates2 = 0;

    void addHistoryRecordLocked(long elapsedRealtimeMs, long uptimeMs) {
        if (mTrackRunningHistoryElapsedRealtime != 0) {
            final long diffElapsed = elapsedRealtimeMs - mTrackRunningHistoryElapsedRealtime;
            final long diffUptime = uptimeMs - mTrackRunningHistoryUptime;
            if (diffUptime < (diffElapsed-20)) {
                final long wakeElapsedTime = elapsedRealtimeMs - (diffElapsed - diffUptime);
                mHistoryAddTmp.setTo(mHistoryLastWritten);
                mHistoryAddTmp.wakelockTag = null;
                mHistoryAddTmp.wakeReasonTag = null;
                mHistoryAddTmp.eventCode = HistoryItem.EVENT_NONE;
                mHistoryAddTmp.states &= ~HistoryItem.STATE_CPU_RUNNING_FLAG;
                addHistoryRecordInnerLocked(wakeElapsedTime, uptimeMs, mHistoryAddTmp);
            }
        }
        mHistoryCur.states |= HistoryItem.STATE_CPU_RUNNING_FLAG;
        mTrackRunningHistoryElapsedRealtime = elapsedRealtimeMs;
        mTrackRunningHistoryUptime = uptimeMs;
        addHistoryRecordInnerLocked(elapsedRealtimeMs, uptimeMs, mHistoryCur);
    }

    void addHistoryRecordInnerLocked(long elapsedRealtimeMs, long uptimeMs, HistoryItem cur) {
        addHistoryBufferLocked(elapsedRealtimeMs, uptimeMs, cur);

        if (!USE_OLD_HISTORY) {
            return;
        }

        if (!mHaveBatteryLevel || !mRecordingHistory) {
            return;
        }

        // If the current time is basically the same as the last time,
        // and no states have since the last recorded entry changed and
        // are now resetting back to their original value, then just collapse
        // into one record.
        if (mHistoryEnd != null && mHistoryEnd.cmd == HistoryItem.CMD_UPDATE
                && (mHistoryBaseTime+elapsedRealtimeMs) < (mHistoryEnd.time+1000)
                && ((mHistoryEnd.states^cur.states)&mChangedStates&mActiveHistoryStates) == 0
                && ((mHistoryEnd.states2^cur.states2)&mChangedStates2&mActiveHistoryStates2) == 0) {
            // If the current is the same as the one before, then we no
            // longer need the entry.
            if (mHistoryLastEnd != null && mHistoryLastEnd.cmd == HistoryItem.CMD_UPDATE
                    && (mHistoryBaseTime+elapsedRealtimeMs) < (mHistoryEnd.time+500)
                    && mHistoryLastEnd.sameNonEvent(cur)) {
                mHistoryLastEnd.next = null;
                mHistoryEnd.next = mHistoryCache;
                mHistoryCache = mHistoryEnd;
                mHistoryEnd = mHistoryLastEnd;
                mHistoryLastEnd = null;
            } else {
                mChangedStates |= mHistoryEnd.states^(cur.states&mActiveHistoryStates);
                mChangedStates2 |= mHistoryEnd.states^(cur.states2&mActiveHistoryStates2);
                mHistoryEnd.setTo(mHistoryEnd.time, HistoryItem.CMD_UPDATE, cur);
            }
            return;
        }

        mChangedStates = 0;
        mChangedStates2 = 0;

        if (mNumHistoryItems == MAX_HISTORY_ITEMS
                || mNumHistoryItems == MAX_MAX_HISTORY_ITEMS) {
            addHistoryRecordLocked(elapsedRealtimeMs, HistoryItem.CMD_OVERFLOW);
        }

        if (mNumHistoryItems >= MAX_HISTORY_ITEMS) {
            // Once we've reached the maximum number of items, we only
            // record changes to the battery level and the most interesting states.
            // Once we've reached the maximum maximum number of items, we only
            // record changes to the battery level.
            if (mHistoryEnd != null && mHistoryEnd.batteryLevel
                    == cur.batteryLevel &&
                    (mNumHistoryItems >= MAX_MAX_HISTORY_ITEMS
                            || ((mHistoryEnd.states^(cur.states&mActiveHistoryStates))
                                    & HistoryItem.MOST_INTERESTING_STATES) == 0)) {
                return;
            }
        }

        addHistoryRecordLocked(elapsedRealtimeMs, HistoryItem.CMD_UPDATE);
    }

    public void addHistoryEventLocked(long elapsedRealtimeMs, long uptimeMs, int code,
            String name, int uid) {
        mHistoryCur.eventCode = code;
        mHistoryCur.eventTag = mHistoryCur.localEventTag;
        mHistoryCur.eventTag.string = name;
        mHistoryCur.eventTag.uid = uid;
        addHistoryRecordLocked(elapsedRealtimeMs, uptimeMs);
    }

    void addHistoryRecordLocked(long elapsedRealtimeMs, long uptimeMs, byte cmd, HistoryItem cur) {
        HistoryItem rec = mHistoryCache;
        if (rec != null) {
            mHistoryCache = rec.next;
        } else {
            rec = new HistoryItem();
        }
        rec.setTo(mHistoryBaseTime + elapsedRealtimeMs, cmd, cur);

        addHistoryRecordLocked(rec);
    }

    void addHistoryRecordLocked(HistoryItem rec) {
        mNumHistoryItems++;
        rec.next = null;
        mHistoryLastEnd = mHistoryEnd;
        if (mHistoryEnd != null) {
            mHistoryEnd.next = rec;
            mHistoryEnd = rec;
        } else {
            mHistory = mHistoryEnd = rec;
        }
    }

    void clearHistoryLocked() {
        if (DEBUG_HISTORY) Slog.i(TAG, "********** CLEARING HISTORY!");
        if (USE_OLD_HISTORY) {
            if (mHistory != null) {
                mHistoryEnd.next = mHistoryCache;
                mHistoryCache = mHistory;
                mHistory = mHistoryLastEnd = mHistoryEnd = null;
            }
            mNumHistoryItems = 0;
        }

        mHistoryBaseTime = 0;
        mLastHistoryElapsedRealtime = 0;
        mTrackRunningHistoryElapsedRealtime = 0;
        mTrackRunningHistoryUptime = 0;

        mHistoryBuffer.setDataSize(0);
        mHistoryBuffer.setDataPosition(0);
        mHistoryBuffer.setDataCapacity(MAX_HISTORY_BUFFER / 2);
        mHistoryLastLastWritten.clear();
        mHistoryLastWritten.clear();
        mHistoryTagPool.clear();
        mNextHistoryTagIdx = 0;
        mNumHistoryTagChars = 0;
        mHistoryBufferLastPos = -1;
        mHistoryOverflow = false;
        mActiveHistoryStates = 0xffffffff;
        mActiveHistoryStates2 = 0xffffffff;
    }

    public void updateTimeBasesLocked(boolean unplugged, boolean screenOff, long uptime,
            long realtime) {
        mOnBatteryTimeBase.setRunning(unplugged, uptime, realtime);

        boolean unpluggedScreenOff = unplugged && screenOff;
        if (unpluggedScreenOff != mOnBatteryScreenOffTimeBase.isRunning()) {
            updateKernelWakelocksLocked();
            if (DEBUG_ENERGY_CPU) {
                Slog.d(TAG, "Updating cpu time because screen is now " +
                        (unpluggedScreenOff ? "off" : "on"));
            }
            updateCpuTimeLocked();
            mOnBatteryScreenOffTimeBase.setRunning(unpluggedScreenOff, uptime, realtime);
        }
    }

    public void addIsolatedUidLocked(int isolatedUid, int appUid) {
        mIsolatedUids.put(isolatedUid, appUid);
    }

    /**
     * Schedules a read of the latest cpu times before removing the isolated UID.
     * @see #removeIsolatedUidLocked(int)
     */
    public void scheduleRemoveIsolatedUidLocked(int isolatedUid, int appUid) {
        int curUid = mIsolatedUids.get(isolatedUid, -1);
        if (curUid == appUid) {
            if (mExternalSync != null) {
                mExternalSync.scheduleCpuSyncDueToRemovedUid(isolatedUid);
            }
        }
    }

    /**
     * This should only be called after the cpu times have been read.
     * @see #scheduleRemoveIsolatedUidLocked(int, int)
     */
    public void removeIsolatedUidLocked(int isolatedUid) {
        mIsolatedUids.delete(isolatedUid);
        mKernelUidCpuTimeReader.removeUid(isolatedUid);
    }

    public int mapUid(int uid) {
        int isolated = mIsolatedUids.get(uid, -1);
        return isolated > 0 ? isolated : uid;
    }

    public void noteEventLocked(int code, String name, int uid) {
        uid = mapUid(uid);
        if (!mActiveEvents.updateState(code, name, uid, 0)) {
            return;
        }
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        addHistoryEventLocked(elapsedRealtime, uptime, code, name, uid);
    }

    boolean ensureStartClockTime(final long currentTime) {
        final long ABOUT_ONE_YEAR = 365*24*60*60*1000L;
        if (currentTime > ABOUT_ONE_YEAR && mStartClockTime < (currentTime-ABOUT_ONE_YEAR)) {
            // If the start clock time has changed by more than a year, then presumably
            // the previous time was completely bogus.  So we are going to figure out a
            // new time based on how much time has elapsed since we started counting.
            mStartClockTime = currentTime - (SystemClock.elapsedRealtime()-(mRealtimeStart/1000));
            return true;
        }
        return false;
    }

    public void noteCurrentTimeChangedLocked() {
        final long currentTime = System.currentTimeMillis();
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        recordCurrentTimeChangeLocked(currentTime, elapsedRealtime, uptime);
        ensureStartClockTime(currentTime);
    }

    public void noteProcessStartLocked(String name, int uid) {
        uid = mapUid(uid);
        if (isOnBattery()) {
            Uid u = getUidStatsLocked(uid);
            u.getProcessStatsLocked(name).incStartsLocked();
        }
        if (!mActiveEvents.updateState(HistoryItem.EVENT_PROC_START, name, uid, 0)) {
            return;
        }
        if (!mRecordAllHistory) {
            return;
        }
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_PROC_START, name, uid);
    }

    public void noteProcessCrashLocked(String name, int uid) {
        uid = mapUid(uid);
        if (isOnBattery()) {
            Uid u = getUidStatsLocked(uid);
            u.getProcessStatsLocked(name).incNumCrashesLocked();
        }
    }

    public void noteProcessAnrLocked(String name, int uid) {
        uid = mapUid(uid);
        if (isOnBattery()) {
            Uid u = getUidStatsLocked(uid);
            u.getProcessStatsLocked(name).incNumAnrsLocked();
        }
    }

    public void noteUidProcessStateLocked(int uid, int state) {
        uid = mapUid(uid);
        getUidStatsLocked(uid).updateUidProcessStateLocked(state);
    }

    public void noteProcessFinishLocked(String name, int uid) {
        uid = mapUid(uid);
        if (!mActiveEvents.updateState(HistoryItem.EVENT_PROC_FINISH, name, uid, 0)) {
            return;
        }
        if (!mRecordAllHistory) {
            return;
        }
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_PROC_FINISH, name, uid);
    }

    public void noteSyncStartLocked(String name, int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        getUidStatsLocked(uid).noteStartSyncLocked(name, elapsedRealtime);
        if (!mActiveEvents.updateState(HistoryItem.EVENT_SYNC_START, name, uid, 0)) {
            return;
        }
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_SYNC_START, name, uid);
    }

    public void noteSyncFinishLocked(String name, int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        getUidStatsLocked(uid).noteStopSyncLocked(name, elapsedRealtime);
        if (!mActiveEvents.updateState(HistoryItem.EVENT_SYNC_FINISH, name, uid, 0)) {
            return;
        }
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_SYNC_FINISH, name, uid);
    }

    public void noteJobStartLocked(String name, int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        getUidStatsLocked(uid).noteStartJobLocked(name, elapsedRealtime);
        if (!mActiveEvents.updateState(HistoryItem.EVENT_JOB_START, name, uid, 0)) {
            return;
        }
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_JOB_START, name, uid);
    }

    public void noteJobFinishLocked(String name, int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        getUidStatsLocked(uid).noteStopJobLocked(name, elapsedRealtime);
        if (!mActiveEvents.updateState(HistoryItem.EVENT_JOB_FINISH, name, uid, 0)) {
            return;
        }
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_JOB_FINISH, name, uid);
    }

    public void noteAlarmStartLocked(String name, int uid) {
        if (!mRecordAllHistory) {
            return;
        }
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (!mActiveEvents.updateState(HistoryItem.EVENT_ALARM_START, name, uid, 0)) {
            return;
        }
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_ALARM_START, name, uid);
    }

    public void noteAlarmFinishLocked(String name, int uid) {
        if (!mRecordAllHistory) {
            return;
        }
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (!mActiveEvents.updateState(HistoryItem.EVENT_ALARM_FINISH, name, uid, 0)) {
            return;
        }
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_ALARM_FINISH, name, uid);
    }

    private void requestWakelockCpuUpdate() {
        if (!mHandler.hasMessages(MSG_UPDATE_WAKELOCKS)) {
            Message m = mHandler.obtainMessage(MSG_UPDATE_WAKELOCKS);
            mHandler.sendMessageDelayed(m, DELAY_UPDATE_WAKELOCKS);
        }
    }

    private void requestImmediateCpuUpdate() {
        mHandler.removeMessages(MSG_UPDATE_WAKELOCKS);
        mHandler.sendEmptyMessage(MSG_UPDATE_WAKELOCKS);
    }

    public void setRecordAllHistoryLocked(boolean enabled) {
        mRecordAllHistory = enabled;
        if (!enabled) {
            // Clear out any existing state.
            mActiveEvents.removeEvents(HistoryItem.EVENT_WAKE_LOCK);
            mActiveEvents.removeEvents(HistoryItem.EVENT_ALARM);
            // Record the currently running processes as stopping, now that we are no
            // longer tracking them.
            HashMap<String, SparseIntArray> active = mActiveEvents.getStateForEvent(
                    HistoryItem.EVENT_PROC);
            if (active != null) {
                long mSecRealtime = SystemClock.elapsedRealtime();
                final long mSecUptime = SystemClock.uptimeMillis();
                for (HashMap.Entry<String, SparseIntArray> ent : active.entrySet()) {
                    SparseIntArray uids = ent.getValue();
                    for (int j=0; j<uids.size(); j++) {
                        addHistoryEventLocked(mSecRealtime, mSecUptime,
                                HistoryItem.EVENT_PROC_FINISH, ent.getKey(), uids.keyAt(j));
                    }
                }
            }
        } else {
            // Record the currently running processes as starting, now that we are tracking them.
            HashMap<String, SparseIntArray> active = mActiveEvents.getStateForEvent(
                    HistoryItem.EVENT_PROC);
            if (active != null) {
                long mSecRealtime = SystemClock.elapsedRealtime();
                final long mSecUptime = SystemClock.uptimeMillis();
                for (HashMap.Entry<String, SparseIntArray> ent : active.entrySet()) {
                    SparseIntArray uids = ent.getValue();
                    for (int j=0; j<uids.size(); j++) {
                        addHistoryEventLocked(mSecRealtime, mSecUptime,
                                HistoryItem.EVENT_PROC_START, ent.getKey(), uids.keyAt(j));
                    }
                }
            }
        }
    }

    public void setNoAutoReset(boolean enabled) {
        mNoAutoReset = enabled;
    }

    private String mInitialAcquireWakeName;
    private int mInitialAcquireWakeUid = -1;

    public void noteStartWakeLocked(int uid, int pid, String name, String historyName, int type,
            boolean unimportantForLogging, long elapsedRealtime, long uptime) {
        uid = mapUid(uid);
        if (type == WAKE_TYPE_PARTIAL) {
            // Only care about partial wake locks, since full wake locks
            // will be canceled when the user puts the screen to sleep.
            aggregateLastWakeupUptimeLocked(uptime);
            if (historyName == null) {
                historyName = name;
            }
            if (mRecordAllHistory) {
                if (mActiveEvents.updateState(HistoryItem.EVENT_WAKE_LOCK_START, historyName,
                        uid, 0)) {
                    addHistoryEventLocked(elapsedRealtime, uptime,
                            HistoryItem.EVENT_WAKE_LOCK_START, historyName, uid);
                }
            }
            if (mWakeLockNesting == 0) {
                mHistoryCur.states |= HistoryItem.STATE_WAKE_LOCK_FLAG;
                if (DEBUG_HISTORY) Slog.v(TAG, "Start wake lock to: "
                        + Integer.toHexString(mHistoryCur.states));
                mHistoryCur.wakelockTag = mHistoryCur.localWakelockTag;
                mHistoryCur.wakelockTag.string = mInitialAcquireWakeName = historyName;
                mHistoryCur.wakelockTag.uid = mInitialAcquireWakeUid = uid;
                mWakeLockImportant = !unimportantForLogging;
                addHistoryRecordLocked(elapsedRealtime, uptime);
            } else if (!mWakeLockImportant && !unimportantForLogging
                    && mHistoryLastWritten.cmd == HistoryItem.CMD_UPDATE) {
                if (mHistoryLastWritten.wakelockTag != null) {
                    // We'll try to update the last tag.
                    mHistoryLastWritten.wakelockTag = null;
                    mHistoryCur.wakelockTag = mHistoryCur.localWakelockTag;
                    mHistoryCur.wakelockTag.string = mInitialAcquireWakeName = historyName;
                    mHistoryCur.wakelockTag.uid = mInitialAcquireWakeUid = uid;
                    addHistoryRecordLocked(elapsedRealtime, uptime);
                }
                mWakeLockImportant = true;
            }
            mWakeLockNesting++;
        }
        if (uid >= 0) {
            if (mOnBatteryScreenOffTimeBase.isRunning()) {
                // We only update the cpu time when a wake lock is acquired if the screen is off.
                // If the screen is on, we don't distribute the power amongst partial wakelocks.
                if (DEBUG_ENERGY_CPU) {
                    Slog.d(TAG, "Updating cpu time because of +wake_lock");
                }
                requestWakelockCpuUpdate();
            }
            getUidStatsLocked(uid).noteStartWakeLocked(pid, name, type, elapsedRealtime);
        }
    }

    public void noteStopWakeLocked(int uid, int pid, String name, String historyName, int type,
            long elapsedRealtime, long uptime) {
        uid = mapUid(uid);
        if (type == WAKE_TYPE_PARTIAL) {
            mWakeLockNesting--;
            if (mRecordAllHistory) {
                if (historyName == null) {
                    historyName = name;
                }
                if (mActiveEvents.updateState(HistoryItem.EVENT_WAKE_LOCK_FINISH, historyName,
                        uid, 0)) {
                    addHistoryEventLocked(elapsedRealtime, uptime,
                            HistoryItem.EVENT_WAKE_LOCK_FINISH, historyName, uid);
                }
            }
            if (mWakeLockNesting == 0) {
                mHistoryCur.states &= ~HistoryItem.STATE_WAKE_LOCK_FLAG;
                if (DEBUG_HISTORY) Slog.v(TAG, "Stop wake lock to: "
                        + Integer.toHexString(mHistoryCur.states));
                mInitialAcquireWakeName = null;
                mInitialAcquireWakeUid = -1;
                addHistoryRecordLocked(elapsedRealtime, uptime);
            }
        }
        if (uid >= 0) {
            if (mOnBatteryScreenOffTimeBase.isRunning()) {
                if (DEBUG_ENERGY_CPU) {
                    Slog.d(TAG, "Updating cpu time because of -wake_lock");
                }
                requestWakelockCpuUpdate();
            }
            getUidStatsLocked(uid).noteStopWakeLocked(pid, name, type, elapsedRealtime);
        }
    }

    public void noteStartWakeFromSourceLocked(WorkSource ws, int pid, String name,
            String historyName, int type, boolean unimportantForLogging) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        final int N = ws.size();
        for (int i=0; i<N; i++) {
            noteStartWakeLocked(ws.get(i), pid, name, historyName, type, unimportantForLogging,
                    elapsedRealtime, uptime);
        }
    }

    public void noteChangeWakelockFromSourceLocked(WorkSource ws, int pid, String name,
            String historyName, int type, WorkSource newWs, int newPid, String newName,
            String newHistoryName, int newType, boolean newUnimportantForLogging) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        // For correct semantics, we start the need worksources first, so that we won't
        // make inappropriate history items as if all wake locks went away and new ones
        // appeared.  This is okay because tracking of wake locks allows nesting.
        final int NN = newWs.size();
        for (int i=0; i<NN; i++) {
            noteStartWakeLocked(newWs.get(i), newPid, newName, newHistoryName, newType,
                    newUnimportantForLogging, elapsedRealtime, uptime);
        }
        final int NO = ws.size();
        for (int i=0; i<NO; i++) {
            noteStopWakeLocked(ws.get(i), pid, name, historyName, type, elapsedRealtime, uptime);
        }
    }

    public void noteStopWakeFromSourceLocked(WorkSource ws, int pid, String name,
            String historyName, int type) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        final int N = ws.size();
        for (int i=0; i<N; i++) {
            noteStopWakeLocked(ws.get(i), pid, name, historyName, type, elapsedRealtime, uptime);
        }
    }

    void aggregateLastWakeupUptimeLocked(long uptimeMs) {
        if (mLastWakeupReason != null) {
            long deltaUptime = uptimeMs - mLastWakeupUptimeMs;
            SamplingTimer timer = getWakeupReasonTimerLocked(mLastWakeupReason);
            timer.addCurrentReportedCount(1);
            timer.addCurrentReportedTotalTime(deltaUptime * 1000); // time is in microseconds
            mLastWakeupReason = null;
        }
    }

    public void noteWakeupReasonLocked(String reason) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (DEBUG_HISTORY) Slog.v(TAG, "Wakeup reason \"" + reason +"\": "
                + Integer.toHexString(mHistoryCur.states));
        aggregateLastWakeupUptimeLocked(uptime);
        mHistoryCur.wakeReasonTag = mHistoryCur.localWakeReasonTag;
        mHistoryCur.wakeReasonTag.string = reason;
        mHistoryCur.wakeReasonTag.uid = 0;
        mLastWakeupReason = reason;
        mLastWakeupUptimeMs = uptime;
        addHistoryRecordLocked(elapsedRealtime, uptime);
    }

    public boolean startAddingCpuLocked() {
        mHandler.removeMessages(MSG_UPDATE_WAKELOCKS);
        return mOnBatteryInternal;
    }

    public void finishAddingCpuLocked(int totalUTime, int totalSTime, int statUserTime,
                                      int statSystemTime, int statIOWaitTime, int statIrqTime,
                                      int statSoftIrqTime, int statIdleTime) {
        if (DEBUG) Slog.d(TAG, "Adding cpu: tuser=" + totalUTime + " tsys=" + totalSTime
                + " user=" + statUserTime + " sys=" + statSystemTime
                + " io=" + statIOWaitTime + " irq=" + statIrqTime
                + " sirq=" + statSoftIrqTime + " idle=" + statIdleTime);
        mCurStepCpuUserTime += totalUTime;
        mCurStepCpuSystemTime += totalSTime;
        mCurStepStatUserTime += statUserTime;
        mCurStepStatSystemTime += statSystemTime;
        mCurStepStatIOWaitTime += statIOWaitTime;
        mCurStepStatIrqTime += statIrqTime;
        mCurStepStatSoftIrqTime += statSoftIrqTime;
        mCurStepStatIdleTime += statIdleTime;
    }

    public void noteProcessDiedLocked(int uid, int pid) {
        uid = mapUid(uid);
        Uid u = mUidStats.get(uid);
        if (u != null) {
            u.mPids.remove(pid);
        }
    }

    public long getProcessWakeTime(int uid, int pid, long realtime) {
        uid = mapUid(uid);
        Uid u = mUidStats.get(uid);
        if (u != null) {
            Uid.Pid p = u.mPids.get(pid);
            if (p != null) {
                return p.mWakeSumMs + (p.mWakeNesting > 0 ? (realtime - p.mWakeStartMs) : 0);
            }
        }
        return 0;
    }

    public void reportExcessiveWakeLocked(int uid, String proc, long overTime, long usedTime) {
        uid = mapUid(uid);
        Uid u = mUidStats.get(uid);
        if (u != null) {
            u.reportExcessiveWakeLocked(proc, overTime, usedTime);
        }
    }

    public void reportExcessiveCpuLocked(int uid, String proc, long overTime, long usedTime) {
        uid = mapUid(uid);
        Uid u = mUidStats.get(uid);
        if (u != null) {
            u.reportExcessiveCpuLocked(proc, overTime, usedTime);
        }
    }

    int mSensorNesting;

    public void noteStartSensorLocked(int uid, int sensor) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mSensorNesting == 0) {
            mHistoryCur.states |= HistoryItem.STATE_SENSOR_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Start sensor to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        mSensorNesting++;
        getUidStatsLocked(uid).noteStartSensor(sensor, elapsedRealtime);
    }

    public void noteStopSensorLocked(int uid, int sensor) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        mSensorNesting--;
        if (mSensorNesting == 0) {
            mHistoryCur.states &= ~HistoryItem.STATE_SENSOR_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Stop sensor to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        getUidStatsLocked(uid).noteStopSensor(sensor, elapsedRealtime);
    }

    int mGpsNesting;

    public void noteStartGpsLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mGpsNesting == 0) {
            mHistoryCur.states |= HistoryItem.STATE_GPS_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Start GPS to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        mGpsNesting++;
        getUidStatsLocked(uid).noteStartGps(elapsedRealtime);
    }

    public void noteStopGpsLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        mGpsNesting--;
        if (mGpsNesting == 0) {
            mHistoryCur.states &= ~HistoryItem.STATE_GPS_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Stop GPS to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        getUidStatsLocked(uid).noteStopGps(elapsedRealtime);
    }

    public void noteScreenStateLocked(int state) {
        if (mScreenState != state) {
            recordDailyStatsIfNeededLocked(true);
            final int oldState = mScreenState;
            mScreenState = state;
            if (DEBUG) Slog.v(TAG, "Screen state: oldState=" + Display.stateToString(oldState)
                    + ", newState=" + Display.stateToString(state));

            if (state != Display.STATE_UNKNOWN) {
                int stepState = state-1;
                if (stepState < 4) {
                    mModStepMode |= (mCurStepMode&STEP_LEVEL_MODE_SCREEN_STATE) ^ stepState;
                    mCurStepMode = (mCurStepMode&~STEP_LEVEL_MODE_SCREEN_STATE) | stepState;
                } else {
                    Slog.wtf(TAG, "Unexpected screen state: " + state);
                }
            }

            if (state == Display.STATE_ON) {
                // Screen turning on.
                final long elapsedRealtime = SystemClock.elapsedRealtime();
                final long uptime = SystemClock.uptimeMillis();
                mHistoryCur.states |= HistoryItem.STATE_SCREEN_ON_FLAG;
                if (DEBUG_HISTORY) Slog.v(TAG, "Screen on to: "
                        + Integer.toHexString(mHistoryCur.states));
                addHistoryRecordLocked(elapsedRealtime, uptime);
                mScreenOnTimer.startRunningLocked(elapsedRealtime);
                if (mScreenBrightnessBin >= 0) {
                    mScreenBrightnessTimer[mScreenBrightnessBin].startRunningLocked(elapsedRealtime);
                }

                updateTimeBasesLocked(mOnBatteryTimeBase.isRunning(), false,
                        SystemClock.uptimeMillis() * 1000, elapsedRealtime * 1000);

                // Fake a wake lock, so we consider the device waked as long
                // as the screen is on.
                noteStartWakeLocked(-1, -1, "screen", null, WAKE_TYPE_PARTIAL, false,
                        elapsedRealtime, uptime);

                // Update discharge amounts.
                if (mOnBatteryInternal) {
                    updateDischargeScreenLevelsLocked(false, true);
                }
            } else if (oldState == Display.STATE_ON) {
                // Screen turning off or dozing.
                final long elapsedRealtime = SystemClock.elapsedRealtime();
                final long uptime = SystemClock.uptimeMillis();
                mHistoryCur.states &= ~HistoryItem.STATE_SCREEN_ON_FLAG;
                if (DEBUG_HISTORY) Slog.v(TAG, "Screen off to: "
                        + Integer.toHexString(mHistoryCur.states));
                addHistoryRecordLocked(elapsedRealtime, uptime);
                mScreenOnTimer.stopRunningLocked(elapsedRealtime);
                if (mScreenBrightnessBin >= 0) {
                    mScreenBrightnessTimer[mScreenBrightnessBin].stopRunningLocked(elapsedRealtime);
                }

                noteStopWakeLocked(-1, -1, "screen", "screen", WAKE_TYPE_PARTIAL,
                        elapsedRealtime, uptime);

                updateTimeBasesLocked(mOnBatteryTimeBase.isRunning(), true,
                        SystemClock.uptimeMillis() * 1000, elapsedRealtime * 1000);

                // Update discharge amounts.
                if (mOnBatteryInternal) {
                    updateDischargeScreenLevelsLocked(true, false);
                }
            }
        }
    }

    public void noteScreenBrightnessLocked(int brightness) {
        // Bin the brightness.
        int bin = brightness / (256/NUM_SCREEN_BRIGHTNESS_BINS);
        if (bin < 0) bin = 0;
        else if (bin >= NUM_SCREEN_BRIGHTNESS_BINS) bin = NUM_SCREEN_BRIGHTNESS_BINS-1;
        if (mScreenBrightnessBin != bin) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mHistoryCur.states = (mHistoryCur.states&~HistoryItem.STATE_BRIGHTNESS_MASK)
                    | (bin << HistoryItem.STATE_BRIGHTNESS_SHIFT);
            if (DEBUG_HISTORY) Slog.v(TAG, "Screen brightness " + bin + " to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            if (mScreenState == Display.STATE_ON) {
                if (mScreenBrightnessBin >= 0) {
                    mScreenBrightnessTimer[mScreenBrightnessBin].stopRunningLocked(elapsedRealtime);
                }
                mScreenBrightnessTimer[bin].startRunningLocked(elapsedRealtime);
            }
            mScreenBrightnessBin = bin;
        }
    }

    public void noteUserActivityLocked(int uid, int event) {
        if (mOnBatteryInternal) {
            uid = mapUid(uid);
            getUidStatsLocked(uid).noteUserActivityLocked(event);
        }
    }

    public void noteWakeUpLocked(String reason, int reasonUid) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_SCREEN_WAKE_UP,
                reason, reasonUid);
    }

    public void noteInteractiveLocked(boolean interactive) {
        if (mInteractive != interactive) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            mInteractive = interactive;
            if (DEBUG) Slog.v(TAG, "Interactive: " + interactive);
            if (interactive) {
                mInteractiveTimer.startRunningLocked(elapsedRealtime);
            } else {
                mInteractiveTimer.stopRunningLocked(elapsedRealtime);
            }
        }
    }

    public void noteConnectivityChangedLocked(int type, String extra) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_CONNECTIVITY_CHANGED,
                extra, type);
        mNumConnectivityChange++;
    }

    public void noteMobileRadioPowerState(int powerState, long timestampNs) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mMobileRadioPowerState != powerState) {
            long realElapsedRealtimeMs;
            final boolean active =
                    powerState == DataConnectionRealTimeInfo.DC_POWER_STATE_MEDIUM
                            || powerState == DataConnectionRealTimeInfo.DC_POWER_STATE_HIGH;
            if (active) {
                mMobileRadioActiveStartTime = realElapsedRealtimeMs = elapsedRealtime;
                mHistoryCur.states |= HistoryItem.STATE_MOBILE_RADIO_ACTIVE_FLAG;
            } else {
                realElapsedRealtimeMs = timestampNs / (1000*1000);
                long lastUpdateTimeMs = mMobileRadioActiveStartTime;
                if (realElapsedRealtimeMs < lastUpdateTimeMs) {
                    Slog.wtf(TAG, "Data connection inactive timestamp " + realElapsedRealtimeMs
                            + " is before start time " + lastUpdateTimeMs);
                    realElapsedRealtimeMs = elapsedRealtime;
                } else if (realElapsedRealtimeMs < elapsedRealtime) {
                    mMobileRadioActiveAdjustedTime.addCountLocked(elapsedRealtime
                            - realElapsedRealtimeMs);
                }
                mHistoryCur.states &= ~HistoryItem.STATE_MOBILE_RADIO_ACTIVE_FLAG;
            }
            if (DEBUG_HISTORY) Slog.v(TAG, "Mobile network active " + active + " to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mMobileRadioPowerState = powerState;
            if (active) {
                mMobileRadioActiveTimer.startRunningLocked(elapsedRealtime);
                mMobileRadioActivePerAppTimer.startRunningLocked(elapsedRealtime);
            } else {
                mMobileRadioActiveTimer.stopRunningLocked(realElapsedRealtimeMs);
                updateMobileRadioStateLocked(realElapsedRealtimeMs, null);
                mMobileRadioActivePerAppTimer.stopRunningLocked(realElapsedRealtimeMs);
            }
        }
    }

    public void notePowerSaveMode(boolean enabled) {
        if (mPowerSaveModeEnabled != enabled) {
            int stepState = enabled ? STEP_LEVEL_MODE_POWER_SAVE : 0;
            mModStepMode |= (mCurStepMode&STEP_LEVEL_MODE_POWER_SAVE) ^ stepState;
            mCurStepMode = (mCurStepMode&~STEP_LEVEL_MODE_POWER_SAVE) | stepState;
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mPowerSaveModeEnabled = enabled;
            if (enabled) {
                mHistoryCur.states2 |= HistoryItem.STATE2_POWER_SAVE_FLAG;
                if (DEBUG_HISTORY) Slog.v(TAG, "Power save mode enabled to: "
                        + Integer.toHexString(mHistoryCur.states2));
                mPowerSaveModeEnabledTimer.startRunningLocked(elapsedRealtime);
            } else {
                mHistoryCur.states2 &= ~HistoryItem.STATE2_POWER_SAVE_FLAG;
                if (DEBUG_HISTORY) Slog.v(TAG, "Power save mode disabled to: "
                        + Integer.toHexString(mHistoryCur.states2));
                mPowerSaveModeEnabledTimer.stopRunningLocked(elapsedRealtime);
            }
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
    }

    public void noteDeviceIdleModeLocked(int mode, String activeReason, int activeUid) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        boolean nowIdling = mode == DEVICE_IDLE_MODE_FULL;
        if (mDeviceIdling && !nowIdling && activeReason == null) {
            // We don't go out of general idling mode until explicitly taken out of
            // device idle through going active or significant motion.
            nowIdling = true;
        }
        boolean nowLightIdling = mode == DEVICE_IDLE_MODE_LIGHT;
        if (mDeviceLightIdling && !nowLightIdling && !nowIdling && activeReason == null) {
            // We don't go out of general light idling mode until explicitly taken out of
            // device idle through going active or significant motion.
            nowLightIdling = true;
        }
        if (activeReason != null && (mDeviceIdling || mDeviceLightIdling)) {
            addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_ACTIVE,
                    activeReason, activeUid);
        }
        if (mDeviceIdling != nowIdling) {
            mDeviceIdling = nowIdling;
            int stepState = nowIdling ? STEP_LEVEL_MODE_DEVICE_IDLE : 0;
            mModStepMode |= (mCurStepMode&STEP_LEVEL_MODE_DEVICE_IDLE) ^ stepState;
            mCurStepMode = (mCurStepMode&~STEP_LEVEL_MODE_DEVICE_IDLE) | stepState;
            if (nowIdling) {
                mDeviceIdlingTimer.startRunningLocked(elapsedRealtime);
            } else {
                mDeviceIdlingTimer.stopRunningLocked(elapsedRealtime);
            }
        }
        if (mDeviceLightIdling != nowLightIdling) {
            mDeviceLightIdling = nowLightIdling;
            if (nowLightIdling) {
                mDeviceLightIdlingTimer.startRunningLocked(elapsedRealtime);
            } else {
                mDeviceLightIdlingTimer.stopRunningLocked(elapsedRealtime);
            }
        }
        if (mDeviceIdleMode != mode) {
            mHistoryCur.states2 = (mHistoryCur.states2 & ~HistoryItem.STATE2_DEVICE_IDLE_MASK)
                    | (mode << HistoryItem.STATE2_DEVICE_IDLE_SHIFT);
            if (DEBUG_HISTORY) Slog.v(TAG, "Device idle mode changed to: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            long lastDuration = elapsedRealtime - mLastIdleTimeStart;
            mLastIdleTimeStart = elapsedRealtime;
            if (mDeviceIdleMode == DEVICE_IDLE_MODE_LIGHT) {
                if (lastDuration > mLongestLightIdleTime) {
                    mLongestLightIdleTime = lastDuration;
                }
                mDeviceIdleModeLightTimer.stopRunningLocked(elapsedRealtime);
            } else if (mDeviceIdleMode == DEVICE_IDLE_MODE_FULL) {
                if (lastDuration > mLongestFullIdleTime) {
                    mLongestFullIdleTime = lastDuration;
                }
                mDeviceIdleModeFullTimer.stopRunningLocked(elapsedRealtime);
            }
            if (mode == DEVICE_IDLE_MODE_LIGHT) {
                mDeviceIdleModeLightTimer.startRunningLocked(elapsedRealtime);
            } else if (mode == DEVICE_IDLE_MODE_FULL) {
                mDeviceIdleModeFullTimer.startRunningLocked(elapsedRealtime);
            }
            mDeviceIdleMode = mode;
        }
    }

    public void notePackageInstalledLocked(String pkgName, int versionCode) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_PACKAGE_INSTALLED,
                pkgName, versionCode);
        PackageChange pc = new PackageChange();
        pc.mPackageName = pkgName;
        pc.mUpdate = true;
        pc.mVersionCode = versionCode;
        addPackageChange(pc);
    }

    public void notePackageUninstalledLocked(String pkgName) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        addHistoryEventLocked(elapsedRealtime, uptime, HistoryItem.EVENT_PACKAGE_UNINSTALLED,
                pkgName, 0);
        PackageChange pc = new PackageChange();
        pc.mPackageName = pkgName;
        pc.mUpdate = true;
        addPackageChange(pc);
    }

    private void addPackageChange(PackageChange pc) {
        if (mDailyPackageChanges == null) {
            mDailyPackageChanges = new ArrayList<>();
        }
        mDailyPackageChanges.add(pc);
    }

    public void notePhoneOnLocked() {
        if (!mPhoneOn) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mHistoryCur.states2 |= HistoryItem.STATE2_PHONE_IN_CALL_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Phone on to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mPhoneOn = true;
            mPhoneOnTimer.startRunningLocked(elapsedRealtime);
        }
    }

    public void notePhoneOffLocked() {
        if (mPhoneOn) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mHistoryCur.states2 &= ~HistoryItem.STATE2_PHONE_IN_CALL_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Phone off to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mPhoneOn = false;
            mPhoneOnTimer.stopRunningLocked(elapsedRealtime);
        }
    }

    void stopAllPhoneSignalStrengthTimersLocked(int except) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        for (int i = 0; i < SignalStrength.NUM_SIGNAL_STRENGTH_BINS; i++) {
            if (i == except) {
                continue;
            }
            while (mPhoneSignalStrengthsTimer[i].isRunningLocked()) {
                mPhoneSignalStrengthsTimer[i].stopRunningLocked(elapsedRealtime);
            }
        }
    }

    private int fixPhoneServiceState(int state, int signalBin) {
        if (mPhoneSimStateRaw == TelephonyManager.SIM_STATE_ABSENT) {
            // In this case we will always be STATE_OUT_OF_SERVICE, so need
            // to infer that we are scanning from other data.
            if (state == ServiceState.STATE_OUT_OF_SERVICE
                    && signalBin > SignalStrength.SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {
                state = ServiceState.STATE_IN_SERVICE;
            }
        }

        return state;
    }

    private void updateAllPhoneStateLocked(int state, int simState, int strengthBin) {
        boolean scanning = false;
        boolean newHistory = false;

        mPhoneServiceStateRaw = state;
        mPhoneSimStateRaw = simState;
        mPhoneSignalStrengthBinRaw = strengthBin;

        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();

        if (simState == TelephonyManager.SIM_STATE_ABSENT) {
            // In this case we will always be STATE_OUT_OF_SERVICE, so need
            // to infer that we are scanning from other data.
            if (state == ServiceState.STATE_OUT_OF_SERVICE
                    && strengthBin > SignalStrength.SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {
                state = ServiceState.STATE_IN_SERVICE;
            }
        }

        // If the phone is powered off, stop all timers.
        if (state == ServiceState.STATE_POWER_OFF) {
            strengthBin = -1;

        // If we are in service, make sure the correct signal string timer is running.
        } else if (state == ServiceState.STATE_IN_SERVICE) {
            // Bin will be changed below.

