ProcessList.java revision 148d7f4291d675fc17852d530be32b7dba06fc93
1/* 2 * Copyright (C) 2011 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.server.am; 18 19import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM; 20import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME; 21 22import java.io.IOException; 23import java.io.OutputStream; 24import java.nio.ByteBuffer; 25 26import android.app.ActivityManager; 27import android.app.ActivityManagerProto; 28import android.os.Build; 29import android.os.SystemClock; 30import com.android.internal.util.MemInfoReader; 31import com.android.server.wm.WindowManagerService; 32 33import android.content.res.Resources; 34import android.graphics.Point; 35import android.os.SystemProperties; 36import android.net.LocalSocketAddress; 37import android.net.LocalSocket; 38import android.util.Slog; 39import android.view.Display; 40 41/** 42 * Activity manager code dealing with processes. 43 */ 44public final class ProcessList { 45 private static final String TAG = TAG_WITH_CLASS_NAME ? "ProcessList" : TAG_AM; 46 47 // The minimum time we allow between crashes, for us to consider this 48 // application to be bad and stop and its services and reject broadcasts. 49 static final int MIN_CRASH_INTERVAL = 60*1000; 50 51 // OOM adjustments for processes in various states: 52 53 // Uninitialized value for any major or minor adj fields 54 static final int INVALID_ADJ = -10000; 55 56 // Adjustment used in certain places where we don't know it yet. 57 // (Generally this is something that is going to be cached, but we 58 // don't know the exact value in the cached range to assign yet.) 59 static final int UNKNOWN_ADJ = 1001; 60 61 // This is a process only hosting activities that are not visible, 62 // so it can be killed without any disruption. 63 static final int CACHED_APP_MAX_ADJ = 906; 64 static final int CACHED_APP_MIN_ADJ = 900; 65 66 // The B list of SERVICE_ADJ -- these are the old and decrepit 67 // services that aren't as shiny and interesting as the ones in the A list. 68 static final int SERVICE_B_ADJ = 800; 69 70 // This is the process of the previous application that the user was in. 71 // This process is kept above other things, because it is very common to 72 // switch back to the previous app. This is important both for recent 73 // task switch (toggling between the two top recent apps) as well as normal 74 // UI flow such as clicking on a URI in the e-mail app to view in the browser, 75 // and then pressing back to return to e-mail. 76 static final int PREVIOUS_APP_ADJ = 700; 77 78 // This is a process holding the home application -- we want to try 79 // avoiding killing it, even if it would normally be in the background, 80 // because the user interacts with it so much. 81 static final int HOME_APP_ADJ = 600; 82 83 // This is a process holding an application service -- killing it will not 84 // have much of an impact as far as the user is concerned. 85 static final int SERVICE_ADJ = 500; 86 87 // This is a process with a heavy-weight application. It is in the 88 // background, but we want to try to avoid killing it. Value set in 89 // system/rootdir/init.rc on startup. 90 static final int HEAVY_WEIGHT_APP_ADJ = 400; 91 92 // This is a process currently hosting a backup operation. Killing it 93 // is not entirely fatal but is generally a bad idea. 94 static final int BACKUP_APP_ADJ = 300; 95 96 // This is a process only hosting components that are perceptible to the 97 // user, and we really want to avoid killing them, but they are not 98 // immediately visible. An example is background music playback. 99 static final int PERCEPTIBLE_APP_ADJ = 200; 100 101 // This is a process only hosting activities that are visible to the 102 // user, so we'd prefer they don't disappear. 103 static final int VISIBLE_APP_ADJ = 100; 104 static final int VISIBLE_APP_LAYER_MAX = PERCEPTIBLE_APP_ADJ - VISIBLE_APP_ADJ - 1; 105 106 // This is the process running the current foreground app. We'd really 107 // rather not kill it! 108 static final int FOREGROUND_APP_ADJ = 0; 109 110 // This is a process that the system or a persistent process has bound to, 111 // and indicated it is important. 112 static final int PERSISTENT_SERVICE_ADJ = -700; 113 114 // This is a system persistent process, such as telephony. Definitely 115 // don't want to kill it, but doing so is not completely fatal. 