1 /* 2 * Copyright (C) 2007 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 17 package com.android.internal.os; 18 19 import static android.os.Process.PROC_COMBINE; 20 import static android.os.Process.PROC_OUT_FLOAT; 21 import static android.os.Process.PROC_OUT_LONG; 22 import static android.os.Process.PROC_OUT_STRING; 23 import static android.os.Process.PROC_PARENS; 24 import static android.os.Process.PROC_SPACE_TERM; 25 26 import android.compat.annotation.UnsupportedAppUsage; 27 import android.os.BatteryStats; 28 import android.os.Build; 29 import android.os.CpuUsageProto; 30 import android.os.Process; 31 import android.os.StrictMode; 32 import android.os.SystemClock; 33 import android.system.ErrnoException; 34 import android.system.Os; 35 import android.system.OsConstants; 36 import android.util.Slog; 37 import android.util.proto.ProtoOutputStream; 38 39 import com.android.internal.util.FastPrintWriter; 40 41 import java.io.File; 42 import java.io.FileDescriptor; 43 import java.io.PrintWriter; 44 import java.io.StringWriter; 45 import java.text.SimpleDateFormat; 46 import java.util.ArrayList; 47 import java.util.Collections; 48 import java.util.Comparator; 49 import java.util.Date; 50 import java.util.List; 51 52 public class ProcessCpuTracker { 53 private static final String TAG = "ProcessCpuTracker"; 54 private static final boolean DEBUG = false; 55 private static final boolean localLOGV = DEBUG || false; 56 57 private static final int[] PROCESS_STATS_FORMAT = new int[] { 58 PROC_SPACE_TERM, 59 PROC_SPACE_TERM|PROC_PARENS, 60 PROC_SPACE_TERM, 61 PROC_SPACE_TERM, 62 PROC_SPACE_TERM, 63 PROC_SPACE_TERM, 64 PROC_SPACE_TERM, 65 PROC_SPACE_TERM, 66 PROC_SPACE_TERM, 67 PROC_SPACE_TERM|PROC_OUT_LONG, // 10: minor faults 68 PROC_SPACE_TERM, 69 PROC_SPACE_TERM|PROC_OUT_LONG, // 12: major faults 70 PROC_SPACE_TERM, 71 PROC_SPACE_TERM|PROC_OUT_LONG, // 14: utime 72 PROC_SPACE_TERM|PROC_OUT_LONG, // 15: stime 73 }; 74 75 static final int PROCESS_STAT_MINOR_FAULTS = 0; 76 static final int PROCESS_STAT_MAJOR_FAULTS = 1; 77 static final int PROCESS_STAT_UTIME = 2; 78 static final int PROCESS_STAT_STIME = 3; 79 80 /** Stores user time and system time in jiffies. */ 81 private final long[] mProcessStatsData = new long[4]; 82 83 private static final int[] PROCESS_FULL_STATS_FORMAT = new int[] { 84 PROC_SPACE_TERM, 85 PROC_SPACE_TERM|PROC_PARENS|PROC_OUT_STRING, // 2: name 86 PROC_SPACE_TERM, 87 PROC_SPACE_TERM, 88 PROC_SPACE_TERM, 89 PROC_SPACE_TERM, 90 PROC_SPACE_TERM, 91 PROC_SPACE_TERM, 92 PROC_SPACE_TERM, 93 PROC_SPACE_TERM|PROC_OUT_LONG, // 10: minor faults 94 PROC_SPACE_TERM, 95 PROC_SPACE_TERM|PROC_OUT_LONG, // 12: major faults 96 PROC_SPACE_TERM, 97 PROC_SPACE_TERM|PROC_OUT_LONG, // 14: utime 98 PROC_SPACE_TERM|PROC_OUT_LONG, // 15: stime 99 PROC_SPACE_TERM, 100 PROC_SPACE_TERM, 101 PROC_SPACE_TERM, 102 PROC_SPACE_TERM, 103 PROC_SPACE_TERM, 104 PROC_SPACE_TERM, 105 PROC_SPACE_TERM, 106 PROC_SPACE_TERM|PROC_OUT_LONG, // 23: vsize 107 }; 108 109 static final int PROCESS_FULL_STAT_MINOR_FAULTS = 1; 110 static final int PROCESS_FULL_STAT_MAJOR_FAULTS = 2; 111 static final int PROCESS_FULL_STAT_UTIME = 3; 112 static final int PROCESS_FULL_STAT_STIME = 4; 113 static final int PROCESS_FULL_STAT_VSIZE = 5; 114 115 private final String[] mProcessFullStatsStringData = new String[6]; 116 private final