        // If we're out of service, we are in the lowest signal strength
        // bin and have the scanning bit set.
        } else if (state == ServiceState.STATE_OUT_OF_SERVICE) {
            scanning = true;
            strengthBin = SignalStrength.SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
            if (!mPhoneSignalScanningTimer.isRunningLocked()) {
                mHistoryCur.states |= HistoryItem.STATE_PHONE_SCANNING_FLAG;
                newHistory = true;
                if (DEBUG_HISTORY) Slog.v(TAG, "Phone started scanning to: "
                        + Integer.toHexString(mHistoryCur.states));
                mPhoneSignalScanningTimer.startRunningLocked(elapsedRealtime);
            }
        }

        if (!scanning) {
            // If we are no longer scanning, then stop the scanning timer.
            if (mPhoneSignalScanningTimer.isRunningLocked()) {
                mHistoryCur.states &= ~HistoryItem.STATE_PHONE_SCANNING_FLAG;
                if (DEBUG_HISTORY) Slog.v(TAG, "Phone stopped scanning to: "
                        + Integer.toHexString(mHistoryCur.states));
                newHistory = true;
                mPhoneSignalScanningTimer.stopRunningLocked(elapsedRealtime);
            }
        }

        if (mPhoneServiceState != state) {
            mHistoryCur.states = (mHistoryCur.states&~HistoryItem.STATE_PHONE_STATE_MASK)
                    | (state << HistoryItem.STATE_PHONE_STATE_SHIFT);
            if (DEBUG_HISTORY) Slog.v(TAG, "Phone state " + state + " to: "
                    + Integer.toHexString(mHistoryCur.states));
            newHistory = true;
            mPhoneServiceState = state;
        }

        if (mPhoneSignalStrengthBin != strengthBin) {
            if (mPhoneSignalStrengthBin >= 0) {
                mPhoneSignalStrengthsTimer[mPhoneSignalStrengthBin].stopRunningLocked(
                        elapsedRealtime);
            }
            if (strengthBin >= 0) {
                if (!mPhoneSignalStrengthsTimer[strengthBin].isRunningLocked()) {
                    mPhoneSignalStrengthsTimer[strengthBin].startRunningLocked(elapsedRealtime);
                }
                mHistoryCur.states = (mHistoryCur.states&~HistoryItem.STATE_PHONE_SIGNAL_STRENGTH_MASK)
                        | (strengthBin << HistoryItem.STATE_PHONE_SIGNAL_STRENGTH_SHIFT);
                if (DEBUG_HISTORY) Slog.v(TAG, "Signal strength " + strengthBin + " to: "
                        + Integer.toHexString(mHistoryCur.states));
                newHistory = true;
            } else {
                stopAllPhoneSignalStrengthTimersLocked(-1);
            }
            mPhoneSignalStrengthBin = strengthBin;
        }

        if (newHistory) {
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
    }

    /**
     * Telephony stack updates the phone state.
     * @param state phone state from ServiceState.getState()
     */
    public void notePhoneStateLocked(int state, int simState) {
        updateAllPhoneStateLocked(state, simState, mPhoneSignalStrengthBinRaw);
    }

    public void notePhoneSignalStrengthLocked(SignalStrength signalStrength) {
        // Bin the strength.
        int bin = signalStrength.getLevel();
        updateAllPhoneStateLocked(mPhoneServiceStateRaw, mPhoneSimStateRaw, bin);
    }

    public void notePhoneDataConnectionStateLocked(int dataType, boolean hasData) {
        int bin = DATA_CONNECTION_NONE;
        if (hasData) {
            switch (dataType) {
                case TelephonyManager.NETWORK_TYPE_EDGE:
                    bin = DATA_CONNECTION_EDGE;
                    break;
                case TelephonyManager.NETWORK_TYPE_GPRS:
                    bin = DATA_CONNECTION_GPRS;
                    break;
                case TelephonyManager.NETWORK_TYPE_UMTS:
                    bin = DATA_CONNECTION_UMTS;
                    break;
                case TelephonyManager.NETWORK_TYPE_CDMA:
                    bin = DATA_CONNECTION_CDMA;
                    break;
                case TelephonyManager.NETWORK_TYPE_EVDO_0:
                    bin = DATA_CONNECTION_EVDO_0;
                    break;
                case TelephonyManager.NETWORK_TYPE_EVDO_A:
                    bin = DATA_CONNECTION_EVDO_A;
                    break;
                case TelephonyManager.NETWORK_TYPE_1xRTT:
                    bin = DATA_CONNECTION_1xRTT;
                    break;
                case TelephonyManager.NETWORK_TYPE_HSDPA:
                    bin = DATA_CONNECTION_HSDPA;
                    break;
                case TelephonyManager.NETWORK_TYPE_HSUPA:
                    bin = DATA_CONNECTION_HSUPA;
                    break;
                case TelephonyManager.NETWORK_TYPE_HSPA:
                    bin = DATA_CONNECTION_HSPA;
                    break;
                case TelephonyManager.NETWORK_TYPE_IDEN:
                    bin = DATA_CONNECTION_IDEN;
                    break;
                case TelephonyManager.NETWORK_TYPE_EVDO_B:
                    bin = DATA_CONNECTION_EVDO_B;
                    break;
                case TelephonyManager.NETWORK_TYPE_LTE:
                    bin = DATA_CONNECTION_LTE;
                    break;
                case TelephonyManager.NETWORK_TYPE_EHRPD:
                    bin = DATA_CONNECTION_EHRPD;
                    break;
                case TelephonyManager.NETWORK_TYPE_HSPAP:
                    bin = DATA_CONNECTION_HSPAP;
                    break;
                default:
                    bin = DATA_CONNECTION_OTHER;
                    break;
            }
        }
        if (DEBUG) Log.i(TAG, "Phone Data Connection -> " + dataType + " = " + hasData);
        if (mPhoneDataConnectionType != bin) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mHistoryCur.states = (mHistoryCur.states&~HistoryItem.STATE_DATA_CONNECTION_MASK)
                    | (bin << HistoryItem.STATE_DATA_CONNECTION_SHIFT);
            if (DEBUG_HISTORY) Slog.v(TAG, "Data connection " + bin + " to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            if (mPhoneDataConnectionType >= 0) {
                mPhoneDataConnectionsTimer[mPhoneDataConnectionType].stopRunningLocked(
                        elapsedRealtime);
            }
            mPhoneDataConnectionType = bin;
            mPhoneDataConnectionsTimer[bin].startRunningLocked(elapsedRealtime);
        }
    }

    public void noteWifiOnLocked() {
        if (!mWifiOn) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mHistoryCur.states2 |= HistoryItem.STATE2_WIFI_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI on to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mWifiOn = true;
            mWifiOnTimer.startRunningLocked(elapsedRealtime);
            scheduleSyncExternalStatsLocked("wifi-off", ExternalStatsSync.UPDATE_WIFI);
        }
    }

    public void noteWifiOffLocked() {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mWifiOn) {
            mHistoryCur.states2 &= ~HistoryItem.STATE2_WIFI_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI off to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mWifiOn = false;
            mWifiOnTimer.stopRunningLocked(elapsedRealtime);
            scheduleSyncExternalStatsLocked("wifi-on", ExternalStatsSync.UPDATE_WIFI);
        }
    }

    public void noteAudioOnLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mAudioOnNesting == 0) {
            mHistoryCur.states |= HistoryItem.STATE_AUDIO_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Audio on to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mAudioOnTimer.startRunningLocked(elapsedRealtime);
        }
        mAudioOnNesting++;
        getUidStatsLocked(uid).noteAudioTurnedOnLocked(elapsedRealtime);
    }

    public void noteAudioOffLocked(int uid) {
        if (mAudioOnNesting == 0) {
            return;
        }
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (--mAudioOnNesting == 0) {
            mHistoryCur.states &= ~HistoryItem.STATE_AUDIO_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Audio off to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mAudioOnTimer.stopRunningLocked(elapsedRealtime);
        }
        getUidStatsLocked(uid).noteAudioTurnedOffLocked(elapsedRealtime);
    }

    public void noteVideoOnLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mVideoOnNesting == 0) {
            mHistoryCur.states2 |= HistoryItem.STATE2_VIDEO_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Video on to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mVideoOnTimer.startRunningLocked(elapsedRealtime);
        }
        mVideoOnNesting++;
        getUidStatsLocked(uid).noteVideoTurnedOnLocked(elapsedRealtime);
    }

    public void noteVideoOffLocked(int uid) {
        if (mVideoOnNesting == 0) {
            return;
        }
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (--mVideoOnNesting == 0) {
            mHistoryCur.states2 &= ~HistoryItem.STATE2_VIDEO_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Video off to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mVideoOnTimer.stopRunningLocked(elapsedRealtime);
        }
        getUidStatsLocked(uid).noteVideoTurnedOffLocked(elapsedRealtime);
    }

    public void noteResetAudioLocked() {
        if (mAudioOnNesting > 0) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mAudioOnNesting = 0;
            mHistoryCur.states &= ~HistoryItem.STATE_AUDIO_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Audio off to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mAudioOnTimer.stopAllRunningLocked(elapsedRealtime);
            for (int i=0; i<mUidStats.size(); i++) {
                BatteryStatsImpl.Uid uid = mUidStats.valueAt(i);
                uid.noteResetAudioLocked(elapsedRealtime);
            }
        }
    }

    public void noteResetVideoLocked() {
        if (mVideoOnNesting > 0) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mAudioOnNesting = 0;
            mHistoryCur.states2 &= ~HistoryItem.STATE2_VIDEO_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Video off to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mVideoOnTimer.stopAllRunningLocked(elapsedRealtime);
            for (int i=0; i<mUidStats.size(); i++) {
                BatteryStatsImpl.Uid uid = mUidStats.valueAt(i);
                uid.noteResetVideoLocked(elapsedRealtime);
            }
        }
    }

    public void noteActivityResumedLocked(int uid) {
        uid = mapUid(uid);
        getUidStatsLocked(uid).noteActivityResumedLocked(SystemClock.elapsedRealtime());
    }

    public void noteActivityPausedLocked(int uid) {
        uid = mapUid(uid);
        getUidStatsLocked(uid).noteActivityPausedLocked(SystemClock.elapsedRealtime());
    }

    public void noteVibratorOnLocked(int uid, long durationMillis) {
        uid = mapUid(uid);
        getUidStatsLocked(uid).noteVibratorOnLocked(durationMillis);
    }

    public void noteVibratorOffLocked(int uid) {
        uid = mapUid(uid);
        getUidStatsLocked(uid).noteVibratorOffLocked();
    }

    public void noteFlashlightOnLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mFlashlightOnNesting++ == 0) {
            mHistoryCur.states2 |= HistoryItem.STATE2_FLASHLIGHT_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Flashlight on to: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mFlashlightOnTimer.startRunningLocked(elapsedRealtime);
        }
        getUidStatsLocked(uid).noteFlashlightTurnedOnLocked(elapsedRealtime);
    }

    public void noteFlashlightOffLocked(int uid) {
        if (mFlashlightOnNesting == 0) {
            return;
        }
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (--mFlashlightOnNesting == 0) {
            mHistoryCur.states2 &= ~HistoryItem.STATE2_FLASHLIGHT_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Flashlight off to: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mFlashlightOnTimer.stopRunningLocked(elapsedRealtime);
        }
        getUidStatsLocked(uid).noteFlashlightTurnedOffLocked(elapsedRealtime);
    }

    public void noteCameraOnLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mCameraOnNesting++ == 0) {
            mHistoryCur.states2 |= HistoryItem.STATE2_CAMERA_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Camera on to: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mCameraOnTimer.startRunningLocked(elapsedRealtime);
        }
        getUidStatsLocked(uid).noteCameraTurnedOnLocked(elapsedRealtime);
    }

    public void noteCameraOffLocked(int uid) {
        if (mCameraOnNesting == 0) {
            return;
        }
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (--mCameraOnNesting == 0) {
            mHistoryCur.states2 &= ~HistoryItem.STATE2_CAMERA_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Camera off to: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mCameraOnTimer.stopRunningLocked(elapsedRealtime);
        }
        getUidStatsLocked(uid).noteCameraTurnedOffLocked(elapsedRealtime);
    }

    public void noteResetCameraLocked() {
        if (mCameraOnNesting > 0) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mCameraOnNesting = 0;
            mHistoryCur.states2 &= ~HistoryItem.STATE2_CAMERA_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Camera off to: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mCameraOnTimer.stopAllRunningLocked(elapsedRealtime);
            for (int i=0; i<mUidStats.size(); i++) {
                BatteryStatsImpl.Uid uid = mUidStats.valueAt(i);
                uid.noteResetCameraLocked(elapsedRealtime);
            }
        }
    }

    public void noteResetFlashlightLocked() {
        if (mFlashlightOnNesting > 0) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mFlashlightOnNesting = 0;
            mHistoryCur.states2 &= ~HistoryItem.STATE2_FLASHLIGHT_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Flashlight off to: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mFlashlightOnTimer.stopAllRunningLocked(elapsedRealtime);
            for (int i=0; i<mUidStats.size(); i++) {
                BatteryStatsImpl.Uid uid = mUidStats.valueAt(i);
                uid.noteResetFlashlightLocked(elapsedRealtime);
            }
        }
    }

    private void noteBluetoothScanStartedLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mBluetoothScanNesting == 0) {
            mHistoryCur.states2 |= HistoryItem.STATE2_BLUETOOTH_SCAN_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "BLE scan started for: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        mBluetoothScanNesting++;
        getUidStatsLocked(uid).noteBluetoothScanStartedLocked(elapsedRealtime);
    }

    public void noteBluetoothScanStartedFromSourceLocked(WorkSource ws) {
        final int N = ws.size();
        for (int i = 0; i < N; i++) {
            noteBluetoothScanStartedLocked(ws.get(i));
        }
    }

    private void noteBluetoothScanStoppedLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        mBluetoothScanNesting--;
        if (mBluetoothScanNesting == 0) {
            mHistoryCur.states2 &= ~HistoryItem.STATE2_BLUETOOTH_SCAN_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "BLE scan stopped for: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        getUidStatsLocked(uid).noteBluetoothScanStoppedLocked(elapsedRealtime);
    }

    public void noteBluetoothScanStoppedFromSourceLocked(WorkSource ws) {
        final int N = ws.size();
        for (int i = 0; i < N; i++) {
            noteBluetoothScanStoppedLocked(ws.get(i));
        }
    }

    public void noteResetBluetoothScanLocked() {
        if (mBluetoothScanNesting > 0) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mBluetoothScanNesting = 0;
            mHistoryCur.states2 &= ~HistoryItem.STATE2_BLUETOOTH_SCAN_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "BLE can stopped for: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mBluetoothScanTimer.stopAllRunningLocked(elapsedRealtime);
            for (int i=0; i<mUidStats.size(); i++) {
                BatteryStatsImpl.Uid uid = mUidStats.valueAt(i);
                uid.noteResetBluetoothScanLocked(elapsedRealtime);
            }
        }
    }

    public void noteWifiRadioPowerState(int powerState, long timestampNs) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mWifiRadioPowerState != powerState) {
            final boolean active =
                    powerState == DataConnectionRealTimeInfo.DC_POWER_STATE_MEDIUM
                            || powerState == DataConnectionRealTimeInfo.DC_POWER_STATE_HIGH;
            if (active) {
                mHistoryCur.states |= HistoryItem.STATE_WIFI_RADIO_ACTIVE_FLAG;
            } else {
                mHistoryCur.states &= ~HistoryItem.STATE_WIFI_RADIO_ACTIVE_FLAG;
            }
            if (DEBUG_HISTORY) Slog.v(TAG, "Wifi network active " + active + " to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mWifiRadioPowerState = powerState;
        }
    }

    public void noteWifiRunningLocked(WorkSource ws) {
        if (!mGlobalWifiRunning) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mHistoryCur.states2 |= HistoryItem.STATE2_WIFI_RUNNING_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI running to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mGlobalWifiRunning = true;
            mGlobalWifiRunningTimer.startRunningLocked(elapsedRealtime);
            int N = ws.size();
            for (int i=0; i<N; i++) {
                int uid = mapUid(ws.get(i));
                getUidStatsLocked(uid).noteWifiRunningLocked(elapsedRealtime);
            }
            scheduleSyncExternalStatsLocked("wifi-running", ExternalStatsSync.UPDATE_WIFI);
        } else {
            Log.w(TAG, "noteWifiRunningLocked -- called while WIFI running");
        }
    }

    public void noteWifiRunningChangedLocked(WorkSource oldWs, WorkSource newWs) {
        if (mGlobalWifiRunning) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            int N = oldWs.size();
            for (int i=0; i<N; i++) {
                int uid = mapUid(oldWs.get(i));
                getUidStatsLocked(uid).noteWifiStoppedLocked(elapsedRealtime);
            }
            N = newWs.size();
            for (int i=0; i<N; i++) {
                int uid = mapUid(newWs.get(i));
                getUidStatsLocked(uid).noteWifiRunningLocked(elapsedRealtime);
            }
        } else {
            Log.w(TAG, "noteWifiRunningChangedLocked -- called while WIFI not running");
        }
    }

    public void noteWifiStoppedLocked(WorkSource ws) {
        if (mGlobalWifiRunning) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            mHistoryCur.states2 &= ~HistoryItem.STATE2_WIFI_RUNNING_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI stopped to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
            mGlobalWifiRunning = false;
            mGlobalWifiRunningTimer.stopRunningLocked(elapsedRealtime);
            int N = ws.size();
            for (int i=0; i<N; i++) {
                int uid = mapUid(ws.get(i));
                getUidStatsLocked(uid).noteWifiStoppedLocked(elapsedRealtime);
            }
            scheduleSyncExternalStatsLocked("wifi-stopped", ExternalStatsSync.UPDATE_WIFI);
        } else {
            Log.w(TAG, "noteWifiStoppedLocked -- called while WIFI not running");
        }
    }

    public void noteWifiStateLocked(int wifiState, String accessPoint) {
        if (DEBUG) Log.i(TAG, "WiFi state -> " + wifiState);
        if (mWifiState != wifiState) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            if (mWifiState >= 0) {
                mWifiStateTimer[mWifiState].stopRunningLocked(elapsedRealtime);
            }
            mWifiState = wifiState;
            mWifiStateTimer[wifiState].startRunningLocked(elapsedRealtime);
            scheduleSyncExternalStatsLocked("wifi-state", ExternalStatsSync.UPDATE_WIFI);
        }
    }

    public void noteWifiSupplicantStateChangedLocked(int supplState, boolean failedAuth) {
        if (DEBUG) Log.i(TAG, "WiFi suppl state -> " + supplState);
        if (mWifiSupplState != supplState) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            if (mWifiSupplState >= 0) {
                mWifiSupplStateTimer[mWifiSupplState].stopRunningLocked(elapsedRealtime);
            }
            mWifiSupplState = supplState;
            mWifiSupplStateTimer[supplState].startRunningLocked(elapsedRealtime);
            mHistoryCur.states2 =
                    (mHistoryCur.states2&~HistoryItem.STATE2_WIFI_SUPPL_STATE_MASK)
                    | (supplState << HistoryItem.STATE2_WIFI_SUPPL_STATE_SHIFT);
            if (DEBUG_HISTORY) Slog.v(TAG, "Wifi suppl state " + supplState + " to: "
                    + Integer.toHexString(mHistoryCur.states2));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
    }

    void stopAllWifiSignalStrengthTimersLocked(int except) {
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        for (int i = 0; i < NUM_WIFI_SIGNAL_STRENGTH_BINS; i++) {
            if (i == except) {
                continue;
            }
            while (mWifiSignalStrengthsTimer[i].isRunningLocked()) {
                mWifiSignalStrengthsTimer[i].stopRunningLocked(elapsedRealtime);
            }
        }
    }

    public void noteWifiRssiChangedLocked(int newRssi) {
        int strengthBin = WifiManager.calculateSignalLevel(newRssi, NUM_WIFI_SIGNAL_STRENGTH_BINS);
        if (DEBUG) Log.i(TAG, "WiFi rssi -> " + newRssi + " bin=" + strengthBin);
        if (mWifiSignalStrengthBin != strengthBin) {
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            if (mWifiSignalStrengthBin >= 0) {
                mWifiSignalStrengthsTimer[mWifiSignalStrengthBin].stopRunningLocked(
                        elapsedRealtime);
            }
            if (strengthBin >= 0) {
                if (!mWifiSignalStrengthsTimer[strengthBin].isRunningLocked()) {
                    mWifiSignalStrengthsTimer[strengthBin].startRunningLocked(elapsedRealtime);
                }
                mHistoryCur.states2 =
                        (mHistoryCur.states2&~HistoryItem.STATE2_WIFI_SIGNAL_STRENGTH_MASK)
                        | (strengthBin << HistoryItem.STATE2_WIFI_SIGNAL_STRENGTH_SHIFT);
                if (DEBUG_HISTORY) Slog.v(TAG, "Wifi signal strength " + strengthBin + " to: "
                        + Integer.toHexString(mHistoryCur.states2));
                addHistoryRecordLocked(elapsedRealtime, uptime);
            } else {
                stopAllWifiSignalStrengthTimersLocked(-1);
            }
            mWifiSignalStrengthBin = strengthBin;
        }
    }

    int mWifiFullLockNesting = 0;

    public void noteFullWifiLockAcquiredLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mWifiFullLockNesting == 0) {
            mHistoryCur.states |= HistoryItem.STATE_WIFI_FULL_LOCK_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI full lock on to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        mWifiFullLockNesting++;
        getUidStatsLocked(uid).noteFullWifiLockAcquiredLocked(elapsedRealtime);
    }

    public void noteFullWifiLockReleasedLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        mWifiFullLockNesting--;
        if (mWifiFullLockNesting == 0) {
            mHistoryCur.states &= ~HistoryItem.STATE_WIFI_FULL_LOCK_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI full lock off to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        getUidStatsLocked(uid).noteFullWifiLockReleasedLocked(elapsedRealtime);
    }

    int mWifiScanNesting = 0;

    public void noteWifiScanStartedLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mWifiScanNesting == 0) {
            mHistoryCur.states |= HistoryItem.STATE_WIFI_SCAN_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI scan started for: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        mWifiScanNesting++;
        getUidStatsLocked(uid).noteWifiScanStartedLocked(elapsedRealtime);
    }

    public void noteWifiScanStoppedLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        mWifiScanNesting--;
        if (mWifiScanNesting == 0) {
            mHistoryCur.states &= ~HistoryItem.STATE_WIFI_SCAN_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI scan stopped for: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        getUidStatsLocked(uid).noteWifiScanStoppedLocked(elapsedRealtime);
    }

    public void noteWifiBatchedScanStartedLocked(int uid, int csph) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        getUidStatsLocked(uid).noteWifiBatchedScanStartedLocked(csph, elapsedRealtime);
    }

    public void noteWifiBatchedScanStoppedLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        getUidStatsLocked(uid).noteWifiBatchedScanStoppedLocked(elapsedRealtime);
    }

    int mWifiMulticastNesting = 0;

    public void noteWifiMulticastEnabledLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        if (mWifiMulticastNesting == 0) {
            mHistoryCur.states |= HistoryItem.STATE_WIFI_MULTICAST_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI multicast on to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        mWifiMulticastNesting++;
        getUidStatsLocked(uid).noteWifiMulticastEnabledLocked(elapsedRealtime);
    }

    public void noteWifiMulticastDisabledLocked(int uid) {
        uid = mapUid(uid);
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        final long uptime = SystemClock.uptimeMillis();
        mWifiMulticastNesting--;
        if (mWifiMulticastNesting == 0) {
            mHistoryCur.states &= ~HistoryItem.STATE_WIFI_MULTICAST_ON_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "WIFI multicast off to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(elapsedRealtime, uptime);
        }
        getUidStatsLocked(uid).noteWifiMulticastDisabledLocked(elapsedRealtime);
    }

    public void noteFullWifiLockAcquiredFromSourceLocked(WorkSource ws) {
        int N = ws.size();
        for (int i=0; i<N; i++) {
            noteFullWifiLockAcquiredLocked(ws.get(i));
        }
    }

    public void noteFullWifiLockReleasedFromSourceLocked(WorkSource ws) {
        int N = ws.size();
        for (int i=0; i<N; i++) {
            noteFullWifiLockReleasedLocked(ws.get(i));
        }
    }

    public void noteWifiScanStartedFromSourceLocked(WorkSource ws) {
        int N = ws.size();
        for (int i=0; i<N; i++) {
            noteWifiScanStartedLocked(ws.get(i));
        }
    }

    public void noteWifiScanStoppedFromSourceLocked(WorkSource ws) {
        int N = ws.size();
        for (int i=0; i<N; i++) {
            noteWifiScanStoppedLocked(ws.get(i));
        }
    }

    public void noteWifiBatchedScanStartedFromSourceLocked(WorkSource ws, int csph) {
        int N = ws.size();
        for (int i=0; i<N; i++) {
            noteWifiBatchedScanStartedLocked(ws.get(i), csph);
        }
    }

    public void noteWifiBatchedScanStoppedFromSourceLocked(WorkSource ws) {
        int N = ws.size();
        for (int i=0; i<N; i++) {
            noteWifiBatchedScanStoppedLocked(ws.get(i));
        }
    }

    public void noteWifiMulticastEnabledFromSourceLocked(WorkSource ws) {
        int N = ws.size();
        for (int i=0; i<N; i++) {
            noteWifiMulticastEnabledLocked(ws.get(i));
        }
    }

    public void noteWifiMulticastDisabledFromSourceLocked(WorkSource ws) {
        int N = ws.size();
        for (int i=0; i<N; i++) {
            noteWifiMulticastDisabledLocked(ws.get(i));
        }
    }

    private static String[] includeInStringArray(String[] array, String str) {
        if (ArrayUtils.indexOf(array, str) >= 0) {
            return array;
        }
        String[] newArray = new String[array.length+1];
        System.arraycopy(array, 0, newArray, 0, array.length);
        newArray[array.length] = str;
        return newArray;
    }

    private static String[] excludeFromStringArray(String[] array, String str) {
        int index = ArrayUtils.indexOf(array, str);
        if (index >= 0) {
            String[] newArray = new String[array.length-1];
            if (index > 0) {
                System.arraycopy(array, 0, newArray, 0, index);
            }
            if (index < array.length-1) {
                System.arraycopy(array, index+1, newArray, index, array.length-index-1);
            }
            return newArray;
        }
        return array;
    }

    public void noteNetworkInterfaceTypeLocked(String iface, int networkType) {
        if (TextUtils.isEmpty(iface)) return;
        if (ConnectivityManager.isNetworkTypeMobile(networkType)) {
            mMobileIfaces = includeInStringArray(mMobileIfaces, iface);
            if (DEBUG) Slog.d(TAG, "Note mobile iface " + iface + ": " + mMobileIfaces);
        } else {
            mMobileIfaces = excludeFromStringArray(mMobileIfaces, iface);
            if (DEBUG) Slog.d(TAG, "Note non-mobile iface " + iface + ": " + mMobileIfaces);
        }
        if (ConnectivityManager.isNetworkTypeWifi(networkType)) {
            mWifiIfaces = includeInStringArray(mWifiIfaces, iface);
            if (DEBUG) Slog.d(TAG, "Note wifi iface " + iface + ": " + mWifiIfaces);
        } else {
            mWifiIfaces = excludeFromStringArray(mWifiIfaces, iface);
            if (DEBUG) Slog.d(TAG, "Note non-wifi iface " + iface + ": " + mWifiIfaces);
        }
    }

    public void noteNetworkStatsEnabledLocked() {
        // During device boot, qtaguid isn't enabled until after the inital
        // loading of battery stats. Now that they're enabled, take our initial
        // snapshot for future delta calculation.
        updateMobileRadioStateLocked(SystemClock.elapsedRealtime(), null);
        updateWifiStateLocked(null);
    }

    @Override public long getScreenOnTime(long elapsedRealtimeUs, int which) {
        return mScreenOnTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override public int getScreenOnCount(int which) {
        return mScreenOnTimer.getCountLocked(which);
    }

    @Override public long getScreenBrightnessTime(int brightnessBin,
            long elapsedRealtimeUs, int which) {
        return mScreenBrightnessTimer[brightnessBin].getTotalTimeLocked(
                elapsedRealtimeUs, which);
    }

    @Override public long getInteractiveTime(long elapsedRealtimeUs, int which) {
        return mInteractiveTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override public long getPowerSaveModeEnabledTime(long elapsedRealtimeUs, int which) {
        return mPowerSaveModeEnabledTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override public int getPowerSaveModeEnabledCount(int which) {
        return mPowerSaveModeEnabledTimer.getCountLocked(which);
    }

    @Override public long getDeviceIdleModeTime(int mode, long elapsedRealtimeUs,
            int which) {
        switch (mode) {
            case DEVICE_IDLE_MODE_LIGHT:
                return mDeviceIdleModeLightTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
            case DEVICE_IDLE_MODE_FULL:
                return mDeviceIdleModeFullTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
        }
        return 0;
    }

    @Override public int getDeviceIdleModeCount(int mode, int which) {
        switch (mode) {
            case DEVICE_IDLE_MODE_LIGHT:
                return mDeviceIdleModeLightTimer.getCountLocked(which);
            case DEVICE_IDLE_MODE_FULL:
                return mDeviceIdleModeFullTimer.getCountLocked(which);
        }
        return 0;
    }

    @Override public long getLongestDeviceIdleModeTime(int mode) {
        switch (mode) {
            case DEVICE_IDLE_MODE_LIGHT:
                return mLongestLightIdleTime;
            case DEVICE_IDLE_MODE_FULL:
                return mLongestFullIdleTime;
        }
        return 0;
    }

    @Override public long getDeviceIdlingTime(int mode, long elapsedRealtimeUs, int which) {
        switch (mode) {
            case DEVICE_IDLE_MODE_LIGHT:
                return mDeviceLightIdlingTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
            case DEVICE_IDLE_MODE_FULL:
                return mDeviceIdlingTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
        }
        return 0;
    }

    @Override public int getDeviceIdlingCount(int mode, int which) {
        switch (mode) {
            case DEVICE_IDLE_MODE_LIGHT:
                return mDeviceLightIdlingTimer.getCountLocked(which);
            case DEVICE_IDLE_MODE_FULL:
                return mDeviceIdlingTimer.getCountLocked(which);
        }
        return 0;
    }

    @Override public int getNumConnectivityChange(int which) {
        int val = mNumConnectivityChange;
        if (which == STATS_CURRENT) {
            val -= mLoadedNumConnectivityChange;
        } else if (which == STATS_SINCE_UNPLUGGED) {
            val -= mUnpluggedNumConnectivityChange;
        }
        return val;
    }

    @Override public long getPhoneOnTime(long elapsedRealtimeUs, int which) {
        return mPhoneOnTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override public int getPhoneOnCount(int which) {
        return mPhoneOnTimer.getCountLocked(which);
    }

    @Override public long getPhoneSignalStrengthTime(int strengthBin,
            long elapsedRealtimeUs, int which) {
        return mPhoneSignalStrengthsTimer[strengthBin].getTotalTimeLocked(
                elapsedRealtimeUs, which);
    }

    @Override public long getPhoneSignalScanningTime(
            long elapsedRealtimeUs, int which) {
        return mPhoneSignalScanningTimer.getTotalTimeLocked(
                elapsedRealtimeUs, which);
    }

    @Override public int getPhoneSignalStrengthCount(int strengthBin, int which) {
        return mPhoneSignalStrengthsTimer[strengthBin].getCountLocked(which);
    }

    @Override public long getPhoneDataConnectionTime(int dataType,
            long elapsedRealtimeUs, int which) {
        return mPhoneDataConnectionsTimer[dataType].getTotalTimeLocked(
                elapsedRealtimeUs, which);
    }

    @Override public int getPhoneDataConnectionCount(int dataType, int which) {
        return mPhoneDataConnectionsTimer[dataType].getCountLocked(which);
    }

    @Override public long getMobileRadioActiveTime(long elapsedRealtimeUs, int which) {
        return mMobileRadioActiveTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override public int getMobileRadioActiveCount(int which) {
        return mMobileRadioActiveTimer.getCountLocked(which);
    }

    @Override public long getMobileRadioActiveAdjustedTime(int which) {
        return mMobileRadioActiveAdjustedTime.getCountLocked(which);
    }

    @Override public long getMobileRadioActiveUnknownTime(int which) {
        return mMobileRadioActiveUnknownTime.getCountLocked(which);
    }

    @Override public int getMobileRadioActiveUnknownCount(int which) {
        return (int)mMobileRadioActiveUnknownCount.getCountLocked(which);
    }

    @Override public long getWifiOnTime(long elapsedRealtimeUs, int which) {
        return mWifiOnTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override public long getGlobalWifiRunningTime(long elapsedRealtimeUs, int which) {
        return mGlobalWifiRunningTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override public long getWifiStateTime(int wifiState,
            long elapsedRealtimeUs, int which) {
        return mWifiStateTimer[wifiState].getTotalTimeLocked(
                elapsedRealtimeUs, which);
    }

    @Override public int getWifiStateCount(int wifiState, int which) {
        return mWifiStateTimer[wifiState].getCountLocked(which);
    }

    @Override public long getWifiSupplStateTime(int state,
            long elapsedRealtimeUs, int which) {
        return mWifiSupplStateTimer[state].getTotalTimeLocked(
                elapsedRealtimeUs, which);
    }

    @Override public int getWifiSupplStateCount(int state, int which) {
        return mWifiSupplStateTimer[state].getCountLocked(which);
    }

    @Override public long getWifiSignalStrengthTime(int strengthBin,
            long elapsedRealtimeUs, int which) {
        return mWifiSignalStrengthsTimer[strengthBin].getTotalTimeLocked(
                elapsedRealtimeUs, which);
    }

    @Override public int getWifiSignalStrengthCount(int strengthBin, int which) {
        return mWifiSignalStrengthsTimer[strengthBin].getCountLocked(which);
    }

    @Override
    public ControllerActivityCounter getBluetoothControllerActivity() {
        return mBluetoothActivity;
    }

    @Override
    public ControllerActivityCounter getWifiControllerActivity() {
        return mWifiActivity;
    }

    @Override
    public ControllerActivityCounter getModemControllerActivity() {
        return mModemActivity;
    }

    @Override
    public boolean hasBluetoothActivityReporting() {
        return mHasBluetoothReporting;
    }

    @Override
    public boolean hasWifiActivityReporting() {
        return mHasWifiReporting;
    }

    @Override
    public boolean hasModemActivityReporting() {
        return mHasModemReporting;
    }

    @Override
    public long getFlashlightOnTime(long elapsedRealtimeUs, int which) {
        return mFlashlightOnTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override
    public long getFlashlightOnCount(int which) {
        return mFlashlightOnTimer.getCountLocked(which);
    }

    @Override
    public long getCameraOnTime(long elapsedRealtimeUs, int which) {
        return mCameraOnTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override
    public long getBluetoothScanTime(long elapsedRealtimeUs, int which) {
        return mBluetoothScanTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
    }

    @Override
    public long getNetworkActivityBytes(int type, int which) {
        if (type >= 0 && type < mNetworkByteActivityCounters.length) {
            return mNetworkByteActivityCounters[type].getCountLocked(which);
        } else {
            return 0;
        }
    }

    @Override
    public long getNetworkActivityPackets(int type, int which) {
        if (type >= 0 && type < mNetworkPacketActivityCounters.length) {
            return mNetworkPacketActivityCounters[type].getCountLocked(which);
        } else {
            return 0;
        }
    }

    @Override public long getStartClockTime() {
        final long currentTime = System.currentTimeMillis();
        if (ensureStartClockTime(currentTime)) {
            recordCurrentTimeChangeLocked(currentTime, SystemClock.elapsedRealtime(),
                    SystemClock.uptimeMillis());
        }
        return mStartClockTime;
    }

    @Override public String getStartPlatformVersion() {
        return mStartPlatformVersion;
    }

    @Override public String getEndPlatformVersion() {
        return mEndPlatformVersion;
    }