116 static final int PERSISTENT_PROC_ADJ = -800; 117 118 // The system process runs at the default adjustment. 119 static final int SYSTEM_ADJ = -900; 120 121 // Special code for native processes that are not being managed by the system (so 122 // don't have an oom adj assigned by the system). 123 static final int NATIVE_ADJ = -1000; 124 125 // Memory pages are 4K. 126 static final int PAGE_SIZE = 4*1024; 127 128 // Activity manager's version of Process.THREAD_GROUP_BG_NONINTERACTIVE 129 static final int SCHED_GROUP_BACKGROUND = 0; 130 // Activity manager's version of Process.THREAD_GROUP_DEFAULT 131 static final int SCHED_GROUP_DEFAULT = 1; 132 // Activity manager's version of Process.THREAD_GROUP_TOP_APP 133 static final int SCHED_GROUP_TOP_APP = 2; 134 // Activity manager's version of Process.THREAD_GROUP_TOP_APP 135 // Disambiguate between actual top app and processes bound to the top app 136 static final int SCHED_GROUP_TOP_APP_BOUND = 3; 137 138 // The minimum number of cached apps we want to be able to keep around, 139 // without empty apps being able to push them out of memory. 140 static final int MIN_CACHED_APPS = 2; 141 142 // We allow empty processes to stick around for at most 30 minutes. 143 static final long MAX_EMPTY_TIME = 30*60*1000; 144 145 // Threshold of number of cached+empty where we consider memory critical. 146 static final int TRIM_CRITICAL_THRESHOLD = 3; 147 148 // Threshold of number of cached+empty where we consider memory critical. 149 static final int TRIM_LOW_THRESHOLD = 5; 150 151 // Low Memory Killer Daemon command codes. 152 // These must be kept in sync with the definitions in lmkd.c 153 // 154 // LMK_TARGET <minfree> <minkillprio> ... (up to 6 pairs) 155 // LMK_PROCPRIO <pid> <uid> <prio> 156 // LMK_PROCREMOVE <pid> 157 static final byte LMK_TARGET = 0; 158 static final byte LMK_PROCPRIO = 1; 159 static final byte LMK_PROCREMOVE = 2; 160 161 // These are the various interesting memory levels that we will give to 162 // the OOM killer. Note that the OOM killer only supports 6 slots, so we 163 // can't give it a different value for every possible kind of process. 164 private final int[] mOomAdj = new int[] { 165 FOREGROUND_APP_ADJ, VISIBLE_APP_ADJ, PERCEPTIBLE_APP_ADJ, 166 BACKUP_APP_ADJ, CACHED_APP_MIN_ADJ, CACHED_APP_MAX_ADJ 167 }; 168 // These are the low-end OOM level limits. This is appropriate for an 169 // HVGA or smaller phone with less than 512MB. Values are in KB. 170 private final int[] mOomMinFreeLow = new int[] { 171 12288, 18432, 24576, 172 36864, 43008, 49152 173 }; 174 // These are the high-end OOM level limits. This is appropriate for a 175 // 1280x800 or larger screen with around 1GB RAM. Values are in KB. 176 private final int[] mOomMinFreeHigh = new int[] { 177 73728, 92160, 110592, 178 129024, 147456, 184320 179 }; 180 // The actual OOM killer memory levels we are using. 181 private final int[] mOomMinFree = new int[mOomAdj.length]; 182 183 private final long mTotalMemMb; 184 185 private long mCachedRestoreLevel; 186 187 private boolean mHaveDisplaySize; 188 189 private static LocalSocket sLmkdSocket; 190 private static OutputStream sLmkdOutputStream; 191 192 ProcessList() { 193 MemInfoReader minfo = new MemInfoReader(); 194 minfo.readMemInfo(); 195 mTotalMemMb = minfo.getTotalSize()/(1024*1024); 196 updateOomLevels(0, 0, false); 197 } 198 199 void applyDisplaySize(WindowManagerService wm) { 200 if (!mHaveDisplaySize) { 201 Point p = new Point(); 202 // TODO(multi-display): Compute based on sum of all connected displays' resolutions. 203 wm.getBaseDisplaySize(Display.DEFAULT_DISPLAY, p); 204 if (p.x != 0 && p.y != 0) { 205 updateOomLevels(p.x, p.y, true); 206 mHaveDisplaySize = true; 207 } 208 } 209 } 210 211 private void updateOomLevels(int displayWidth, int displayHeight, boolean write) { 212 // Scale buckets from avail memory: at 300MB we use the lowest values to 213 // 700MB or more for the top values. 