long[] mProcessFullStatsData = new long[6]; 117 118 private static final int[] PROCESS_SCHEDSTATS_FORMAT = new int[] { 119 PROC_SPACE_TERM|PROC_OUT_LONG, 120 PROC_SPACE_TERM|PROC_OUT_LONG, 121 }; 122 123 static final int PROCESS_SCHEDSTAT_CPU_TIME = 0; 124 static final int PROCESS_SCHEDSTAT_CPU_DELAY_TIME = 1; 125 126 private static final int[] SYSTEM_CPU_FORMAT = new int[] { 127 PROC_SPACE_TERM|PROC_COMBINE, 128 PROC_SPACE_TERM|PROC_OUT_LONG, // 1: user time 129 PROC_SPACE_TERM|PROC_OUT_LONG, // 2: nice time 130 PROC_SPACE_TERM|PROC_OUT_LONG, // 3: sys time 131 PROC_SPACE_TERM|PROC_OUT_LONG, // 4: idle time 132 PROC_SPACE_TERM|PROC_OUT_LONG, // 5: iowait time 133 PROC_SPACE_TERM|PROC_OUT_LONG, // 6: irq time 134 PROC_SPACE_TERM|PROC_OUT_LONG // 7: softirq time 135 }; 136 137 private final long[] mSystemCpuData = new long[7]; 138 139 private static final int[] LOAD_AVERAGE_FORMAT = new int[] { 140 PROC_SPACE_TERM|PROC_OUT_FLOAT, // 0: 1 min 141 PROC_SPACE_TERM|PROC_OUT_FLOAT, // 1: 5 mins 142 PROC_SPACE_TERM|PROC_OUT_FLOAT // 2: 15 mins 143 }; 144 145 private final float[] mLoadAverageData = new float[3]; 146 147 private final boolean mIncludeThreads; 148 149 // How long a CPU jiffy is in milliseconds. 150 private final long mJiffyMillis; 151 152 private float mLoad1 = 0; 153 private float mLoad5 = 0; 154 private float mLoad15 = 0; 155 156 // All times are in milliseconds. They are converted from jiffies to milliseconds 157 // when extracted from the kernel. 158 private long mCurrentSampleTime; 159 private long mLastSampleTime; 160 161 private long mCurrentSampleRealTime; 162 private long mLastSampleRealTime; 163 164 private long mCurrentSampleWallTime; 165 private long mLastSampleWallTime; 166 167 private long mBaseUserTime; 168 private long mBaseSystemTime; 169 private long mBaseIoWaitTime; 170 private long mBaseIrqTime; 171 private long mBaseSoftIrqTime; 172 private long mBaseIdleTime; 173 private int mRelUserTime; 174 private int mRelSystemTime; 175 private int mRelIoWaitTime; 176 private int mRelIrqTime; 177 private int mRelSoftIrqTime; 178 private int mRelIdleTime; 179 private boolean mRelStatsAreGood; 180 181 private int[] mCurPids; 182 private int[] mCurThreadPids; 183 184 private final ArrayList<Stats> mProcStats = new ArrayList<Stats>(); 185 private final ArrayList<Stats> mWorkingProcs = new ArrayList<Stats>(); 186 private boolean mWorkingProcsSorted; 187 188 private boolean mFirst = true; 189 190 public interface FilterStats { 191 /** Which stats to pick when filtering */ needed(Stats stats)192 boolean needed(Stats stats); 193 } 194 195 public static class Stats { 196 public final int pid; 197 public final int uid; 198 final String statFile; 199 final String cmdlineFile; 200 final String threadsDir; 201 final ArrayList<Stats> threadStats; 202 final ArrayList<Stats> workingThreads; 203 204 public BatteryStats.Uid.Proc batteryStats; 205 206 public boolean interesting; 207 208 public String baseName; 209 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) 210 public String name; 211 public int nameWidth; 212 213 // vsize capture when process first detected; can be used to 214 // filter out kernel processes. 215 public long vsize; 216 217 /** 218 * Time in milliseconds. 219 */ 220 public long base_uptime; 221 222 /** 223 * Time in milliseconds. 