    @Override public int getParcelVersion() {
        return VERSION;
    }

    @Override public boolean getIsOnBattery() {
        return mOnBattery;
    }

    @Override public SparseArray<? extends BatteryStats.Uid> getUidStats() {
        return mUidStats;
    }

    /**
     * The statistics associated with a particular uid.
     */
    public final class Uid extends BatteryStats.Uid {

        final int mUid;

        boolean mWifiRunning;
        StopwatchTimer mWifiRunningTimer;

        boolean mFullWifiLockOut;
        StopwatchTimer mFullWifiLockTimer;

        boolean mWifiScanStarted;
        StopwatchTimer mWifiScanTimer;

        static final int NO_BATCHED_SCAN_STARTED = -1;
        int mWifiBatchedScanBinStarted = NO_BATCHED_SCAN_STARTED;
        StopwatchTimer[] mWifiBatchedScanTimer;

        boolean mWifiMulticastEnabled;
        StopwatchTimer mWifiMulticastTimer;

        StopwatchTimer mAudioTurnedOnTimer;
        StopwatchTimer mVideoTurnedOnTimer;
        StopwatchTimer mFlashlightTurnedOnTimer;
        StopwatchTimer mCameraTurnedOnTimer;
        StopwatchTimer mForegroundActivityTimer;
        StopwatchTimer mBluetoothScanTimer;

        int mProcessState = ActivityManager.PROCESS_STATE_NONEXISTENT;
        StopwatchTimer[] mProcessStateTimer;

        BatchTimer mVibratorOnTimer;

        Counter[] mUserActivityCounters;

        LongSamplingCounter[] mNetworkByteActivityCounters;
        LongSamplingCounter[] mNetworkPacketActivityCounters;
        LongSamplingCounter mMobileRadioActiveTime;
        LongSamplingCounter mMobileRadioActiveCount;

        /**
         * The amount of time this uid has kept the WiFi controller in idle, tx, and rx mode.
         * Can be null if the UID has had no such activity.
         */
        private ControllerActivityCounterImpl mWifiControllerActivity;

        /**
         * The amount of time this uid has kept the Bluetooth controller in idle, tx, and rx mode.
         * Can be null if the UID has had no such activity.
         */
        private ControllerActivityCounterImpl mBluetoothControllerActivity;

        /**
         * The amount of time this uid has kept the Modem controller in idle, tx, and rx mode.
         * Can be null if the UID has had no such activity.
         */
        private ControllerActivityCounterImpl mModemControllerActivity;

        /**
         * The CPU times we had at the last history details update.
         */
        long mLastStepUserTime;
        long mLastStepSystemTime;
        long mCurStepUserTime;
        long mCurStepSystemTime;

        LongSamplingCounter mUserCpuTime = new LongSamplingCounter(mOnBatteryTimeBase);
        LongSamplingCounter mSystemCpuTime = new LongSamplingCounter(mOnBatteryTimeBase);
        LongSamplingCounter mCpuPower = new LongSamplingCounter(mOnBatteryTimeBase);
        LongSamplingCounter[][] mCpuClusterSpeed;

        /**
         * The statistics we have collected for this uid's wake locks.
         */
        final OverflowArrayMap<Wakelock> mWakelockStats = new OverflowArrayMap<Wakelock>() {
            @Override public Wakelock instantiateObject() { return new Wakelock(); }
        };

        /**
         * The statistics we have collected for this uid's syncs.
         */
        final OverflowArrayMap<StopwatchTimer> mSyncStats = new OverflowArrayMap<StopwatchTimer>() {
            @Override public StopwatchTimer instantiateObject() {
                return new StopwatchTimer(Uid.this, SYNC, null, mOnBatteryTimeBase);
            }
        };

        /**
         * The statistics we have collected for this uid's jobs.
         */
        final OverflowArrayMap<StopwatchTimer> mJobStats = new OverflowArrayMap<StopwatchTimer>() {
            @Override public StopwatchTimer instantiateObject() {
                return new StopwatchTimer(Uid.this, JOB, null, mOnBatteryTimeBase);
            }
        };

        /**
         * The statistics we have collected for this uid's sensor activations.
         */
        final SparseArray<Sensor> mSensorStats = new SparseArray<>();

        /**
         * The statistics we have collected for this uid's processes.
         */
        final ArrayMap<String, Proc> mProcessStats = new ArrayMap<>();

        /**
         * The statistics we have collected for this uid's processes.
         */
        final ArrayMap<String, Pkg> mPackageStats = new ArrayMap<>();

        /**
         * The transient wake stats we have collected for this uid's pids.
         */
        final SparseArray<Pid> mPids = new SparseArray<>();

        public Uid(int uid) {
            mUid = uid;
            mWifiRunningTimer = new StopwatchTimer(Uid.this, WIFI_RUNNING,
                    mWifiRunningTimers, mOnBatteryTimeBase);
            mFullWifiLockTimer = new StopwatchTimer(Uid.this, FULL_WIFI_LOCK,
                    mFullWifiLockTimers, mOnBatteryTimeBase);
            mWifiScanTimer = new StopwatchTimer(Uid.this, WIFI_SCAN,
                    mWifiScanTimers, mOnBatteryTimeBase);
            mWifiBatchedScanTimer = new StopwatchTimer[NUM_WIFI_BATCHED_SCAN_BINS];
            mWifiMulticastTimer = new StopwatchTimer(Uid.this, WIFI_MULTICAST_ENABLED,
                    mWifiMulticastTimers, mOnBatteryTimeBase);
            mProcessStateTimer = new StopwatchTimer[NUM_PROCESS_STATE];
        }

        @Override
        public ArrayMap<String, ? extends BatteryStats.Uid.Wakelock> getWakelockStats() {
            return mWakelockStats.getMap();
        }

        @Override
        public ArrayMap<String, ? extends BatteryStats.Timer> getSyncStats() {
            return mSyncStats.getMap();
        }

        @Override
        public ArrayMap<String, ? extends BatteryStats.Timer> getJobStats() {
            return mJobStats.getMap();
        }

        @Override
        public SparseArray<? extends BatteryStats.Uid.Sensor> getSensorStats() {
            return mSensorStats;
        }

        @Override
        public ArrayMap<String, ? extends BatteryStats.Uid.Proc> getProcessStats() {
            return mProcessStats;
        }

        @Override
        public ArrayMap<String, ? extends BatteryStats.Uid.Pkg> getPackageStats() {
            return mPackageStats;
        }

        @Override
        public int getUid() {
            return mUid;
        }

        @Override
        public void noteWifiRunningLocked(long elapsedRealtimeMs) {
            if (!mWifiRunning) {
                mWifiRunning = true;
                if (mWifiRunningTimer == null) {
                    mWifiRunningTimer = new StopwatchTimer(Uid.this, WIFI_RUNNING,
                            mWifiRunningTimers, mOnBatteryTimeBase);
                }
                mWifiRunningTimer.startRunningLocked(elapsedRealtimeMs);
            }
        }

        @Override
        public void noteWifiStoppedLocked(long elapsedRealtimeMs) {
            if (mWifiRunning) {
                mWifiRunning = false;
                mWifiRunningTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        @Override
        public void noteFullWifiLockAcquiredLocked(long elapsedRealtimeMs) {
            if (!mFullWifiLockOut) {
                mFullWifiLockOut = true;
                if (mFullWifiLockTimer == null) {
                    mFullWifiLockTimer = new StopwatchTimer(Uid.this, FULL_WIFI_LOCK,
                            mFullWifiLockTimers, mOnBatteryTimeBase);
                }
                mFullWifiLockTimer.startRunningLocked(elapsedRealtimeMs);
            }
        }

        @Override
        public void noteFullWifiLockReleasedLocked(long elapsedRealtimeMs) {
            if (mFullWifiLockOut) {
                mFullWifiLockOut = false;
                mFullWifiLockTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        @Override
        public void noteWifiScanStartedLocked(long elapsedRealtimeMs) {
            if (!mWifiScanStarted) {
                mWifiScanStarted = true;
                if (mWifiScanTimer == null) {
                    mWifiScanTimer = new StopwatchTimer(Uid.this, WIFI_SCAN,
                            mWifiScanTimers, mOnBatteryTimeBase);
                }
                mWifiScanTimer.startRunningLocked(elapsedRealtimeMs);
            }
        }

        @Override
        public void noteWifiScanStoppedLocked(long elapsedRealtimeMs) {
            if (mWifiScanStarted) {
                mWifiScanStarted = false;
                mWifiScanTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        @Override
        public void noteWifiBatchedScanStartedLocked(int csph, long elapsedRealtimeMs) {
            int bin = 0;
            while (csph > 8 && bin < NUM_WIFI_BATCHED_SCAN_BINS-1) {
                csph = csph >> 3;
                bin++;
            }

            if (mWifiBatchedScanBinStarted == bin) return;

            if (mWifiBatchedScanBinStarted != NO_BATCHED_SCAN_STARTED) {
                mWifiBatchedScanTimer[mWifiBatchedScanBinStarted].
                        stopRunningLocked(elapsedRealtimeMs);
            }
            mWifiBatchedScanBinStarted = bin;
            if (mWifiBatchedScanTimer[bin] == null) {
                makeWifiBatchedScanBin(bin, null);
            }
            mWifiBatchedScanTimer[bin].startRunningLocked(elapsedRealtimeMs);
        }

        @Override
        public void noteWifiBatchedScanStoppedLocked(long elapsedRealtimeMs) {
            if (mWifiBatchedScanBinStarted != NO_BATCHED_SCAN_STARTED) {
                mWifiBatchedScanTimer[mWifiBatchedScanBinStarted].
                        stopRunningLocked(elapsedRealtimeMs);
                mWifiBatchedScanBinStarted = NO_BATCHED_SCAN_STARTED;
            }
        }

        @Override
        public void noteWifiMulticastEnabledLocked(long elapsedRealtimeMs) {
            if (!mWifiMulticastEnabled) {
                mWifiMulticastEnabled = true;
                if (mWifiMulticastTimer == null) {
                    mWifiMulticastTimer = new StopwatchTimer(Uid.this, WIFI_MULTICAST_ENABLED,
                            mWifiMulticastTimers, mOnBatteryTimeBase);
                }
                mWifiMulticastTimer.startRunningLocked(elapsedRealtimeMs);
            }
        }

        @Override
        public void noteWifiMulticastDisabledLocked(long elapsedRealtimeMs) {
            if (mWifiMulticastEnabled) {
                mWifiMulticastEnabled = false;
                mWifiMulticastTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        @Override
        public ControllerActivityCounter getWifiControllerActivity() {
            return mWifiControllerActivity;
        }

        @Override
        public ControllerActivityCounter getBluetoothControllerActivity() {
            return mBluetoothControllerActivity;
        }

        @Override
        public ControllerActivityCounter getModemControllerActivity() {
            return mModemControllerActivity;
        }

        public ControllerActivityCounterImpl getOrCreateWifiControllerActivityLocked() {
            if (mWifiControllerActivity == null) {
                mWifiControllerActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                        NUM_BT_TX_LEVELS);
            }
            return mWifiControllerActivity;
        }

        public ControllerActivityCounterImpl getOrCreateBluetoothControllerActivityLocked() {
            if (mBluetoothControllerActivity == null) {
                mBluetoothControllerActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                        NUM_BT_TX_LEVELS);
            }
            return mBluetoothControllerActivity;
        }

        public ControllerActivityCounterImpl getOrCreateModemControllerActivityLocked() {
            if (mModemControllerActivity == null) {
                mModemControllerActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                        ModemActivityInfo.TX_POWER_LEVELS);
            }
            return mModemControllerActivity;
        }

        public StopwatchTimer createAudioTurnedOnTimerLocked() {
            if (mAudioTurnedOnTimer == null) {
                mAudioTurnedOnTimer = new StopwatchTimer(Uid.this, AUDIO_TURNED_ON,
                        mAudioTurnedOnTimers, mOnBatteryTimeBase);
            }
            return mAudioTurnedOnTimer;
        }

        public void noteAudioTurnedOnLocked(long elapsedRealtimeMs) {
            createAudioTurnedOnTimerLocked().startRunningLocked(elapsedRealtimeMs);
        }

        public void noteAudioTurnedOffLocked(long elapsedRealtimeMs) {
            if (mAudioTurnedOnTimer != null) {
                mAudioTurnedOnTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteResetAudioLocked(long elapsedRealtimeMs) {
            if (mAudioTurnedOnTimer != null) {
                mAudioTurnedOnTimer.stopAllRunningLocked(elapsedRealtimeMs);
            }
        }

        public StopwatchTimer createVideoTurnedOnTimerLocked() {
            if (mVideoTurnedOnTimer == null) {
                mVideoTurnedOnTimer = new StopwatchTimer(Uid.this, VIDEO_TURNED_ON,
                        mVideoTurnedOnTimers, mOnBatteryTimeBase);
            }
            return mVideoTurnedOnTimer;
        }

        public void noteVideoTurnedOnLocked(long elapsedRealtimeMs) {
            createVideoTurnedOnTimerLocked().startRunningLocked(elapsedRealtimeMs);
        }

        public void noteVideoTurnedOffLocked(long elapsedRealtimeMs) {
            if (mVideoTurnedOnTimer != null) {
                mVideoTurnedOnTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteResetVideoLocked(long elapsedRealtimeMs) {
            if (mVideoTurnedOnTimer != null) {
                mVideoTurnedOnTimer.stopAllRunningLocked(elapsedRealtimeMs);
            }
        }

        public StopwatchTimer createFlashlightTurnedOnTimerLocked() {
            if (mFlashlightTurnedOnTimer == null) {
                mFlashlightTurnedOnTimer = new StopwatchTimer(Uid.this, FLASHLIGHT_TURNED_ON,
                        mFlashlightTurnedOnTimers, mOnBatteryTimeBase);
            }
            return mFlashlightTurnedOnTimer;
        }

        public void noteFlashlightTurnedOnLocked(long elapsedRealtimeMs) {
            createFlashlightTurnedOnTimerLocked().startRunningLocked(elapsedRealtimeMs);
        }

        public void noteFlashlightTurnedOffLocked(long elapsedRealtimeMs) {
            if (mFlashlightTurnedOnTimer != null) {
                mFlashlightTurnedOnTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteResetFlashlightLocked(long elapsedRealtimeMs) {
            if (mFlashlightTurnedOnTimer != null) {
                mFlashlightTurnedOnTimer.stopAllRunningLocked(elapsedRealtimeMs);
            }
        }

        public StopwatchTimer createCameraTurnedOnTimerLocked() {
            if (mCameraTurnedOnTimer == null) {
                mCameraTurnedOnTimer = new StopwatchTimer(Uid.this, CAMERA_TURNED_ON,
                        mCameraTurnedOnTimers, mOnBatteryTimeBase);
            }
            return mCameraTurnedOnTimer;
        }

        public void noteCameraTurnedOnLocked(long elapsedRealtimeMs) {
            createCameraTurnedOnTimerLocked().startRunningLocked(elapsedRealtimeMs);
        }

        public void noteCameraTurnedOffLocked(long elapsedRealtimeMs) {
            if (mCameraTurnedOnTimer != null) {
                mCameraTurnedOnTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteResetCameraLocked(long elapsedRealtimeMs) {
            if (mCameraTurnedOnTimer != null) {
                mCameraTurnedOnTimer.stopAllRunningLocked(elapsedRealtimeMs);
            }
        }

        public StopwatchTimer createForegroundActivityTimerLocked() {
            if (mForegroundActivityTimer == null) {
                mForegroundActivityTimer = new StopwatchTimer(
                        Uid.this, FOREGROUND_ACTIVITY, null, mOnBatteryTimeBase);
            }
            return mForegroundActivityTimer;
        }

        public StopwatchTimer createBluetoothScanTimerLocked() {
            if (mBluetoothScanTimer == null) {
                mBluetoothScanTimer = new StopwatchTimer(Uid.this, BLUETOOTH_SCAN_ON,
                        mBluetoothScanOnTimers, mOnBatteryTimeBase);
            }
            return mBluetoothScanTimer;
        }

        public void noteBluetoothScanStartedLocked(long elapsedRealtimeMs) {
            createBluetoothScanTimerLocked().startRunningLocked(elapsedRealtimeMs);
        }

        public void noteBluetoothScanStoppedLocked(long elapsedRealtimeMs) {
            if (mBluetoothScanTimer != null) {
                mBluetoothScanTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteResetBluetoothScanLocked(long elapsedRealtimeMs) {
            if (mBluetoothScanTimer != null) {
                mBluetoothScanTimer.stopAllRunningLocked(elapsedRealtimeMs);
            }
        }

        @Override
        public void noteActivityResumedLocked(long elapsedRealtimeMs) {
            // We always start, since we want multiple foreground PIDs to nest
            createForegroundActivityTimerLocked().startRunningLocked(elapsedRealtimeMs);
        }

        @Override
        public void noteActivityPausedLocked(long elapsedRealtimeMs) {
            if (mForegroundActivityTimer != null) {
                mForegroundActivityTimer.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public BatchTimer createVibratorOnTimerLocked() {
            if (mVibratorOnTimer == null) {
                mVibratorOnTimer = new BatchTimer(Uid.this, VIBRATOR_ON, mOnBatteryTimeBase);
            }
            return mVibratorOnTimer;
        }

        public void noteVibratorOnLocked(long durationMillis) {
            createVibratorOnTimerLocked().addDuration(BatteryStatsImpl.this, durationMillis);
        }

        public void noteVibratorOffLocked() {
            if (mVibratorOnTimer != null) {
                mVibratorOnTimer.abortLastDuration(BatteryStatsImpl.this);
            }
        }

        @Override
        public long getWifiRunningTime(long elapsedRealtimeUs, int which) {
            if (mWifiRunningTimer == null) {
                return 0;
            }
            return mWifiRunningTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
        }

        @Override
        public long getFullWifiLockTime(long elapsedRealtimeUs, int which) {
            if (mFullWifiLockTimer == null) {
                return 0;
            }
            return mFullWifiLockTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
        }

        @Override
        public long getWifiScanTime(long elapsedRealtimeUs, int which) {
            if (mWifiScanTimer == null) {
                return 0;
            }
            return mWifiScanTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
        }

        @Override
        public int getWifiScanCount(int which) {
            if (mWifiScanTimer == null) {
                return 0;
            }
            return mWifiScanTimer.getCountLocked(which);
        }

        @Override
        public long getWifiBatchedScanTime(int csphBin, long elapsedRealtimeUs, int which) {
            if (csphBin < 0 || csphBin >= NUM_WIFI_BATCHED_SCAN_BINS) return 0;
            if (mWifiBatchedScanTimer[csphBin] == null) {
                return 0;
            }
            return mWifiBatchedScanTimer[csphBin].getTotalTimeLocked(elapsedRealtimeUs, which);
        }

        @Override
        public int getWifiBatchedScanCount(int csphBin, int which) {
            if (csphBin < 0 || csphBin >= NUM_WIFI_BATCHED_SCAN_BINS) return 0;
            if (mWifiBatchedScanTimer[csphBin] == null) {
                return 0;
            }
            return mWifiBatchedScanTimer[csphBin].getCountLocked(which);
        }

        @Override
        public long getWifiMulticastTime(long elapsedRealtimeUs, int which) {
            if (mWifiMulticastTimer == null) {
                return 0;
            }
            return mWifiMulticastTimer.getTotalTimeLocked(elapsedRealtimeUs, which);
        }

        @Override
        public Timer getAudioTurnedOnTimer() {
            return mAudioTurnedOnTimer;
        }

        @Override
        public Timer getVideoTurnedOnTimer() {
            return mVideoTurnedOnTimer;
        }

        @Override
        public Timer getFlashlightTurnedOnTimer() {
            return mFlashlightTurnedOnTimer;
        }

        @Override
        public Timer getCameraTurnedOnTimer() {
            return mCameraTurnedOnTimer;
        }

        @Override
        public Timer getForegroundActivityTimer() {
            return mForegroundActivityTimer;
        }

        @Override
        public Timer getBluetoothScanTimer() {
            return mBluetoothScanTimer;
        }

        void makeProcessState(int i, Parcel in) {
            if (i < 0 || i >= NUM_PROCESS_STATE) return;

            if (in == null) {
                mProcessStateTimer[i] = new StopwatchTimer(this, PROCESS_STATE, null,
                        mOnBatteryTimeBase);
            } else {
                mProcessStateTimer[i] = new StopwatchTimer(this, PROCESS_STATE, null,
                        mOnBatteryTimeBase, in);
            }
        }

        @Override
        public long getProcessStateTime(int state, long elapsedRealtimeUs, int which) {
            if (state < 0 || state >= NUM_PROCESS_STATE) return 0;
            if (mProcessStateTimer[state] == null) {
                return 0;
            }
            return mProcessStateTimer[state].getTotalTimeLocked(elapsedRealtimeUs, which);
        }

        @Override
        public Timer getVibratorOnTimer() {
            return mVibratorOnTimer;
        }

        @Override
        public void noteUserActivityLocked(int type) {
            if (mUserActivityCounters == null) {
                initUserActivityLocked();
            }
            if (type >= 0 && type < NUM_USER_ACTIVITY_TYPES) {
                mUserActivityCounters[type].stepAtomic();
            } else {
                Slog.w(TAG, "Unknown user activity type " + type + " was specified.",
                        new Throwable());
            }
        }

        @Override
        public boolean hasUserActivity() {
            return mUserActivityCounters != null;
        }

        @Override
        public int getUserActivityCount(int type, int which) {
            if (mUserActivityCounters == null) {
                return 0;
            }
            return mUserActivityCounters[type].getCountLocked(which);
        }

        void makeWifiBatchedScanBin(int i, Parcel in) {
            if (i < 0 || i >= NUM_WIFI_BATCHED_SCAN_BINS) return;

            ArrayList<StopwatchTimer> collected = mWifiBatchedScanTimers.get(i);
            if (collected == null) {
                collected = new ArrayList<StopwatchTimer>();
                mWifiBatchedScanTimers.put(i, collected);
            }
            if (in == null) {
                mWifiBatchedScanTimer[i] = new StopwatchTimer(this, WIFI_BATCHED_SCAN, collected,
                        mOnBatteryTimeBase);
            } else {
                mWifiBatchedScanTimer[i] = new StopwatchTimer(this, WIFI_BATCHED_SCAN, collected,
                        mOnBatteryTimeBase, in);
            }
        }


        void initUserActivityLocked() {
            mUserActivityCounters = new Counter[NUM_USER_ACTIVITY_TYPES];
            for (int i=0; i<NUM_USER_ACTIVITY_TYPES; i++) {
                mUserActivityCounters[i] = new Counter(mOnBatteryTimeBase);
            }
        }

        void noteNetworkActivityLocked(int type, long deltaBytes, long deltaPackets) {
            if (mNetworkByteActivityCounters == null) {
                initNetworkActivityLocked();
            }
            if (type >= 0 && type < NUM_NETWORK_ACTIVITY_TYPES) {
                mNetworkByteActivityCounters[type].addCountLocked(deltaBytes);
                mNetworkPacketActivityCounters[type].addCountLocked(deltaPackets);
            } else {
                Slog.w(TAG, "Unknown network activity type " + type + " was specified.",
                        new Throwable());
            }
        }

        void noteMobileRadioActiveTimeLocked(long batteryUptime) {
            if (mNetworkByteActivityCounters == null) {
                initNetworkActivityLocked();
            }
            mMobileRadioActiveTime.addCountLocked(batteryUptime);
            mMobileRadioActiveCount.addCountLocked(1);
        }

        @Override
        public boolean hasNetworkActivity() {
            return mNetworkByteActivityCounters != null;
        }

        @Override
        public long getNetworkActivityBytes(int type, int which) {
            if (mNetworkByteActivityCounters != null && type >= 0
                    && type < mNetworkByteActivityCounters.length) {
                return mNetworkByteActivityCounters[type].getCountLocked(which);
            } else {
                return 0;
            }
        }

        @Override
        public long getNetworkActivityPackets(int type, int which) {
            if (mNetworkPacketActivityCounters != null && type >= 0
                    && type < mNetworkPacketActivityCounters.length) {
                return mNetworkPacketActivityCounters[type].getCountLocked(which);
            } else {
                return 0;
            }
        }

        @Override
        public long getMobileRadioActiveTime(int which) {
            return mMobileRadioActiveTime != null
                    ? mMobileRadioActiveTime.getCountLocked(which) : 0;
        }

        @Override
        public int getMobileRadioActiveCount(int which) {
            return mMobileRadioActiveCount != null
                    ? (int)mMobileRadioActiveCount.getCountLocked(which) : 0;
        }

        @Override
        public long getUserCpuTimeUs(int which) {
            return mUserCpuTime.getCountLocked(which);
        }

        @Override
        public long getSystemCpuTimeUs(int which) {
            return mSystemCpuTime.getCountLocked(which);
        }

        @Override
        public long getCpuPowerMaUs(int which) {
            return mCpuPower.getCountLocked(which);
        }

        @Override
        public long getTimeAtCpuSpeed(int cluster, int step, int which) {
            if (mCpuClusterSpeed != null) {
                if (cluster >= 0 && cluster < mCpuClusterSpeed.length) {
                    final LongSamplingCounter[] cpuSpeeds = mCpuClusterSpeed[cluster];
                    if (cpuSpeeds != null) {
                        if (step >= 0 && step < cpuSpeeds.length) {
                            final LongSamplingCounter c = cpuSpeeds[step];
                            if (c != null) {
                                return c.getCountLocked(which);
                            }
                        }
                    }
                }
            }
            return 0;
        }

        void initNetworkActivityLocked() {
            mNetworkByteActivityCounters = new LongSamplingCounter[NUM_NETWORK_ACTIVITY_TYPES];
            mNetworkPacketActivityCounters = new LongSamplingCounter[NUM_NETWORK_ACTIVITY_TYPES];
            for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
                mNetworkByteActivityCounters[i] = new LongSamplingCounter(mOnBatteryTimeBase);
                mNetworkPacketActivityCounters[i] = new LongSamplingCounter(mOnBatteryTimeBase);
            }
            mMobileRadioActiveTime = new LongSamplingCounter(mOnBatteryTimeBase);
            mMobileRadioActiveCount = new LongSamplingCounter(mOnBatteryTimeBase);
        }

        /**
         * Clear all stats for this uid.  Returns true if the uid is completely
         * inactive so can be dropped.
         */
        boolean reset() {
            boolean active = false;

            if (mWifiRunningTimer != null) {
                active |= !mWifiRunningTimer.reset(false);
                active |= mWifiRunning;
            }
            if (mFullWifiLockTimer != null) {
                active |= !mFullWifiLockTimer.reset(false);
                active |= mFullWifiLockOut;
            }
            if (mWifiScanTimer != null) {
                active |= !mWifiScanTimer.reset(false);
                active |= mWifiScanStarted;
            }
            if (mWifiBatchedScanTimer != null) {
                for (int i = 0; i < NUM_WIFI_BATCHED_SCAN_BINS; i++) {
                    if (mWifiBatchedScanTimer[i] != null) {
                        active |= !mWifiBatchedScanTimer[i].reset(false);
                    }
                }
                active |= (mWifiBatchedScanBinStarted != NO_BATCHED_SCAN_STARTED);
            }
            if (mWifiMulticastTimer != null) {
                active |= !mWifiMulticastTimer.reset(false);
                active |= mWifiMulticastEnabled;
            }
            if (mAudioTurnedOnTimer != null) {
                active |= !mAudioTurnedOnTimer.reset(false);
            }
            if (mVideoTurnedOnTimer != null) {
                active |= !mVideoTurnedOnTimer.reset(false);
            }
            if (mFlashlightTurnedOnTimer != null) {
                active |= !mFlashlightTurnedOnTimer.reset(false);
            }
            if (mCameraTurnedOnTimer != null) {
                active |= !mCameraTurnedOnTimer.reset(false);
            }
            if (mForegroundActivityTimer != null) {
                active |= !mForegroundActivityTimer.reset(false);
            }
            if (mBluetoothScanTimer != null) {
                active |= !mBluetoothScanTimer.reset(false);
            }
            if (mProcessStateTimer != null) {
                for (int i = 0; i < NUM_PROCESS_STATE; i++) {
                    if (mProcessStateTimer[i] != null) {
                        active |= !mProcessStateTimer[i].reset(false);
                    }
                }
                active |= (mProcessState != ActivityManager.PROCESS_STATE_NONEXISTENT);
            }
            if (mVibratorOnTimer != null) {
                if (mVibratorOnTimer.reset(false)) {
                    mVibratorOnTimer.detach();
                    mVibratorOnTimer = null;
                } else {
                    active = true;
                }
            }

            if (mUserActivityCounters != null) {
                for (int i=0; i<NUM_USER_ACTIVITY_TYPES; i++) {
                    mUserActivityCounters[i].reset(false);
                }
            }

            if (mNetworkByteActivityCounters != null) {
                for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
                    mNetworkByteActivityCounters[i].reset(false);
                    mNetworkPacketActivityCounters[i].reset(false);
                }
                mMobileRadioActiveTime.reset(false);
                mMobileRadioActiveCount.reset(false);
            }

            if (mWifiControllerActivity != null) {
                mWifiControllerActivity.reset(false);
            }

            if (mBluetoothActivity != null) {
                mBluetoothActivity.reset(false);
            }

            if (mModemActivity != null) {
                mModemActivity.reset(false);
            }

            mUserCpuTime.reset(false);
            mSystemCpuTime.reset(false);
            mCpuPower.reset(false);

            if (mCpuClusterSpeed != null) {
                for (LongSamplingCounter[] speeds : mCpuClusterSpeed) {
                    if (speeds != null) {
                        for (LongSamplingCounter speed : speeds) {
                            if (speed != null) {
                                speed.reset(false);
                            }
                        }
                    }
                }
            }

            final ArrayMap<String, Wakelock> wakeStats = mWakelockStats.getMap();
            for (int iw=wakeStats.size()-1; iw>=0; iw--) {
                Wakelock wl = wakeStats.valueAt(iw);
                if (wl.reset()) {
                    wakeStats.removeAt(iw);
                } else {
                    active = true;
                }
            }
            mWakelockStats.cleanup();
            final ArrayMap<String, StopwatchTimer> syncStats = mSyncStats.getMap();
            for (int is=syncStats.size()-1; is>=0; is--) {
                StopwatchTimer timer = syncStats.valueAt(is);
                if (timer.reset(false)) {
                    syncStats.removeAt(is);
                    timer.detach();
                } else {
                    active = true;
                }
            }
            mSyncStats.cleanup();
            final ArrayMap<String, StopwatchTimer> jobStats = mJobStats.getMap();
            for (int ij=jobStats.size()-1; ij>=0; ij--) {
                StopwatchTimer timer = jobStats.valueAt(ij);
                if (timer.reset(false)) {
                    jobStats.removeAt(ij);
                    timer.detach();
                } else {
                    active = true;
                }
            }
            mJobStats.cleanup();
            for (int ise=mSensorStats.size()-1; ise>=0; ise--) {
                Sensor s = mSensorStats.valueAt(ise);
                if (s.reset()) {
                    mSensorStats.removeAt(ise);
                } else {
                    active = true;
                }
            }
            for (int ip=mProcessStats.size()-1; ip>=0; ip--) {
                Proc proc = mProcessStats.valueAt(ip);
                proc.detach();
            }
            mProcessStats.clear();
            if (mPids.size() > 0) {
                for (int i=mPids.size()-1; i>=0; i--) {
                    Pid pid = mPids.valueAt(i);
                    if (pid.mWakeNesting > 0) {
                        active = true;
                    } else {
                        mPids.removeAt(i);
                    }
                }
            }
            if (mPackageStats.size() > 0) {
                Iterator<Map.Entry<String, Pkg>> it = mPackageStats.entrySet().iterator();
                while (it.hasNext()) {
                    Map.Entry<String, Pkg> pkgEntry = it.next();
                    Pkg p = pkgEntry.getValue();
                    p.detach();
                    if (p.mServiceStats.size() > 0) {
                        Iterator<Map.Entry<String, Pkg.Serv>> it2
                                = p.mServiceStats.entrySet().iterator();
                        while (it2.hasNext()) {
                            Map.Entry<String, Pkg.Serv> servEntry = it2.next();
                            servEntry.getValue().detach();
                        }
                    }
                }
                mPackageStats.clear();
            }

            mLastStepUserTime = mLastStepSystemTime = 0;
            mCurStepUserTime = mCurStepSystemTime = 0;

            if (!active) {
                if (mWifiRunningTimer != null) {
                    mWifiRunningTimer.detach();
                }
                if (mFullWifiLockTimer != null) {
                    mFullWifiLockTimer.detach();
                }
                if (mWifiScanTimer != null) {
                    mWifiScanTimer.detach();
                }
                for (int i = 0; i < NUM_WIFI_BATCHED_SCAN_BINS; i++) {
                    if (mWifiBatchedScanTimer[i] != null) {
                        mWifiBatchedScanTimer[i].detach();
                    }
                }
                if (mWifiMulticastTimer != null) {
                    mWifiMulticastTimer.detach();
                }
                if (mAudioTurnedOnTimer != null) {
                    mAudioTurnedOnTimer.detach();
                    mAudioTurnedOnTimer = null;
                }
                if (mVideoTurnedOnTimer != null) {
                    mVideoTurnedOnTimer.detach();
                    mVideoTurnedOnTimer = null;
                }
                if (mFlashlightTurnedOnTimer != null) {
                    mFlashlightTurnedOnTimer.detach();
                    mFlashlightTurnedOnTimer = null;
                }
                if (mCameraTurnedOnTimer != null) {
                    mCameraTurnedOnTimer.detach();
                    mCameraTurnedOnTimer = null;
                }
                if (mForegroundActivityTimer != null) {
                    mForegroundActivityTimer.detach();
                    mForegroundActivityTimer = null;
                }
                if (mBluetoothScanTimer != null) {
                    mBluetoothScanTimer.detach();
                    mBluetoothScanTimer = null;
                }
                if (mUserActivityCounters != null) {
                    for (int i=0; i<NUM_USER_ACTIVITY_TYPES; i++) {
                        mUserActivityCounters[i].detach();
                    }
                }
                if (mNetworkByteActivityCounters != null) {
                    for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
                        mNetworkByteActivityCounters[i].detach();
                        mNetworkPacketActivityCounters[i].detach();
                    }
                }

                if (mWifiControllerActivity != null) {
                    mWifiControllerActivity.detach();
                }

                if (mBluetoothControllerActivity != null) {
                    mBluetoothControllerActivity.detach();
                }

                if (mModemControllerActivity != null) {
                    mModemControllerActivity.detach();
                }

                mPids.clear();

                mUserCpuTime.detach();
                mSystemCpuTime.detach();
                mCpuPower.detach();

                if (mCpuClusterSpeed != null) {
                    for (LongSamplingCounter[] cpuSpeeds : mCpuClusterSpeed) {
                        if (cpuSpeeds != null) {
                            for (LongSamplingCounter c : cpuSpeeds) {
                                if (c != null) {
                                    c.detach();
                                }
                            }
                        }
                    }
                }
            }

            return !active;
        }

        void writeToParcelLocked(Parcel out, long elapsedRealtimeUs) {
            final ArrayMap<String, Wakelock> wakeStats = mWakelockStats.getMap();
            int NW = wakeStats.size();
            out.writeInt(NW);
            for (int iw=0; iw<NW; iw++) {
                out.writeString(wakeStats.keyAt(iw));
                Uid.Wakelock wakelock = wakeStats.valueAt(iw);
                wakelock.writeToParcelLocked(out, elapsedRealtimeUs);
            }

            final ArrayMap<String, StopwatchTimer> syncStats = mSyncStats.getMap();
            int NS = syncStats.size();
            out.writeInt(NS);
            for (int is=0; is<NS; is++) {
                out.writeString(syncStats.keyAt(is));
                StopwatchTimer timer = syncStats.valueAt(is);
                Timer.writeTimerToParcel(out, timer, elapsedRealtimeUs);
            }

            final ArrayMap<String, StopwatchTimer> jobStats = mJobStats.getMap();
            int NJ = jobStats.size();
            out.writeInt(NJ);
            for (int ij=0; ij<NJ; ij++) {
                out.writeString(jobStats.keyAt(ij));
                StopwatchTimer timer = jobStats.valueAt(ij);
                Timer.writeTimerToParcel(out, timer, elapsedRealtimeUs);
            }

            int NSE = mSensorStats.size();
            out.writeInt(NSE);
            for (int ise=0; ise<NSE; ise++) {
                out.writeInt(mSensorStats.keyAt(ise));
                Uid.Sensor sensor = mSensorStats.valueAt(ise);
                sensor.writeToParcelLocked(out, elapsedRealtimeUs);
            }

            int NP = mProcessStats.size();
            out.writeInt(NP);
            for (int ip=0; ip<NP; ip++) {
                out.writeString(mProcessStats.keyAt(ip));
                Uid.Proc proc = mProcessStats.valueAt(ip);
                proc.writeToParcelLocked(out);
            }

            out.writeInt(mPackageStats.size());
            for (Map.Entry<String, Uid.Pkg> pkgEntry : mPackageStats.entrySet()) {
                out.writeString(pkgEntry.getKey());
                Uid.Pkg pkg = pkgEntry.getValue();
                pkg.writeToParcelLocked(out);
            }

            if (mWifiRunningTimer != null) {
                out.writeInt(1);
                mWifiRunningTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            if (mFullWifiLockTimer != null) {
                out.writeInt(1);
                mFullWifiLockTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            if (mWifiScanTimer != null) {
                out.writeInt(1);
                mWifiScanTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            for (int i = 0; i < NUM_WIFI_BATCHED_SCAN_BINS; i++) {
                if (mWifiBatchedScanTimer[i] != null) {
                    out.writeInt(1);
                    mWifiBatchedScanTimer[i].writeToParcel(out, elapsedRealtimeUs);
                } else {
                    out.writeInt(0);
                }
            }
            if (mWifiMulticastTimer != null) {
                out.writeInt(1);
                mWifiMulticastTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }

            if (mAudioTurnedOnTimer != null) {
                out.writeInt(1);
                mAudioTurnedOnTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            if (mVideoTurnedOnTimer != null) {
                out.writeInt(1);
                mVideoTurnedOnTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            if (mFlashlightTurnedOnTimer != null) {
                out.writeInt(1);
                mFlashlightTurnedOnTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            if (mCameraTurnedOnTimer != null) {
                out.writeInt(1);
                mCameraTurnedOnTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            if (mForegroundActivityTimer != null) {
                out.writeInt(1);
                mForegroundActivityTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            if (mBluetoothScanTimer != null) {
                out.writeInt(1);
                mBluetoothScanTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            for (int i = 0; i < NUM_PROCESS_STATE; i++) {
                if (mProcessStateTimer[i] != null) {
                    out.writeInt(1);
                    mProcessStateTimer[i].writeToParcel(out, elapsedRealtimeUs);
                } else {
                    out.writeInt(0);
                }
            }
            if (mVibratorOnTimer != null) {
                out.writeInt(1);
                mVibratorOnTimer.writeToParcel(out, elapsedRealtimeUs);
            } else {
                out.writeInt(0);
            }
            if (mUserActivityCounters != null) {
                out.writeInt(1);
                for (int i=0; i<NUM_USER_ACTIVITY_TYPES; i++) {
                    mUserActivityCounters[i].writeToParcel(out);
                }
            } else {
                out.writeInt(0);
            }
            if (mNetworkByteActivityCounters != null) {
                out.writeInt(1);
                for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
                    mNetworkByteActivityCounters[i].writeToParcel(out);
                    mNetworkPacketActivityCounters[i].writeToParcel(out);
                }
                mMobileRadioActiveTime.writeToParcel(out);
                mMobileRadioActiveCount.writeToParcel(out);
            } else {
                out.writeInt(0);
            }

            if (mWifiControllerActivity != null) {
                out.writeInt(1);
                mWifiControllerActivity.writeToParcel(out, 0);
            } else {
                out.writeInt(0);
            }

            if (mBluetoothControllerActivity != null) {
                out.writeInt(1);
                mBluetoothControllerActivity.writeToParcel(out, 0);
            } else {
                out.writeInt(0);
            }

            if (mModemControllerActivity != null) {
                out.writeInt(1);
                mModemControllerActivity.writeToParcel(out, 0);
            } else {
                out.writeInt(0);
            }

            mUserCpuTime.writeToParcel(out);
            mSystemCpuTime.writeToParcel(out);
            mCpuPower.writeToParcel(out);

            if (mCpuClusterSpeed != null) {
                out.writeInt(1);
                out.writeInt(mCpuClusterSpeed.length);
                for (LongSamplingCounter[] cpuSpeeds : mCpuClusterSpeed) {
                    if (cpuSpeeds != null) {
                        out.writeInt(1);
                        out.writeInt(cpuSpeeds.length);
                        for (LongSamplingCounter c : cpuSpeeds) {
                            if (c != null) {
                                out.writeInt(1);
                                c.writeToParcel(out);
                            } else {
                                out.writeInt(0);
                            }
                        }
                    } else {
                        out.writeInt(0);
                    }
                }
            } else {
                out.writeInt(0);
            }
        }

        void readFromParcelLocked(TimeBase timeBase, TimeBase screenOffTimeBase, Parcel in) {
            int numWakelocks = in.readInt();
            mWakelockStats.clear();
            for (int j = 0; j < numWakelocks; j++) {
                String wakelockName = in.readString();
                Uid.Wakelock wakelock = new Wakelock();
                wakelock.readFromParcelLocked(timeBase, screenOffTimeBase, in);
                mWakelockStats.add(wakelockName, wakelock);
            }

            int numSyncs = in.readInt();
            mSyncStats.clear();
            for (int j = 0; j < numSyncs; j++) {
                String syncName = in.readString();
                if (in.readInt() != 0) {
                    mSyncStats.add(syncName,
                            new StopwatchTimer(Uid.this, SYNC, null, timeBase, in));
                }
            }

            int numJobs = in.readInt();
            mJobStats.clear();
            for (int j = 0; j < numJobs; j++) {
                String jobName = in.readString();
                if (in.readInt() != 0) {
                    mJobStats.add(jobName, new StopwatchTimer(Uid.this, JOB, null, timeBase, in));
                }
            }

            int numSensors = in.readInt();
            mSensorStats.clear();
            for (int k = 0; k < numSensors; k++) {
                int sensorNumber = in.readInt();
                Uid.Sensor sensor = new Sensor(sensorNumber);
                sensor.readFromParcelLocked(mOnBatteryTimeBase, in);
                mSensorStats.put(sensorNumber, sensor);
            }

            int numProcs = in.readInt();
            mProcessStats.clear();
            for (int k = 0; k < numProcs; k++) {
                String processName = in.readString();
                Uid.Proc proc = new Proc(processName);
                proc.readFromParcelLocked(in);
                mProcessStats.put(processName, proc);
            }

            int numPkgs = in.readInt();
            mPackageStats.clear();
            for (int l = 0; l < numPkgs; l++) {
                String packageName = in.readString();
                Uid.Pkg pkg = new Pkg();
                pkg.readFromParcelLocked(in);
                mPackageStats.put(packageName, pkg);
            }

            mWifiRunning = false;
            if (in.readInt() != 0) {
                mWifiRunningTimer = new StopwatchTimer(Uid.this, WIFI_RUNNING,
                        mWifiRunningTimers, mOnBatteryTimeBase, in);
            } else {
                mWifiRunningTimer = null;
            }
            mFullWifiLockOut = false;
            if (in.readInt() != 0) {
                mFullWifiLockTimer = new StopwatchTimer(Uid.this, FULL_WIFI_LOCK,
                        mFullWifiLockTimers, mOnBatteryTimeBase, in);
            } else {
                mFullWifiLockTimer = null;
            }
            mWifiScanStarted = false;
            if (in.readInt() != 0) {
                mWifiScanTimer = new StopwatchTimer(Uid.this, WIFI_SCAN,
                        mWifiScanTimers, mOnBatteryTimeBase, in);
            } else {
                mWifiScanTimer = null;
            }
            mWifiBatchedScanBinStarted = NO_BATCHED_SCAN_STARTED;
            for (int i = 0; i < NUM_WIFI_BATCHED_SCAN_BINS; i++) {
                if (in.readInt() != 0) {
                    makeWifiBatchedScanBin(i, in);
                } else {
                    mWifiBatchedScanTimer[i] = null;
                }
            }
            mWifiMulticastEnabled = false;
            if (in.readInt() != 0) {
                mWifiMulticastTimer = new StopwatchTimer(Uid.this, WIFI_MULTICAST_ENABLED,
                        mWifiMulticastTimers, mOnBatteryTimeBase, in);
            } else {
                mWifiMulticastTimer = null;
            }
            if (in.readInt() != 0) {
                mAudioTurnedOnTimer = new StopwatchTimer(Uid.this, AUDIO_TURNED_ON,
                        mAudioTurnedOnTimers, mOnBatteryTimeBase, in);
            } else {
                mAudioTurnedOnTimer = null;
            }
            if (in.readInt() != 0) {
                mVideoTurnedOnTimer = new StopwatchTimer(Uid.this, VIDEO_TURNED_ON,
                        mVideoTurnedOnTimers, mOnBatteryTimeBase, in);
            } else {
                mVideoTurnedOnTimer = null;
            }
            if (in.readInt() != 0) {
                mFlashlightTurnedOnTimer = new StopwatchTimer(Uid.this, FLASHLIGHT_TURNED_ON,
                        mFlashlightTurnedOnTimers, mOnBatteryTimeBase, in);
            } else {
                mFlashlightTurnedOnTimer = null;
            }
            if (in.readInt() != 0) {
                mCameraTurnedOnTimer = new StopwatchTimer(Uid.this, CAMERA_TURNED_ON,
                        mCameraTurnedOnTimers, mOnBatteryTimeBase, in);
            } else {
                mCameraTurnedOnTimer = null;
            }
            if (in.readInt() != 0) {
                mForegroundActivityTimer = new StopwatchTimer(
                        Uid.this, FOREGROUND_ACTIVITY, null, mOnBatteryTimeBase, in);
            } else {
                mForegroundActivityTimer = null;
            }
            if (in.readInt() != 0) {
                mBluetoothScanTimer = new StopwatchTimer(Uid.this, BLUETOOTH_SCAN_ON,
                        mBluetoothScanOnTimers, mOnBatteryTimeBase, in);
            } else {
                mBluetoothScanTimer = null;
            }
            mProcessState = ActivityManager.PROCESS_STATE_NONEXISTENT;
            for (int i = 0; i < NUM_PROCESS_STATE; i++) {
                if (in.readInt() != 0) {
                    makeProcessState(i, in);
                } else {
                    mProcessStateTimer[i] = null;
                }
            }
            if (in.readInt() != 0) {
                mVibratorOnTimer = new BatchTimer(Uid.this, VIBRATOR_ON, mOnBatteryTimeBase, in);
            } else {
                mVibratorOnTimer = null;
            }
            if (in.readInt() != 0) {
                mUserActivityCounters = new Counter[NUM_USER_ACTIVITY_TYPES];
                for (int i=0; i<NUM_USER_ACTIVITY_TYPES; i++) {
                    mUserActivityCounters[i] = new Counter(mOnBatteryTimeBase, in);
                }
            } else {
                mUserActivityCounters = null;
            }
            if (in.readInt() != 0) {
                mNetworkByteActivityCounters = new LongSamplingCounter[NUM_NETWORK_ACTIVITY_TYPES];
                mNetworkPacketActivityCounters
                        = new LongSamplingCounter[NUM_NETWORK_ACTIVITY_TYPES];
                for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
                    mNetworkByteActivityCounters[i]
                            = new LongSamplingCounter(mOnBatteryTimeBase, in);
                    mNetworkPacketActivityCounters[i]
                            = new LongSamplingCounter(mOnBatteryTimeBase, in);
                }
                mMobileRadioActiveTime = new LongSamplingCounter(mOnBatteryTimeBase, in);
                mMobileRadioActiveCount = new LongSamplingCounter(mOnBatteryTimeBase, in);
            } else {
                mNetworkByteActivityCounters = null;
                mNetworkPacketActivityCounters = null;
            }

            if (in.readInt() != 0) {
                mWifiControllerActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                        NUM_WIFI_TX_LEVELS, in);
            } else {
                mWifiControllerActivity = null;
            }

            if (in.readInt() != 0) {
                mBluetoothControllerActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                        NUM_BT_TX_LEVELS, in);
            } else {
                mBluetoothControllerActivity = null;
            }

            if (in.readInt() != 0) {
                mModemControllerActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                        ModemActivityInfo.TX_POWER_LEVELS, in);
            } else {
                mModemControllerActivity = null;
            }

            mUserCpuTime = new LongSamplingCounter(mOnBatteryTimeBase, in);
            mSystemCpuTime = new LongSamplingCounter(mOnBatteryTimeBase, in);
            mCpuPower = new LongSamplingCounter(mOnBatteryTimeBase, in);

            if (in.readInt() != 0) {
                int numCpuClusters = in.readInt();
                if (mPowerProfile != null && mPowerProfile.getNumCpuClusters() != numCpuClusters) {
                    throw new ParcelFormatException("Incompatible number of cpu clusters");
                }

                mCpuClusterSpeed = new LongSamplingCounter[numCpuClusters][];
                for (int cluster = 0; cluster < numCpuClusters; cluster++) {
                    if (in.readInt() != 0) {
                        int numSpeeds = in.readInt();
                        if (mPowerProfile != null &&
                                mPowerProfile.getNumSpeedStepsInCpuCluster(cluster) != numSpeeds) {
                            throw new ParcelFormatException("Incompatible number of cpu speeds");
                        }

                        final LongSamplingCounter[] cpuSpeeds = new LongSamplingCounter[numSpeeds];
                        mCpuClusterSpeed[cluster] = cpuSpeeds;
                        for (int speed = 0; speed < numSpeeds; speed++) {
                            if (in.readInt() != 0) {
                                cpuSpeeds[speed] = new LongSamplingCounter(mOnBatteryTimeBase, in);
                            }
                        }
                    } else {
                        mCpuClusterSpeed[cluster] = null;
                    }
                }
            } else {
                mCpuClusterSpeed = null;
            }
        }

        /**
         * The statistics associated with a particular wake lock.
         */
        public final class Wakelock extends BatteryStats.Uid.Wakelock {
            /**
             * How long (in ms) this uid has been keeping the device partially awake.
             */
            StopwatchTimer mTimerPartial;

            /**
             * How long (in ms) this uid has been keeping the device fully awake.
             */
            StopwatchTimer mTimerFull;

            /**
             * How long (in ms) this uid has had a window keeping the device awake.
             */
            StopwatchTimer mTimerWindow;

            /**
             * How long (in ms) this uid has had a draw wake lock.
             */
            StopwatchTimer mTimerDraw;

            /**
             * Reads a possibly null Timer from a Parcel.  The timer is associated with the
             * proper timer pool from the given BatteryStatsImpl object.
             *
             * @param in the Parcel to be read from.
             * return a new Timer, or null.
             */
            private StopwatchTimer readTimerFromParcel(int type, ArrayList<StopwatchTimer> pool,
                    TimeBase timeBase, Parcel in) {
                if (in.readInt() == 0) {
                    return null;
                }

                return new StopwatchTimer(Uid.this, type, pool, timeBase, in);
            }

            boolean reset() {
                boolean wlactive = false;
                if (mTimerFull != null) {
                    wlactive |= !mTimerFull.reset(false);
                }
                if (mTimerPartial != null) {
                    wlactive |= !mTimerPartial.reset(false);
                }
                if (mTimerWindow != null) {
                    wlactive |= !mTimerWindow.reset(false);
                }
                if (mTimerDraw != null) {
                    wlactive |= !mTimerDraw.reset(false);
                }
                if (!wlactive) {
                    if (mTimerFull != null) {
                        mTimerFull.detach();
                        mTimerFull = null;
                    }
                    if (mTimerPartial != null) {
                        mTimerPartial.detach();
                        mTimerPartial = null;
                    }
                    if (mTimerWindow != null) {
                        mTimerWindow.detach();
                        mTimerWindow = null;
                    }
                    if (mTimerDraw != null) {
                        mTimerDraw.detach();
                        mTimerDraw = null;
                    }
                }
                return !wlactive;
            }

            void readFromParcelLocked(TimeBase timeBase, TimeBase screenOffTimeBase, Parcel in) {
                mTimerPartial = readTimerFromParcel(WAKE_TYPE_PARTIAL,
                        mPartialTimers, screenOffTimeBase, in);
                mTimerFull = readTimerFromParcel(WAKE_TYPE_FULL, mFullTimers, timeBase, in);
                mTimerWindow = readTimerFromParcel(WAKE_TYPE_WINDOW, mWindowTimers, timeBase, in);
                mTimerDraw = readTimerFromParcel(WAKE_TYPE_DRAW, mDrawTimers, timeBase, in);
            }

            void writeToParcelLocked(Parcel out, long elapsedRealtimeUs) {
                Timer.writeTimerToParcel(out, mTimerPartial, elapsedRealtimeUs);
                Timer.writeTimerToParcel(out, mTimerFull, elapsedRealtimeUs);
                Timer.writeTimerToParcel(out, mTimerWindow, elapsedRealtimeUs);
                Timer.writeTimerToParcel(out, mTimerDraw, elapsedRealtimeUs);
            }

            @Override
            public Timer getWakeTime(int type) {
                switch (type) {
                case WAKE_TYPE_FULL: return mTimerFull;
                case WAKE_TYPE_PARTIAL: return mTimerPartial;
                case WAKE_TYPE_WINDOW: return mTimerWindow;
                case WAKE_TYPE_DRAW: return mTimerDraw;
                default: throw new IllegalArgumentException("type = " + type);
                }
            }

            public StopwatchTimer getStopwatchTimer(int type) {
                StopwatchTimer t;
                switch (type) {
                    case WAKE_TYPE_PARTIAL:
                        t = mTimerPartial;
                        if (t == null) {
                            t = new StopwatchTimer(Uid.this, WAKE_TYPE_PARTIAL,
                                    mPartialTimers, mOnBatteryScreenOffTimeBase);
                            mTimerPartial = t;
                        }
                        return t;
                    case WAKE_TYPE_FULL:
                        t = mTimerFull;
                        if (t == null) {
                            t = new StopwatchTimer(Uid.this, WAKE_TYPE_FULL,
                                    mFullTimers, mOnBatteryTimeBase);
                            mTimerFull = t;
                        }
                        return t;
                    case WAKE_TYPE_WINDOW:
                        t = mTimerWindow;
                        if (t == null) {
                            t = new StopwatchTimer(Uid.this, WAKE_TYPE_WINDOW,
                                    mWindowTimers, mOnBatteryTimeBase);
                            mTimerWindow = t;
                        }
                        return t;
                    case WAKE_TYPE_DRAW:
                        t = mTimerDraw;
                        if (t == null) {
                            t = new StopwatchTimer(Uid.this, WAKE_TYPE_DRAW,
                                    mDrawTimers, mOnBatteryTimeBase);
                            mTimerDraw = t;
                        }
                        return t;
                    default:
                        throw new IllegalArgumentException("type=" + type);
                }
            }
        }

        public final class Sensor extends BatteryStats.Uid.Sensor {
            final int mHandle;
            StopwatchTimer mTimer;

            public Sensor(int handle) {
                mHandle = handle;
            }

            private StopwatchTimer readTimerFromParcel(TimeBase timeBase, Parcel in) {
                if (in.readInt() == 0) {
                    return null;
                }

                ArrayList<StopwatchTimer> pool = mSensorTimers.get(mHandle);
                if (pool == null) {
                    pool = new ArrayList<StopwatchTimer>();
                    mSensorTimers.put(mHandle, pool);
                }
                return new StopwatchTimer(Uid.this, 0, pool, timeBase, in);
            }

            boolean reset() {
                if (mTimer.reset(true)) {
                    mTimer = null;
                    return true;
                }
                return false;
            }

            void readFromParcelLocked(TimeBase timeBase, Parcel in) {
                mTimer = readTimerFromParcel(timeBase, in);
            }

            void writeToParcelLocked(Parcel out, long elapsedRealtimeUs) {
                Timer.writeTimerToParcel(out, mTimer, elapsedRealtimeUs);
            }

            @Override
            public Timer getSensorTime() {
                return mTimer;
            }

            @Override
            public int getHandle() {
                return mHandle;
            }
        }

        /**
         * The statistics associated with a particular process.
         */
        public final class Proc extends BatteryStats.Uid.Proc implements TimeBaseObs {
            /**
             * The name of this process.
             */
            final String mName;

            /**
             * Remains true until removed from the stats.
             */
            boolean mActive = true;

            /**
             * Total time (in ms) spent executing in user code.
             */
            long mUserTime;

            /**
             * Total time (in ms) spent executing in kernel code.
             */
            long mSystemTime;

            /**
             * Amount of time (in ms) the process was running in the foreground.
             */
            long mForegroundTime;

            /**
             * Number of times the process has been started.
             */
            int mStarts;

            /**
             * Number of times the process has crashed.
             */
            int mNumCrashes;

            /**
             * Number of times the process has had an ANR.
             */
            int mNumAnrs;

            /**
             * The amount of user time loaded from a previous save.
             */
            long mLoadedUserTime;

            /**
             * The amount of system time loaded from a previous save.
             */
            long mLoadedSystemTime;

            /**
             * The amount of foreground time loaded from a previous save.
             */
            long mLoadedForegroundTime;

            /**
             * The number of times the process has started from a previous save.
             */
            int mLoadedStarts;

            /**
             * Number of times the process has crashed from a previous save.
             */
            int mLoadedNumCrashes;

            /**
             * Number of times the process has had an ANR from a previous save.
             */
            int mLoadedNumAnrs;

            /**
             * The amount of user time when last unplugged.
             */
            long mUnpluggedUserTime;

            /**
             * The amount of system time when last unplugged.
             */
            long mUnpluggedSystemTime;

            /**
             * The amount of foreground time since unplugged.
             */
            long mUnpluggedForegroundTime;

            /**
             * The number of times the process has started before unplugged.
             */
            int mUnpluggedStarts;

            /**
             * Number of times the process has crashed before unplugged.
             */
            int mUnpluggedNumCrashes;

            /**
             * Number of times the process has had an ANR before unplugged.
             */
            int mUnpluggedNumAnrs;

            ArrayList<ExcessivePower> mExcessivePower;

            Proc(String name) {
                mName = name;
                mOnBatteryTimeBase.add(this);
            }

            public void onTimeStarted(long elapsedRealtime, long baseUptime, long baseRealtime) {
                mUnpluggedUserTime = mUserTime;
                mUnpluggedSystemTime = mSystemTime;
                mUnpluggedForegroundTime = mForegroundTime;
                mUnpluggedStarts = mStarts;
                mUnpluggedNumCrashes = mNumCrashes;
                mUnpluggedNumAnrs = mNumAnrs;
            }

            public void onTimeStopped(long elapsedRealtime, long baseUptime, long baseRealtime) {
            }

            void detach() {
                mActive = false;
                mOnBatteryTimeBase.remove(this);
            }

            public int countExcessivePowers() {
                return mExcessivePower != null ? mExcessivePower.size() : 0;
            }

            public ExcessivePower getExcessivePower(int i) {
                if (mExcessivePower != null) {
                    return mExcessivePower.get(i);
                }
                return null;
            }

            public void addExcessiveWake(long overTime, long usedTime) {
                if (mExcessivePower == null) {
                    mExcessivePower = new ArrayList<ExcessivePower>();
                }
                ExcessivePower ew = new ExcessivePower();
                ew.type = ExcessivePower.TYPE_WAKE;
                ew.overTime = overTime;
                ew.usedTime = usedTime;
                mExcessivePower.add(ew);
            }

            public void addExcessiveCpu(long overTime, long usedTime) {
                if (mExcessivePower == null) {
                    mExcessivePower = new ArrayList<ExcessivePower>();
                }
                ExcessivePower ew = new ExcessivePower();
                ew.type = ExcessivePower.TYPE_CPU;
                ew.overTime = overTime;
                ew.usedTime = usedTime;
                mExcessivePower.add(ew);
            }

            void writeExcessivePowerToParcelLocked(Parcel out) {
                if (mExcessivePower == null) {
                    out.writeInt(0);
                    return;
                }

                final int N = mExcessivePower.size();
                out.writeInt(N);
                for (int i=0; i<N; i++) {
                    ExcessivePower ew = mExcessivePower.get(i);
                    out.writeInt(ew.type);
                    out.writeLong(ew.overTime);
                    out.writeLong(ew.usedTime);
                }
            }

            void readExcessivePowerFromParcelLocked(Parcel in) {
                final int N = in.readInt();
                if (N == 0) {
                    mExcessivePower = null;
                    return;
                }

                if (N > 10000) {
                    throw new ParcelFormatException(
                            "File corrupt: too many excessive power entries " + N);
                }

                mExcessivePower = new ArrayList<>();
                for (int i=0; i<N; i++) {
                    ExcessivePower ew = new ExcessivePower();
                    ew.type = in.readInt();
                    ew.overTime = in.readLong();
                    ew.usedTime = in.readLong();
                    mExcessivePower.add(ew);
                }
            }

            void writeToParcelLocked(Parcel out) {
                out.writeLong(mUserTime);
                out.writeLong(mSystemTime);
                out.writeLong(mForegroundTime);
                out.writeInt(mStarts);
                out.writeInt(mNumCrashes);
                out.writeInt(mNumAnrs);
                out.writeLong(mLoadedUserTime);
                out.writeLong(mLoadedSystemTime);
                out.writeLong(mLoadedForegroundTime);
                out.writeInt(mLoadedStarts);
                out.writeInt(mLoadedNumCrashes);
                out.writeInt(mLoadedNumAnrs);
                out.writeLong(mUnpluggedUserTime);
                out.writeLong(mUnpluggedSystemTime);
                out.writeLong(mUnpluggedForegroundTime);
                out.writeInt(mUnpluggedStarts);
                out.writeInt(mUnpluggedNumCrashes);
                out.writeInt(mUnpluggedNumAnrs);
                writeExcessivePowerToParcelLocked(out);
            }

            void readFromParcelLocked(Parcel in) {
                mUserTime = in.readLong();
                mSystemTime = in.readLong();
                mForegroundTime = in.readLong();
                mStarts = in.readInt();
                mNumCrashes = in.readInt();
                mNumAnrs = in.readInt();
                mLoadedUserTime = in.readLong();
                mLoadedSystemTime = in.readLong();
                mLoadedForegroundTime = in.readLong();
                mLoadedStarts = in.readInt();
                mLoadedNumCrashes = in.readInt();
                mLoadedNumAnrs = in.readInt();
                mUnpluggedUserTime = in.readLong();
                mUnpluggedSystemTime = in.readLong();
                mUnpluggedForegroundTime = in.readLong();
                mUnpluggedStarts = in.readInt();
                mUnpluggedNumCrashes = in.readInt();
                mUnpluggedNumAnrs = in.readInt();
                readExcessivePowerFromParcelLocked(in);
            }

            public void addCpuTimeLocked(int utime, int stime) {
                mUserTime += utime;
                mSystemTime += stime;
            }

            public void addForegroundTimeLocked(long ttime) {
                mForegroundTime += ttime;
            }

            public void incStartsLocked() {
                mStarts++;
            }

            public void incNumCrashesLocked() {
                mNumCrashes++;
            }

            public void incNumAnrsLocked() {
                mNumAnrs++;
            }

            @Override
            public boolean isActive() {
                return mActive;
            }

            @Override
            public long getUserTime(int which) {
                long val = mUserTime;
                if (which == STATS_CURRENT) {
                    val -= mLoadedUserTime;
                } else if (which == STATS_SINCE_UNPLUGGED) {
                    val -= mUnpluggedUserTime;
                }
                return val;
            }

            @Override
            public long getSystemTime(int which) {
                long val = mSystemTime;
                if (which == STATS_CURRENT) {
                    val -= mLoadedSystemTime;
                } else if (which == STATS_SINCE_UNPLUGGED) {
                    val -= mUnpluggedSystemTime;
                }
                return val;
            }

            @Override
            public long getForegroundTime(int which) {
                long val = mForegroundTime;
                if (which == STATS_CURRENT) {
                    val -= mLoadedForegroundTime;
                } else if (which == STATS_SINCE_UNPLUGGED) {
                    val -= mUnpluggedForegroundTime;
                }
                return val;
            }

            @Override
            public int getStarts(int which) {
                int val = mStarts;
                if (which == STATS_CURRENT) {
                    val -= mLoadedStarts;
                } else if (which == STATS_SINCE_UNPLUGGED) {
                    val -= mUnpluggedStarts;
                }
                return val;
            }

            @Override
            public int getNumCrashes(int which) {
                int val = mNumCrashes;
                if (which == STATS_CURRENT) {
                    val -= mLoadedNumCrashes;
                } else if (which == STATS_SINCE_UNPLUGGED) {
                    val -= mUnpluggedNumCrashes;
                }
                return val;
            }

            @Override
            public int getNumAnrs(int which) {
                int val = mNumAnrs;
                if (which == STATS_CURRENT) {
                    val -= mLoadedNumAnrs;
                } else if (which == STATS_SINCE_UNPLUGGED) {
                    val -= mUnpluggedNumAnrs;
                }
                return val;
            }
        }

        /**
         * The statistics associated with a particular package.
         */
        public final class Pkg extends BatteryStats.Uid.Pkg implements TimeBaseObs {
            /**
             * Number of times wakeup alarms have occurred for this app.
             */
            ArrayMap<String, Counter> mWakeupAlarms = new ArrayMap<>();

            /**
             * The statics we have collected for this package's services.
             */
            final ArrayMap<String, Serv> mServiceStats = new ArrayMap<>();

            Pkg() {
                mOnBatteryScreenOffTimeBase.add(this);
            }

            public void onTimeStarted(long elapsedRealtime, long baseUptime, long baseRealtime) {
            }

            public void onTimeStopped(long elapsedRealtime, long baseUptime, long baseRealtime) {
            }

            void detach() {
                mOnBatteryScreenOffTimeBase.remove(this);
            }

            void readFromParcelLocked(Parcel in) {
                int numWA = in.readInt();
                mWakeupAlarms.clear();
                for (int i=0; i<numWA; i++) {
                    String tag = in.readString();
                    mWakeupAlarms.put(tag, new Counter(mOnBatteryTimeBase, in));
                }

                int numServs = in.readInt();
                mServiceStats.clear();
                for (int m = 0; m < numServs; m++) {
                    String serviceName = in.readString();
                    Uid.Pkg.Serv serv = new Serv();
                    mServiceStats.put(serviceName, serv);

                    serv.readFromParcelLocked(in);
                }
            }

            void writeToParcelLocked(Parcel out) {
                int numWA = mWakeupAlarms.size();
                out.writeInt(numWA);
                for (int i=0; i<numWA; i++) {
                    out.writeString(mWakeupAlarms.keyAt(i));
                    mWakeupAlarms.valueAt(i).writeToParcel(out);
                }

                final int NS = mServiceStats.size();
                out.writeInt(NS);
                for (int i=0; i<NS; i++) {
                    out.writeString(mServiceStats.keyAt(i));
                    Uid.Pkg.Serv serv = mServiceStats.valueAt(i);
                    serv.writeToParcelLocked(out);
                }
            }

            @Override
            public ArrayMap<String, ? extends BatteryStats.Counter> getWakeupAlarmStats() {
                return mWakeupAlarms;
            }

            public void noteWakeupAlarmLocked(String tag) {
                Counter c = mWakeupAlarms.get(tag);
                if (c == null) {
                    c = new Counter(mOnBatteryTimeBase);
                    mWakeupAlarms.put(tag, c);
                }
                c.stepAtomic();
            }

            @Override
            public ArrayMap<String, ? extends BatteryStats.Uid.Pkg.Serv> getServiceStats() {
                return mServiceStats;
            }

            /**
             * The statistics associated with a particular service.
             */
            public final class Serv extends BatteryStats.Uid.Pkg.Serv implements TimeBaseObs {
                /**
                 * Total time (ms in battery uptime) the service has been left started.
                 */
                long mStartTime;

                /**
                 * If service has been started and not yet stopped, this is
                 * when it was started.
                 */
                long mRunningSince;

                /**
                 * True if we are currently running.
                 */
                boolean mRunning;

                /**
                 * Total number of times startService() has been called.
                 */
                int mStarts;

                /**
                 * Total time (ms in battery uptime) the service has been left launched.
                 */
                long mLaunchedTime;

                /**
                 * If service has been launched and not yet exited, this is
                 * when it was launched (ms in battery uptime).
                 */
                long mLaunchedSince;

                /**
                 * True if we are currently launched.
                 */
                boolean mLaunched;

                /**
                 * Total number times the service has been launched.
                 */
                int mLaunches;

                /**
                 * The amount of time spent started loaded from a previous save
                 * (ms in battery uptime).
                 */
                long mLoadedStartTime;

                /**
                 * The number of starts loaded from a previous save.
                 */
                int mLoadedStarts;

                /**
                 * The number of launches loaded from a previous save.
                 */
                int mLoadedLaunches;

                /**
                 * The amount of time spent started as of the last run (ms
                 * in battery uptime).
                 */
                long mLastStartTime;

                /**
                 * The number of starts as of the last run.
                 */
                int mLastStarts;

                /**
                 * The number of launches as of the last run.
                 */
                int mLastLaunches;

                /**
                 * The amount of time spent started when last unplugged (ms
                 * in battery uptime).
                 */
                long mUnpluggedStartTime;

                /**
                 * The number of starts when last unplugged.
                 */
                int mUnpluggedStarts;

                /**
                 * The number of launches when last unplugged.
                 */
                int mUnpluggedLaunches;

                Serv() {
                    mOnBatteryTimeBase.add(this);
                }

                public void onTimeStarted(long elapsedRealtime, long baseUptime,
                        long baseRealtime) {
                    mUnpluggedStartTime = getStartTimeToNowLocked(baseUptime);
                    mUnpluggedStarts = mStarts;
                    mUnpluggedLaunches = mLaunches;
                }

                public void onTimeStopped(long elapsedRealtime, long baseUptime,
                        long baseRealtime) {
                }

                void detach() {
                    mOnBatteryTimeBase.remove(this);
                }

                void readFromParcelLocked(Parcel in) {
                    mStartTime = in.readLong();
                    mRunningSince = in.readLong();
                    mRunning = in.readInt() != 0;
                    mStarts = in.readInt();
                    mLaunchedTime = in.readLong();
                    mLaunchedSince = in.readLong();
                    mLaunched = in.readInt() != 0;
                    mLaunches = in.readInt();
                    mLoadedStartTime = in.readLong();
                    mLoadedStarts = in.readInt();
                    mLoadedLaunches = in.readInt();
                    mLastStartTime = 0;
                    mLastStarts = 0;
                    mLastLaunches = 0;
                    mUnpluggedStartTime = in.readLong();
                    mUnpluggedStarts = in.readInt();
                    mUnpluggedLaunches = in.readInt();
                }

                void writeToParcelLocked(Parcel out) {
                    out.writeLong(mStartTime);
                    out.writeLong(mRunningSince);
                    out.writeInt(mRunning ? 1 : 0);
                    out.writeInt(mStarts);
                    out.writeLong(mLaunchedTime);
                    out.writeLong(mLaunchedSince);
                    out.writeInt(mLaunched ? 1 : 0);
                    out.writeInt(mLaunches);
                    out.writeLong(mLoadedStartTime);
                    out.writeInt(mLoadedStarts);
                    out.writeInt(mLoadedLaunches);
                    out.writeLong(mUnpluggedStartTime);
                    out.writeInt(mUnpluggedStarts);
                    out.writeInt(mUnpluggedLaunches);
                }

                long getLaunchTimeToNowLocked(long batteryUptime) {
                    if (!mLaunched) return mLaunchedTime;
                    return mLaunchedTime + batteryUptime - mLaunchedSince;
                }

                long getStartTimeToNowLocked(long batteryUptime) {
                    if (!mRunning) return mStartTime;
                    return mStartTime + batteryUptime - mRunningSince;
                }

                public void startLaunchedLocked() {
                    if (!mLaunched) {
                        mLaunches++;
                        mLaunchedSince = getBatteryUptimeLocked();
                        mLaunched = true;
                    }
                }

                public void stopLaunchedLocked() {
                    if (mLaunched) {
                        long time = getBatteryUptimeLocked() - mLaunchedSince;
                        if (time > 0) {
                            mLaunchedTime += time;
                        } else {
                            mLaunches--;
                        }
                        mLaunched = false;
                    }
                }

                public void startRunningLocked() {
                    if (!mRunning) {
                        mStarts++;
                        mRunningSince = getBatteryUptimeLocked();
                        mRunning = true;
                    }
                }

                public void stopRunningLocked() {
                    if (mRunning) {
                        long time = getBatteryUptimeLocked() - mRunningSince;
                        if (time > 0) {
                            mStartTime += time;
                        } else {
                            mStarts--;
                        }
                        mRunning = false;
                    }
                }

                public BatteryStatsImpl getBatteryStats() {
                    return BatteryStatsImpl.this;
                }

                @Override
                public int getLaunches(int which) {
                    int val = mLaunches;
                    if (which == STATS_CURRENT) {
                        val -= mLoadedLaunches;
                    } else if (which == STATS_SINCE_UNPLUGGED) {
                        val -= mUnpluggedLaunches;
                    }
                    return val;
                }

                @Override
                public long getStartTime(long now, int which) {
                    long val = getStartTimeToNowLocked(now);
                    if (which == STATS_CURRENT) {
                        val -= mLoadedStartTime;
                    } else if (which == STATS_SINCE_UNPLUGGED) {
                        val -= mUnpluggedStartTime;
                    }
                    return val;
                }

                @Override
                public int getStarts(int which) {
                    int val = mStarts;
                    if (which == STATS_CURRENT) {
                        val -= mLoadedStarts;
                    } else if (which == STATS_SINCE_UNPLUGGED) {
                        val -= mUnpluggedStarts;
                    }

                    return val;
                }
            }

            final Serv newServiceStatsLocked() {
                return new Serv();
            }
        }

        /**
         * Retrieve the statistics object for a particular process, creating
         * if needed.
         */
        public Proc getProcessStatsLocked(String name) {
            Proc ps = mProcessStats.get(name);
            if (ps == null) {
                ps = new Proc(name);
                mProcessStats.put(name, ps);
            }

            return ps;
        }

        public void updateUidProcessStateLocked(int procState) {
            int uidRunningState;
            if (procState == ActivityManager.PROCESS_STATE_NONEXISTENT) {
                uidRunningState = ActivityManager.PROCESS_STATE_NONEXISTENT;
            } else if (procState == ActivityManager.PROCESS_STATE_TOP) {
                uidRunningState = PROCESS_STATE_TOP;
            } else if (procState <= ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE) {
                // Persistent and other foreground states go here.
                uidRunningState = PROCESS_STATE_FOREGROUND_SERVICE;
            } else if (procState <= ActivityManager.PROCESS_STATE_TOP_SLEEPING) {
                uidRunningState = PROCESS_STATE_TOP_SLEEPING;
            } else if (procState <= ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND) {
                // Persistent and other foreground states go here.
                uidRunningState = PROCESS_STATE_FOREGROUND;
            } else if (procState <= ActivityManager.PROCESS_STATE_RECEIVER) {
                uidRunningState = PROCESS_STATE_BACKGROUND;
            } else {
                uidRunningState = PROCESS_STATE_CACHED;
            }

            if (mProcessState == uidRunningState) return;

            final long elapsedRealtime = SystemClock.elapsedRealtime();

            if (mProcessState != ActivityManager.PROCESS_STATE_NONEXISTENT) {
                mProcessStateTimer[mProcessState].stopRunningLocked(elapsedRealtime);
            }
            mProcessState = uidRunningState;
            if (uidRunningState != ActivityManager.PROCESS_STATE_NONEXISTENT) {
                if (mProcessStateTimer[uidRunningState] == null) {
                    makeProcessState(uidRunningState, null);
                }
                mProcessStateTimer[uidRunningState].startRunningLocked(elapsedRealtime);
            }
        }

        public SparseArray<? extends Pid> getPidStats() {
            return mPids;
        }

        public Pid getPidStatsLocked(int pid) {
            Pid p = mPids.get(pid);
            if (p == null) {
                p = new Pid();
                mPids.put(pid, p);
            }
            return p;
        }

