Performance.java revision 8233facddcc51865d612a919d450db6954aa48e3 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.browser;
18
19import android.net.WebAddress;
20import android.os.Debug;
21import android.os.Process;
22import android.os.SystemClock;
23import android.util.Log;
24
25/**
26 * Performance analysis
27 */
28public class Performance {
29
30    private static final String LOGTAG = "browser";
31
32    private final static boolean LOGD_ENABLED =
33            com.android.browser.Browser.LOGD_ENABLED;
34
35    private static boolean mInTrace;
36
37    // Performance probe
38    private static final int[] SYSTEM_CPU_FORMAT = new int[] {
39            Process.PROC_SPACE_TERM | Process.PROC_COMBINE,
40            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 1: user time
41            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 2: nice time
42            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 3: sys time
43            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 4: idle time
44            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 5: iowait time
45            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG, // 6: irq time
46            Process.PROC_SPACE_TERM | Process.PROC_OUT_LONG  // 7: softirq time
47    };
48
49    private static long mStart;
50    private static long mProcessStart;
51    private static long mUserStart;
52    private static long mSystemStart;
53    private static long mIdleStart;
54    private static long mIrqStart;
55
56    private static long mUiStart;
57
58    static void tracePageStart(String url) {
59        if (BrowserSettings.getInstance().isTracing()) {
60            String host;
61            try {
62                WebAddress uri = new WebAddress(url);
63                host = uri.getHost();
64            } catch (android.net.ParseException ex) {
65                host = "browser";
66            }
67            host = host.replace('.', '_');
68            host += ".trace";
69            mInTrace = true;
70            Debug.startMethodTracing(host, 20 * 1024 * 1024);
71        }
72    }
73
74    static void tracePageFinished() {
75        if (mInTrace) {
76            mInTrace = false;
77            Debug.stopMethodTracing();
78        }
79    }
80
81    static void onPageStarted() {
82        mStart = SystemClock.uptimeMillis();
83        mProcessStart = Process.getElapsedCpuTime();
84        long[] sysCpu = new long[7];
85        if (Process.readProcFile("/proc/stat", SYSTEM_CPU_FORMAT, null, sysCpu, null)) {
86            mUserStart = sysCpu[0] + sysCpu[1];
87            mSystemStart = sysCpu[2];
88            mIdleStart = sysCpu[3];
89            mIrqStart = sysCpu[4] + sysCpu[5] + sysCpu[6];
90        }
91        mUiStart = SystemClock.currentThreadTimeMillis();
92    }
93
94    static void onPageFinished(String url) {
95        long[] sysCpu = new long[7];
96        if (Process.readProcFile("/proc/stat", SYSTEM_CPU_FORMAT, null, sysCpu, null)) {
97            String uiInfo =
98                    "UI thread used " + (SystemClock.currentThreadTimeMillis() - mUiStart) + " ms";
99            if (LOGD_ENABLED) {
100                Log.d(LOGTAG, uiInfo);
101            }
102            // The string that gets written to the log
103            String performanceString =
104                    "It took total " + (SystemClock.uptimeMillis() - mStart)
105                            + " ms clock time to load the page." + "\nbrowser process used "
106                            + (Process.getElapsedCpuTime() - mProcessStart)
107                            + " ms, user processes used " + (sysCpu[0] + sysCpu[1] - mUserStart)
108                            * 10 + " ms, kernel used " + (sysCpu[2] - mSystemStart) * 10
109                            + " ms, idle took " + (sysCpu[3] - mIdleStart) * 10
110                            + " ms and irq took " + (sysCpu[4] + sysCpu[5] + sysCpu[6] - mIrqStart)
111                            * 10 + " ms, " + uiInfo;
112            if (LOGD_ENABLED) {
113                Log.d(LOGTAG, performanceString + "\nWebpage: " + url);
114            }
115            if (url != null) {
116                // strip the url to maintain consistency
117                String newUrl = new String(url);
118                if (newUrl.startsWith("http://www.")) {
119                    newUrl = newUrl.substring(11);
120                } else if (newUrl.startsWith("http://")) {
121                    newUrl = newUrl.substring(7);
122                } else if (newUrl.startsWith("https://www.")) {
123                    newUrl = newUrl.substring(12);
124                } else if (newUrl.startsWith("https://")) {
125                    newUrl = newUrl.substring(8);
126                }
127                if (LOGD_ENABLED) {
128                    Log.d(LOGTAG, newUrl + " loaded");
129                }
130            }
131        }
132    }
133}
134