214 float scaleMem = ((float)(mTotalMemMb-350))/(700-350); 215 216 // Scale buckets from screen size. 217 int minSize = 480*800; // 384000 218 int maxSize = 1280*800; // 1024000 230400 870400 .264 219 float scaleDisp = ((float)(displayWidth*displayHeight)-minSize)/(maxSize-minSize); 220 if (false) { 221 Slog.i("XXXXXX", "scaleMem=" + scaleMem); 222 Slog.i("XXXXXX", "scaleDisp=" + scaleDisp + " dw=" + displayWidth 223 + " dh=" + displayHeight); 224 } 225 226 float scale = scaleMem > scaleDisp ? scaleMem : scaleDisp; 227 if (scale < 0) scale = 0; 228 else if (scale > 1) scale = 1; 229 int minfree_adj = Resources.getSystem().getInteger( 230 com.android.internal.R.integer.config_lowMemoryKillerMinFreeKbytesAdjust); 231 int minfree_abs = Resources.getSystem().getInteger( 232 com.android.internal.R.integer.config_lowMemoryKillerMinFreeKbytesAbsolute); 233 if (false) { 234 Slog.i("XXXXXX", "minfree_adj=" + minfree_adj + " minfree_abs=" + minfree_abs); 235 } 236 237 final boolean is64bit = Build.SUPPORTED_64_BIT_ABIS.length > 0; 238 239 for (int i=0; i<mOomAdj.length; i++) { 240 int low = mOomMinFreeLow[i]; 241 int high = mOomMinFreeHigh[i]; 242 if (is64bit) { 243 // Increase the high min-free levels for cached processes for 64-bit 244 if (i == 4) high = (high*3)/2; 245 else if (i == 5) high = (high*7)/4; 246 } 247 mOomMinFree[i] = (int)(low + ((high-low)*scale)); 248 } 249 250 if (minfree_abs >= 0) { 251 for (int i=0; i<mOomAdj.length; i++) { 252 mOomMinFree[i] = (int)((float)minfree_abs * mOomMinFree[i] 253 / mOomMinFree[mOomAdj.length - 1]); 254 } 255 } 256 257 if (minfree_adj != 0) { 258 for (int i=0; i<mOomAdj.length; i++) { 259 mOomMinFree[i] += (int)((float)minfree_adj * mOomMinFree[i] 260 / mOomMinFree[mOomAdj.length - 1]); 261 if (mOomMinFree[i] < 0) { 262 mOomMinFree[i] = 0; 263 } 264 } 265 } 266 267 // The maximum size we will restore a process from cached to background, when under 268 // memory duress, is 1/3 the size we have reserved for kernel caches and other overhead 269 // before killing background processes. 270 mCachedRestoreLevel = (getMemLevel(ProcessList.CACHED_APP_MAX_ADJ)/1024) / 3; 271 272 // Ask the kernel to try to keep enough memory free to allocate 3 full 273 // screen 32bpp buffers without entering direct reclaim. 274 int reserve = displayWidth * displayHeight * 4 * 3 / 1024; 275 int reserve_adj = Resources.getSystem().getInteger(com.android.internal.R.integer.config_extraFreeKbytesAdjust); 276 int reserve_abs = Resources.getSystem().getInteger(com.android.internal.R.integer.config_extraFreeKbytesAbsolute); 277 278 if (reserve_abs >= 0) { 279 reserve = reserve_abs; 280 } 281 282 if (reserve_adj != 0) { 283 reserve += reserve_adj; 284 if (reserve < 0) { 285 reserve = 0; 286 } 287 } 288 289 if (write) { 290 ByteBuffer buf = ByteBuffer.allocate(4 * (2*mOomAdj.length + 1)); 291 buf.putInt(LMK_TARGET); 292 for (int i=0; i<mOomAdj.length; i++) { 293 buf.putInt((mOomMinFree[i]*1024)/PAGE_SIZE); 294 buf.putInt(mOomAdj[i]); 295 } 296 297 writeLmkd(buf); 298 SystemProperties.set("sys.sysctl.extra_free_kbytes", Integer.toString(reserve)); 299 } 300 // GB: 2048,3072,4096,6144,7168,8192 301 // HC: 8192,10240,12288,14336,16384,20480 302 } 303 304 public static int computeEmptyProcessLimit(int totalProcessLimit) { 305 return totalProcessLimit/2; 306 } 307 308 private static String buildOomTag(String prefix, String space, int val, int base) { 309 if (val == base) { 310 if (space == null) return prefix; 311 return prefix + " "; 312 } 313 return prefix + "+" + Integer.toString(val-base); 314 } 315 316 public static String makeOomAdjString(int setAdj) { 317 if (setAdj >= ProcessList.CACHED_APP_MIN_ADJ) { 318 return buildOomTag("cch", " ", setAdj, ProcessList.CACHED_APP_MIN_ADJ); 319 } else if (setAdj >= ProcessList.SERVICE_B_ADJ) { 320 return buildOomTag("svcb ", null, setAdj, ProcessList.SERVICE_B_ADJ); 321 } else if (setAdj >= ProcessList.PREVIOUS_APP_ADJ) { 322 return buildOomTag("prev ", null, setAdj, ProcessList.PREVIOUS_APP_ADJ); 323 } else if (setAdj >= ProcessList.HOME_APP_ADJ) { 324 return buildOomTag("home ", null, setAdj, ProcessList.HOME_APP_ADJ); 325 } else if (setAdj >= ProcessList.SERVICE_ADJ) { 326 return buildOomTag("svc ", null, setAdj, ProcessList.SERVICE_ADJ); 327 } else if (setAdj >= ProcessList.HEAVY_WEIGHT_APP_ADJ) { 328 return buildOomTag("hvy ", null, setAdj, ProcessList.HEAVY_WEIGHT_APP_ADJ); 329 } else if (setAdj >= ProcessList.BACKUP_APP_ADJ) { 330 return buildOomTag("bkup ", null, setAdj, ProcessList.BACKUP_APP_ADJ); 331 } else if (setAdj >= ProcessList.PERCEPTIBLE_APP_ADJ) { 332 return buildOomTag("prcp ", null, setAdj, ProcessList.PERCEPTIBLE_APP_ADJ); 333 } else if (setAdj >= ProcessList.VISIBLE_APP_ADJ) { 