224 */ 225 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) 226 public long rel_uptime; 227 228 /** 229 * Time in milliseconds. 230 */ 231 public long base_utime; 232 233 /** 234 * Time in milliseconds. 235 */ 236 public long base_stime; 237 238 /** 239 * Time in milliseconds. 240 */ 241 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) 242 public int rel_utime; 243 244 /** 245 * Time in milliseconds. 246 */ 247 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) 248 public int rel_stime; 249 250 public long base_minfaults; 251 public long base_majfaults; 252 public int rel_minfaults; 253 public int rel_majfaults; 254 255 public boolean active; 256 public boolean working; 257 public boolean added; 258 public boolean removed; 259 Stats(int _pid, int parentPid, boolean includeThreads)260 Stats(int _pid, int parentPid, boolean includeThreads) { 261 pid = _pid; 262 if (parentPid < 0) { 263 final File procDir = new File("/proc", Integer.toString(pid)); 264 uid = getUid(procDir.toString()); 265 statFile = new File(procDir, "stat").toString(); 266 cmdlineFile = new File(procDir, "cmdline").toString(); 267 threadsDir = (new File(procDir, "task")).toString(); 268 if (includeThreads) { 269 threadStats = new ArrayList<Stats>(); 270 workingThreads = new ArrayList<Stats>(); 271 } else { 272 threadStats = null; 273 workingThreads = null; 274 } 275 } else { 276 final File procDir = new File("/proc", Integer.toString( 277 parentPid)); 278 final File taskDir = new File( 279 new File(procDir, "task"), Integer.toString(pid)); 280 uid = getUid(taskDir.toString()); 281 statFile = new File(taskDir, "stat").toString(); 282 cmdlineFile = null; 283 threadsDir = null; 284 threadStats = null; 285 workingThreads = null; 286 } 287 } 288 getUid(String path)289 private static int getUid(String path) { 290 try { 291 return Os.stat(path).st_uid; 292 } catch (ErrnoException e) { 293 Slog.w(TAG, "Failed to stat(" + path + "): " + e); 294 return -1; 295 } 296 } 297 } 298 299 private final static Comparator<Stats> sLoadComparator = new Comparator<Stats>() { 300 public final int 301 compare(Stats sta, Stats stb) { 302 int ta = sta.rel_utime + sta.rel_stime; 303 int tb = stb.rel_utime + stb.rel_stime; 304 if (ta != tb) { 305 return ta > tb ? -1 : 1; 306 } 307 if (sta.added != stb.added) { 308 return sta.added ? -1 : 1; 309 } 310 if (sta.removed != stb.removed) { 311 return sta.added ? -1 : 1; 312 } 313 return 0; 314 } 315 }; 316 317 318 @UnsupportedAppUsage ProcessCpuTracker(boolean includeThreads)319 public ProcessCpuTracker(boolean includeThreads) { 320 mIncludeThreads = includeThreads; 321 long jiffyHz = Os.sysconf(OsConstants._SC_CLK_TCK); 322 mJiffyMillis = 1000/jiffyHz; 323 } 324 onLoadChanged(float load1, float load5, float load15)325 public void onLoadChanged(float load1, float load5, float load15) { 326 } 327 onMeasureProcessName(String name)328 public int onMeasureProcessName(String name) { 329 return 0; 330 } 331 init()332 public void init() { 333 if (DEBUG) Slog.v(TAG, "Init: " + this); 334 mFirst = true; 335 update(); 336 } 337 338 @UnsupportedAppUsage update()339 public void update() { 340 if (DEBUG) Slog.v(TAG, "Update: " + this); 341 342 final long nowUptime = SystemClock.uptimeMillis(); 343 final long nowRealtime = SystemClock.elapsedRealtime(); 344 final long nowWallTime = System.currentTimeMillis(); 345 346 final long[] sysCpu = mSystemCpuData; 