        /**
         * Retrieve the statistics object for a particular service, creating
         * if needed.
         */
        public Pkg getPackageStatsLocked(String name) {
            Pkg ps = mPackageStats.get(name);
            if (ps == null) {
                ps = new Pkg();
                mPackageStats.put(name, ps);
            }

            return ps;
        }

        /**
         * Retrieve the statistics object for a particular service, creating
         * if needed.
         */
        public Pkg.Serv getServiceStatsLocked(String pkg, String serv) {
            Pkg ps = getPackageStatsLocked(pkg);
            Pkg.Serv ss = ps.mServiceStats.get(serv);
            if (ss == null) {
                ss = ps.newServiceStatsLocked();
                ps.mServiceStats.put(serv, ss);
            }

            return ss;
        }

        public void readSyncSummaryFromParcelLocked(String name, Parcel in) {
            StopwatchTimer timer = mSyncStats.instantiateObject();
            timer.readSummaryFromParcelLocked(in);
            mSyncStats.add(name, timer);
        }

        public void readJobSummaryFromParcelLocked(String name, Parcel in) {
            StopwatchTimer timer = mJobStats.instantiateObject();
            timer.readSummaryFromParcelLocked(in);
            mJobStats.add(name, timer);
        }

        public void readWakeSummaryFromParcelLocked(String wlName, Parcel in) {
            Wakelock wl = new Wakelock();
            mWakelockStats.add(wlName, wl);
            if (in.readInt() != 0) {
                wl.getStopwatchTimer(WAKE_TYPE_FULL).readSummaryFromParcelLocked(in);
            }
            if (in.readInt() != 0) {
                wl.getStopwatchTimer(WAKE_TYPE_PARTIAL).readSummaryFromParcelLocked(in);
            }
            if (in.readInt() != 0) {
                wl.getStopwatchTimer(WAKE_TYPE_WINDOW).readSummaryFromParcelLocked(in);
            }
            if (in.readInt() != 0) {
                wl.getStopwatchTimer(WAKE_TYPE_DRAW).readSummaryFromParcelLocked(in);
            }
        }

        public StopwatchTimer getSensorTimerLocked(int sensor, boolean create) {
            Sensor se = mSensorStats.get(sensor);
            if (se == null) {
                if (!create) {
                    return null;
                }
                se = new Sensor(sensor);
                mSensorStats.put(sensor, se);
            }
            StopwatchTimer t = se.mTimer;
            if (t != null) {
                return t;
            }
            ArrayList<StopwatchTimer> timers = mSensorTimers.get(sensor);
            if (timers == null) {
                timers = new ArrayList<StopwatchTimer>();
                mSensorTimers.put(sensor, timers);
            }
            t = new StopwatchTimer(Uid.this, BatteryStats.SENSOR, timers, mOnBatteryTimeBase);
            se.mTimer = t;
            return t;
        }

        public void noteStartSyncLocked(String name, long elapsedRealtimeMs) {
            StopwatchTimer t = mSyncStats.startObject(name);
            if (t != null) {
                t.startRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteStopSyncLocked(String name, long elapsedRealtimeMs) {
            StopwatchTimer t = mSyncStats.stopObject(name);
            if (t != null) {
                t.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteStartJobLocked(String name, long elapsedRealtimeMs) {
            StopwatchTimer t = mJobStats.startObject(name);
            if (t != null) {
                t.startRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteStopJobLocked(String name, long elapsedRealtimeMs) {
            StopwatchTimer t = mJobStats.stopObject(name);
            if (t != null) {
                t.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteStartWakeLocked(int pid, String name, int type, long elapsedRealtimeMs) {
            Wakelock wl = mWakelockStats.startObject(name);
            if (wl != null) {
                wl.getStopwatchTimer(type).startRunningLocked(elapsedRealtimeMs);
            }
            if (pid >= 0 && type == WAKE_TYPE_PARTIAL) {
                Pid p = getPidStatsLocked(pid);
                if (p.mWakeNesting++ == 0) {
                    p.mWakeStartMs = elapsedRealtimeMs;
                }
            }
        }

        public void noteStopWakeLocked(int pid, String name, int type, long elapsedRealtimeMs) {
            Wakelock wl = mWakelockStats.stopObject(name);
            if (wl != null) {
                wl.getStopwatchTimer(type).stopRunningLocked(elapsedRealtimeMs);
            }
            if (pid >= 0 && type == WAKE_TYPE_PARTIAL) {
                Pid p = mPids.get(pid);
                if (p != null && p.mWakeNesting > 0) {
                    if (p.mWakeNesting-- == 1) {
                        p.mWakeSumMs += elapsedRealtimeMs - p.mWakeStartMs;
                        p.mWakeStartMs = 0;
                    }
                }
            }
        }

        public void reportExcessiveWakeLocked(String proc, long overTime, long usedTime) {
            Proc p = getProcessStatsLocked(proc);
            if (p != null) {
                p.addExcessiveWake(overTime, usedTime);
            }
        }

        public void reportExcessiveCpuLocked(String proc, long overTime, long usedTime) {
            Proc p = getProcessStatsLocked(proc);
            if (p != null) {
                p.addExcessiveCpu(overTime, usedTime);
            }
        }

        public void noteStartSensor(int sensor, long elapsedRealtimeMs) {
            StopwatchTimer t = getSensorTimerLocked(sensor, true);
            if (t != null) {
                t.startRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteStopSensor(int sensor, long elapsedRealtimeMs) {
            // Don't create a timer if one doesn't already exist
            StopwatchTimer t = getSensorTimerLocked(sensor, false);
            if (t != null) {
                t.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteStartGps(long elapsedRealtimeMs) {
            StopwatchTimer t = getSensorTimerLocked(Sensor.GPS, true);
            if (t != null) {
                t.startRunningLocked(elapsedRealtimeMs);
            }
        }

        public void noteStopGps(long elapsedRealtimeMs) {
            StopwatchTimer t = getSensorTimerLocked(Sensor.GPS, false);
            if (t != null) {
                t.stopRunningLocked(elapsedRealtimeMs);
            }
        }

        public BatteryStatsImpl getBatteryStats() {
            return BatteryStatsImpl.this;
        }
    }

    public BatteryStatsImpl(File systemDir, Handler handler, ExternalStatsSync externalSync) {
        if (systemDir != null) {
            mFile = new JournaledFile(new File(systemDir, "batterystats.bin"),
                    new File(systemDir, "batterystats.bin.tmp"));
        } else {
            mFile = null;
        }
        mCheckinFile = new AtomicFile(new File(systemDir, "batterystats-checkin.bin"));
        mDailyFile = new AtomicFile(new File(systemDir, "batterystats-daily.xml"));
        mExternalSync = externalSync;
        mHandler = new MyHandler(handler.getLooper());
        mStartCount++;
        mScreenOnTimer = new StopwatchTimer(null, -1, null, mOnBatteryTimeBase);
        for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
            mScreenBrightnessTimer[i] = new StopwatchTimer(null, -100-i, null, mOnBatteryTimeBase);
        }
        mInteractiveTimer = new StopwatchTimer(null, -10, null, mOnBatteryTimeBase);
        mPowerSaveModeEnabledTimer = new StopwatchTimer(null, -2, null, mOnBatteryTimeBase);
        mDeviceIdleModeLightTimer = new StopwatchTimer(null, -11, null, mOnBatteryTimeBase);
        mDeviceIdleModeFullTimer = new StopwatchTimer(null, -14, null, mOnBatteryTimeBase);
        mDeviceLightIdlingTimer = new StopwatchTimer(null, -15, null, mOnBatteryTimeBase);
        mDeviceIdlingTimer = new StopwatchTimer(null, -12, null, mOnBatteryTimeBase);
        mPhoneOnTimer = new StopwatchTimer(null, -3, null, mOnBatteryTimeBase);
        for (int i=0; i<SignalStrength.NUM_SIGNAL_STRENGTH_BINS; i++) {
            mPhoneSignalStrengthsTimer[i] = new StopwatchTimer(null, -200-i, null,
                    mOnBatteryTimeBase);
        }
        mPhoneSignalScanningTimer = new StopwatchTimer(null, -200+1, null, mOnBatteryTimeBase);
        for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
            mPhoneDataConnectionsTimer[i] = new StopwatchTimer(null, -300-i, null,
                    mOnBatteryTimeBase);
        }
        for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
            mNetworkByteActivityCounters[i] = new LongSamplingCounter(mOnBatteryTimeBase);
            mNetworkPacketActivityCounters[i] = new LongSamplingCounter(mOnBatteryTimeBase);
        }
        mWifiActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase, NUM_WIFI_TX_LEVELS);
        mBluetoothActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                NUM_BT_TX_LEVELS);
        mModemActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                ModemActivityInfo.TX_POWER_LEVELS);

        mMobileRadioActiveTimer = new StopwatchTimer(null, -400, null, mOnBatteryTimeBase);
        mMobileRadioActivePerAppTimer = new StopwatchTimer(null, -401, null, mOnBatteryTimeBase);
        mMobileRadioActiveAdjustedTime = new LongSamplingCounter(mOnBatteryTimeBase);
        mMobileRadioActiveUnknownTime = new LongSamplingCounter(mOnBatteryTimeBase);
        mMobileRadioActiveUnknownCount = new LongSamplingCounter(mOnBatteryTimeBase);
        mWifiOnTimer = new StopwatchTimer(null, -4, null, mOnBatteryTimeBase);
        mGlobalWifiRunningTimer = new StopwatchTimer(null, -5, null, mOnBatteryTimeBase);
        for (int i=0; i<NUM_WIFI_STATES; i++) {
            mWifiStateTimer[i] = new StopwatchTimer(null, -600-i, null, mOnBatteryTimeBase);
        }
        for (int i=0; i<NUM_WIFI_SUPPL_STATES; i++) {
            mWifiSupplStateTimer[i] = new StopwatchTimer(null, -700-i, null, mOnBatteryTimeBase);
        }
        for (int i=0; i<NUM_WIFI_SIGNAL_STRENGTH_BINS; i++) {
            mWifiSignalStrengthsTimer[i] = new StopwatchTimer(null, -800-i, null,
                    mOnBatteryTimeBase);
        }
        mAudioOnTimer = new StopwatchTimer(null, -7, null, mOnBatteryTimeBase);
        mVideoOnTimer = new StopwatchTimer(null, -8, null, mOnBatteryTimeBase);
        mFlashlightOnTimer = new StopwatchTimer(null, -9, null, mOnBatteryTimeBase);
        mCameraOnTimer = new StopwatchTimer(null, -13, null, mOnBatteryTimeBase);
        mBluetoothScanTimer = new StopwatchTimer(null, -14, null, mOnBatteryTimeBase);
        mOnBattery = mOnBatteryInternal = false;
        long uptime = SystemClock.uptimeMillis() * 1000;
        long realtime = SystemClock.elapsedRealtime() * 1000;
        initTimes(uptime, realtime);
        mStartPlatformVersion = mEndPlatformVersion = Build.ID;
        mDischargeStartLevel = 0;
        mDischargeUnplugLevel = 0;
        mDischargePlugLevel = -1;
        mDischargeCurrentLevel = 0;
        mCurrentBatteryLevel = 0;
        initDischarge();
        clearHistoryLocked();
        updateDailyDeadlineLocked();
    }

    public BatteryStatsImpl(Parcel p) {
        mFile = null;
        mCheckinFile = null;
        mDailyFile = null;
        mHandler = null;
        mExternalSync = null;
        clearHistoryLocked();
        readFromParcel(p);
    }

    public void setPowerProfile(PowerProfile profile) {
        synchronized (this) {
            mPowerProfile = profile;

            // We need to initialize the KernelCpuSpeedReaders to read from
            // the first cpu of each core. Once we have the PowerProfile, we have access to this
            // information.
            final int numClusters = mPowerProfile.getNumCpuClusters();
            mKernelCpuSpeedReaders = new KernelCpuSpeedReader[numClusters];
            int firstCpuOfCluster = 0;
            for (int i = 0; i < numClusters; i++) {
                final int numSpeedSteps = mPowerProfile.getNumSpeedStepsInCpuCluster(i);
                mKernelCpuSpeedReaders[i] = new KernelCpuSpeedReader(firstCpuOfCluster,
                        numSpeedSteps);
                firstCpuOfCluster += mPowerProfile.getNumCoresInCpuCluster(i);
            }
        }
    }

    public void setCallback(BatteryCallback cb) {
        mCallback = cb;
    }

    public void setRadioScanningTimeout(long timeout) {
        if (mPhoneSignalScanningTimer != null) {
            mPhoneSignalScanningTimer.setTimeout(timeout);
        }
    }

    public void updateDailyDeadlineLocked() {
        // Get the current time.
        long currentTime = mDailyStartTime = System.currentTimeMillis();
        Calendar calDeadline = Calendar.getInstance();
        calDeadline.setTimeInMillis(currentTime);

        // Move time up to the next day, ranging from 1am to 3pm.
        calDeadline.set(Calendar.DAY_OF_YEAR, calDeadline.get(Calendar.DAY_OF_YEAR) + 1);
        calDeadline.set(Calendar.MILLISECOND, 0);
        calDeadline.set(Calendar.SECOND, 0);
        calDeadline.set(Calendar.MINUTE, 0);
        calDeadline.set(Calendar.HOUR_OF_DAY, 1);
        mNextMinDailyDeadline = calDeadline.getTimeInMillis();
        calDeadline.set(Calendar.HOUR_OF_DAY, 3);
        mNextMaxDailyDeadline = calDeadline.getTimeInMillis();
    }

    public void recordDailyStatsIfNeededLocked(boolean settled) {
        long currentTime = System.currentTimeMillis();
        if (currentTime >= mNextMaxDailyDeadline) {
            recordDailyStatsLocked();
        } else if (settled && currentTime >= mNextMinDailyDeadline) {
            recordDailyStatsLocked();
        } else if (currentTime < (mDailyStartTime-(1000*60*60*24))) {
            recordDailyStatsLocked();
        }
    }

    public void recordDailyStatsLocked() {
        DailyItem item = new DailyItem();
        item.mStartTime = mDailyStartTime;
        item.mEndTime = System.currentTimeMillis();
        boolean hasData = false;
        if (mDailyDischargeStepTracker.mNumStepDurations > 0) {
            hasData = true;
            item.mDischargeSteps = new LevelStepTracker(
                    mDailyDischargeStepTracker.mNumStepDurations,
                    mDailyDischargeStepTracker.mStepDurations);
        }
        if (mDailyChargeStepTracker.mNumStepDurations > 0) {
            hasData = true;
            item.mChargeSteps = new LevelStepTracker(
                    mDailyChargeStepTracker.mNumStepDurations,
                    mDailyChargeStepTracker.mStepDurations);
        }
        if (mDailyPackageChanges != null) {
            hasData = true;
            item.mPackageChanges = mDailyPackageChanges;
            mDailyPackageChanges = null;
        }
        mDailyDischargeStepTracker.init();
        mDailyChargeStepTracker.init();
        updateDailyDeadlineLocked();

        if (hasData) {
            mDailyItems.add(item);
            while (mDailyItems.size() > MAX_DAILY_ITEMS) {
                mDailyItems.remove(0);
            }
            final ByteArrayOutputStream memStream = new ByteArrayOutputStream();
            try {
                XmlSerializer out = new FastXmlSerializer();
                out.setOutput(memStream, StandardCharsets.UTF_8.name());
                writeDailyItemsLocked(out);
                BackgroundThread.getHandler().post(new Runnable() {
                    @Override
                    public void run() {
                        synchronized (mCheckinFile) {
                            FileOutputStream stream = null;
                            try {
                                stream = mDailyFile.startWrite();
                                memStream.writeTo(stream);
                                stream.flush();
                                FileUtils.sync(stream);
                                stream.close();
                                mDailyFile.finishWrite(stream);
                            } catch (IOException e) {
                                Slog.w("BatteryStats",
                                        "Error writing battery daily items", e);
                                mDailyFile.failWrite(stream);
                            }
                        }
                    }
                });
            } catch (IOException e) {
            }
        }
    }

    private void writeDailyItemsLocked(XmlSerializer out) throws IOException {
        StringBuilder sb = new StringBuilder(64);
        out.startDocument(null, true);
        out.startTag(null, "daily-items");
        for (int i=0; i<mDailyItems.size(); i++) {
            final DailyItem dit = mDailyItems.get(i);
            out.startTag(null, "item");
            out.attribute(null, "start", Long.toString(dit.mStartTime));
            out.attribute(null, "end", Long.toString(dit.mEndTime));
            writeDailyLevelSteps(out, "dis", dit.mDischargeSteps, sb);
            writeDailyLevelSteps(out, "chg", dit.mChargeSteps, sb);
            if (dit.mPackageChanges != null) {
                for (int j=0; j<dit.mPackageChanges.size(); j++) {
                    PackageChange pc = dit.mPackageChanges.get(j);
                    if (pc.mUpdate) {
                        out.startTag(null, "upd");
                        out.attribute(null, "pkg", pc.mPackageName);
                        out.attribute(null, "ver", Integer.toString(pc.mVersionCode));
                        out.endTag(null, "upd");
                    } else {
                        out.startTag(null, "rem");
                        out.attribute(null, "pkg", pc.mPackageName);
                        out.endTag(null, "rem");
                    }
                }
            }
            out.endTag(null, "item");
        }
        out.endTag(null, "daily-items");
        out.endDocument();
    }

    private void writeDailyLevelSteps(XmlSerializer out, String tag, LevelStepTracker steps,
            StringBuilder tmpBuilder) throws IOException {
        if (steps != null) {
            out.startTag(null, tag);
            out.attribute(null, "n", Integer.toString(steps.mNumStepDurations));
            for (int i=0; i<steps.mNumStepDurations; i++) {
                out.startTag(null, "s");
                tmpBuilder.setLength(0);
                steps.encodeEntryAt(i, tmpBuilder);
                out.attribute(null, "v", tmpBuilder.toString());
                out.endTag(null, "s");
            }
            out.endTag(null, tag);
        }
    }

    public void readDailyStatsLocked() {
        Slog.d(TAG, "Reading daily items from " + mDailyFile.getBaseFile());
        mDailyItems.clear();
        FileInputStream stream;
        try {
            stream = mDailyFile.openRead();
        } catch (FileNotFoundException e) {
            return;
        }
        try {
            XmlPullParser parser = Xml.newPullParser();
            parser.setInput(stream, StandardCharsets.UTF_8.name());
            readDailyItemsLocked(parser);
        } catch (XmlPullParserException e) {
        } finally {
            try {
                stream.close();
            } catch (IOException e) {
            }
        }
    }

    private void readDailyItemsLocked(XmlPullParser parser) {
        try {
            int type;
            while ((type = parser.next()) != XmlPullParser.START_TAG
                    && type != XmlPullParser.END_DOCUMENT) {
                ;
            }

            if (type != XmlPullParser.START_TAG) {
                throw new IllegalStateException("no start tag found");
            }

            int outerDepth = parser.getDepth();
            while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
                    && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
                if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
                    continue;
                }

                String tagName = parser.getName();
                if (tagName.equals("item")) {
                    readDailyItemTagLocked(parser);
                } else {
                    Slog.w(TAG, "Unknown element under <daily-items>: "
                            + parser.getName());
                    XmlUtils.skipCurrentTag(parser);
                }
            }

        } catch (IllegalStateException e) {
            Slog.w(TAG, "Failed parsing daily " + e);
        } catch (NullPointerException e) {
            Slog.w(TAG, "Failed parsing daily " + e);
        } catch (NumberFormatException e) {
            Slog.w(TAG, "Failed parsing daily " + e);
        } catch (XmlPullParserException e) {
            Slog.w(TAG, "Failed parsing daily " + e);
        } catch (IOException e) {
            Slog.w(TAG, "Failed parsing daily " + e);
        } catch (IndexOutOfBoundsException e) {
            Slog.w(TAG, "Failed parsing daily " + e);
        }
    }

    void readDailyItemTagLocked(XmlPullParser parser) throws NumberFormatException,
            XmlPullParserException, IOException {
        DailyItem dit = new DailyItem();
        String attr = parser.getAttributeValue(null, "start");
        if (attr != null) {
            dit.mStartTime = Long.parseLong(attr);
        }
        attr = parser.getAttributeValue(null, "end");
        if (attr != null) {
            dit.mEndTime = Long.parseLong(attr);
        }
        int outerDepth = parser.getDepth();
        int type;
        while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
                && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
            if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
                continue;
            }

            String tagName = parser.getName();
            if (tagName.equals("dis")) {
                readDailyItemTagDetailsLocked(parser, dit, false, "dis");
            } else if (tagName.equals("chg")) {
                readDailyItemTagDetailsLocked(parser, dit, true, "chg");
            } else if (tagName.equals("upd")) {
                if (dit.mPackageChanges == null) {
                    dit.mPackageChanges = new ArrayList<>();
                }
                PackageChange pc = new PackageChange();
                pc.mUpdate = true;
                pc.mPackageName = parser.getAttributeValue(null, "pkg");
                String verStr = parser.getAttributeValue(null, "ver");
                pc.mVersionCode = verStr != null ? Integer.parseInt(verStr) : 0;
                dit.mPackageChanges.add(pc);
                XmlUtils.skipCurrentTag(parser);
            } else if (tagName.equals("rem")) {
                if (dit.mPackageChanges == null) {
                    dit.mPackageChanges = new ArrayList<>();
                }
                PackageChange pc = new PackageChange();
                pc.mUpdate = false;
                pc.mPackageName = parser.getAttributeValue(null, "pkg");
                dit.mPackageChanges.add(pc);
                XmlUtils.skipCurrentTag(parser);
            } else {
                Slog.w(TAG, "Unknown element under <item>: "
                        + parser.getName());
                XmlUtils.skipCurrentTag(parser);
            }
        }
        mDailyItems.add(dit);
    }

    void readDailyItemTagDetailsLocked(XmlPullParser parser, DailyItem dit, boolean isCharge,
            String tag)
            throws NumberFormatException, XmlPullParserException, IOException {
        final String numAttr = parser.getAttributeValue(null, "n");
        if (numAttr == null) {
            Slog.w(TAG, "Missing 'n' attribute at " + parser.getPositionDescription());
            XmlUtils.skipCurrentTag(parser);
            return;
        }
        final int num = Integer.parseInt(numAttr);
        LevelStepTracker steps = new LevelStepTracker(num);
        if (isCharge) {
            dit.mChargeSteps = steps;
        } else {
            dit.mDischargeSteps = steps;
        }
        int i = 0;
        int outerDepth = parser.getDepth();
        int type;
        while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
                && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
            if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
                continue;
            }

            String tagName = parser.getName();
            if ("s".equals(tagName)) {
                if (i < num) {
                    String valueAttr = parser.getAttributeValue(null, "v");
                    if (valueAttr != null) {
                        steps.decodeEntryAt(i, valueAttr);
                        i++;
                    }
                }
            } else {
                Slog.w(TAG, "Unknown element under <" + tag + ">: "
                        + parser.getName());
                XmlUtils.skipCurrentTag(parser);
            }
        }
        steps.mNumStepDurations = i;
    }

    @Override
    public DailyItem getDailyItemLocked(int daysAgo) {
        int index = mDailyItems.size()-1-daysAgo;
        return index >= 0 ? mDailyItems.get(index) : null;
    }

    @Override
    public long getCurrentDailyStartTime() {
        return mDailyStartTime;
    }

    @Override
    public long getNextMinDailyDeadline() {
        return mNextMinDailyDeadline;
    }

    @Override
    public long getNextMaxDailyDeadline() {
        return mNextMaxDailyDeadline;
    }

    @Override
    public boolean startIteratingOldHistoryLocked() {
        if (DEBUG_HISTORY) Slog.i(TAG, "ITERATING: buff size=" + mHistoryBuffer.dataSize()
                + " pos=" + mHistoryBuffer.dataPosition());
        if ((mHistoryIterator = mHistory) == null) {
            return false;
        }
        mHistoryBuffer.setDataPosition(0);
        mHistoryReadTmp.clear();
        mReadOverflow = false;
        mIteratingHistory = true;
        return true;
    }

    @Override
    public boolean getNextOldHistoryLocked(HistoryItem out) {
        boolean end = mHistoryBuffer.dataPosition() >= mHistoryBuffer.dataSize();
        if (!end) {
            readHistoryDelta(mHistoryBuffer, mHistoryReadTmp);
            mReadOverflow |= mHistoryReadTmp.cmd == HistoryItem.CMD_OVERFLOW;
        }
        HistoryItem cur = mHistoryIterator;
        if (cur == null) {
            if (!mReadOverflow && !end) {
                Slog.w(TAG, "Old history ends before new history!");
            }
            return false;
        }
        out.setTo(cur);
        mHistoryIterator = cur.next;
        if (!mReadOverflow) {
            if (end) {
                Slog.w(TAG, "New history ends before old history!");
            } else if (!out.same(mHistoryReadTmp)) {
                PrintWriter pw = new FastPrintWriter(new LogWriter(android.util.Log.WARN, TAG));
                pw.println("Histories differ!");
                pw.println("Old history:");
                (new HistoryPrinter()).printNextItem(pw, out, 0, false, true);
                pw.println("New history:");
                (new HistoryPrinter()).printNextItem(pw, mHistoryReadTmp, 0, false,
                        true);
                pw.flush();
            }
        }
        return true;
    }

    @Override
    public void finishIteratingOldHistoryLocked() {
        mIteratingHistory = false;
        mHistoryBuffer.setDataPosition(mHistoryBuffer.dataSize());
        mHistoryIterator = null;
    }

    public int getHistoryTotalSize() {
        return MAX_HISTORY_BUFFER;
    }

    public int getHistoryUsedSize() {
        return mHistoryBuffer.dataSize();
    }

    @Override
    public boolean startIteratingHistoryLocked() {
        if (DEBUG_HISTORY) Slog.i(TAG, "ITERATING: buff size=" + mHistoryBuffer.dataSize()
                + " pos=" + mHistoryBuffer.dataPosition());
        if (mHistoryBuffer.dataSize() <= 0) {
            return false;
        }
        mHistoryBuffer.setDataPosition(0);
        mReadOverflow = false;
        mIteratingHistory = true;
        mReadHistoryStrings = new String[mHistoryTagPool.size()];
        mReadHistoryUids = new int[mHistoryTagPool.size()];
        mReadHistoryChars = 0;
        for (HashMap.Entry<HistoryTag, Integer> ent : mHistoryTagPool.entrySet()) {
            final HistoryTag tag = ent.getKey();
            final int idx = ent.getValue();
            mReadHistoryStrings[idx] = tag.string;
            mReadHistoryUids[idx] = tag.uid;
            mReadHistoryChars += tag.string.length() + 1;
        }
        return true;
    }

    @Override
    public int getHistoryStringPoolSize() {
        return mReadHistoryStrings.length;
    }

    @Override
    public int getHistoryStringPoolBytes() {
        // Each entry is a fixed 12 bytes: 4 for index, 4 for uid, 4 for string size
        // Each string character is 2 bytes.
        return (mReadHistoryStrings.length * 12) + (mReadHistoryChars * 2);
    }

    @Override
    public String getHistoryTagPoolString(int index) {
        return mReadHistoryStrings[index];
    }

    @Override
    public int getHistoryTagPoolUid(int index) {
        return mReadHistoryUids[index];
    }

    @Override
    public boolean getNextHistoryLocked(HistoryItem out) {
        final int pos = mHistoryBuffer.dataPosition();
        if (pos == 0) {
            out.clear();
        }
        boolean end = pos >= mHistoryBuffer.dataSize();
        if (end) {
            return false;
        }

        final long lastRealtime = out.time;
        final long lastWalltime = out.currentTime;
        readHistoryDelta(mHistoryBuffer, out);
        if (out.cmd != HistoryItem.CMD_CURRENT_TIME
                && out.cmd != HistoryItem.CMD_RESET && lastWalltime != 0) {
            out.currentTime = lastWalltime + (out.time - lastRealtime);
        }
        return true;
    }

    @Override
    public void finishIteratingHistoryLocked() {
        mIteratingHistory = false;
        mHistoryBuffer.setDataPosition(mHistoryBuffer.dataSize());
        mReadHistoryStrings = null;
    }

    @Override
    public long getHistoryBaseTime() {
        return mHistoryBaseTime;
    }

    @Override
    public int getStartCount() {
        return mStartCount;
    }

    public boolean isOnBattery() {
        return mOnBattery;
    }

    public boolean isCharging() {
        return mCharging;
    }

    public boolean isScreenOn() {
        return mScreenState == Display.STATE_ON;
    }

    void initTimes(long uptime, long realtime) {
        mStartClockTime = System.currentTimeMillis();
        mOnBatteryTimeBase.init(uptime, realtime);
        mOnBatteryScreenOffTimeBase.init(uptime, realtime);
        mRealtime = 0;
        mUptime = 0;
        mRealtimeStart = realtime;
        mUptimeStart = uptime;
    }

    void initDischarge() {
        mLowDischargeAmountSinceCharge = 0;
        mHighDischargeAmountSinceCharge = 0;
        mDischargeAmountScreenOn = 0;
        mDischargeAmountScreenOnSinceCharge = 0;
        mDischargeAmountScreenOff = 0;
        mDischargeAmountScreenOffSinceCharge = 0;
        mDischargeStepTracker.init();
        mChargeStepTracker.init();
    }

    public void resetAllStatsCmdLocked() {
        resetAllStatsLocked();
        final long mSecUptime = SystemClock.uptimeMillis();
        long uptime = mSecUptime * 1000;
        long mSecRealtime = SystemClock.elapsedRealtime();
        long realtime = mSecRealtime * 1000;
        mDischargeStartLevel = mHistoryCur.batteryLevel;
        pullPendingStateUpdatesLocked();
        addHistoryRecordLocked(mSecRealtime, mSecUptime);
        mDischargeCurrentLevel = mDischargeUnplugLevel = mDischargePlugLevel
                = mCurrentBatteryLevel = mHistoryCur.batteryLevel;
        mOnBatteryTimeBase.reset(uptime, realtime);
        mOnBatteryScreenOffTimeBase.reset(uptime, realtime);
        if ((mHistoryCur.states&HistoryItem.STATE_BATTERY_PLUGGED_FLAG) == 0) {
            if (mScreenState == Display.STATE_ON) {
                mDischargeScreenOnUnplugLevel = mHistoryCur.batteryLevel;
                mDischargeScreenOffUnplugLevel = 0;
            } else {
                mDischargeScreenOnUnplugLevel = 0;
                mDischargeScreenOffUnplugLevel = mHistoryCur.batteryLevel;
            }
            mDischargeAmountScreenOn = 0;
            mDischargeAmountScreenOff = 0;
        }
        initActiveHistoryEventsLocked(mSecRealtime, mSecUptime);
    }

    private void resetAllStatsLocked() {
        mStartCount = 0;
        initTimes(SystemClock.uptimeMillis() * 1000, SystemClock.elapsedRealtime() * 1000);
        mScreenOnTimer.reset(false);
        for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
            mScreenBrightnessTimer[i].reset(false);
        }
        mInteractiveTimer.reset(false);
        mPowerSaveModeEnabledTimer.reset(false);
        mLongestLightIdleTime = 0;
        mLongestFullIdleTime = 0;
        mDeviceIdleModeLightTimer.reset(false);
        mDeviceIdleModeFullTimer.reset(false);
        mDeviceLightIdlingTimer.reset(false);
        mDeviceIdlingTimer.reset(false);
        mPhoneOnTimer.reset(false);
        mAudioOnTimer.reset(false);
        mVideoOnTimer.reset(false);
        mFlashlightOnTimer.reset(false);
        mCameraOnTimer.reset(false);
        mBluetoothScanTimer.reset(false);
        for (int i=0; i<SignalStrength.NUM_SIGNAL_STRENGTH_BINS; i++) {
            mPhoneSignalStrengthsTimer[i].reset(false);
        }
        mPhoneSignalScanningTimer.reset(false);
        for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
            mPhoneDataConnectionsTimer[i].reset(false);
        }
        for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
            mNetworkByteActivityCounters[i].reset(false);
            mNetworkPacketActivityCounters[i].reset(false);
        }
        mMobileRadioActiveTimer.reset(false);
        mMobileRadioActivePerAppTimer.reset(false);
        mMobileRadioActiveAdjustedTime.reset(false);
        mMobileRadioActiveUnknownTime.reset(false);
        mMobileRadioActiveUnknownCount.reset(false);
        mWifiOnTimer.reset(false);
        mGlobalWifiRunningTimer.reset(false);
        for (int i=0; i<NUM_WIFI_STATES; i++) {
            mWifiStateTimer[i].reset(false);
        }
        for (int i=0; i<NUM_WIFI_SUPPL_STATES; i++) {
            mWifiSupplStateTimer[i].reset(false);
        }
        for (int i=0; i<NUM_WIFI_SIGNAL_STRENGTH_BINS; i++) {
            mWifiSignalStrengthsTimer[i].reset(false);
        }
        mWifiActivity.reset(false);
        mBluetoothActivity.reset(false);
        mModemActivity.reset(false);
        mNumConnectivityChange = mLoadedNumConnectivityChange = mUnpluggedNumConnectivityChange = 0;

        for (int i=0; i<mUidStats.size(); i++) {
            if (mUidStats.valueAt(i).reset()) {
                mUidStats.remove(mUidStats.keyAt(i));
                i--;
            }
        }

        if (mKernelWakelockStats.size() > 0) {
            for (SamplingTimer timer : mKernelWakelockStats.values()) {
                mOnBatteryScreenOffTimeBase.remove(timer);
            }
            mKernelWakelockStats.clear();
        }

        if (mWakeupReasonStats.size() > 0) {
            for (SamplingTimer timer : mWakeupReasonStats.values()) {
                mOnBatteryTimeBase.remove(timer);
            }
            mWakeupReasonStats.clear();
        }

        mLastHistoryStepDetails = null;
        mLastStepCpuUserTime = mLastStepCpuSystemTime = 0;
        mCurStepCpuUserTime = mCurStepCpuSystemTime = 0;
        mLastStepCpuUserTime = mCurStepCpuUserTime = 0;
        mLastStepCpuSystemTime = mCurStepCpuSystemTime = 0;
        mLastStepStatUserTime = mCurStepStatUserTime = 0;
        mLastStepStatSystemTime = mCurStepStatSystemTime = 0;
        mLastStepStatIOWaitTime = mCurStepStatIOWaitTime = 0;
        mLastStepStatIrqTime = mCurStepStatIrqTime = 0;
        mLastStepStatSoftIrqTime = mCurStepStatSoftIrqTime = 0;
        mLastStepStatIdleTime = mCurStepStatIdleTime = 0;

        initDischarge();

        clearHistoryLocked();
    }

    private void initActiveHistoryEventsLocked(long elapsedRealtimeMs, long uptimeMs) {
        for (int i=0; i<HistoryItem.EVENT_COUNT; i++) {
            if (!mRecordAllHistory && i == HistoryItem.EVENT_PROC) {
                // Not recording process starts/stops.
                continue;
            }
            HashMap<String, SparseIntArray> active = mActiveEvents.getStateForEvent(i);
            if (active == null) {
                continue;
            }
            for (HashMap.Entry<String, SparseIntArray> ent : active.entrySet()) {
                SparseIntArray uids = ent.getValue();
                for (int j=0; j<uids.size(); j++) {
                    addHistoryEventLocked(elapsedRealtimeMs, uptimeMs, i, ent.getKey(),
                            uids.keyAt(j));
                }
            }
        }
    }

    void updateDischargeScreenLevelsLocked(boolean oldScreenOn, boolean newScreenOn) {
        if (oldScreenOn) {
            int diff = mDischargeScreenOnUnplugLevel - mDischargeCurrentLevel;
            if (diff > 0) {
                mDischargeAmountScreenOn += diff;
                mDischargeAmountScreenOnSinceCharge += diff;
            }
        } else {
            int diff = mDischargeScreenOffUnplugLevel - mDischargeCurrentLevel;
            if (diff > 0) {
                mDischargeAmountScreenOff += diff;
                mDischargeAmountScreenOffSinceCharge += diff;
            }
        }
        if (newScreenOn) {
            mDischargeScreenOnUnplugLevel = mDischargeCurrentLevel;
            mDischargeScreenOffUnplugLevel = 0;
        } else {
            mDischargeScreenOnUnplugLevel = 0;
            mDischargeScreenOffUnplugLevel = mDischargeCurrentLevel;
        }
    }

    public void pullPendingStateUpdatesLocked() {
        if (mOnBatteryInternal) {
            final boolean screenOn = mScreenState == Display.STATE_ON;
            updateDischargeScreenLevelsLocked(screenOn, screenOn);
        }
    }

    private String[] mMobileIfaces = EmptyArray.STRING;
    private String[] mWifiIfaces = EmptyArray.STRING;

    private final NetworkStatsFactory mNetworkStatsFactory = new NetworkStatsFactory();

    private static final int NETWORK_STATS_LAST = 0;
    private static final int NETWORK_STATS_NEXT = 1;
    private static final int NETWORK_STATS_DELTA = 2;

    private final NetworkStats[] mMobileNetworkStats = new NetworkStats[] {
            new NetworkStats(SystemClock.elapsedRealtime(), 50),
            new NetworkStats(SystemClock.elapsedRealtime(), 50),
            new NetworkStats(SystemClock.elapsedRealtime(), 50)
    };

    private final NetworkStats[] mWifiNetworkStats = new NetworkStats[] {
            new NetworkStats(SystemClock.elapsedRealtime(), 50),
            new NetworkStats(SystemClock.elapsedRealtime(), 50),
            new NetworkStats(SystemClock.elapsedRealtime(), 50)
    };

    /**
     * Retrieves the delta of network stats for the given network ifaces. Uses networkStatsBuffer
     * as a buffer of NetworkStats objects to cycle through when computing deltas.
     */
    private NetworkStats getNetworkStatsDeltaLocked(String[] ifaces,
                                                    NetworkStats[] networkStatsBuffer)
            throws IOException {
        if (!SystemProperties.getBoolean(NetworkManagementSocketTagger.PROP_QTAGUID_ENABLED,
                false)) {
            return null;
        }

        final NetworkStats stats = mNetworkStatsFactory.readNetworkStatsDetail(NetworkStats.UID_ALL,
                ifaces, NetworkStats.TAG_NONE, networkStatsBuffer[NETWORK_STATS_NEXT]);
        networkStatsBuffer[NETWORK_STATS_DELTA] = NetworkStats.subtract(stats,
                networkStatsBuffer[NETWORK_STATS_LAST], null, null,
                networkStatsBuffer[NETWORK_STATS_DELTA]);
        networkStatsBuffer[NETWORK_STATS_NEXT] = networkStatsBuffer[NETWORK_STATS_LAST];
        networkStatsBuffer[NETWORK_STATS_LAST] = stats;
        return networkStatsBuffer[NETWORK_STATS_DELTA];
    }