334 return buildOomTag("vis ", null, setAdj, ProcessList.VISIBLE_APP_ADJ); 335 } else if (setAdj >= ProcessList.FOREGROUND_APP_ADJ) { 336 return buildOomTag("fore ", null, setAdj, ProcessList.FOREGROUND_APP_ADJ); 337 } else if (setAdj >= ProcessList.PERSISTENT_SERVICE_ADJ) { 338 return buildOomTag("psvc ", null, setAdj, ProcessList.PERSISTENT_SERVICE_ADJ); 339 } else if (setAdj >= ProcessList.PERSISTENT_PROC_ADJ) { 340 return buildOomTag("pers ", null, setAdj, ProcessList.PERSISTENT_PROC_ADJ); 341 } else if (setAdj >= ProcessList.SYSTEM_ADJ) { 342 return buildOomTag("sys ", null, setAdj, ProcessList.SYSTEM_ADJ); 343 } else if (setAdj >= ProcessList.NATIVE_ADJ) { 344 return buildOomTag("ntv ", null, setAdj, ProcessList.NATIVE_ADJ); 345 } else { 346 return Integer.toString(setAdj); 347 } 348 } 349 350 public static String makeProcStateString(int curProcState) { 351 String procState; 352 switch (curProcState) { 353 case ActivityManager.PROCESS_STATE_PERSISTENT: 354 procState = "PER "; 355 break; 356 case ActivityManager.PROCESS_STATE_PERSISTENT_UI: 357 procState = "PERU"; 358 break; 359 case ActivityManager.PROCESS_STATE_TOP: 360 procState = "TOP "; 361 break; 362 case ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE: 363 procState = "FGS "; 364 break; 365 case ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE: 366 procState = "BFGS"; 367 break; 368 case ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND: 369 procState = "IMPF"; 370 break; 371 case ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND: 372 procState = "IMPB"; 373 break; 374 case ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND: 375 procState = "TRNB"; 376 break; 377 case ActivityManager.PROCESS_STATE_BACKUP: 378 procState = "BKUP"; 379 break; 380 case ActivityManager.PROCESS_STATE_SERVICE: 381 procState = "SVC "; 382 break; 383 case ActivityManager.PROCESS_STATE_RECEIVER: 384 procState = "RCVR"; 385 break; 386 case ActivityManager.PROCESS_STATE_TOP_SLEEPING: 387 procState = "TPSL"; 388 break; 389 case ActivityManager.PROCESS_STATE_HEAVY_WEIGHT: 390 procState = "HVY "; 391 break; 392 case ActivityManager.PROCESS_STATE_HOME: 393 procState = "HOME"; 394 break; 395 case ActivityManager.PROCESS_STATE_LAST_ACTIVITY: 396 procState = "LAST"; 397 break; 398 case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY: 399 procState = "CAC "; 400 break; 401 case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT: 402 procState = "CACC"; 403 break; 404 case ActivityManager.PROCESS_STATE_CACHED_RECENT: 405 procState = "CRE "; 406 break; 407 case ActivityManager.PROCESS_STATE_CACHED_EMPTY: 408 procState = "CEM "; 409 break; 410 case ActivityManager.PROCESS_STATE_NONEXISTENT: 411 procState = "NONE"; 412 break; 413 default: 414 procState = "??"; 415 break; 416 } 417 return procState; 418 } 419 420 public static int makeProcStateProtoEnum(int curProcState) { 421 switch (curProcState) { 422 case ActivityManager.PROCESS_STATE_PERSISTENT: 423 return ActivityManagerProto.PROCESS_STATE_PERSISTENT; 424 case ActivityManager.PROCESS_STATE_PERSISTENT_UI: 425 return ActivityManagerProto.PROCESS_STATE_PERSISTENT_UI; 426 case ActivityManager.PROCESS_STATE_TOP: 427 return ActivityManagerProto.PROCESS_STATE_TOP; 428 case ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE: 429 return ActivityManagerProto.PROCESS_STATE_BOUND_FOREGROUND_SERVICE; 430 case ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE: 431 return ActivityManagerProto.PROCESS_STATE_FOREGROUND_SERVICE; 432 case ActivityManager.PROCESS_STATE_TOP_SLEEPING: 433 return ActivityManagerProto.PROCESS_STATE_TOP_SLEEPING; 434 case ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND: 435 return ActivityManagerProto.PROCESS_STATE_IMPORTANT_FOREGROUND; 436 case ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND: 437 return ActivityManagerProto.PROCESS_STATE_IMPORTANT_BACKGROUND; 438 case ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND: 439 return ActivityManagerProto.PROCESS_STATE_TRANSIENT_BACKGROUND; 440 case ActivityManager.PROCESS_STATE_BACKUP: 441 return ActivityManagerProto.PROCESS_STATE_BACKUP; 442 case ActivityManager.PROCESS_STATE_HEAVY_WEIGHT: 443 return ActivityManagerProto.PROCESS_STATE_HEAVY_WEIGHT; 444 case ActivityManager.PROCESS_STATE_SERVICE: 445 return ActivityManagerProto.PROCESS_STATE_SERVICE; 446 case