347 if (Process.readProcFile("/proc/stat", SYSTEM_CPU_FORMAT, 348 null, sysCpu, null)) { 349 // Total user time is user + nice time. 350 final long usertime = (sysCpu[0]+sysCpu[1]) * mJiffyMillis; 351 // Total system time is simply system time. 352 final long systemtime = sysCpu[2] * mJiffyMillis; 353 // Total idle time is simply idle time. 354 final long idletime = sysCpu[3] * mJiffyMillis; 355 // Total irq time is iowait + irq + softirq time. 356 final long iowaittime = sysCpu[4] * mJiffyMillis; 357 final long irqtime = sysCpu[5] * mJiffyMillis; 358 final long softirqtime = sysCpu[6] * mJiffyMillis; 359 360 // This code is trying to avoid issues with idle time going backwards, 361 // but currently it gets into situations where it triggers most of the time. :( 362 if (true || (usertime >= mBaseUserTime && systemtime >= mBaseSystemTime 363 && iowaittime >= mBaseIoWaitTime && irqtime >= mBaseIrqTime 364 && softirqtime >= mBaseSoftIrqTime && idletime >= mBaseIdleTime)) { 365 mRelUserTime = (int)(usertime - mBaseUserTime); 366 mRelSystemTime = (int)(systemtime - mBaseSystemTime); 367 mRelIoWaitTime = (int)(iowaittime - mBaseIoWaitTime); 368 mRelIrqTime = (int)(irqtime - mBaseIrqTime); 369 mRelSoftIrqTime = (int)(softirqtime - mBaseSoftIrqTime); 370 mRelIdleTime = (int)(idletime - mBaseIdleTime); 371 mRelStatsAreGood = true; 372 373 if (DEBUG) { 374 Slog.i("Load", "Total U:" + (sysCpu[0]*mJiffyMillis) 375 + " N:" + (sysCpu[1]*mJiffyMillis) 376 + " S:" + (sysCpu[2]*mJiffyMillis) + " I:" + (sysCpu[3]*mJiffyMillis) 377 + " W:" + (sysCpu[4]*mJiffyMillis) + " Q:" + (sysCpu[5]*mJiffyMillis) 378 + " O:" + (sysCpu[6]*mJiffyMillis)); 379 Slog.i("Load", "Rel U:" + mRelUserTime + " S:" + mRelSystemTime 380 + " I:" + mRelIdleTime + " Q:" + mRelIrqTime); 381 } 382 383 mBaseUserTime = usertime; 384 mBaseSystemTime = systemtime; 385 mBaseIoWaitTime = iowaittime; 386 mBaseIrqTime = irqtime; 387 mBaseSoftIrqTime = softirqtime; 388 mBaseIdleTime = idletime; 389 390 } else { 391 mRelUserTime = 0; 392 mRelSystemTime = 0; 393 mRelIoWaitTime = 0; 394 mRelIrqTime = 0; 395 mRelSoftIrqTime = 0; 396 mRelIdleTime = 0; 397 mRelStatsAreGood = false; 398 Slog.w(TAG, "/proc/stats has gone backwards; skipping CPU update"); 399 return; 400 } 401 } 402 403 mLastSampleTime = mCurrentSampleTime; 404 mCurrentSampleTime = nowUptime; 405 mLastSampleRealTime = mCurrentSampleRealTime; 406 mCurrentSampleRealTime = nowRealtime; 407 mLastSampleWallTime = mCurrentSampleWallTime; 408 mCurrentSampleWallTime = nowWallTime; 409 410 final StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads(); 411 try { 412 mCurPids = collectStats("/proc", -1, mFirst, mCurPids, mProcStats); 413 } finally { 414 StrictMode.setThreadPolicy(savedPolicy); 415 } 416 417 final float[] loadAverages = mLoadAverageData; 418 if (Process.readProcFile("/proc/loadavg", LOAD_AVERAGE_FORMAT, 419 null, null, loadAverages)) { 420 float load1 = loadAverages[0]; 421 float load5 = loadAverages[1]; 422 float load15 = loadAverages[2]; 423 if (load1 != mLoad1 || load5 != mLoad5 || load15 != mLoad15) { 424 mLoad1 = load1; 425 mLoad5 = load5; 426 mLoad15 = load15; 427 onLoadChanged(load1, load5, load15); 428 } 429 } 430 431 if (DEBUG) Slog.i(TAG, "*** TIME TO COLLECT STATS: " 432 + (SystemClock.uptimeMillis()-mCurrentSampleTime)); 433 434 mWorkingProcsSorted = false; 435 mFirst = false; 436 } 437 collectStats(String statsFile, int parentPid, boolean first, int[] curPids, ArrayList<Stats> allProcs)438 private int[] collectStats(String statsFile, int parentPid, boolean first, 439 int[] curPids, ArrayList<Stats> allProcs) { 440 441 int[] pids = Process.getPids(statsFile, curPids); 442 int NP = (pids == null) ? 