    /**
     * Distribute WiFi energy info and network traffic to apps.
     * @param info The energy information from the WiFi controller.
     */
    public void updateWifiStateLocked(@Nullable final WifiActivityEnergyInfo info) {
        if (DEBUG_ENERGY) {
            Slog.d(TAG, "Updating wifi stats");
        }

        final long elapsedRealtimeMs = SystemClock.elapsedRealtime();
        NetworkStats delta = null;
        try {
            if (!ArrayUtils.isEmpty(mWifiIfaces)) {
                delta = getNetworkStatsDeltaLocked(mWifiIfaces, mWifiNetworkStats);
            }
        } catch (IOException e) {
            Slog.wtf(TAG, "Failed to get wifi network stats", e);
            return;
        }

        if (!mOnBatteryInternal) {
            return;
        }

        SparseLongArray rxPackets = new SparseLongArray();
        SparseLongArray txPackets = new SparseLongArray();
        long totalTxPackets = 0;
        long totalRxPackets = 0;
        if (delta != null) {
            final int size = delta.size();
            for (int i = 0; i < size; i++) {
                final NetworkStats.Entry entry = delta.getValues(i, mTmpNetworkStatsEntry);

                if (DEBUG_ENERGY) {
                    Slog.d(TAG, "Wifi uid " + entry.uid + ": delta rx=" + entry.rxBytes
                            + " tx=" + entry.txBytes + " rxPackets=" + entry.rxPackets
                            + " txPackets=" + entry.txPackets);
                }

                if (entry.rxBytes == 0 && entry.txBytes == 0) {
                    // Skip the lookup below since there is no work to do.
                    continue;
                }

                final Uid u = getUidStatsLocked(mapUid(entry.uid));
                if (entry.rxBytes != 0) {
                    u.noteNetworkActivityLocked(NETWORK_WIFI_RX_DATA, entry.rxBytes,
                            entry.rxPackets);
                    mNetworkByteActivityCounters[NETWORK_WIFI_RX_DATA].addCountLocked(
                            entry.rxBytes);
                    mNetworkPacketActivityCounters[NETWORK_WIFI_RX_DATA].addCountLocked(
                            entry.rxPackets);

                    rxPackets.put(u.getUid(), entry.rxPackets);

                    // Sum the total number of packets so that the Rx Power can
                    // be evenly distributed amongst the apps.
                    totalRxPackets += entry.rxPackets;
                }

                if (entry.txBytes != 0) {
                    u.noteNetworkActivityLocked(NETWORK_WIFI_TX_DATA, entry.txBytes,
                            entry.txPackets);
                    mNetworkByteActivityCounters[NETWORK_WIFI_TX_DATA].addCountLocked(
                            entry.txBytes);
                    mNetworkPacketActivityCounters[NETWORK_WIFI_TX_DATA].addCountLocked(
                            entry.txPackets);

                    txPackets.put(u.getUid(), entry.txPackets);

                    // Sum the total number of packets so that the Tx Power can
                    // be evenly distributed amongst the apps.
                    totalTxPackets += entry.txPackets;
                }
            }
        }

        if (info != null) {
            mHasWifiReporting = true;

            // Measured in mAms
            final long txTimeMs = info.getControllerTxTimeMillis();
            final long rxTimeMs = info.getControllerRxTimeMillis();
            final long idleTimeMs = info.getControllerIdleTimeMillis();
            final long totalTimeMs = txTimeMs + rxTimeMs + idleTimeMs;

            long leftOverRxTimeMs = rxTimeMs;
            long leftOverTxTimeMs = txTimeMs;

            if (DEBUG_ENERGY) {
                Slog.d(TAG, "------ BEGIN WiFi power blaming ------");
                Slog.d(TAG, "  Tx Time:    " + txTimeMs + " ms");
                Slog.d(TAG, "  Rx Time:    " + rxTimeMs + " ms");
                Slog.d(TAG, "  Idle Time:  " + idleTimeMs + " ms");
                Slog.d(TAG, "  Total Time: " + totalTimeMs + " ms");
            }

            long totalWifiLockTimeMs = 0;
            long totalScanTimeMs = 0;

            // On the first pass, collect some totals so that we can normalize power
            // calculations if we need to.
            final int uidStatsSize = mUidStats.size();
            for (int i = 0; i < uidStatsSize; i++) {
                final Uid uid = mUidStats.valueAt(i);

                // Sum the total scan power for all apps.
                totalScanTimeMs += uid.mWifiScanTimer.getTimeSinceMarkLocked(
                        elapsedRealtimeMs * 1000) / 1000;

                // Sum the total time holding wifi lock for all apps.
                totalWifiLockTimeMs += uid.mFullWifiLockTimer.getTimeSinceMarkLocked(
                        elapsedRealtimeMs * 1000) / 1000;
            }

            if (DEBUG_ENERGY && totalScanTimeMs > rxTimeMs) {
                Slog.d(TAG, "  !Estimated scan time > Actual rx time (" + totalScanTimeMs + " ms > "
                        + rxTimeMs + " ms). Normalizing scan time.");
            }
            if (DEBUG_ENERGY && totalScanTimeMs > txTimeMs) {
                Slog.d(TAG, "  !Estimated scan time > Actual tx time (" + totalScanTimeMs + " ms > "
                        + txTimeMs + " ms). Normalizing scan time.");
            }

            // Actually assign and distribute power usage to apps.
            for (int i = 0; i < uidStatsSize; i++) {
                final Uid uid = mUidStats.valueAt(i);

                long scanTimeSinceMarkMs = uid.mWifiScanTimer.getTimeSinceMarkLocked(
                        elapsedRealtimeMs * 1000) / 1000;
                if (scanTimeSinceMarkMs > 0) {
                    // Set the new mark so that next time we get new data since this point.
                    uid.mWifiScanTimer.setMark(elapsedRealtimeMs);

                    long scanRxTimeSinceMarkMs = scanTimeSinceMarkMs;
                    long scanTxTimeSinceMarkMs = scanTimeSinceMarkMs;

                    // Our total scan time is more than the reported Tx/Rx time.
                    // This is possible because the cost of a scan is approximate.
                    // Let's normalize the result so that we evenly blame each app
                    // scanning.
                    //
                    // This means that we may have apps that transmitted/received packets not be
                    // blamed for this, but this is fine as scans are relatively more expensive.
                    if (totalScanTimeMs > rxTimeMs) {
                        scanRxTimeSinceMarkMs = (rxTimeMs * scanRxTimeSinceMarkMs) /
                                totalScanTimeMs;
                    }
                    if (totalScanTimeMs > txTimeMs) {
                        scanTxTimeSinceMarkMs = (txTimeMs * scanTxTimeSinceMarkMs) /
                                totalScanTimeMs;
                    }

                    if (DEBUG_ENERGY) {
                        Slog.d(TAG, "  ScanTime for UID " + uid.getUid() + ": Rx:"
                                + scanRxTimeSinceMarkMs + " ms  Tx:"
                                + scanTxTimeSinceMarkMs + " ms)");
                    }

                    ControllerActivityCounterImpl activityCounter =
                            uid.getOrCreateWifiControllerActivityLocked();
                    activityCounter.getRxTimeCounter().addCountLocked(scanRxTimeSinceMarkMs);
                    activityCounter.getTxTimeCounters()[0].addCountLocked(scanTxTimeSinceMarkMs);
                    leftOverRxTimeMs -= scanRxTimeSinceMarkMs;
                    leftOverTxTimeMs -= scanTxTimeSinceMarkMs;
                }

                // Distribute evenly the power consumed while Idle to each app holding a WiFi
                // lock.
                final long wifiLockTimeSinceMarkMs = uid.mFullWifiLockTimer.getTimeSinceMarkLocked(
                        elapsedRealtimeMs * 1000) / 1000;
                if (wifiLockTimeSinceMarkMs > 0) {
                    // Set the new mark so that next time we get new data since this point.
                    uid.mFullWifiLockTimer.setMark(elapsedRealtimeMs);

                    final long myIdleTimeMs = (wifiLockTimeSinceMarkMs * idleTimeMs)
                            / totalWifiLockTimeMs;
                    if (DEBUG_ENERGY) {
                        Slog.d(TAG, "  IdleTime for UID " + uid.getUid() + ": "
                                + myIdleTimeMs + " ms");
                    }
                    uid.getOrCreateWifiControllerActivityLocked().getIdleTimeCounter()
                            .addCountLocked(myIdleTimeMs);
                }
            }

            if (DEBUG_ENERGY) {
                Slog.d(TAG, "  New RxPower: " + leftOverRxTimeMs + " ms");
                Slog.d(TAG, "  New TxPower: " + leftOverTxTimeMs + " ms");
            }

            // Distribute the remaining Tx power appropriately between all apps that transmitted
            // packets.
            for (int i = 0; i < txPackets.size(); i++) {
                final Uid uid = getUidStatsLocked(txPackets.keyAt(i));
                final long myTxTimeMs = (txPackets.valueAt(i) * leftOverTxTimeMs) / totalTxPackets;
                if (DEBUG_ENERGY) {
                    Slog.d(TAG, "  TxTime for UID " + uid.getUid() + ": " + myTxTimeMs + " ms");
                }
                uid.getOrCreateWifiControllerActivityLocked().getTxTimeCounters()[0]
                        .addCountLocked(myTxTimeMs);
            }

            // Distribute the remaining Rx power appropriately between all apps that received
            // packets.
            for (int i = 0; i < rxPackets.size(); i++) {
                final Uid uid = getUidStatsLocked(rxPackets.keyAt(i));
                final long myRxTimeMs = (rxPackets.valueAt(i) * leftOverRxTimeMs) / totalRxPackets;
                if (DEBUG_ENERGY) {
                    Slog.d(TAG, "  RxTime for UID " + uid.getUid() + ": " + myRxTimeMs + " ms");
                }
                uid.getOrCreateWifiControllerActivityLocked().getRxTimeCounter()
                        .addCountLocked(myRxTimeMs);
            }

            // Any left over power use will be picked up by the WiFi category in BatteryStatsHelper.

            // Update WiFi controller stats.
            mWifiActivity.getRxTimeCounter().addCountLocked(info.getControllerRxTimeMillis());
            mWifiActivity.getTxTimeCounters()[0].addCountLocked(info.getControllerTxTimeMillis());
            mWifiActivity.getIdleTimeCounter().addCountLocked(info.getControllerIdleTimeMillis());

            // POWER_WIFI_CONTROLLER_OPERATING_VOLTAGE is measured in mV, so convert to V.
            final double opVolt = mPowerProfile.getAveragePower(
                    PowerProfile.POWER_WIFI_CONTROLLER_OPERATING_VOLTAGE) / 1000.0;
            if (opVolt != 0) {
                // We store the power drain as mAms.
                mWifiActivity.getPowerCounter().addCountLocked(
                        (long)(info.getControllerEnergyUsed() / opVolt));
            }
        }
    }

    /**
     * Distribute Cell radio energy info and network traffic to apps.
     */
    public void updateMobileRadioStateLocked(final long elapsedRealtimeMs,
                                             final ModemActivityInfo activityInfo) {
        if (DEBUG_ENERGY) {
            Slog.d(TAG, "Updating mobile radio stats with " + activityInfo);
        }

        NetworkStats delta = null;
        try {
            if (!ArrayUtils.isEmpty(mMobileIfaces)) {
                delta = getNetworkStatsDeltaLocked(mMobileIfaces, mMobileNetworkStats);
            }
        } catch (IOException e) {
            Slog.wtf(TAG, "Failed to get mobile network stats", e);
            return;
        }

        if (!mOnBatteryInternal) {
            return;
        }

        long radioTime = mMobileRadioActivePerAppTimer.getTimeSinceMarkLocked(
                elapsedRealtimeMs * 1000);
        mMobileRadioActivePerAppTimer.setMark(elapsedRealtimeMs);

        long totalRxPackets = 0;
        long totalTxPackets = 0;
        if (delta != null) {
            final int size = delta.size();
            for (int i = 0; i < size; i++) {
                final NetworkStats.Entry entry = delta.getValues(i, mTmpNetworkStatsEntry);
                if (entry.rxPackets == 0 && entry.txPackets == 0) {
                    continue;
                }

                if (DEBUG_ENERGY) {
                    Slog.d(TAG, "Mobile uid " + entry.uid + ": delta rx=" + entry.rxBytes
                            + " tx=" + entry.txBytes + " rxPackets=" + entry.rxPackets
                            + " txPackets=" + entry.txPackets);
                }

                totalRxPackets += entry.rxPackets;
                totalTxPackets += entry.txPackets;

                final Uid u = getUidStatsLocked(mapUid(entry.uid));
                u.noteNetworkActivityLocked(NETWORK_MOBILE_RX_DATA, entry.rxBytes, entry.rxPackets);
                u.noteNetworkActivityLocked(NETWORK_MOBILE_TX_DATA, entry.txBytes, entry.txPackets);

                mNetworkByteActivityCounters[NETWORK_MOBILE_RX_DATA].addCountLocked(
                        entry.rxBytes);
                mNetworkByteActivityCounters[NETWORK_MOBILE_TX_DATA].addCountLocked(
                        entry.txBytes);
                mNetworkPacketActivityCounters[NETWORK_MOBILE_RX_DATA].addCountLocked(
                        entry.rxPackets);
                mNetworkPacketActivityCounters[NETWORK_MOBILE_TX_DATA].addCountLocked(
                        entry.txPackets);
            }

            // Now distribute proportional blame to the apps that did networking.
            long totalPackets = totalRxPackets + totalTxPackets;
            if (totalPackets > 0) {
                for (int i = 0; i < size; i++) {
                    final NetworkStats.Entry entry = delta.getValues(i, mTmpNetworkStatsEntry);
                    if (entry.rxPackets == 0 && entry.txPackets == 0) {
                        continue;
                    }

                    final Uid u = getUidStatsLocked(mapUid(entry.uid));

                    // Distribute total radio active time in to this app.
                    final long appPackets = entry.rxPackets + entry.txPackets;
                    final long appRadioTime = (radioTime * appPackets) / totalPackets;
                    u.noteMobileRadioActiveTimeLocked(appRadioTime);

                    // Remove this app from the totals, so that we don't lose any time
                    // due to rounding.
                    radioTime -= appRadioTime;
                    totalPackets -= appPackets;

                    if (activityInfo != null) {
                        ControllerActivityCounterImpl activityCounter =
                                u.getOrCreateModemControllerActivityLocked();
                        if (totalRxPackets > 0 && entry.rxPackets > 0) {
                            final long rxMs = (entry.rxPackets * activityInfo.getRxTimeMillis())
                                    / totalRxPackets;
                            activityCounter.getRxTimeCounter().addCountLocked(rxMs);
                        }

                        if (totalTxPackets > 0 && entry.txPackets > 0) {
                            for (int lvl = 0; lvl < ModemActivityInfo.TX_POWER_LEVELS; lvl++) {
                                long txMs = entry.txPackets * activityInfo.getTxTimeMillis()[lvl];
                                txMs /= totalTxPackets;
                                activityCounter.getTxTimeCounters()[lvl].addCountLocked(txMs);
                            }
                        }
                    }
                }
            }

            if (radioTime > 0) {
                // Whoops, there is some radio time we can't blame on an app!
                mMobileRadioActiveUnknownTime.addCountLocked(radioTime);
                mMobileRadioActiveUnknownCount.addCountLocked(1);
            }
        }

        if (activityInfo != null) {
            mHasModemReporting = true;
            mModemActivity.getIdleTimeCounter().addCountLocked(activityInfo.getIdleTimeMillis());
            mModemActivity.getRxTimeCounter().addCountLocked(activityInfo.getRxTimeMillis());
            for (int lvl = 0; lvl < ModemActivityInfo.TX_POWER_LEVELS; lvl++) {
                mModemActivity.getTxTimeCounters()[lvl]
                        .addCountLocked(activityInfo.getTxTimeMillis()[lvl]);
            }

            // POWER_MODEM_CONTROLLER_OPERATING_VOLTAGE is measured in mV, so convert to V.
            final double opVolt = mPowerProfile.getAveragePower(
                    PowerProfile.POWER_MODEM_CONTROLLER_OPERATING_VOLTAGE) / 1000.0;
            if (opVolt != 0) {
                // We store the power drain as mAms.
                mModemActivity.getPowerCounter().addCountLocked(
                        (long) (activityInfo.getEnergyUsed() / opVolt));
            }
        }
    }

    /**
     * Distribute Bluetooth energy info and network traffic to apps.
     * @param info The energy information from the bluetooth controller.
     */
    public void updateBluetoothStateLocked(@Nullable final BluetoothActivityEnergyInfo info) {
        if (DEBUG_ENERGY) {
            Slog.d(TAG, "Updating bluetooth stats: " + info);
        }

        if (info == null || !mOnBatteryInternal) {
            return;
        }

        mHasBluetoothReporting = true;

        final long elapsedRealtimeMs = SystemClock.elapsedRealtime();
        final long rxTimeMs = info.getControllerRxTimeMillis();
        final long txTimeMs = info.getControllerTxTimeMillis();

        if (DEBUG_ENERGY) {
            Slog.d(TAG, "------ BEGIN BLE power blaming ------");
            Slog.d(TAG, "  Tx Time:    " + txTimeMs + " ms");
            Slog.d(TAG, "  Rx Time:    " + rxTimeMs + " ms");
            Slog.d(TAG, "  Idle Time:  " + info.getControllerIdleTimeMillis() + " ms");
        }

        long totalScanTimeMs = 0;

        final int uidCount = mUidStats.size();
        for (int i = 0; i < uidCount; i++) {
            final Uid u = mUidStats.valueAt(i);
            if (u.mBluetoothScanTimer == null) {
                continue;
            }

            totalScanTimeMs += u.mBluetoothScanTimer.getTimeSinceMarkLocked(
                    elapsedRealtimeMs * 1000) / 1000;
        }

        final boolean normalizeScanRxTime = (totalScanTimeMs > rxTimeMs);
        final boolean normalizeScanTxTime = (totalScanTimeMs > txTimeMs);

        if (DEBUG_ENERGY) {
            Slog.d(TAG, "Normalizing scan power for RX=" + normalizeScanRxTime
                    + " TX=" + normalizeScanTxTime);
        }

        long leftOverRxTimeMs = rxTimeMs;
        long leftOverTxTimeMs = txTimeMs;

        for (int i = 0; i < uidCount; i++) {
            final Uid u = mUidStats.valueAt(i);
            if (u.mBluetoothScanTimer == null) {
                continue;
            }

            long scanTimeSinceMarkMs = u.mBluetoothScanTimer.getTimeSinceMarkLocked(
                    elapsedRealtimeMs * 1000) / 1000;
            if (scanTimeSinceMarkMs > 0) {
                // Set the new mark so that next time we get new data since this point.
                u.mBluetoothScanTimer.setMark(elapsedRealtimeMs);

                long scanTimeRxSinceMarkMs = scanTimeSinceMarkMs;
                long scanTimeTxSinceMarkMs = scanTimeSinceMarkMs;

                if (normalizeScanRxTime) {
                    // Scan time is longer than the total rx time in the controller,
                    // so distribute the scan time proportionately. This means regular traffic
                    // will not blamed, but scans are more expensive anyways.
                    scanTimeRxSinceMarkMs = (rxTimeMs * scanTimeRxSinceMarkMs) / totalScanTimeMs;
                }

                if (normalizeScanTxTime) {
                    // Scan time is longer than the total tx time in the controller,
                    // so distribute the scan time proportionately. This means regular traffic
                    // will not blamed, but scans are more expensive anyways.
                    scanTimeTxSinceMarkMs = (txTimeMs * scanTimeTxSinceMarkMs) / totalScanTimeMs;
                }

                final ControllerActivityCounterImpl counter =
                        u.getOrCreateBluetoothControllerActivityLocked();
                counter.getRxTimeCounter().addCountLocked(scanTimeRxSinceMarkMs);
                counter.getTxTimeCounters()[0].addCountLocked(scanTimeTxSinceMarkMs);

                leftOverRxTimeMs -= scanTimeRxSinceMarkMs;
                leftOverTxTimeMs -= scanTimeTxSinceMarkMs;
            }
        }

        if (DEBUG_ENERGY) {
            Slog.d(TAG, "Left over time for traffic RX=" + leftOverRxTimeMs
                    + " TX=" + leftOverTxTimeMs);
        }

        //
        // Now distribute blame to apps that did bluetooth traffic.
        //

        long totalTxBytes = 0;
        long totalRxBytes = 0;

        final UidTraffic[] uidTraffic = info.getUidTraffic();
        final int numUids = uidTraffic != null ? uidTraffic.length : 0;
        for (int i = 0; i < numUids; i++) {
            final UidTraffic traffic = uidTraffic[i];

            // Add to the global counters.
            mNetworkByteActivityCounters[NETWORK_BT_RX_DATA].addCountLocked(
                    traffic.getRxBytes());
            mNetworkByteActivityCounters[NETWORK_BT_TX_DATA].addCountLocked(
                    traffic.getTxBytes());

            // Add to the UID counters.
            final Uid u = getUidStatsLocked(mapUid(traffic.getUid()));
            u.noteNetworkActivityLocked(NETWORK_BT_RX_DATA, traffic.getRxBytes(), 0);
            u.noteNetworkActivityLocked(NETWORK_BT_TX_DATA, traffic.getTxBytes(), 0);

            // Calculate the total traffic.
            totalTxBytes += traffic.getTxBytes();
            totalRxBytes += traffic.getRxBytes();
        }

        if ((totalTxBytes != 0 || totalRxBytes != 0) &&
                (leftOverRxTimeMs != 0 || leftOverTxTimeMs != 0)) {
            for (int i = 0; i < numUids; i++) {
                final UidTraffic traffic = uidTraffic[i];

                final Uid u = getUidStatsLocked(mapUid(traffic.getUid()));
                final ControllerActivityCounterImpl counter =
                        u.getOrCreateBluetoothControllerActivityLocked();

                if (totalRxBytes > 0 && traffic.getRxBytes() > 0) {
                    final long timeRxMs = (leftOverRxTimeMs * traffic.getRxBytes()) / totalRxBytes;

                    if (DEBUG_ENERGY) {
                        Slog.d(TAG, "UID=" + traffic.getUid() + " rx_bytes=" + traffic.getRxBytes()
                                + " rx_time=" + timeRxMs);
                    }
                    counter.getRxTimeCounter().addCountLocked(timeRxMs);
                    leftOverRxTimeMs -= timeRxMs;
                }

                if (totalTxBytes > 0 && traffic.getTxBytes() > 0) {
                    final long timeTxMs = (leftOverTxTimeMs * traffic.getTxBytes()) / totalTxBytes;

                    if (DEBUG_ENERGY) {
                        Slog.d(TAG, "UID=" + traffic.getUid() + " tx_bytes=" + traffic.getTxBytes()
                                + " tx_time=" + timeTxMs);
                    }

                    counter.getTxTimeCounters()[0].addCountLocked(timeTxMs);
                    leftOverTxTimeMs -= timeTxMs;
                }
            }
        }

        mBluetoothActivity.getRxTimeCounter().addCountLocked(
                info.getControllerRxTimeMillis());
        mBluetoothActivity.getTxTimeCounters()[0].addCountLocked(
                info.getControllerTxTimeMillis());
        mBluetoothActivity.getIdleTimeCounter().addCountLocked(
                info.getControllerIdleTimeMillis());

        // POWER_BLUETOOTH_CONTROLLER_OPERATING_VOLTAGE is measured in mV, so convert to V.
        final double opVolt = mPowerProfile.getAveragePower(
                PowerProfile.POWER_BLUETOOTH_CONTROLLER_OPERATING_VOLTAGE) / 1000.0;
        if (opVolt != 0) {
            // We store the power drain as mAms.
            mBluetoothActivity.getPowerCounter().addCountLocked(
                    (long) (info.getControllerEnergyUsed() / opVolt));
        }
    }

    /**
     * Read and distribute kernel wake lock use across apps.
     */
    public void updateKernelWakelocksLocked() {
        final KernelWakelockStats wakelockStats = mKernelWakelockReader.readKernelWakelockStats(
                mTmpWakelockStats);
        if (wakelockStats == null) {
            // Not crashing might make board bringup easier.
            Slog.w(TAG, "Couldn't get kernel wake lock stats");
            return;
        }

        // Record whether we've seen a non-zero time (for debugging b/22716723).
        boolean seenNonZeroTime = false;
        for (Map.Entry<String, KernelWakelockStats.Entry> ent : wakelockStats.entrySet()) {
            String name = ent.getKey();
            KernelWakelockStats.Entry kws = ent.getValue();

            SamplingTimer kwlt = mKernelWakelockStats.get(name);
            if (kwlt == null) {
                kwlt = new SamplingTimer(mOnBatteryScreenOffTimeBase,
                        true /* track reported val */);
                mKernelWakelockStats.put(name, kwlt);
            }
            kwlt.updateCurrentReportedCount(kws.mCount);
            kwlt.updateCurrentReportedTotalTime(kws.mTotalTime);
            kwlt.setUpdateVersion(kws.mVersion);

            if (kws.mVersion != wakelockStats.kernelWakelockVersion)
            seenNonZeroTime |= kws.mTotalTime > 0;
        }

        int numWakelocksSetStale = 0;
        if (wakelockStats.size() != mKernelWakelockStats.size()) {
            // Set timers to stale if they didn't appear in /proc/wakelocks this time.
            for (Map.Entry<String, SamplingTimer> ent : mKernelWakelockStats.entrySet()) {
                SamplingTimer st = ent.getValue();
                if (st.getUpdateVersion() != wakelockStats.kernelWakelockVersion) {
                    st.setStale();
                    numWakelocksSetStale++;
                }
            }
        }

        if (!seenNonZeroTime) {
            Slog.wtf(TAG, "All kernel wakelocks had time of zero");
        }

        if (numWakelocksSetStale == mKernelWakelockStats.size()) {
            Slog.wtf(TAG, "All kernel wakelocks were set stale. new version=" +
                    wakelockStats.kernelWakelockVersion);
        }
    }

    // We use an anonymous class to access these variables,
    // so they can't live on the stack or they'd have to be
    // final MutableLong objects (more allocations).
    // Used in updateCpuTimeLocked().
    long mTempTotalCpuUserTimeUs;
    long mTempTotalCpuSystemTimeUs;

    /**
     * Read and distribute CPU usage across apps. If their are partial wakelocks being held
     * and we are on battery with screen off, we give more of the cpu time to those apps holding
     * wakelocks. If the screen is on, we just assign the actual cpu time an app used.
     */
    public void updateCpuTimeLocked() {
        if (mPowerProfile == null) {
            return;
        }

        if (DEBUG_ENERGY_CPU) {
            Slog.d(TAG, "!Cpu updating!");
        }

        // Holding a wakelock costs more than just using the cpu.
        // Currently, we assign only half the cpu time to an app that is running but
        // not holding a wakelock. The apps holding wakelocks get the rest of the blame.
        // If no app is holding a wakelock, then the distribution is normal.
        final int wakelockWeight = 50;

        // Read the time spent for each cluster at various cpu frequencies.
        final long[][] clusterSpeeds = new long[mKernelCpuSpeedReaders.length][];
        for (int cluster = 0; cluster < mKernelCpuSpeedReaders.length; cluster++) {
            clusterSpeeds[cluster] = mKernelCpuSpeedReaders[cluster].readDelta();
        }

        int numWakelocks = 0;

        // Calculate how many wakelocks we have to distribute amongst. The system is excluded.
        // Only distribute cpu power to wakelocks if the screen is off and we're on battery.
        final int numPartialTimers = mPartialTimers.size();
        if (mOnBatteryScreenOffTimeBase.isRunning()) {
            for (int i = 0; i < numPartialTimers; i++) {
                final StopwatchTimer timer = mPartialTimers.get(i);
                if (timer.mInList && timer.mUid != null && timer.mUid.mUid != Process.SYSTEM_UID) {
                    // Since the collection and blaming of wakelocks can be scheduled to run after
                    // some delay, the mPartialTimers list may have new entries. We can't blame
                    // the newly added timer for past cpu time, so we only consider timers that
                    // were present for one round of collection. Once a timer has gone through
                    // a round of collection, its mInList field is set to true.
                    numWakelocks++;
                }
            }
        }

        final int numWakelocksF = numWakelocks;
        mTempTotalCpuUserTimeUs = 0;
        mTempTotalCpuSystemTimeUs = 0;

        // Read the CPU data for each UID. This will internally generate a snapshot so next time
        // we read, we get a delta. If we are to distribute the cpu time, then do so. Otherwise
        // we just ignore the data.
        final long startTimeMs = SystemClock.elapsedRealtime();
        mKernelUidCpuTimeReader.readDelta(!mOnBatteryInternal ? null :
                new KernelUidCpuTimeReader.Callback() {
                    @Override
                    public void onUidCpuTime(int uid, long userTimeUs, long systemTimeUs,
                                             long powerMaUs) {
                        final Uid u = getUidStatsLocked(mapUid(uid));

                        // Accumulate the total system and user time.
                        mTempTotalCpuUserTimeUs += userTimeUs;
                        mTempTotalCpuSystemTimeUs += systemTimeUs;

                        StringBuilder sb = null;
                        if (DEBUG_ENERGY_CPU) {
                            sb = new StringBuilder();
                            sb.append("  got time for uid=").append(u.mUid).append(": u=");
                            TimeUtils.formatDuration(userTimeUs / 1000, sb);
                            sb.append(" s=");
                            TimeUtils.formatDuration(systemTimeUs / 1000, sb);
                            sb.append(" p=").append(powerMaUs / 1000).append("mAms\n");
                        }

                        if (numWakelocksF > 0) {
                            // We have wakelocks being held, so only give a portion of the
                            // time to the process. The rest will be distributed among wakelock
                            // holders.
                            userTimeUs = (userTimeUs * wakelockWeight) / 100;
                            systemTimeUs = (systemTimeUs * wakelockWeight) / 100;
                        }

                        if (sb != null) {
                            sb.append("  adding to uid=").append(u.mUid).append(": u=");
                            TimeUtils.formatDuration(userTimeUs / 1000, sb);
                            sb.append(" s=");
                            TimeUtils.formatDuration(systemTimeUs / 1000, sb);
                            sb.append(" p=").append(powerMaUs / 1000).append("mAms");
                            Slog.d(TAG, sb.toString());
                        }

                        u.mUserCpuTime.addCountLocked(userTimeUs);
                        u.mSystemCpuTime.addCountLocked(systemTimeUs);
                        u.mCpuPower.addCountLocked(powerMaUs);

                        // Add the cpu speeds to this UID. These are used as a ratio
                        // for computing the power this UID used.
                        final int numClusters = mPowerProfile.getNumCpuClusters();
                        if (u.mCpuClusterSpeed == null || u.mCpuClusterSpeed.length !=
                                numClusters) {
                            u.mCpuClusterSpeed = new LongSamplingCounter[numClusters][];
                        }

                        for (int cluster = 0; cluster < clusterSpeeds.length; cluster++) {
                            final int speedsInCluster = mPowerProfile.getNumSpeedStepsInCpuCluster(
                                    cluster);
                            if (u.mCpuClusterSpeed[cluster] == null || speedsInCluster !=
                                    u.mCpuClusterSpeed[cluster].length) {
                                u.mCpuClusterSpeed[cluster] =
                                        new LongSamplingCounter[speedsInCluster];
                            }

                            final LongSamplingCounter[] cpuSpeeds = u.mCpuClusterSpeed[cluster];
                            for (int speed = 0; speed < clusterSpeeds[cluster].length; speed++) {
                                if (cpuSpeeds[speed] == null) {
                                    cpuSpeeds[speed] = new LongSamplingCounter(mOnBatteryTimeBase);
                                }
                                cpuSpeeds[speed].addCountLocked(clusterSpeeds[cluster][speed]);
                            }
                        }
                    }
                });

        if (DEBUG_ENERGY_CPU) {
            Slog.d(TAG, "Reading cpu stats took " + (SystemClock.elapsedRealtime() - startTimeMs) +
                    " ms");
        }

        if (mOnBatteryInternal && numWakelocks > 0) {
            // Distribute a portion of the total cpu time to wakelock holders.
            mTempTotalCpuUserTimeUs = (mTempTotalCpuUserTimeUs * (100 - wakelockWeight)) / 100;
            mTempTotalCpuSystemTimeUs =
                    (mTempTotalCpuSystemTimeUs * (100 - wakelockWeight)) / 100;

            for (int i = 0; i < numPartialTimers; i++) {
                final StopwatchTimer timer = mPartialTimers.get(i);

                // The system does not share any blame, as it is usually holding the wakelock
                // on behalf of an app.
                if (timer.mInList && timer.mUid != null && timer.mUid.mUid != Process.SYSTEM_UID) {
                    int userTimeUs = (int) (mTempTotalCpuUserTimeUs / numWakelocks);
                    int systemTimeUs = (int) (mTempTotalCpuSystemTimeUs / numWakelocks);

                    if (DEBUG_ENERGY_CPU) {
                        StringBuilder sb = new StringBuilder();
                        sb.append("  Distributing wakelock uid=").append(timer.mUid.mUid)
                                .append(": u=");
                        TimeUtils.formatDuration(userTimeUs / 1000, sb);
                        sb.append(" s=");
                        TimeUtils.formatDuration(systemTimeUs / 1000, sb);
                        Slog.d(TAG, sb.toString());
                    }

                    timer.mUid.mUserCpuTime.addCountLocked(userTimeUs);
                    timer.mUid.mSystemCpuTime.addCountLocked(systemTimeUs);

                    final Uid.Proc proc = timer.mUid.getProcessStatsLocked("*wakelock*");
                    proc.addCpuTimeLocked(userTimeUs / 1000, systemTimeUs / 1000);

                    mTempTotalCpuUserTimeUs -= userTimeUs;
                    mTempTotalCpuSystemTimeUs -= systemTimeUs;
                    numWakelocks--;
                }
            }

            if (mTempTotalCpuUserTimeUs > 0 || mTempTotalCpuSystemTimeUs > 0) {
                // Anything left over is given to the system.
                if (DEBUG_ENERGY_CPU) {
                    StringBuilder sb = new StringBuilder();
                    sb.append("  Distributing lost time to system: u=");
                    TimeUtils.formatDuration(mTempTotalCpuUserTimeUs / 1000, sb);
                    sb.append(" s=");
                    TimeUtils.formatDuration(mTempTotalCpuSystemTimeUs / 1000, sb);
                    Slog.d(TAG, sb.toString());
                }

                final Uid u = getUidStatsLocked(Process.SYSTEM_UID);
                u.mUserCpuTime.addCountLocked(mTempTotalCpuUserTimeUs);
                u.mSystemCpuTime.addCountLocked(mTempTotalCpuSystemTimeUs);

                final Uid.Proc proc = u.getProcessStatsLocked("*lost*");
                proc.addCpuTimeLocked((int) mTempTotalCpuUserTimeUs / 1000,
                        (int) mTempTotalCpuSystemTimeUs / 1000);
            }
        }

        // See if there is a difference in wakelocks between this collection and the last
        // collection.
        if (ArrayUtils.referenceEquals(mPartialTimers, mLastPartialTimers)) {
            // No difference, so each timer is now considered for the next collection.
            for (int i = 0; i < numPartialTimers; i++) {
                mPartialTimers.get(i).mInList = true;
            }
        } else {
            // The lists are different, meaning we added (or removed a timer) since the last
            // collection.
            final int numLastPartialTimers = mLastPartialTimers.size();
            for (int i = 0; i < numLastPartialTimers; i++) {
                mLastPartialTimers.get(i).mInList = false;
            }
            mLastPartialTimers.clear();