ActivityManager.PROCESS_STATE_RECEIVER: 447 return ActivityManagerProto.PROCESS_STATE_RECEIVER; 448 case ActivityManager.PROCESS_STATE_HOME: 449 return ActivityManagerProto.PROCESS_STATE_HOME; 450 case ActivityManager.PROCESS_STATE_LAST_ACTIVITY: 451 return ActivityManagerProto.PROCESS_STATE_LAST_ACTIVITY; 452 case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY: 453 return ActivityManagerProto.PROCESS_STATE_CACHED_ACTIVITY; 454 case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT: 455 return ActivityManagerProto.PROCESS_STATE_CACHED_ACTIVITY_CLIENT; 456 case ActivityManager.PROCESS_STATE_CACHED_RECENT: 457 return ActivityManagerProto.PROCESS_STATE_CACHED_RECENT; 458 case ActivityManager.PROCESS_STATE_CACHED_EMPTY: 459 return ActivityManagerProto.PROCESS_STATE_CACHED_EMPTY; 460 case ActivityManager.PROCESS_STATE_NONEXISTENT: 461 return ActivityManagerProto.PROCESS_STATE_NONEXISTENT; 462 default: 463 return -1; 464 } 465 } 466 467 public static void appendRamKb(StringBuilder sb, long ramKb) { 468 for (int j=0, fact=10; j<6; j++, fact*=10) { 469 if (ramKb < fact) { 470 sb.append(' '); 471 } 472 } 473 sb.append(ramKb); 474 } 475 476 // How long after a state change that it is safe to collect PSS without it being dirty. 477 public static final int PSS_SAFE_TIME_FROM_STATE_CHANGE = 1000; 478 479 // The minimum time interval after a state change it is safe to collect PSS. 480 public static final int PSS_MIN_TIME_FROM_STATE_CHANGE = 15*1000; 481 482 // The maximum amount of time we want to go between PSS collections. 483 public static final int PSS_MAX_INTERVAL = 40*60*1000; 484 485 // The minimum amount of time between successive PSS requests for *all* processes. 486 public static final int PSS_ALL_INTERVAL = 20*60*1000; 487 488 // The amount of time until PSS when a persistent process first appears. 489 private static final int PSS_FIRST_PERSISTENT_INTERVAL = 30*1000; 490 491 // The amount of time until PSS when a process first becomes top. 492 private static final int PSS_FIRST_TOP_INTERVAL = 10*1000; 493 494 // The amount of time until PSS when a process first goes into the background. 495 private static final int PSS_FIRST_BACKGROUND_INTERVAL = 20*1000; 496 497 // The amount of time until PSS when a process first becomes cached. 498 private static final int PSS_FIRST_CACHED_INTERVAL = 30*1000; 499 500 // The amount of time until PSS when the top process stays in the same state. 501 private static final int PSS_SAME_TOP_INTERVAL = 5*60*1000; 502 503 // The amount of time until PSS when an important process stays in the same state. 504 private static final int PSS_SAME_IMPORTANT_INTERVAL = 15*60*1000; 505 506 // The amount of time until PSS when a service process stays in the same state. 507 private static final int PSS_SAME_SERVICE_INTERVAL = 20*60*1000; 508 509 // The amount of time until PSS when a cached process stays in the same state. 510 private static final int PSS_SAME_CACHED_INTERVAL = 30*60*1000; 511 512 // The amount of time until PSS when a persistent process first appears. 513 private static final int PSS_FIRST_ASLEEP_PERSISTENT_INTERVAL = 1*60*1000; 514 515 // The amount of time until PSS when a process first becomes top. 516 private static final int PSS_FIRST_ASLEEP_TOP_INTERVAL = 20*1000; 517 518 // The amount of time until PSS when a process first goes into the background. 519 private static final int PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL = 30*1000; 520 521 // The amount of time until PSS when a process first becomes cached. 522 private static final int PSS_FIRST_ASLEEP_CACHED_INTERVAL = 1*60*1000; 523 524 // The minimum time interval after a state change it is safe to collect PSS. 525 public static final int PSS_TEST_MIN_TIME_FROM_STATE_CHANGE = 10*1000; 526 527 // The amount of time during testing until PSS when a process first becomes top. 528 private static final int PSS_TEST_FIRST_TOP_INTERVAL = 3*1000; 529 530 // The amount of time during testing until PSS when a process first goes into the background. 531 private static final int PSS_TEST_FIRST_BACKGROUND_INTERVAL = 5*1000; 532 533 // The amount of time during testing until PSS when an important process stays in same state. 534 private static final int PSS_TEST_SAME_IMPORTANT_INTERVAL = 10*1000; 535 536 // The amount of time during testing until PSS when a background process stays in same state. 