0 : pids.length; 443 int NS = allProcs.size(); 444 int curStatsIndex = 0; 445 for (int i=0; i<NP; i++) { 446 int pid = pids[i]; 447 if (pid < 0) { 448 NP = pid; 449 break; 450 } 451 Stats st = curStatsIndex < NS ? allProcs.get(curStatsIndex) : null; 452 453 if (st != null && st.pid == pid) { 454 // Update an existing process... 455 st.added = false; 456 st.working = false; 457 curStatsIndex++; 458 if (DEBUG) Slog.v(TAG, "Existing " 459 + (parentPid < 0 ? "process" : "thread") 460 + " pid " + pid + ": " + st); 461 462 if (st.interesting) { 463 final long uptime = SystemClock.uptimeMillis(); 464 465 final long[] procStats = mProcessStatsData; 466 if (!Process.readProcFile(st.statFile.toString(), 467 PROCESS_STATS_FORMAT, null, procStats, null)) { 468 continue; 469 } 470 471 final long minfaults = procStats[PROCESS_STAT_MINOR_FAULTS]; 472 final long majfaults = procStats[PROCESS_STAT_MAJOR_FAULTS]; 473 final long utime = procStats[PROCESS_STAT_UTIME] * mJiffyMillis; 474 final long stime = procStats[PROCESS_STAT_STIME] * mJiffyMillis; 475 476 if (utime == st.base_utime && stime == st.base_stime) { 477 st.rel_utime = 0; 478 st.rel_stime = 0; 479 st.rel_minfaults = 0; 480 st.rel_majfaults = 0; 481 if (st.active) { 482 st.active = false; 483 } 484 continue; 485 } 486 487 if (!st.active) { 488 st.active = true; 489 } 490 491 if (parentPid < 0) { 492 getName(st, st.cmdlineFile); 493 if (st.threadStats != null) { 494 mCurThreadPids = collectStats(st.threadsDir, pid, false, 495 mCurThreadPids, st.threadStats); 496 } 497 } 498 499 if (DEBUG) Slog.v("Load", "Stats changed " + st.name + " pid=" + st.pid 500 + " utime=" + utime + "-" + st.base_utime 501 + " stime=" + stime + "-" + st.base_stime 502 + " minfaults=" + minfaults + "-" + st.base_minfaults 503 + " majfaults=" + majfaults + "-" + st.base_majfaults); 504 505 st.rel_uptime = uptime - st.base_uptime; 506 st.base_uptime = uptime; 507 st.rel_utime = (int)(utime - st.base_utime); 508 st.rel_stime = (int)(stime - st.base_stime); 509 st.base_utime = utime; 510 st.base_stime = stime; 511 st.rel_minfaults = (int)(minfaults - st.base_minfaults); 512 st.rel_majfaults = (int)(majfaults - st.base_majfaults); 513 st.base_minfaults = minfaults; 514 st.base_majfaults = majfaults; 515 st.working = true; 516 } 517 518 continue; 519 } 520 521 if (st == null || st.pid > pid) { 522 // We have a new process! 523 st = new Stats(pid, parentPid, mIncludeThreads); 524 allProcs.add(curStatsIndex, st); 525 curStatsIndex++; 526 NS++; 527 if (DEBUG) Slog.v(TAG, "New " 528 + (parentPid < 0 ? "process" : "thread") 529 + " pid " + pid + ": " + st); 530 531 final String[] procStatsString = mProcessFullStatsStringData; 532 final long[] procStats = mProcessFullStatsData; 533 st.base_uptime = SystemClock.uptimeMillis(); 534 String path = st.statFile.toString(); 535 //Slog.d(TAG, "Reading proc file: " + path); 536 if (Process.readProcFile(path, PROCESS_FULL_STATS_FORMAT, procStatsString, 537 procStats, null)) { 538 // This is a possible way to filter out processes that 539 // are actually kernel threads... do we want to? Some 540 // of them do use CPU, but there can be a *lot* that are 541 // not doing anything. 