            // Mark the current timers as gone through a collection.
            for (int i = 0; i < numPartialTimers; i++) {
                final StopwatchTimer timer = mPartialTimers.get(i);
                timer.mInList = true;
                mLastPartialTimers.add(timer);
            }
        }
    }

    boolean setChargingLocked(boolean charging) {
        if (mCharging != charging) {
            mCharging = charging;
            if (charging) {
                mHistoryCur.states2 |= HistoryItem.STATE2_CHARGING_FLAG;
            } else {
                mHistoryCur.states2 &= ~HistoryItem.STATE2_CHARGING_FLAG;
            }
            mHandler.sendEmptyMessage(MSG_REPORT_CHARGING);
            return true;
        }
        return false;
    }

    void setOnBatteryLocked(final long mSecRealtime, final long mSecUptime, final boolean onBattery,
            final int oldStatus, final int level) {
        boolean doWrite = false;
        Message m = mHandler.obtainMessage(MSG_REPORT_POWER_CHANGE);
        m.arg1 = onBattery ? 1 : 0;
        mHandler.sendMessage(m);

        final long uptime = mSecUptime * 1000;
        final long realtime = mSecRealtime * 1000;
        final boolean screenOn = mScreenState == Display.STATE_ON;
        if (onBattery) {
            // We will reset our status if we are unplugging after the
            // battery was last full, or the level is at 100, or
            // we have gone through a significant charge (from a very low
            // level to a now very high level).
            boolean reset = false;
            if (!mNoAutoReset && (oldStatus == BatteryManager.BATTERY_STATUS_FULL
                    || level >= 90
                    || (mDischargeCurrentLevel < 20 && level >= 80)
                    || (getHighDischargeAmountSinceCharge() >= 200
                            && mHistoryBuffer.dataSize() >= MAX_HISTORY_BUFFER))) {
                Slog.i(TAG, "Resetting battery stats: level=" + level + " status=" + oldStatus
                        + " dischargeLevel=" + mDischargeCurrentLevel
                        + " lowAmount=" + getLowDischargeAmountSinceCharge()
                        + " highAmount=" + getHighDischargeAmountSinceCharge());
                // Before we write, collect a snapshot of the final aggregated
                // stats to be reported in the next checkin.  Only do this if we have
                // a sufficient amount of data to make it interesting.
                if (getLowDischargeAmountSinceCharge() >= 20) {
                    final Parcel parcel = Parcel.obtain();
                    writeSummaryToParcel(parcel, true);
                    BackgroundThread.getHandler().post(new Runnable() {
                        @Override public void run() {
                            synchronized (mCheckinFile) {
                                FileOutputStream stream = null;
                                try {
                                    stream = mCheckinFile.startWrite();
                                    stream.write(parcel.marshall());
                                    stream.flush();
                                    FileUtils.sync(stream);
                                    stream.close();
                                    mCheckinFile.finishWrite(stream);
                                } catch (IOException e) {
                                    Slog.w("BatteryStats",
                                            "Error writing checkin battery statistics", e);
                                    mCheckinFile.failWrite(stream);
                                } finally {
                                    parcel.recycle();
                                }
                            }
                        }
                    });
                }
                doWrite = true;
                resetAllStatsLocked();
                mDischargeStartLevel = level;
                reset = true;
                mDischargeStepTracker.init();
            }
            if (mCharging) {
                setChargingLocked(false);
            }
            mLastChargingStateLevel = level;
            mOnBattery = mOnBatteryInternal = true;
            mLastDischargeStepLevel = level;
            mMinDischargeStepLevel = level;
            mDischargeStepTracker.clearTime();
            mDailyDischargeStepTracker.clearTime();
            mInitStepMode = mCurStepMode;
            mModStepMode = 0;
            pullPendingStateUpdatesLocked();
            mHistoryCur.batteryLevel = (byte)level;
            mHistoryCur.states &= ~HistoryItem.STATE_BATTERY_PLUGGED_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Battery unplugged to: "
                    + Integer.toHexString(mHistoryCur.states));
            if (reset) {
                mRecordingHistory = true;
                startRecordingHistory(mSecRealtime, mSecUptime, reset);
            }
            addHistoryRecordLocked(mSecRealtime, mSecUptime);
            mDischargeCurrentLevel = mDischargeUnplugLevel = level;
            if (screenOn) {
                mDischargeScreenOnUnplugLevel = level;
                mDischargeScreenOffUnplugLevel = 0;
            } else {
                mDischargeScreenOnUnplugLevel = 0;
                mDischargeScreenOffUnplugLevel = level;
            }
            mDischargeAmountScreenOn = 0;
            mDischargeAmountScreenOff = 0;
            updateTimeBasesLocked(true, !screenOn, uptime, realtime);
        } else {
            mLastChargingStateLevel = level;
            mOnBattery = mOnBatteryInternal = false;
            pullPendingStateUpdatesLocked();
            mHistoryCur.batteryLevel = (byte)level;
            mHistoryCur.states |= HistoryItem.STATE_BATTERY_PLUGGED_FLAG;
            if (DEBUG_HISTORY) Slog.v(TAG, "Battery plugged to: "
                    + Integer.toHexString(mHistoryCur.states));
            addHistoryRecordLocked(mSecRealtime, mSecUptime);
            mDischargeCurrentLevel = mDischargePlugLevel = level;
            if (level < mDischargeUnplugLevel) {
                mLowDischargeAmountSinceCharge += mDischargeUnplugLevel-level-1;
                mHighDischargeAmountSinceCharge += mDischargeUnplugLevel-level;
            }
            updateDischargeScreenLevelsLocked(screenOn, screenOn);
            updateTimeBasesLocked(false, !screenOn, uptime, realtime);
            mChargeStepTracker.init();
            mLastChargeStepLevel = level;
            mMaxChargeStepLevel = level;
            mInitStepMode = mCurStepMode;
            mModStepMode = 0;
        }
        if (doWrite || (mLastWriteTime + (60 * 1000)) < mSecRealtime) {
            if (mFile != null) {
                writeAsyncLocked();
            }
        }
    }

    private void startRecordingHistory(final long elapsedRealtimeMs, final long uptimeMs,
            boolean reset) {
        mRecordingHistory = true;
        mHistoryCur.currentTime = System.currentTimeMillis();
        addHistoryBufferLocked(elapsedRealtimeMs, uptimeMs,
                reset ? HistoryItem.CMD_RESET : HistoryItem.CMD_CURRENT_TIME,
                mHistoryCur);
        mHistoryCur.currentTime = 0;
        if (reset) {
            initActiveHistoryEventsLocked(elapsedRealtimeMs, uptimeMs);
        }
    }

    private void recordCurrentTimeChangeLocked(final long currentTime, final long elapsedRealtimeMs,
            final long uptimeMs) {
        if (mRecordingHistory) {
            mHistoryCur.currentTime = currentTime;
            addHistoryBufferLocked(elapsedRealtimeMs, uptimeMs, HistoryItem.CMD_CURRENT_TIME,
                    mHistoryCur);
            mHistoryCur.currentTime = 0;
        }
    }

    private void recordShutdownLocked(final long elapsedRealtimeMs, final long uptimeMs) {
        if (mRecordingHistory) {
            mHistoryCur.currentTime = System.currentTimeMillis();
            addHistoryBufferLocked(elapsedRealtimeMs, uptimeMs, HistoryItem.CMD_SHUTDOWN,
                    mHistoryCur);
            mHistoryCur.currentTime = 0;
        }
    }

    private void scheduleSyncExternalStatsLocked(String reason, int updateFlags) {
        if (mExternalSync != null) {
            mExternalSync.scheduleSync(reason, updateFlags);
        }
    }

    // This should probably be exposed in the API, though it's not critical
    public static final int BATTERY_PLUGGED_NONE = 0;

    public void setBatteryStateLocked(int status, int health, int plugType, int level,
            int temp, int volt) {
        final boolean onBattery = plugType == BATTERY_PLUGGED_NONE;
        final long uptime = SystemClock.uptimeMillis();
        final long elapsedRealtime = SystemClock.elapsedRealtime();
        if (!mHaveBatteryLevel) {
            mHaveBatteryLevel = true;
            // We start out assuming that the device is plugged in (not
            // on battery).  If our first report is now that we are indeed
            // plugged in, then twiddle our state to correctly reflect that
            // since we won't be going through the full setOnBattery().
            if (onBattery == mOnBattery) {
                if (onBattery) {
                    mHistoryCur.states &= ~HistoryItem.STATE_BATTERY_PLUGGED_FLAG;
                } else {
                    mHistoryCur.states |= HistoryItem.STATE_BATTERY_PLUGGED_FLAG;
                }
            }
            // Always start out assuming charging, that will be updated later.
            mHistoryCur.states2 |= HistoryItem.STATE2_CHARGING_FLAG;
            mHistoryCur.batteryStatus = (byte)status;
            mHistoryCur.batteryLevel = (byte)level;
            mMaxChargeStepLevel = mMinDischargeStepLevel =
                    mLastChargeStepLevel = mLastDischargeStepLevel = level;
            mLastChargingStateLevel = level;
        } else if (mCurrentBatteryLevel != level || mOnBattery != onBattery) {
            recordDailyStatsIfNeededLocked(level >= 100 && onBattery);
        }
        int oldStatus = mHistoryCur.batteryStatus;
        if (onBattery) {
            mDischargeCurrentLevel = level;
            if (!mRecordingHistory) {
                mRecordingHistory = true;
                startRecordingHistory(elapsedRealtime, uptime, true);
            }
        } else if (level < 96) {
            if (!mRecordingHistory) {
                mRecordingHistory = true;
                startRecordingHistory(elapsedRealtime, uptime, true);
            }
        }
        mCurrentBatteryLevel = level;
        if (mDischargePlugLevel < 0) {
            mDischargePlugLevel = level;
        }
        if (onBattery != mOnBattery) {
            mHistoryCur.batteryLevel = (byte)level;
            mHistoryCur.batteryStatus = (byte)status;
            mHistoryCur.batteryHealth = (byte)health;
            mHistoryCur.batteryPlugType = (byte)plugType;
            mHistoryCur.batteryTemperature = (short)temp;
            mHistoryCur.batteryVoltage = (char)volt;
            setOnBatteryLocked(elapsedRealtime, uptime, onBattery, oldStatus, level);
        } else {
            boolean changed = false;
            if (mHistoryCur.batteryLevel != level) {
                mHistoryCur.batteryLevel = (byte)level;
                changed = true;

                // TODO(adamlesinski): Schedule the creation of a HistoryStepDetails record
                // which will pull external stats.
                scheduleSyncExternalStatsLocked("battery-level", ExternalStatsSync.UPDATE_ALL);
            }
            if (mHistoryCur.batteryStatus != status) {
                mHistoryCur.batteryStatus = (byte)status;
                changed = true;
            }
            if (mHistoryCur.batteryHealth != health) {
                mHistoryCur.batteryHealth = (byte)health;
                changed = true;
            }
            if (mHistoryCur.batteryPlugType != plugType) {
                mHistoryCur.batteryPlugType = (byte)plugType;
                changed = true;
            }
            if (temp >= (mHistoryCur.batteryTemperature+10)
                    || temp <= (mHistoryCur.batteryTemperature-10)) {
                mHistoryCur.batteryTemperature = (short)temp;
                changed = true;
            }
            if (volt > (mHistoryCur.batteryVoltage+20)
                    || volt < (mHistoryCur.batteryVoltage-20)) {
                mHistoryCur.batteryVoltage = (char)volt;
                changed = true;
            }
            long modeBits = (((long)mInitStepMode) << STEP_LEVEL_INITIAL_MODE_SHIFT)
                    | (((long)mModStepMode) << STEP_LEVEL_MODIFIED_MODE_SHIFT)
                    | (((long)(level&0xff)) << STEP_LEVEL_LEVEL_SHIFT);
            if (onBattery) {
                changed |= setChargingLocked(false);
                if (mLastDischargeStepLevel != level && mMinDischargeStepLevel > level) {
                    mDischargeStepTracker.addLevelSteps(mLastDischargeStepLevel - level,
                            modeBits, elapsedRealtime);
                    mDailyDischargeStepTracker.addLevelSteps(mLastDischargeStepLevel - level,
                            modeBits, elapsedRealtime);
                    mLastDischargeStepLevel = level;
                    mMinDischargeStepLevel = level;
                    mInitStepMode = mCurStepMode;
                    mModStepMode = 0;
                }
            } else {
                if (level >= 90) {
                    // If the battery level is at least 90%, always consider the device to be
                    // charging even if it happens to go down a level.
                    changed |= setChargingLocked(true);
                    mLastChargeStepLevel = level;
                } if (!mCharging) {
                    if (mLastChargeStepLevel < level) {
                        // We have not reporting that we are charging, but the level has now
                        // gone up, so consider the state to be charging.
                        changed |= setChargingLocked(true);
                        mLastChargeStepLevel = level;
                    }
                } else {
                    if (mLastChargeStepLevel > level) {
                        // We had reported that the device was charging, but here we are with
                        // power connected and the level going down.  Looks like the current
                        // power supplied isn't enough, so consider the device to now be
                        // discharging.
                        changed |= setChargingLocked(false);
                        mLastChargeStepLevel = level;
                    }
                }
                if (mLastChargeStepLevel != level && mMaxChargeStepLevel < level) {
                    mChargeStepTracker.addLevelSteps(level - mLastChargeStepLevel,
                            modeBits, elapsedRealtime);
                    mDailyChargeStepTracker.addLevelSteps(level - mLastChargeStepLevel,
                            modeBits, elapsedRealtime);
                    mLastChargeStepLevel = level;
                    mMaxChargeStepLevel = level;
                    mInitStepMode = mCurStepMode;
                    mModStepMode = 0;
                }
            }
            if (changed) {
                addHistoryRecordLocked(elapsedRealtime, uptime);
            }
        }
        if (!onBattery && status == BatteryManager.BATTERY_STATUS_FULL) {
            // We don't record history while we are plugged in and fully charged.
            // The next time we are unplugged, history will be cleared.
            mRecordingHistory = DEBUG;
        }
    }

    public long getAwakeTimeBattery() {
        return computeBatteryUptime(getBatteryUptimeLocked(), STATS_CURRENT);
    }

    public long getAwakeTimePlugged() {
        return (SystemClock.uptimeMillis() * 1000) - getAwakeTimeBattery();
    }

    @Override
    public long computeUptime(long curTime, int which) {
        switch (which) {
            case STATS_SINCE_CHARGED: return mUptime + (curTime-mUptimeStart);
            case STATS_CURRENT: return (curTime-mUptimeStart);
            case STATS_SINCE_UNPLUGGED: return (curTime-mOnBatteryTimeBase.getUptimeStart());
        }
        return 0;
    }

    @Override
    public long computeRealtime(long curTime, int which) {
        switch (which) {
            case STATS_SINCE_CHARGED: return mRealtime + (curTime-mRealtimeStart);
            case STATS_CURRENT: return (curTime-mRealtimeStart);
            case STATS_SINCE_UNPLUGGED: return (curTime-mOnBatteryTimeBase.getRealtimeStart());
        }
        return 0;
    }

    @Override
    public long computeBatteryUptime(long curTime, int which) {
        return mOnBatteryTimeBase.computeUptime(curTime, which);
    }

    @Override
    public long computeBatteryRealtime(long curTime, int which) {
        return mOnBatteryTimeBase.computeRealtime(curTime, which);
    }

    @Override
    public long computeBatteryScreenOffUptime(long curTime, int which) {
        return mOnBatteryScreenOffTimeBase.computeUptime(curTime, which);
    }

    @Override
    public long computeBatteryScreenOffRealtime(long curTime, int which) {
        return mOnBatteryScreenOffTimeBase.computeRealtime(curTime, which);
    }

    private long computeTimePerLevel(long[] steps, int numSteps) {
        // For now we'll do a simple average across all steps.
        if (numSteps <= 0) {
            return -1;
        }
        long total = 0;
        for (int i=0; i<numSteps; i++) {
            total += steps[i] & STEP_LEVEL_TIME_MASK;
        }
        return total / numSteps;
        /*
        long[] buckets = new long[numSteps];
        int numBuckets = 0;
        int numToAverage = 4;
        int i = 0;
        while (i < numSteps) {
            long totalTime = 0;
            int num = 0;
            for (int j=0; j<numToAverage && (i+j)<numSteps; j++) {
                totalTime += steps[i+j] & STEP_LEVEL_TIME_MASK;
                num++;
            }
            buckets[numBuckets] = totalTime / num;
            numBuckets++;
            numToAverage *= 2;
            i += num;
        }
        if (numBuckets < 1) {
            return -1;
        }
        long averageTime = buckets[numBuckets-1];
        for (i=numBuckets-2; i>=0; i--) {
            averageTime = (averageTime + buckets[i]) / 2;
        }
        return averageTime;
        */
    }

    @Override
    public long computeBatteryTimeRemaining(long curTime) {
        if (!mOnBattery) {
            return -1;
        }
        /* Simple implementation just looks at the average discharge per level across the
           entire sample period.
        int discharge = (getLowDischargeAmountSinceCharge()+getHighDischargeAmountSinceCharge())/2;
        if (discharge < 2) {
            return -1;
        }
        long duration = computeBatteryRealtime(curTime, STATS_SINCE_CHARGED);
        if (duration < 1000*1000) {
            return -1;
        }
        long usPerLevel = duration/discharge;
        return usPerLevel * mCurrentBatteryLevel;
        */
        if (mDischargeStepTracker.mNumStepDurations < 1) {
            return -1;
        }
        long msPerLevel = mDischargeStepTracker.computeTimePerLevel();
        if (msPerLevel <= 0) {
            return -1;
        }
        return (msPerLevel * mCurrentBatteryLevel) * 1000;
    }

    @Override
    public LevelStepTracker getDischargeLevelStepTracker() {
        return mDischargeStepTracker;
    }

    @Override
    public LevelStepTracker getDailyDischargeLevelStepTracker() {
        return mDailyDischargeStepTracker;
    }

    @Override
    public long computeChargeTimeRemaining(long curTime) {
        if (mOnBattery) {
            // Not yet working.
            return -1;
        }
        /* Broken
        int curLevel = mCurrentBatteryLevel;
        int plugLevel = mDischargePlugLevel;
        if (plugLevel < 0 || curLevel < (plugLevel+1)) {
            return -1;
        }
        long duration = computeBatteryRealtime(curTime, STATS_SINCE_UNPLUGGED);
        if (duration < 1000*1000) {
            return -1;
        }
        long usPerLevel = duration/(curLevel-plugLevel);
        return usPerLevel * (100-curLevel);
        */
        if (mChargeStepTracker.mNumStepDurations < 1) {
            return -1;
        }
        long msPerLevel = mChargeStepTracker.computeTimePerLevel();
        if (msPerLevel <= 0) {
            return -1;
        }
        return (msPerLevel * (100-mCurrentBatteryLevel)) * 1000;
    }

    @Override
    public LevelStepTracker getChargeLevelStepTracker() {
        return mChargeStepTracker;
    }

    @Override
    public LevelStepTracker getDailyChargeLevelStepTracker() {
        return mDailyChargeStepTracker;
    }

    @Override
    public ArrayList<PackageChange> getDailyPackageChanges() {
        return mDailyPackageChanges;
    }

    long getBatteryUptimeLocked() {
        return mOnBatteryTimeBase.getUptime(SystemClock.uptimeMillis() * 1000);
    }

    @Override
    public long getBatteryUptime(long curTime) {
        return mOnBatteryTimeBase.getUptime(curTime);
    }

    @Override
    public long getBatteryRealtime(long curTime) {
        return mOnBatteryTimeBase.getRealtime(curTime);
    }

    @Override
    public int getDischargeStartLevel() {
        synchronized(this) {
            return getDischargeStartLevelLocked();
        }
    }

    public int getDischargeStartLevelLocked() {
            return mDischargeUnplugLevel;
    }

    @Override
    public int getDischargeCurrentLevel() {
        synchronized(this) {
            return getDischargeCurrentLevelLocked();
        }
    }

    public int getDischargeCurrentLevelLocked() {
        return mDischargeCurrentLevel;
    }

    @Override
    public int getLowDischargeAmountSinceCharge() {
        synchronized(this) {
            int val = mLowDischargeAmountSinceCharge;
            if (mOnBattery && mDischargeCurrentLevel < mDischargeUnplugLevel) {
                val += mDischargeUnplugLevel-mDischargeCurrentLevel-1;
            }
            return val;
        }
    }

    @Override
    public int getHighDischargeAmountSinceCharge() {
        synchronized(this) {
            int val = mHighDischargeAmountSinceCharge;
            if (mOnBattery && mDischargeCurrentLevel < mDischargeUnplugLevel) {
                val += mDischargeUnplugLevel-mDischargeCurrentLevel;
            }
            return val;
        }
    }

    @Override
    public int getDischargeAmount(int which) {
        int dischargeAmount = which == STATS_SINCE_CHARGED
                ? getHighDischargeAmountSinceCharge()
                : (getDischargeStartLevel() - getDischargeCurrentLevel());
        if (dischargeAmount < 0) {
            dischargeAmount = 0;
        }
        return dischargeAmount;
    }

    public int getDischargeAmountScreenOn() {
        synchronized(this) {
            int val = mDischargeAmountScreenOn;
            if (mOnBattery && mScreenState == Display.STATE_ON
                    && mDischargeCurrentLevel < mDischargeScreenOnUnplugLevel) {
                val += mDischargeScreenOnUnplugLevel-mDischargeCurrentLevel;
            }
            return val;
        }
    }

    public int getDischargeAmountScreenOnSinceCharge() {
        synchronized(this) {
            int val = mDischargeAmountScreenOnSinceCharge;
            if (mOnBattery && mScreenState == Display.STATE_ON
                    && mDischargeCurrentLevel < mDischargeScreenOnUnplugLevel) {
                val += mDischargeScreenOnUnplugLevel-mDischargeCurrentLevel;
            }
            return val;
        }
    }

    public int getDischargeAmountScreenOff() {
        synchronized(this) {
            int val = mDischargeAmountScreenOff;
            if (mOnBattery && mScreenState != Display.STATE_ON
                    && mDischargeCurrentLevel < mDischargeScreenOffUnplugLevel) {
                val += mDischargeScreenOffUnplugLevel-mDischargeCurrentLevel;
            }
            return val;
        }
    }

    public int getDischargeAmountScreenOffSinceCharge() {
        synchronized(this) {
            int val = mDischargeAmountScreenOffSinceCharge;
            if (mOnBattery && mScreenState != Display.STATE_ON
                    && mDischargeCurrentLevel < mDischargeScreenOffUnplugLevel) {
                val += mDischargeScreenOffUnplugLevel-mDischargeCurrentLevel;
            }
            return val;
        }
    }

    /**
     * Retrieve the statistics object for a particular uid, creating if needed.
     */
    public Uid getUidStatsLocked(int uid) {
        Uid u = mUidStats.get(uid);
        if (u == null) {
            u = new Uid(uid);
            mUidStats.put(uid, u);
        }
        return u;
    }

    /**
     * Remove the statistics object for a particular uid.
     */
    public void removeUidStatsLocked(int uid) {
        mKernelUidCpuTimeReader.removeUid(uid);
        mUidStats.remove(uid);
    }

    /**
     * Retrieve the statistics object for a particular process, creating
     * if needed.
     */
    public Uid.Proc getProcessStatsLocked(int uid, String name) {
        uid = mapUid(uid);
        Uid u = getUidStatsLocked(uid);
        return u.getProcessStatsLocked(name);
    }

    /**
     * Retrieve the statistics object for a particular process, creating
     * if needed.
     */
    public Uid.Pkg getPackageStatsLocked(int uid, String pkg) {
        uid = mapUid(uid);
        Uid u = getUidStatsLocked(uid);
        return u.getPackageStatsLocked(pkg);
    }

    /**
     * Retrieve the statistics object for a particular service, creating
     * if needed.
     */
    public Uid.Pkg.Serv getServiceStatsLocked(int uid, String pkg, String name) {
        uid = mapUid(uid);
        Uid u = getUidStatsLocked(uid);
        return u.getServiceStatsLocked(pkg, name);
    }

    public void shutdownLocked() {
        recordShutdownLocked(SystemClock.elapsedRealtime(), SystemClock.uptimeMillis());
        writeSyncLocked();
        mShuttingDown = true;
    }

    Parcel mPendingWrite = null;
    final ReentrantLock mWriteLock = new ReentrantLock();

    public void writeAsyncLocked() {
        writeLocked(false);
    }

    public void writeSyncLocked() {
        writeLocked(true);
    }

    void writeLocked(boolean sync) {
        if (mFile == null) {
            Slog.w("BatteryStats", "writeLocked: no file associated with this instance");
            return;
        }

        if (mShuttingDown) {
            return;
        }

        Parcel out = Parcel.obtain();
        writeSummaryToParcel(out, true);
        mLastWriteTime = SystemClock.elapsedRealtime();

        if (mPendingWrite != null) {
            mPendingWrite.recycle();
        }
        mPendingWrite = out;

        if (sync) {
            commitPendingDataToDisk();
        } else {
            BackgroundThread.getHandler().post(new Runnable() {
                @Override public void run() {
                    commitPendingDataToDisk();
                }
            });
        }
    }

    public void commitPendingDataToDisk() {
        final Parcel next;
        synchronized (this) {
            next = mPendingWrite;
            mPendingWrite = null;
            if (next == null) {
                return;
            }

            mWriteLock.lock();
        }

        try {
            FileOutputStream stream = new FileOutputStream(mFile.chooseForWrite());
            stream.write(next.marshall());
            stream.flush();
            FileUtils.sync(stream);
            stream.close();
            mFile.commit();
        } catch (IOException e) {
            Slog.w("BatteryStats", "Error writing battery statistics", e);
            mFile.rollback();
        } finally {
            next.recycle();
            mWriteLock.unlock();
        }
    }

    public void readLocked() {
        if (mDailyFile != null) {
            readDailyStatsLocked();
        }

        if (mFile == null) {
            Slog.w("BatteryStats", "readLocked: no file associated with this instance");
            return;
        }

        mUidStats.clear();

        try {
            File file = mFile.chooseForRead();
            if (!file.exists()) {
                return;
            }
            FileInputStream stream = new FileInputStream(file);

            byte[] raw = BatteryStatsHelper.readFully(stream);
            Parcel in = Parcel.obtain();
            in.unmarshall(raw, 0, raw.length);
            in.setDataPosition(0);
            stream.close();

            readSummaryFromParcel(in);
        } catch(Exception e) {
            Slog.e("BatteryStats", "Error reading battery statistics", e);
            resetAllStatsLocked();
        }

        mEndPlatformVersion = Build.ID;

        if (mHistoryBuffer.dataPosition() > 0) {
            mRecordingHistory = true;
            final long elapsedRealtime = SystemClock.elapsedRealtime();
            final long uptime = SystemClock.uptimeMillis();
            if (USE_OLD_HISTORY) {
                addHistoryRecordLocked(elapsedRealtime, uptime, HistoryItem.CMD_START, mHistoryCur);
            }
            addHistoryBufferLocked(elapsedRealtime, uptime, HistoryItem.CMD_START, mHistoryCur);
            startRecordingHistory(elapsedRealtime, uptime, false);
        }

        recordDailyStatsIfNeededLocked(false);
    }

    public int describeContents() {
        return 0;
    }

    void readHistory(Parcel in, boolean andOldHistory) throws ParcelFormatException {
        final long historyBaseTime = in.readLong();

        mHistoryBuffer.setDataSize(0);
        mHistoryBuffer.setDataPosition(0);
        mHistoryTagPool.clear();
        mNextHistoryTagIdx = 0;
        mNumHistoryTagChars = 0;

        int numTags = in.readInt();
        for (int i=0; i<numTags; i++) {
            int idx = in.readInt();
            String str = in.readString();
            if (str == null) {
                throw new ParcelFormatException("null history tag string");
            }
            int uid = in.readInt();
            HistoryTag tag = new HistoryTag();
            tag.string = str;
            tag.uid = uid;
            tag.poolIdx = idx;
            mHistoryTagPool.put(tag, idx);
            if (idx >= mNextHistoryTagIdx) {
                mNextHistoryTagIdx = idx+1;
            }
            mNumHistoryTagChars += tag.string.length() + 1;
        }

        int bufSize = in.readInt();
        int curPos = in.dataPosition();
        if (bufSize >= (MAX_MAX_HISTORY_BUFFER*3)) {
            throw new ParcelFormatException("File corrupt: history data buffer too large " +
                    bufSize);
        } else if ((bufSize&~3) != bufSize) {
            throw new ParcelFormatException("File corrupt: history data buffer not aligned " +
                    bufSize);
        } else {
            if (DEBUG_HISTORY) Slog.i(TAG, "***************** READING NEW HISTORY: " + bufSize
                    + " bytes at " + curPos);
            mHistoryBuffer.appendFrom(in, curPos, bufSize);
            in.setDataPosition(curPos + bufSize);
        }

        if (andOldHistory) {
            readOldHistory(in);
        }

        if (DEBUG_HISTORY) {
            StringBuilder sb = new StringBuilder(128);
            sb.append("****************** OLD mHistoryBaseTime: ");
            TimeUtils.formatDuration(mHistoryBaseTime, sb);
            Slog.i(TAG, sb.toString());
        }
        mHistoryBaseTime = historyBaseTime;
        if (DEBUG_HISTORY) {
            StringBuilder sb = new StringBuilder(128);
            sb.append("****************** NEW mHistoryBaseTime: ");
            TimeUtils.formatDuration(mHistoryBaseTime, sb);
            Slog.i(TAG, sb.toString());
        }

        // We are just arbitrarily going to insert 1 minute from the sample of
        // the last run until samples in this run.
        if (mHistoryBaseTime > 0) {
            long oldnow = SystemClock.elapsedRealtime();
            mHistoryBaseTime = mHistoryBaseTime - oldnow + 1;
            if (DEBUG_HISTORY) {
                StringBuilder sb = new StringBuilder(128);
                sb.append("****************** ADJUSTED mHistoryBaseTime: ");
                TimeUtils.formatDuration(mHistoryBaseTime, sb);
                Slog.i(TAG, sb.toString());
            }
        }
    }

    void readOldHistory(Parcel in) {
        if (!USE_OLD_HISTORY) {
            return;
        }
        mHistory = mHistoryEnd = mHistoryCache = null;
        long time;
        while (in.dataAvail() > 0 && (time=in.readLong()) >= 0) {
            HistoryItem rec = new HistoryItem(time, in);
            addHistoryRecordLocked(rec);
        }
    }

    void writeHistory(Parcel out, boolean inclData, boolean andOldHistory) {
        if (DEBUG_HISTORY) {
            StringBuilder sb = new StringBuilder(128);
            sb.append("****************** WRITING mHistoryBaseTime: ");
            TimeUtils.formatDuration(mHistoryBaseTime, sb);
            sb.append(" mLastHistoryElapsedRealtime: ");
            TimeUtils.formatDuration(mLastHistoryElapsedRealtime, sb);
            Slog.i(TAG, sb.toString());
        }
        out.writeLong(mHistoryBaseTime + mLastHistoryElapsedRealtime);
        if (!inclData) {
            out.writeInt(0);
            out.writeInt(0);
            return;
        }
        out.writeInt(mHistoryTagPool.size());
        for (HashMap.Entry<HistoryTag, Integer> ent : mHistoryTagPool.entrySet()) {
            HistoryTag tag = ent.getKey();
            out.writeInt(ent.getValue());
            out.writeString(tag.string);
            out.writeInt(tag.uid);
        }
        out.writeInt(mHistoryBuffer.dataSize());
        if (DEBUG_HISTORY) Slog.i(TAG, "***************** WRITING HISTORY: "
                + mHistoryBuffer.dataSize() + " bytes at " + out.dataPosition());
        out.appendFrom(mHistoryBuffer, 0, mHistoryBuffer.dataSize());

        if (andOldHistory) {
            writeOldHistory(out);
        }
    }

    void writeOldHistory(Parcel out) {
        if (!USE_OLD_HISTORY) {
            return;
        }
        HistoryItem rec = mHistory;
        while (rec != null) {
            if (rec.time >= 0) rec.writeToParcel(out, 0);
            rec = rec.next;
        }
        out.writeLong(-1);
    }

    public void readSummaryFromParcel(Parcel in) throws ParcelFormatException {
        final int version = in.readInt();
        if (version != VERSION) {
            Slog.w("BatteryStats", "readFromParcel: version got " + version
                + ", expected " + VERSION + "; erasing old stats");
            return;
        }

        readHistory(in, true);

        mStartCount = in.readInt();
        mUptime = in.readLong();
        mRealtime = in.readLong();
        mStartClockTime = in.readLong();
        mStartPlatformVersion = in.readString();
        mEndPlatformVersion = in.readString();
        mOnBatteryTimeBase.readSummaryFromParcel(in);
        mOnBatteryScreenOffTimeBase.readSummaryFromParcel(in);
        mDischargeUnplugLevel = in.readInt();
        mDischargePlugLevel = in.readInt();
        mDischargeCurrentLevel = in.readInt();
        mCurrentBatteryLevel = in.readInt();
        mLowDischargeAmountSinceCharge = in.readInt();
        mHighDischargeAmountSinceCharge = in.readInt();
        mDischargeAmountScreenOnSinceCharge = in.readInt();
        mDischargeAmountScreenOffSinceCharge = in.readInt();
        mDischargeStepTracker.readFromParcel(in);
        mChargeStepTracker.readFromParcel(in);
        mDailyDischargeStepTracker.readFromParcel(in);
        mDailyChargeStepTracker.readFromParcel(in);
        int NPKG = in.readInt();
        if (NPKG > 0) {
            mDailyPackageChanges = new ArrayList<>(NPKG);
            while (NPKG > 0) {
                NPKG--;
                PackageChange pc = new PackageChange();
                pc.mPackageName = in.readString();
                pc.mUpdate = in.readInt() != 0;
                pc.mVersionCode = in.readInt();
                mDailyPackageChanges.add(pc);
            }
        } else {
            mDailyPackageChanges = null;
        }
        mDailyStartTime = in.readLong();
        mNextMinDailyDeadline = in.readLong();
        mNextMaxDailyDeadline = in.readLong();

        mStartCount++;

        mScreenState = Display.STATE_UNKNOWN;
        mScreenOnTimer.readSummaryFromParcelLocked(in);
        for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
            mScreenBrightnessTimer[i].readSummaryFromParcelLocked(in);
        }
        mInteractive = false;
        mInteractiveTimer.readSummaryFromParcelLocked(in);
        mPhoneOn = false;
        mPowerSaveModeEnabledTimer.readSummaryFromParcelLocked(in);
        mLongestLightIdleTime = in.readLong();
        mLongestFullIdleTime = in.readLong();
        mDeviceIdleModeLightTimer.readSummaryFromParcelLocked(in);
        mDeviceIdleModeFullTimer.readSummaryFromParcelLocked(in);
        mDeviceLightIdlingTimer.readSummaryFromParcelLocked(in);
        mDeviceIdlingTimer.readSummaryFromParcelLocked(in);
        mPhoneOnTimer.readSummaryFromParcelLocked(in);
        for (int i=0; i<SignalStrength.NUM_SIGNAL_STRENGTH_BINS; i++) {
            mPhoneSignalStrengthsTimer[i].readSummaryFromParcelLocked(in);
        }
        mPhoneSignalScanningTimer.readSummaryFromParcelLocked(in);
        for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
            mPhoneDataConnectionsTimer[i].readSummaryFromParcelLocked(in);
        }
        for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
            mNetworkByteActivityCounters[i].readSummaryFromParcelLocked(in);
            mNetworkPacketActivityCounters[i].readSummaryFromParcelLocked(in);
        }
        mMobileRadioPowerState = DataConnectionRealTimeInfo.DC_POWER_STATE_LOW;
        mMobileRadioActiveTimer.readSummaryFromParcelLocked(in);
        mMobileRadioActivePerAppTimer.readSummaryFromParcelLocked(in);
        mMobileRadioActiveAdjustedTime.readSummaryFromParcelLocked(in);
        mMobileRadioActiveUnknownTime.readSummaryFromParcelLocked(in);
        mMobileRadioActiveUnknownCount.readSummaryFromParcelLocked(in);
        mWifiRadioPowerState = DataConnectionRealTimeInfo.DC_POWER_STATE_LOW;
        mWifiOn = false;
        mWifiOnTimer.readSummaryFromParcelLocked(in);
        mGlobalWifiRunning = false;
        mGlobalWifiRunningTimer.readSummaryFromParcelLocked(in);
        for (int i=0; i<NUM_WIFI_STATES; i++) {
            mWifiStateTimer[i].readSummaryFromParcelLocked(in);
        }
        for (int i=0; i<NUM_WIFI_SUPPL_STATES; i++) {
            mWifiSupplStateTimer[i].readSummaryFromParcelLocked(in);
        }
        for (int i=0; i<NUM_WIFI_SIGNAL_STRENGTH_BINS; i++) {
            mWifiSignalStrengthsTimer[i].readSummaryFromParcelLocked(in);
        }
        mWifiActivity.readSummaryFromParcel(in);
        mBluetoothActivity.readSummaryFromParcel(in);
        mModemActivity.readSummaryFromParcel(in);
        mHasWifiReporting = in.readInt() != 0;
        mHasBluetoothReporting = in.readInt() != 0;
        mHasModemReporting = in.readInt() != 0;

        mNumConnectivityChange = mLoadedNumConnectivityChange = in.readInt();
        mFlashlightOnNesting = 0;
        mFlashlightOnTimer.readSummaryFromParcelLocked(in);
        mCameraOnNesting = 0;
        mCameraOnTimer.readSummaryFromParcelLocked(in);
        mBluetoothScanNesting = 0;
        mBluetoothScanTimer.readSummaryFromParcelLocked(in);

        int NKW = in.readInt();
        if (NKW > 10000) {
            throw new ParcelFormatException("File corrupt: too many kernel wake locks " + NKW);
        }
        for (int ikw = 0; ikw < NKW; ikw++) {
            if (in.readInt() != 0) {
                String kwltName = in.readString();
                getKernelWakelockTimerLocked(kwltName).readSummaryFromParcelLocked(in);
            }
        }

        int NWR = in.readInt();
        if (NWR > 10000) {
            throw new ParcelFormatException("File corrupt: too many wakeup reasons " + NWR);
        }
        for (int iwr = 0; iwr < NWR; iwr++) {
            if (in.readInt() != 0) {
                String reasonName = in.readString();
                getWakeupReasonTimerLocked(reasonName).readSummaryFromParcelLocked(in);
            }
        }

        final int NU = in.readInt();
        if (NU > 10000) {
            throw new ParcelFormatException("File corrupt: too many uids " + NU);
        }
        for (int iu = 0; iu < NU; iu++) {
            int uid = in.readInt();
            Uid u = new Uid(uid);
            mUidStats.put(uid, u);

            u.mWifiRunning = false;
            if (in.readInt() != 0) {
                u.mWifiRunningTimer.readSummaryFromParcelLocked(in);
            }
            u.mFullWifiLockOut = false;
            if (in.readInt() != 0) {
                u.mFullWifiLockTimer.readSummaryFromParcelLocked(in);
            }
            u.mWifiScanStarted = false;
            if (in.readInt() != 0) {
                u.mWifiScanTimer.readSummaryFromParcelLocked(in);
            }
            u.mWifiBatchedScanBinStarted = Uid.NO_BATCHED_SCAN_STARTED;
            for (int i = 0; i < Uid.NUM_WIFI_BATCHED_SCAN_BINS; i++) {
                if (in.readInt() != 0) {
                    u.makeWifiBatchedScanBin(i, null);
                    u.mWifiBatchedScanTimer[i].readSummaryFromParcelLocked(in);
                }
            }
            u.mWifiMulticastEnabled = false;
            if (in.readInt() != 0) {
                u.mWifiMulticastTimer.readSummaryFromParcelLocked(in);
            }
            if (in.readInt() != 0) {
                u.createAudioTurnedOnTimerLocked().readSummaryFromParcelLocked(in);
            }
            if (in.readInt() != 0) {
                u.createVideoTurnedOnTimerLocked().readSummaryFromParcelLocked(in);
            }
            if (in.readInt() != 0) {
                u.createFlashlightTurnedOnTimerLocked().readSummaryFromParcelLocked(in);
            }
            if (in.readInt() != 0) {
                u.createCameraTurnedOnTimerLocked().readSummaryFromParcelLocked(in);
            }
            if (in.readInt() != 0) {
                u.createForegroundActivityTimerLocked().readSummaryFromParcelLocked(in);
            }
            if (in.readInt() != 0) {
                u.createBluetoothScanTimerLocked().readSummaryFromParcelLocked(in);
            }
            u.mProcessState = ActivityManager.PROCESS_STATE_NONEXISTENT;
            for (int i = 0; i < Uid.NUM_PROCESS_STATE; i++) {
                if (in.readInt() != 0) {
                    u.makeProcessState(i, null);
                    u.mProcessStateTimer[i].readSummaryFromParcelLocked(in);
                }
            }
            if (in.readInt() != 0) {
                u.createVibratorOnTimerLocked().readSummaryFromParcelLocked(in);
            }

            if (in.readInt() != 0) {
                if (u.mUserActivityCounters == null) {
                    u.initUserActivityLocked();
                }
                for (int i=0; i<Uid.NUM_USER_ACTIVITY_TYPES; i++) {
                    u.mUserActivityCounters[i].readSummaryFromParcelLocked(in);
                }
            }

            if (in.readInt() != 0) {
                if (u.mNetworkByteActivityCounters == null) {
                    u.initNetworkActivityLocked();
                }
                for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
                    u.mNetworkByteActivityCounters[i].readSummaryFromParcelLocked(in);
                    u.mNetworkPacketActivityCounters[i].readSummaryFromParcelLocked(in);
                }
                u.mMobileRadioActiveTime.readSummaryFromParcelLocked(in);
                u.mMobileRadioActiveCount.readSummaryFromParcelLocked(in);
            }

            u.mUserCpuTime.readSummaryFromParcelLocked(in);
            u.mSystemCpuTime.readSummaryFromParcelLocked(in);
            u.mCpuPower.readSummaryFromParcelLocked(in);

            if (in.readInt() != 0) {
                final int numClusters = in.readInt();
                if (mPowerProfile != null && mPowerProfile.getNumCpuClusters() != numClusters) {
                    throw new ParcelFormatException("Incompatible cpu cluster arrangement");
                }

                u.mCpuClusterSpeed = new LongSamplingCounter[numClusters][];
                for (int cluster = 0; cluster < numClusters; cluster++) {
                    if (in.readInt() != 0) {
                        final int NSB = in.readInt();
                        if (mPowerProfile != null &&
                                mPowerProfile.getNumSpeedStepsInCpuCluster(cluster) != NSB) {
                            throw new ParcelFormatException("File corrupt: too many speed bins " +
                                    NSB);
                        }