537 private static final int PSS_TEST_SAME_BACKGROUND_INTERVAL = 15*1000; 538 539 public static final int PROC_MEM_PERSISTENT = 0; 540 public static final int PROC_MEM_TOP = 1; 541 public static final int PROC_MEM_IMPORTANT = 2; 542 public static final int PROC_MEM_SERVICE = 3; 543 public static final int PROC_MEM_CACHED = 4; 544 545 private static final int[] sProcStateToProcMem = new int[] { 546 PROC_MEM_PERSISTENT, // ActivityManager.PROCESS_STATE_PERSISTENT 547 PROC_MEM_PERSISTENT, // ActivityManager.PROCESS_STATE_PERSISTENT_UI 548 PROC_MEM_TOP, // ActivityManager.PROCESS_STATE_TOP 549 PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE 550 PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE 551 PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND 552 PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND 553 PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND 554 PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_BACKUP 555 PROC_MEM_SERVICE, // ActivityManager.PROCESS_STATE_SERVICE 556 PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_RECEIVER 557 PROC_MEM_TOP, // ActivityManager.PROCESS_STATE_TOP_SLEEPING 558 PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT 559 PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_HOME 560 PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY 561 PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY 562 PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT 563 PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_RECENT 564 PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_EMPTY 565 }; 566 567 private static final long[] sFirstAwakePssTimes = new long[] { 568 PSS_FIRST_PERSISTENT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT 569 PSS_FIRST_PERSISTENT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI 570 PSS_FIRST_TOP_INTERVAL, // ActivityManager.PROCESS_STATE_TOP 571 PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE 572 PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE 573 PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND 574 PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND 575 PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND 576 PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP 577 PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE 578 PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER 579 PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_TOP_SLEEPING 580 PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT 581 PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HOME 582 PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY 583 PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY 584 PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT 585 PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_RECENT 586 PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY 587 }; 588 589 private static final long[] sSameAwakePssTimes = new long[] { 590 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT 591 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI 592 PSS_SAME_TOP_INTERVAL, // ActivityManager.PROCESS_STATE_TOP 593 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE 594 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE 595 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND 596 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND 597 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND 598 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP 599 PSS_SAME_SERVICE_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE 600 PSS_SAME_SERVICE_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER 601 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_TOP_SLEEPING 602 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT 603 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HOME 604 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY 605 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY 606 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT 607 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_RECENT 608 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY 609 }; 610 611 private static final long[] sFirstAsleepPssTimes = new long[] { 612 PSS_FIRST_ASLEEP_PERSISTENT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT 613 