542 st.vsize = procStats[PROCESS_FULL_STAT_VSIZE]; 543 if (true || procStats[PROCESS_FULL_STAT_VSIZE] != 0) { 544 st.interesting = true; 545 st.baseName = procStatsString[0]; 546 st.base_minfaults = procStats[PROCESS_FULL_STAT_MINOR_FAULTS]; 547 st.base_majfaults = procStats[PROCESS_FULL_STAT_MAJOR_FAULTS]; 548 st.base_utime = procStats[PROCESS_FULL_STAT_UTIME] * mJiffyMillis; 549 st.base_stime = procStats[PROCESS_FULL_STAT_STIME] * mJiffyMillis; 550 } else { 551 Slog.i(TAG, "Skipping kernel process pid " + pid 552 + " name " + procStatsString[0]); 553 st.baseName = procStatsString[0]; 554 } 555 } else { 556 Slog.w(TAG, "Skipping unknown process pid " + pid); 557 st.baseName = "<unknown>"; 558 st.base_utime = st.base_stime = 0; 559 st.base_minfaults = st.base_majfaults = 0; 560 } 561 562 if (parentPid < 0) { 563 getName(st, st.cmdlineFile); 564 if (st.threadStats != null) { 565 mCurThreadPids = collectStats(st.threadsDir, pid, true, 566 mCurThreadPids, st.threadStats); 567 } 568 } else if (st.interesting) { 569 st.name = st.baseName; 570 st.nameWidth = onMeasureProcessName(st.name); 571 } 572 573 if (DEBUG) Slog.v("Load", "Stats added " + st.name + " pid=" + st.pid 574 + " utime=" + st.base_utime + " stime=" + st.base_stime 575 + " minfaults=" + st.base_minfaults + " majfaults=" + st.base_majfaults); 576 577 st.rel_utime = 0; 578 st.rel_stime = 0; 579 st.rel_minfaults = 0; 580 st.rel_majfaults = 0; 581 st.added = true; 582 if (!first && st.interesting) { 583 st.working = true; 584 } 585 continue; 586 } 587 588 // This process has gone away! 589 st.rel_utime = 0; 590 st.rel_stime = 0; 591 st.rel_minfaults = 0; 592 st.rel_majfaults = 0; 593 st.removed = true; 594 st.working = true; 595 allProcs.remove(curStatsIndex); 596 NS--; 597 if (DEBUG) Slog.v(TAG, "Removed " 598 + (parentPid < 0 ? "process" : "thread") 599 + " pid " + pid + ": " + st); 600 // Decrement the loop counter so that we process the current pid 601 // again the next time through the loop. 602 i--; 603 continue; 604 } 605 606 while (curStatsIndex < NS) { 607 // This process has gone away! 608 final Stats st = allProcs.get(curStatsIndex); 609 st.rel_utime = 0; 610 st.rel_stime = 0; 611 st.rel_minfaults = 0; 612 st.rel_majfaults = 0; 613 st.removed = true; 614 st.working = true; 615 allProcs.remove(curStatsIndex); 616 NS--; 617 if (localLOGV) Slog.v(TAG, "Removed pid " + st.pid + ": " + st); 618 } 619 620 return pids; 621 } 622 623 /** 624 * Returns the total time (in milliseconds) the given PID has spent 625 * executing in both user and system code. Safe to call without lock held. 626 */ 627 public long getCpuTimeForPid(int pid) { 628 final String statFile = "/proc/" + pid + "/stat"; 629 final long[] statsData = new long[4]; 630 if (Process.readProcFile(statFile, PROCESS_STATS_FORMAT, 631 null, statsData, null)) { 632 long time = statsData[PROCESS_STAT_UTIME] 633 + statsData[PROCESS_STAT_STIME]; 634 return time * mJiffyMillis; 635 } 636 return 0; 637 } 638 639 /** 640 * Returns the total time (in milliseconds) the given PID has spent waiting 641 * in the runqueue. Safe to call without lock held. 642 */ 643 public long getCpuDelayTimeForPid(int pid) { 644 final String statFile = "/proc/" + pid + "/schedstat"; 645 final long[] statsData = new long[4]; 646 if (Process.readProcFile(statFile, PROCESS_SCHEDSTATS_FORMAT, 647 null, statsData, null)) { 648 return statsData[PROCESS_SCHEDSTAT_CPU_DELAY_TIME] / 1_000_000; 649 } 650 return 0; 651 } 652 653 /** 654 * @return time in milliseconds. 