                        u.mCpuClusterSpeed[cluster] = new LongSamplingCounter[NSB];
                        for (int speed = 0; speed < NSB; speed++) {
                            if (in.readInt() != 0) {
                                u.mCpuClusterSpeed[cluster][speed] = new LongSamplingCounter(
                                        mOnBatteryTimeBase);
                                u.mCpuClusterSpeed[cluster][speed].readSummaryFromParcelLocked(in);
                            }
                        }
                    } else {
                        u.mCpuClusterSpeed[cluster] = null;
                    }
                }
            } else {
                u.mCpuClusterSpeed = null;
            }

            int NW = in.readInt();
            if (NW > 100) {
                throw new ParcelFormatException("File corrupt: too many wake locks " + NW);
            }
            for (int iw = 0; iw < NW; iw++) {
                String wlName = in.readString();
                u.readWakeSummaryFromParcelLocked(wlName, in);
            }

            int NS = in.readInt();
            if (NS > 100) {
                throw new ParcelFormatException("File corrupt: too many syncs " + NS);
            }
            for (int is = 0; is < NS; is++) {
                String name = in.readString();
                u.readSyncSummaryFromParcelLocked(name, in);
            }

            int NJ = in.readInt();
            if (NJ > 100) {
                throw new ParcelFormatException("File corrupt: too many job timers " + NJ);
            }
            for (int ij = 0; ij < NJ; ij++) {
                String name = in.readString();
                u.readJobSummaryFromParcelLocked(name, in);
            }

            int NP = in.readInt();
            if (NP > 1000) {
                throw new ParcelFormatException("File corrupt: too many sensors " + NP);
            }
            for (int is = 0; is < NP; is++) {
                int seNumber = in.readInt();
                if (in.readInt() != 0) {
                    u.getSensorTimerLocked(seNumber, true)
                            .readSummaryFromParcelLocked(in);
                }
            }

            NP = in.readInt();
            if (NP > 1000) {
                throw new ParcelFormatException("File corrupt: too many processes " + NP);
            }
            for (int ip = 0; ip < NP; ip++) {
                String procName = in.readString();
                Uid.Proc p = u.getProcessStatsLocked(procName);
                p.mUserTime = p.mLoadedUserTime = in.readLong();
                p.mSystemTime = p.mLoadedSystemTime = in.readLong();
                p.mForegroundTime = p.mLoadedForegroundTime = in.readLong();
                p.mStarts = p.mLoadedStarts = in.readInt();
                p.mNumCrashes = p.mLoadedNumCrashes = in.readInt();
                p.mNumAnrs = p.mLoadedNumAnrs = in.readInt();
                p.readExcessivePowerFromParcelLocked(in);
            }

            NP = in.readInt();
            if (NP > 10000) {
                throw new ParcelFormatException("File corrupt: too many packages " + NP);
            }
            for (int ip = 0; ip < NP; ip++) {
                String pkgName = in.readString();
                Uid.Pkg p = u.getPackageStatsLocked(pkgName);
                final int NWA = in.readInt();
                if (NWA > 1000) {
                    throw new ParcelFormatException("File corrupt: too many wakeup alarms " + NWA);
                }
                p.mWakeupAlarms.clear();
                for (int iwa=0; iwa<NWA; iwa++) {
                    String tag = in.readString();
                    Counter c = new Counter(mOnBatteryTimeBase);
                    c.readSummaryFromParcelLocked(in);
                    p.mWakeupAlarms.put(tag, c);
                }
                NS = in.readInt();
                if (NS > 1000) {
                    throw new ParcelFormatException("File corrupt: too many services " + NS);
                }
                for (int is = 0; is < NS; is++) {
                    String servName = in.readString();
                    Uid.Pkg.Serv s = u.getServiceStatsLocked(pkgName, servName);
                    s.mStartTime = s.mLoadedStartTime = in.readLong();
                    s.mStarts = s.mLoadedStarts = in.readInt();
                    s.mLaunches = s.mLoadedLaunches = in.readInt();
                }
            }
        }
    }

    /**
     * Writes a summary of the statistics to a Parcel, in a format suitable to be written to
     * disk.  This format does not allow a lossless round-trip.
     *
     * @param out the Parcel to be written to.
     */
    public void writeSummaryToParcel(Parcel out, boolean inclHistory) {
        pullPendingStateUpdatesLocked();

        // Pull the clock time.  This may update the time and make a new history entry
        // if we had originally pulled a time before the RTC was set.
        long startClockTime = getStartClockTime();

        final long NOW_SYS = SystemClock.uptimeMillis() * 1000;
        final long NOWREAL_SYS = SystemClock.elapsedRealtime() * 1000;

        out.writeInt(VERSION);

        writeHistory(out, inclHistory, true);

        out.writeInt(mStartCount);
        out.writeLong(computeUptime(NOW_SYS, STATS_SINCE_CHARGED));
        out.writeLong(computeRealtime(NOWREAL_SYS, STATS_SINCE_CHARGED));
        out.writeLong(startClockTime);
        out.writeString(mStartPlatformVersion);
        out.writeString(mEndPlatformVersion);
        mOnBatteryTimeBase.writeSummaryToParcel(out, NOW_SYS, NOWREAL_SYS);
        mOnBatteryScreenOffTimeBase.writeSummaryToParcel(out, NOW_SYS, NOWREAL_SYS);
        out.writeInt(mDischargeUnplugLevel);
        out.writeInt(mDischargePlugLevel);
        out.writeInt(mDischargeCurrentLevel);
        out.writeInt(mCurrentBatteryLevel);
        out.writeInt(getLowDischargeAmountSinceCharge());
        out.writeInt(getHighDischargeAmountSinceCharge());
        out.writeInt(getDischargeAmountScreenOnSinceCharge());
        out.writeInt(getDischargeAmountScreenOffSinceCharge());
        mDischargeStepTracker.writeToParcel(out);
        mChargeStepTracker.writeToParcel(out);
        mDailyDischargeStepTracker.writeToParcel(out);
        mDailyChargeStepTracker.writeToParcel(out);
        if (mDailyPackageChanges != null) {
            final int NPKG = mDailyPackageChanges.size();
            out.writeInt(NPKG);
            for (int i=0; i<NPKG; i++) {
                PackageChange pc = mDailyPackageChanges.get(i);
                out.writeString(pc.mPackageName);
                out.writeInt(pc.mUpdate ? 1 : 0);
                out.writeInt(pc.mVersionCode);
            }
        } else {
            out.writeInt(0);
        }
        out.writeLong(mDailyStartTime);
        out.writeLong(mNextMinDailyDeadline);
        out.writeLong(mNextMaxDailyDeadline);

        mScreenOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
            mScreenBrightnessTimer[i].writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        }
        mInteractiveTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mPowerSaveModeEnabledTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        out.writeLong(mLongestLightIdleTime);
        out.writeLong(mLongestFullIdleTime);
        mDeviceIdleModeLightTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mDeviceIdleModeFullTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mDeviceLightIdlingTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mDeviceIdlingTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mPhoneOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        for (int i=0; i<SignalStrength.NUM_SIGNAL_STRENGTH_BINS; i++) {
            mPhoneSignalStrengthsTimer[i].writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        }
        mPhoneSignalScanningTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
            mPhoneDataConnectionsTimer[i].writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        }
        for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
            mNetworkByteActivityCounters[i].writeSummaryFromParcelLocked(out);
            mNetworkPacketActivityCounters[i].writeSummaryFromParcelLocked(out);
        }
        mMobileRadioActiveTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mMobileRadioActivePerAppTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mMobileRadioActiveAdjustedTime.writeSummaryFromParcelLocked(out);
        mMobileRadioActiveUnknownTime.writeSummaryFromParcelLocked(out);
        mMobileRadioActiveUnknownCount.writeSummaryFromParcelLocked(out);
        mWifiOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mGlobalWifiRunningTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        for (int i=0; i<NUM_WIFI_STATES; i++) {
            mWifiStateTimer[i].writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        }
        for (int i=0; i<NUM_WIFI_SUPPL_STATES; i++) {
            mWifiSupplStateTimer[i].writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        }
        for (int i=0; i<NUM_WIFI_SIGNAL_STRENGTH_BINS; i++) {
            mWifiSignalStrengthsTimer[i].writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        }
        mWifiActivity.writeSummaryToParcel(out);
        mBluetoothActivity.writeSummaryToParcel(out);
        mModemActivity.writeSummaryToParcel(out);
        out.writeInt(mHasWifiReporting ? 1 : 0);
        out.writeInt(mHasBluetoothReporting ? 1 : 0);
        out.writeInt(mHasModemReporting ? 1 : 0);

        out.writeInt(mNumConnectivityChange);
        mFlashlightOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mCameraOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
        mBluetoothScanTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);

        out.writeInt(mKernelWakelockStats.size());
        for (Map.Entry<String, SamplingTimer> ent : mKernelWakelockStats.entrySet()) {
            Timer kwlt = ent.getValue();
            if (kwlt != null) {
                out.writeInt(1);
                out.writeString(ent.getKey());
                kwlt.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
        }

        out.writeInt(mWakeupReasonStats.size());
        for (Map.Entry<String, SamplingTimer> ent : mWakeupReasonStats.entrySet()) {
            SamplingTimer timer = ent.getValue();
            if (timer != null) {
                out.writeInt(1);
                out.writeString(ent.getKey());
                timer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
        }

        final int NU = mUidStats.size();
        out.writeInt(NU);
        for (int iu = 0; iu < NU; iu++) {
            out.writeInt(mUidStats.keyAt(iu));
            Uid u = mUidStats.valueAt(iu);

            if (u.mWifiRunningTimer != null) {
                out.writeInt(1);
                u.mWifiRunningTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            if (u.mFullWifiLockTimer != null) {
                out.writeInt(1);
                u.mFullWifiLockTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            if (u.mWifiScanTimer != null) {
                out.writeInt(1);
                u.mWifiScanTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            for (int i = 0; i < Uid.NUM_WIFI_BATCHED_SCAN_BINS; i++) {
                if (u.mWifiBatchedScanTimer[i] != null) {
                    out.writeInt(1);
                    u.mWifiBatchedScanTimer[i].writeSummaryFromParcelLocked(out, NOWREAL_SYS);
                } else {
                    out.writeInt(0);
                }
            }
            if (u.mWifiMulticastTimer != null) {
                out.writeInt(1);
                u.mWifiMulticastTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            if (u.mAudioTurnedOnTimer != null) {
                out.writeInt(1);
                u.mAudioTurnedOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            if (u.mVideoTurnedOnTimer != null) {
                out.writeInt(1);
                u.mVideoTurnedOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            if (u.mFlashlightTurnedOnTimer != null) {
                out.writeInt(1);
                u.mFlashlightTurnedOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            if (u.mCameraTurnedOnTimer != null) {
                out.writeInt(1);
                u.mCameraTurnedOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            if (u.mForegroundActivityTimer != null) {
                out.writeInt(1);
                u.mForegroundActivityTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            if (u.mBluetoothScanTimer != null) {
                out.writeInt(1);
                u.mBluetoothScanTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }
            for (int i = 0; i < Uid.NUM_PROCESS_STATE; i++) {
                if (u.mProcessStateTimer[i] != null) {
                    out.writeInt(1);
                    u.mProcessStateTimer[i].writeSummaryFromParcelLocked(out, NOWREAL_SYS);
                } else {
                    out.writeInt(0);
                }
            }
            if (u.mVibratorOnTimer != null) {
                out.writeInt(1);
                u.mVibratorOnTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            } else {
                out.writeInt(0);
            }

            if (u.mUserActivityCounters == null) {
                out.writeInt(0);
            } else {
                out.writeInt(1);
                for (int i=0; i<Uid.NUM_USER_ACTIVITY_TYPES; i++) {
                    u.mUserActivityCounters[i].writeSummaryFromParcelLocked(out);
                }
            }

            if (u.mNetworkByteActivityCounters == null) {
                out.writeInt(0);
            } else {
                out.writeInt(1);
                for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
                    u.mNetworkByteActivityCounters[i].writeSummaryFromParcelLocked(out);
                    u.mNetworkPacketActivityCounters[i].writeSummaryFromParcelLocked(out);
                }
                u.mMobileRadioActiveTime.writeSummaryFromParcelLocked(out);
                u.mMobileRadioActiveCount.writeSummaryFromParcelLocked(out);
            }

            u.mUserCpuTime.writeSummaryFromParcelLocked(out);
            u.mSystemCpuTime.writeSummaryFromParcelLocked(out);
            u.mCpuPower.writeSummaryFromParcelLocked(out);

            if (u.mCpuClusterSpeed != null) {
                out.writeInt(1);
                out.writeInt(u.mCpuClusterSpeed.length);
                for (LongSamplingCounter[] cpuSpeeds : u.mCpuClusterSpeed) {
                    if (cpuSpeeds != null) {
                        out.writeInt(1);
                        out.writeInt(cpuSpeeds.length);
                        for (LongSamplingCounter c : cpuSpeeds) {
                            if (c != null) {
                                out.writeInt(1);
                                c.writeSummaryFromParcelLocked(out);
                            } else {
                                out.writeInt(0);
                            }
                        }
                    } else {
                        out.writeInt(0);
                    }
                }
            } else {
                out.writeInt(0);
            }

            final ArrayMap<String, Uid.Wakelock> wakeStats = u.mWakelockStats.getMap();
            int NW = wakeStats.size();
            out.writeInt(NW);
            for (int iw=0; iw<NW; iw++) {
                out.writeString(wakeStats.keyAt(iw));
                Uid.Wakelock wl = wakeStats.valueAt(iw);
                if (wl.mTimerFull != null) {
                    out.writeInt(1);
                    wl.mTimerFull.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
                } else {
                    out.writeInt(0);
                }
                if (wl.mTimerPartial != null) {
                    out.writeInt(1);
                    wl.mTimerPartial.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
                } else {
                    out.writeInt(0);
                }
                if (wl.mTimerWindow != null) {
                    out.writeInt(1);
                    wl.mTimerWindow.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
                } else {
                    out.writeInt(0);
                }
                if (wl.mTimerDraw != null) {
                    out.writeInt(1);
                    wl.mTimerDraw.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
                } else {
                    out.writeInt(0);
                }
            }

            final ArrayMap<String, StopwatchTimer> syncStats = u.mSyncStats.getMap();
            int NS = syncStats.size();
            out.writeInt(NS);
            for (int is=0; is<NS; is++) {
                out.writeString(syncStats.keyAt(is));
                syncStats.valueAt(is).writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            }

            final ArrayMap<String, StopwatchTimer> jobStats = u.mJobStats.getMap();
            int NJ = jobStats.size();
            out.writeInt(NJ);
            for (int ij=0; ij<NJ; ij++) {
                out.writeString(jobStats.keyAt(ij));
                jobStats.valueAt(ij).writeSummaryFromParcelLocked(out, NOWREAL_SYS);
            }

            int NSE = u.mSensorStats.size();
            out.writeInt(NSE);
            for (int ise=0; ise<NSE; ise++) {
                out.writeInt(u.mSensorStats.keyAt(ise));
                Uid.Sensor se = u.mSensorStats.valueAt(ise);
                if (se.mTimer != null) {
                    out.writeInt(1);
                    se.mTimer.writeSummaryFromParcelLocked(out, NOWREAL_SYS);
                } else {
                    out.writeInt(0);
                }
            }

            int NP = u.mProcessStats.size();
            out.writeInt(NP);
            for (int ip=0; ip<NP; ip++) {
                out.writeString(u.mProcessStats.keyAt(ip));
                Uid.Proc ps = u.mProcessStats.valueAt(ip);
                out.writeLong(ps.mUserTime);
                out.writeLong(ps.mSystemTime);
                out.writeLong(ps.mForegroundTime);
                out.writeInt(ps.mStarts);
                out.writeInt(ps.mNumCrashes);
                out.writeInt(ps.mNumAnrs);
                ps.writeExcessivePowerToParcelLocked(out);
            }

            NP = u.mPackageStats.size();
            out.writeInt(NP);
            if (NP > 0) {
                for (Map.Entry<String, BatteryStatsImpl.Uid.Pkg> ent
                    : u.mPackageStats.entrySet()) {
                    out.writeString(ent.getKey());
                    Uid.Pkg ps = ent.getValue();
                    final int NWA = ps.mWakeupAlarms.size();
                    out.writeInt(NWA);
                    for (int iwa=0; iwa<NWA; iwa++) {
                        out.writeString(ps.mWakeupAlarms.keyAt(iwa));
                        ps.mWakeupAlarms.valueAt(iwa).writeSummaryFromParcelLocked(out);
                    }
                    NS = ps.mServiceStats.size();
                    out.writeInt(NS);
                    for (int is=0; is<NS; is++) {
                        out.writeString(ps.mServiceStats.keyAt(is));
                        BatteryStatsImpl.Uid.Pkg.Serv ss = ps.mServiceStats.valueAt(is);
                        long time = ss.getStartTimeToNowLocked(
                                mOnBatteryTimeBase.getUptime(NOW_SYS));
                        out.writeLong(time);
                        out.writeInt(ss.mStarts);
                        out.writeInt(ss.mLaunches);
                    }
                }
            }
        }
    }

    public void readFromParcel(Parcel in) {
        readFromParcelLocked(in);
    }

    void readFromParcelLocked(Parcel in) {
        int magic = in.readInt();
        if (magic != MAGIC) {
            throw new ParcelFormatException("Bad magic number: #" + Integer.toHexString(magic));
        }

        readHistory(in, false);

        mStartCount = in.readInt();
        mStartClockTime = in.readLong();
        mStartPlatformVersion = in.readString();
        mEndPlatformVersion = in.readString();
        mUptime = in.readLong();
        mUptimeStart = in.readLong();
        mRealtime = in.readLong();
        mRealtimeStart = in.readLong();
        mOnBattery = in.readInt() != 0;
        mOnBatteryInternal = false; // we are no longer really running.
        mOnBatteryTimeBase.readFromParcel(in);
        mOnBatteryScreenOffTimeBase.readFromParcel(in);

        mScreenState = Display.STATE_UNKNOWN;
        mScreenOnTimer = new StopwatchTimer(null, -1, null, mOnBatteryTimeBase, in);
        for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
            mScreenBrightnessTimer[i] = new StopwatchTimer(null, -100-i, null, mOnBatteryTimeBase,
                    in);
        }
        mInteractive = false;
        mInteractiveTimer = new StopwatchTimer(null, -10, null, mOnBatteryTimeBase, in);
        mPhoneOn = false;
        mPowerSaveModeEnabledTimer = new StopwatchTimer(null, -2, null, mOnBatteryTimeBase, in);
        mLongestLightIdleTime = in.readLong();
        mLongestFullIdleTime = in.readLong();
        mDeviceIdleModeLightTimer = new StopwatchTimer(null, -14, null, mOnBatteryTimeBase, in);
        mDeviceIdleModeFullTimer = new StopwatchTimer(null, -11, null, mOnBatteryTimeBase, in);
        mDeviceLightIdlingTimer = new StopwatchTimer(null, -15, null, mOnBatteryTimeBase, in);
        mDeviceIdlingTimer = new StopwatchTimer(null, -12, null, mOnBatteryTimeBase, in);
        mPhoneOnTimer = new StopwatchTimer(null, -3, null, mOnBatteryTimeBase, in);
        for (int i=0; i<SignalStrength.NUM_SIGNAL_STRENGTH_BINS; i++) {
            mPhoneSignalStrengthsTimer[i] = new StopwatchTimer(null, -200-i,
                    null, mOnBatteryTimeBase, in);
        }
        mPhoneSignalScanningTimer = new StopwatchTimer(null, -200+1, null, mOnBatteryTimeBase, in);
        for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
            mPhoneDataConnectionsTimer[i] = new StopwatchTimer(null, -300-i,
                    null, mOnBatteryTimeBase, in);
        }
        for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
            mNetworkByteActivityCounters[i] = new LongSamplingCounter(mOnBatteryTimeBase, in);
            mNetworkPacketActivityCounters[i] = new LongSamplingCounter(mOnBatteryTimeBase, in);
        }
        mMobileRadioPowerState = DataConnectionRealTimeInfo.DC_POWER_STATE_LOW;
        mMobileRadioActiveTimer = new StopwatchTimer(null, -400, null, mOnBatteryTimeBase, in);
        mMobileRadioActivePerAppTimer = new StopwatchTimer(null, -401, null, mOnBatteryTimeBase,
                in);
        mMobileRadioActiveAdjustedTime = new LongSamplingCounter(mOnBatteryTimeBase, in);
        mMobileRadioActiveUnknownTime = new LongSamplingCounter(mOnBatteryTimeBase, in);
        mMobileRadioActiveUnknownCount = new LongSamplingCounter(mOnBatteryTimeBase, in);
        mWifiRadioPowerState = DataConnectionRealTimeInfo.DC_POWER_STATE_LOW;
        mWifiOn = false;
        mWifiOnTimer = new StopwatchTimer(null, -4, null, mOnBatteryTimeBase, in);
        mGlobalWifiRunning = false;
        mGlobalWifiRunningTimer = new StopwatchTimer(null, -5, null, mOnBatteryTimeBase, in);
        for (int i=0; i<NUM_WIFI_STATES; i++) {
            mWifiStateTimer[i] = new StopwatchTimer(null, -600-i,
                    null, mOnBatteryTimeBase, in);
        }
        for (int i=0; i<NUM_WIFI_SUPPL_STATES; i++) {
            mWifiSupplStateTimer[i] = new StopwatchTimer(null, -700-i,
                    null, mOnBatteryTimeBase, in);
        }
        for (int i=0; i<NUM_WIFI_SIGNAL_STRENGTH_BINS; i++) {
            mWifiSignalStrengthsTimer[i] = new StopwatchTimer(null, -800-i,
                    null, mOnBatteryTimeBase, in);
        }

        mWifiActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                NUM_WIFI_TX_LEVELS, in);
        mBluetoothActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                NUM_BT_TX_LEVELS, in);
        mModemActivity = new ControllerActivityCounterImpl(mOnBatteryTimeBase,
                ModemActivityInfo.TX_POWER_LEVELS, in);
        mHasWifiReporting = in.readInt() != 0;
        mHasBluetoothReporting = in.readInt() != 0;
        mHasModemReporting = in.readInt() != 0;

        mNumConnectivityChange = in.readInt();
        mLoadedNumConnectivityChange = in.readInt();
        mUnpluggedNumConnectivityChange = in.readInt();
        mAudioOnNesting = 0;
        mAudioOnTimer = new StopwatchTimer(null, -7, null, mOnBatteryTimeBase);
        mVideoOnNesting = 0;
        mVideoOnTimer = new StopwatchTimer(null, -8, null, mOnBatteryTimeBase);
        mFlashlightOnNesting = 0;
        mFlashlightOnTimer = new StopwatchTimer(null, -9, null, mOnBatteryTimeBase, in);
        mCameraOnNesting = 0;
        mCameraOnTimer = new StopwatchTimer(null, -13, null, mOnBatteryTimeBase, in);
        mBluetoothScanNesting = 0;
        mBluetoothScanTimer = new StopwatchTimer(null, -14, null, mOnBatteryTimeBase, in);
        mDischargeUnplugLevel = in.readInt();
        mDischargePlugLevel = in.readInt();
        mDischargeCurrentLevel = in.readInt();
        mCurrentBatteryLevel = in.readInt();
        mLowDischargeAmountSinceCharge = in.readInt();
        mHighDischargeAmountSinceCharge = in.readInt();
        mDischargeAmountScreenOn = in.readInt();
        mDischargeAmountScreenOnSinceCharge = in.readInt();
        mDischargeAmountScreenOff = in.readInt();
        mDischargeAmountScreenOffSinceCharge = in.readInt();
        mDischargeStepTracker.readFromParcel(in);
        mChargeStepTracker.readFromParcel(in);
        mLastWriteTime = in.readLong();

        mKernelWakelockStats.clear();
        int NKW = in.readInt();
        for (int ikw = 0; ikw < NKW; ikw++) {
            if (in.readInt() != 0) {
                String wakelockName = in.readString();
                SamplingTimer kwlt = new SamplingTimer(mOnBatteryScreenOffTimeBase, in);
                mKernelWakelockStats.put(wakelockName, kwlt);
            }
        }

        mWakeupReasonStats.clear();
        int NWR = in.readInt();
        for (int iwr = 0; iwr < NWR; iwr++) {
            if (in.readInt() != 0) {
                String reasonName = in.readString();
                SamplingTimer timer = new SamplingTimer(mOnBatteryTimeBase, in);
                mWakeupReasonStats.put(reasonName, timer);
            }
        }

        mPartialTimers.clear();
        mFullTimers.clear();
        mWindowTimers.clear();
        mWifiRunningTimers.clear();
        mFullWifiLockTimers.clear();
        mWifiScanTimers.clear();
        mWifiBatchedScanTimers.clear();
        mWifiMulticastTimers.clear();
        mAudioTurnedOnTimers.clear();
        mVideoTurnedOnTimers.clear();
        mFlashlightTurnedOnTimers.clear();
        mCameraTurnedOnTimers.clear();

        int numUids = in.readInt();
        mUidStats.clear();
        for (int i = 0; i < numUids; i++) {
            int uid = in.readInt();
            Uid u = new Uid(uid);
            u.readFromParcelLocked(mOnBatteryTimeBase, mOnBatteryScreenOffTimeBase, in);
            mUidStats.append(uid, u);
        }
    }

    public void writeToParcel(Parcel out, int flags) {
        writeToParcelLocked(out, true, flags);
    }

    public void writeToParcelWithoutUids(Parcel out, int flags) {
        writeToParcelLocked(out, false, flags);
    }

    @SuppressWarnings("unused")
    void writeToParcelLocked(Parcel out, boolean inclUids, int flags) {
        // Need to update with current kernel wake lock counts.
        pullPendingStateUpdatesLocked();

        // Pull the clock time.  This may update the time and make a new history entry
        // if we had originally pulled a time before the RTC was set.
        long startClockTime = getStartClockTime();

        final long uSecUptime = SystemClock.uptimeMillis() * 1000;
        final long uSecRealtime = SystemClock.elapsedRealtime() * 1000;
        final long batteryRealtime = mOnBatteryTimeBase.getRealtime(uSecRealtime);
        final long batteryScreenOffRealtime = mOnBatteryScreenOffTimeBase.getRealtime(uSecRealtime);

        out.writeInt(MAGIC);

        writeHistory(out, true, false);

        out.writeInt(mStartCount);
        out.writeLong(startClockTime);
        out.writeString(mStartPlatformVersion);
        out.writeString(mEndPlatformVersion);
        out.writeLong(mUptime);
        out.writeLong(mUptimeStart);
        out.writeLong(mRealtime);
        out.writeLong(mRealtimeStart);
        out.writeInt(mOnBattery ? 1 : 0);
        mOnBatteryTimeBase.writeToParcel(out, uSecUptime, uSecRealtime);
        mOnBatteryScreenOffTimeBase.writeToParcel(out, uSecUptime, uSecRealtime);

        mScreenOnTimer.writeToParcel(out, uSecRealtime);
        for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
            mScreenBrightnessTimer[i].writeToParcel(out, uSecRealtime);
        }
        mInteractiveTimer.writeToParcel(out, uSecRealtime);
        mPowerSaveModeEnabledTimer.writeToParcel(out, uSecRealtime);
        out.writeLong(mLongestLightIdleTime);
        out.writeLong(mLongestFullIdleTime);
        mDeviceIdleModeLightTimer.writeToParcel(out, uSecRealtime);
        mDeviceIdleModeFullTimer.writeToParcel(out, uSecRealtime);
        mDeviceLightIdlingTimer.writeToParcel(out, uSecRealtime);
        mDeviceIdlingTimer.writeToParcel(out, uSecRealtime);
        mPhoneOnTimer.writeToParcel(out, uSecRealtime);
        for (int i=0; i<SignalStrength.NUM_SIGNAL_STRENGTH_BINS; i++) {
            mPhoneSignalStrengthsTimer[i].writeToParcel(out, uSecRealtime);
        }
        mPhoneSignalScanningTimer.writeToParcel(out, uSecRealtime);
        for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
            mPhoneDataConnectionsTimer[i].writeToParcel(out, uSecRealtime);
        }
        for (int i = 0; i < NUM_NETWORK_ACTIVITY_TYPES; i++) {
            mNetworkByteActivityCounters[i].writeToParcel(out);
            mNetworkPacketActivityCounters[i].writeToParcel(out);
        }
        mMobileRadioActiveTimer.writeToParcel(out, uSecRealtime);
        mMobileRadioActivePerAppTimer.writeToParcel(out, uSecRealtime);
        mMobileRadioActiveAdjustedTime.writeToParcel(out);
        mMobileRadioActiveUnknownTime.writeToParcel(out);
        mMobileRadioActiveUnknownCount.writeToParcel(out);
        mWifiOnTimer.writeToParcel(out, uSecRealtime);
        mGlobalWifiRunningTimer.writeToParcel(out, uSecRealtime);
        for (int i=0; i<NUM_WIFI_STATES; i++) {
            mWifiStateTimer[i].writeToParcel(out, uSecRealtime);
        }
        for (int i=0; i<NUM_WIFI_SUPPL_STATES; i++) {
            mWifiSupplStateTimer[i].writeToParcel(out, uSecRealtime);
        }
        for (int i=0; i<NUM_WIFI_SIGNAL_STRENGTH_BINS; i++) {
            mWifiSignalStrengthsTimer[i].writeToParcel(out, uSecRealtime);
        }
        mWifiActivity.writeToParcel(out, 0);
        mBluetoothActivity.writeToParcel(out, 0);
        mModemActivity.writeToParcel(out, 0);
        out.writeInt(mHasWifiReporting ? 1 : 0);
        out.writeInt(mHasBluetoothReporting ? 1 : 0);
        out.writeInt(mHasModemReporting ? 1 : 0);

        out.writeInt(mNumConnectivityChange);
        out.writeInt(mLoadedNumConnectivityChange);
        out.writeInt(mUnpluggedNumConnectivityChange);
        mFlashlightOnTimer.writeToParcel(out, uSecRealtime);
        mCameraOnTimer.writeToParcel(out, uSecRealtime);
        mBluetoothScanTimer.writeToParcel(out, uSecRealtime);
        out.writeInt(mDischargeUnplugLevel);
        out.writeInt(mDischargePlugLevel);
        out.writeInt(mDischargeCurrentLevel);
        out.writeInt(mCurrentBatteryLevel);
        out.writeInt(mLowDischargeAmountSinceCharge);
        out.writeInt(mHighDischargeAmountSinceCharge);
        out.writeInt(mDischargeAmountScreenOn);
        out.writeInt(mDischargeAmountScreenOnSinceCharge);
        out.writeInt(mDischargeAmountScreenOff);
        out.writeInt(mDischargeAmountScreenOffSinceCharge);
        mDischargeStepTracker.writeToParcel(out);
        mChargeStepTracker.writeToParcel(out);
        out.writeLong(mLastWriteTime);

        if (inclUids) {
            out.writeInt(mKernelWakelockStats.size());
            for (Map.Entry<String, SamplingTimer> ent : mKernelWakelockStats.entrySet()) {
                SamplingTimer kwlt = ent.getValue();
                if (kwlt != null) {
                    out.writeInt(1);
                    out.writeString(ent.getKey());
                    kwlt.writeToParcel(out, uSecRealtime);
                } else {
                    out.writeInt(0);
                }
            }
            out.writeInt(mWakeupReasonStats.size());
            for (Map.Entry<String, SamplingTimer> ent : mWakeupReasonStats.entrySet()) {
                SamplingTimer timer = ent.getValue();
                if (timer != null) {
                    out.writeInt(1);
                    out.writeString(ent.getKey());
                    timer.writeToParcel(out, uSecRealtime);
                } else {
                    out.writeInt(0);
                }
            }
        } else {
            out.writeInt(0);
        }

        if (inclUids) {
            int size = mUidStats.size();
            out.writeInt(size);
            for (int i = 0; i < size; i++) {
                out.writeInt(mUidStats.keyAt(i));
                Uid uid = mUidStats.valueAt(i);

                uid.writeToParcelLocked(out, uSecRealtime);
            }
        } else {
            out.writeInt(0);
        }
    }

    public static final Parcelable.Creator<BatteryStatsImpl> CREATOR =
        new Parcelable.Creator<BatteryStatsImpl>() {
        public BatteryStatsImpl createFromParcel(Parcel in) {
            return new BatteryStatsImpl(in);
        }

        public BatteryStatsImpl[] newArray(int size) {
            return new BatteryStatsImpl[size];
        }
    };

    public void prepareForDumpLocked() {
        // Need to retrieve current kernel wake lock stats before printing.
        pullPendingStateUpdatesLocked();

        // Pull the clock time.  This may update the time and make a new history entry
        // if we had originally pulled a time before the RTC was set.
        getStartClockTime();
    }

    public void dumpLocked(Context context, PrintWriter pw, int flags, int reqUid, long histStart) {
        if (DEBUG) {
            pw.println("mOnBatteryTimeBase:");
            mOnBatteryTimeBase.dump(pw, "  ");
            pw.println("mOnBatteryScreenOffTimeBase:");
            mOnBatteryScreenOffTimeBase.dump(pw, "  ");
            Printer pr = new PrintWriterPrinter(pw);
            pr.println("*** Screen timer:");
            mScreenOnTimer.logState(pr, "  ");
            for (int i=0; i<NUM_SCREEN_BRIGHTNESS_BINS; i++) {
                pr.println("*** Screen brightness #" + i + ":");
                mScreenBrightnessTimer[i].logState(pr, "  ");
            }
            pr.println("*** Interactive timer:");
            mInteractiveTimer.logState(pr, "  ");
            pr.println("*** Power save mode timer:");
            mPowerSaveModeEnabledTimer.logState(pr, "  ");
            pr.println("*** Device idle mode light timer:");
            mDeviceIdleModeLightTimer.logState(pr, "  ");
            pr.println("*** Device idle mode full timer:");
            mDeviceIdleModeFullTimer.logState(pr, "  ");
            pr.println("*** Device light idling timer:");
            mDeviceLightIdlingTimer.logState(pr, "  ");
            pr.println("*** Device idling timer:");
            mDeviceIdlingTimer.logState(pr, "  ");
            pr.println("*** Phone timer:");
            mPhoneOnTimer.logState(pr, "  ");
            for (int i=0; i<SignalStrength.NUM_SIGNAL_STRENGTH_BINS; i++) {
                pr.println("*** Phone signal strength #" + i + ":");
                mPhoneSignalStrengthsTimer[i].logState(pr, "  ");
            }
            pr.println("*** Signal scanning :");
            mPhoneSignalScanningTimer.logState(pr, "  ");
            for (int i=0; i<NUM_DATA_CONNECTION_TYPES; i++) {
                pr.println("*** Data connection type #" + i + ":");
                mPhoneDataConnectionsTimer[i].logState(pr, "  ");
            }
            pr.println("*** mMobileRadioPowerState=" + mMobileRadioPowerState);
            pr.println("*** Mobile network active timer:");
            mMobileRadioActiveTimer.logState(pr, "  ");
            pr.println("*** Mobile network active adjusted timer:");
            mMobileRadioActiveAdjustedTime.logState(pr, "  ");
            pr.println("*** mWifiRadioPowerState=" + mWifiRadioPowerState);
            pr.println("*** Wifi timer:");
            mWifiOnTimer.logState(pr, "  ");
            pr.println("*** WifiRunning timer:");
            mGlobalWifiRunningTimer.logState(pr, "  ");
            for (int i=0; i<NUM_WIFI_STATES; i++) {
                pr.println("*** Wifi state #" + i + ":");
                mWifiStateTimer[i].logState(pr, "  ");
            }
            for (int i=0; i<NUM_WIFI_SUPPL_STATES; i++) {
                pr.println("*** Wifi suppl state #" + i + ":");
                mWifiSupplStateTimer[i].logState(pr, "  ");
            }
            for (int i=0; i<NUM_WIFI_SIGNAL_STRENGTH_BINS; i++) {
                pr.println("*** Wifi signal strength #" + i + ":");
                mWifiSignalStrengthsTimer[i].logState(pr, "  ");
            }
            pr.println("*** Flashlight timer:");
            mFlashlightOnTimer.logState(pr, "  ");
            pr.println("*** Camera timer:");
            mCameraOnTimer.logState(pr, "  ");
        }
        super.dumpLocked(context, pw, flags, reqUid, histStart);
    }
}