PSS_FIRST_ASLEEP_PERSISTENT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI 614 PSS_FIRST_ASLEEP_TOP_INTERVAL, // ActivityManager.PROCESS_STATE_TOP 615 PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE 616 PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE 617 PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND 618 PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND 619 PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND 620 PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP 621 PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE 622 PSS_FIRST_ASLEEP_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER 623 PSS_FIRST_ASLEEP_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_TOP_SLEEPING 624 PSS_FIRST_ASLEEP_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT 625 PSS_FIRST_ASLEEP_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HOME 626 PSS_FIRST_ASLEEP_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY 627 PSS_FIRST_ASLEEP_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY 628 PSS_FIRST_ASLEEP_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT 629 PSS_FIRST_ASLEEP_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_RECENT 630 PSS_FIRST_ASLEEP_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY 631 }; 632 633 private static final long[] sSameAsleepPssTimes = new long[] { 634 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT 635 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI 636 PSS_SAME_TOP_INTERVAL, // ActivityManager.PROCESS_STATE_TOP 637 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE 638 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE 639 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE 640 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND 641 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND 642 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND 643 PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP 644 PSS_SAME_SERVICE_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE 645 PSS_SAME_SERVICE_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER 646 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_TOP_SLEEPING 647 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT 648 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HOME 649 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY 650 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY 651 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT 652 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_RECENT 653 PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY 654 }; 655 656 private static final long[] sTestFirstPssTimes = new long[] { 657 PSS_TEST_FIRST_TOP_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT 658 PSS_TEST_FIRST_TOP_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI 659 PSS_TEST_FIRST_TOP_INTERVAL, // ActivityManager.PROCESS_STATE_TOP 660 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE 661 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE 662 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND 663 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND 664 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND 665 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP 666 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE 667 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER 668 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_TOP_SLEEPING 669 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT 670 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_HOME 671 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY 672 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY 673 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT 674 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_RECENT 675 PSS_TEST_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY 676 }; 677 678 private static final long[] sTestSamePssTimes = new long[] { 679 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT 680 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI 681 PSS_TEST_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_TOP 682 PSS_TEST_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE 683 PSS_TEST_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE 684 PSS_TEST_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND 685 