655 */ 656 final public int getLastUserTime() { 657 return mRelUserTime; 658 } 659 660 /** 661 * @return time in milliseconds. 662 */ 663 final public int getLastSystemTime() { 664 return mRelSystemTime; 665 } 666 667 /** 668 * @return time in milliseconds. 669 */ 670 final public int getLastIoWaitTime() { 671 return mRelIoWaitTime; 672 } 673 674 /** 675 * @return time in milliseconds. 676 */ 677 final public int getLastIrqTime() { 678 return mRelIrqTime; 679 } 680 681 /** 682 * @return time in milliseconds. 683 */ 684 final public int getLastSoftIrqTime() { 685 return mRelSoftIrqTime; 686 } 687 688 /** 689 * @return time in milliseconds. 690 */ 691 final public int getLastIdleTime() { 692 return mRelIdleTime; 693 } 694 695 final public boolean hasGoodLastStats() { 696 return mRelStatsAreGood; 697 } 698 699 final public float getTotalCpuPercent() { 700 int denom = mRelUserTime+mRelSystemTime+mRelIrqTime+mRelIdleTime; 701 if (denom <= 0) { 702 return 0; 703 } 704 return ((float)(mRelUserTime+mRelSystemTime+mRelIrqTime)*100) / denom; 705 } 706 707 final void buildWorkingProcs() { 708 if (!mWorkingProcsSorted) { 709 mWorkingProcs.clear(); 710 final int N = mProcStats.size(); 711 for (int i=0; i<N; i++) { 712 Stats stats = mProcStats.get(i); 713 if (stats.working) { 714 mWorkingProcs.add(stats); 715 if (stats.threadStats != null && stats.threadStats.size() > 1) { 716 stats.workingThreads.clear(); 717 final int M = stats.threadStats.size(); 718 for (int j=0; j<M; j++) { 719 Stats tstats = stats.threadStats.get(j); 720 if (tstats.working) { 721 stats.workingThreads.add(tstats); 722 } 723 } 724 Collections.sort(stats.workingThreads, sLoadComparator); 725 } 726 } 727 } 728 Collections.sort(mWorkingProcs, sLoadComparator); 729 mWorkingProcsSorted = true; 730 } 731 } 732 733 final public int countStats() { 734 return mProcStats.size(); 735 } 736 737 final public Stats getStats(int index) { 738 return mProcStats.get(index); 739 } 740 741 final public List<Stats> getStats(FilterStats filter) { 742 final ArrayList<Stats> statses = new ArrayList<>(mProcStats.size()); 743 final int N = mProcStats.size(); 744 for (int p = 0; p < N; p++) { 745 Stats stats = mProcStats.get(p); 746 if (filter.needed(stats)) { 747 statses.add(stats); 748 } 749 } 750 return statses; 751 } 752 753 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) 754 final public int countWorkingStats() { 755 buildWorkingProcs(); 756 return mWorkingProcs.size(); 757 } 758 759 @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) 760 final public Stats getWorkingStats(int index) { 761 return mWorkingProcs.get(index); 762 } 763 764 /** Dump cpuinfo in protobuf format. */ 765 public final void dumpProto(FileDescriptor fd) { 766 final long now = SystemClock.uptimeMillis(); 767 final ProtoOutputStream proto = new ProtoOutputStream(fd); 768 final long currentLoadToken = proto.start(CpuUsageProto.CURRENT_LOAD); 769 proto.write(CpuUsageProto.Load.LOAD1, mLoad1); 770 proto.write(CpuUsageProto.Load.LOAD5, mLoad5); 771 proto.write(CpuUsageProto.Load.LOAD15, mLoad15); 