PSS_TEST_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND 686 PSS_TEST_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND 687 PSS_TEST_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP 688 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE 689 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER 690 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_TOP_SLEEPING 691 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT 692 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_HOME 693 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY 694 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY 695 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT 696 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_RECENT 697 PSS_TEST_SAME_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY 698 }; 699 700 public static boolean procStatesDifferForMem(int procState1, int procState2) { 701 return sProcStateToProcMem[procState1] != sProcStateToProcMem[procState2]; 702 } 703 704 public static long minTimeFromStateChange(boolean test) { 705 return test ? PSS_TEST_MIN_TIME_FROM_STATE_CHANGE : PSS_MIN_TIME_FROM_STATE_CHANGE; 706 } 707 708 public static long computeNextPssTime(int procState, boolean first, boolean test, 709 boolean sleeping, long now) { 710 final long[] table = test 711 ? (first 712 ? sTestFirstPssTimes 713 : sTestSamePssTimes) 714 : (first 715 ? (sleeping ? sFirstAsleepPssTimes : sFirstAwakePssTimes) 716 : (sleeping ? sSameAsleepPssTimes : sSameAwakePssTimes)); 717 return now + table[procState]; 718 } 719 720 long getMemLevel(int adjustment) { 721 for (int i=0; i<mOomAdj.length; i++) { 722 if (adjustment <= mOomAdj[i]) { 723 return mOomMinFree[i] * 1024; 724 } 725 } 726 return mOomMinFree[mOomAdj.length-1] * 1024; 727 } 728 729 /** 730 * Return the maximum pss size in kb that we consider a process acceptable to 731 * restore from its cached state for running in the background when RAM is low. 732 */ 733 long getCachedRestoreThresholdKb() { 734 return mCachedRestoreLevel; 735 } 736 737 /** 738 * Set the out-of-memory badness adjustment for a process. 739 * If {@code pid <= 0}, this method will be a no-op. 740 * 741 * @param pid The process identifier to set. 742 * @param uid The uid of the app 743 * @param amt Adjustment value -- lmkd allows -16 to +15. 744 * 745 * {@hide} 746 */ 747 public static final void setOomAdj(int pid, int uid, int amt) { 748 // This indicates that the process is not started yet and so no need to proceed further. 749 if (pid <= 0) { 750 return; 751 } 752 if (amt == UNKNOWN_ADJ) 753 return; 754 755 long start = SystemClock.elapsedRealtime(); 756 ByteBuffer buf = ByteBuffer.allocate(4 * 4); 757 buf.putInt(LMK_PROCPRIO); 758 buf.putInt(pid); 759 buf.putInt(uid); 760 buf.putInt(amt); 761 writeLmkd(buf); 762 long now = SystemClock.elapsedRealtime(); 763 if ((now-start) > 250) { 764 Slog.w("ActivityManager", "SLOW OOM ADJ: " + (now-start) + "ms for pid " + pid 765 + " = " + amt); 766 } 767 } 768 769 /* 770 * {@hide} 771 */ 772 public static final void remove(int pid) { 773 // This indicates that the process is not started yet and so no need to proceed further. 774 if (pid <= 0) { 775 return; 776 } 777 ByteBuffer buf = ByteBuffer.allocate(4 * 2); 778 buf.putInt(LMK_PROCREMOVE); 779 buf.putInt(pid); 780 writeLmkd(buf); 781 } 782 783 private static boolean openLmkdSocket() { 784 try { 785 sLmkdSocket = new LocalSocket(LocalSocket.SOCKET_SEQPACKET); 786 sLmkdSocket.connect( 787 new LocalSocketAddress("lmkd", 788 LocalSocketAddress.Namespace.RESERVED)); 789 sLmkdOutputStream = sLmkdSocket.getOutputStream(); 790 } catch (IOException ex) { 791 Slog.w(TAG, "lowmemorykiller daemon socket open failed"); 792 sLmkdSocket = null; 793 return false; 794 } 795 796 return true; 797 } 798 799 private static void writeLmkd(ByteBuffer buf) { 800 801 for (int i = 0; i < 3; i++) { 802 if (sLmkdSocket == null) { 803 if (openLmkdSocket() == false) { 804 try { 805 Thread.sleep(1000); 806 } catch (InterruptedException ie) { 807 } 808 continue; 809 } 810 } 811 812 try { 813 sLmkdOutputStream.write(buf.array(), 0, buf.position()); 814 return; 815 } catch (IOException ex) { 816 Slog.w(TAG, "Error writing to lowmemorykiller socket"); 817 818 try { 819 sLmkdSocket.close(); 820 } catch (IOException ex2) { 821 } 822 823 sLmkdSocket = null; 824 } 825 } 826 } 827} 828