772 proto.end(currentLoadToken); 773 774 buildWorkingProcs(); 775 776 proto.write(CpuUsageProto.NOW, now); 777 proto.write(CpuUsageProto.LAST_SAMPLE_TIME, mLastSampleTime); 778 proto.write(CpuUsageProto.CURRENT_SAMPLE_TIME, mCurrentSampleTime); 779 proto.write(CpuUsageProto.LAST_SAMPLE_REAL_TIME, mLastSampleRealTime); 780 proto.write(CpuUsageProto.CURRENT_SAMPLE_REAL_TIME, mCurrentSampleRealTime); 781 proto.write(CpuUsageProto.LAST_SAMPLE_WALL_TIME, mLastSampleWallTime); 782 proto.write(CpuUsageProto.CURRENT_SAMPLE_WALL_TIME, mCurrentSampleWallTime); 783 784 proto.write(CpuUsageProto.TOTAL_USER_TIME, mRelUserTime); 785 proto.write(CpuUsageProto.TOTAL_SYSTEM_TIME, mRelSystemTime); 786 proto.write(CpuUsageProto.TOTAL_IOWAIT_TIME, mRelIoWaitTime); 787 proto.write(CpuUsageProto.TOTAL_IRQ_TIME, mRelIrqTime); 788 proto.write(CpuUsageProto.TOTAL_SOFT_IRQ_TIME, mRelSoftIrqTime); 789 proto.write(CpuUsageProto.TOTAL_IDLE_TIME, mRelIdleTime); 790 final int totalTime = mRelUserTime + mRelSystemTime + mRelIoWaitTime 791 + mRelIrqTime + mRelSoftIrqTime + mRelIdleTime; 792 proto.write(CpuUsageProto.TOTAL_TIME, totalTime); 793 794 for (Stats st : mWorkingProcs) { 795 dumpProcessCpuProto(proto, st, null); 796 if (!st.removed && st.workingThreads != null) { 797 for (Stats tst : st.workingThreads) { 798 dumpProcessCpuProto(proto, tst, st); 799 } 800 } 801 } 802 proto.flush(); 803 } 804 805 private static void dumpProcessCpuProto(ProtoOutputStream proto, Stats st, Stats proc) { 806 long statToken = proto.start(CpuUsageProto.PROCESSES); 807 proto.write(CpuUsageProto.Stat.UID, st.uid); 808 proto.write(CpuUsageProto.Stat.PID, st.pid); 809 proto.write(CpuUsageProto.Stat.NAME, st.name); 810 proto.write(CpuUsageProto.Stat.ADDED, st.added); 811 proto.write(CpuUsageProto.Stat.REMOVED, st.removed); 812 proto.write(CpuUsageProto.Stat.UPTIME, st.rel_uptime); 813 proto.write(CpuUsageProto.Stat.USER_TIME, st.rel_utime); 814 proto.write(CpuUsageProto.Stat.SYSTEM_TIME, st.rel_stime); 815 proto.write(CpuUsageProto.Stat.MINOR_FAULTS, st.rel_minfaults); 816 proto.write(CpuUsageProto.Stat.MAJOR_FAULTS, st.rel_majfaults); 817 if (proc != null) { 818 proto.write(CpuUsageProto.Stat.PARENT_PID, proc.pid); 819 } 820 proto.end(statToken); 821 } 822 823 final public String printCurrentLoad() { 824 StringWriter sw = new StringWriter(); 825 PrintWriter pw = new FastPrintWriter(sw, false, 128); 826 pw.print("Load: "); 827 pw.print(mLoad1); 828 pw.print(" / "); 829 pw.print(mLoad5); 830 pw.print(" / "); 831 pw.println(mLoad15); 832 pw.flush(); 833 return sw.toString(); 834 } 835 836 /** 837 * Returns current CPU state with all the processes as a String, sorted by load 838 * in descending order. 839 */ 840 public final String printCurrentState(long now) { 841 return printCurrentState(now, Integer.MAX_VALUE); 842 } 843 844 /** 845 * Returns current CPU state with the top {@code maxProcessesToDump} highest load 846 * processes as a String, sorted by load in descending order. 847 */ 848 public final String printCurrentState(long now, int maxProcessesToDump) { 849 final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS"); 850 851 buildWorkingProcs(); 852 853 StringWriter sw = new StringWriter(); 854 PrintWriter pw = new FastPrintWriter(sw, false, 1024); 855 856 pw.print("CPU usage from "); 857 if (now > mLastSampleTime) { 858 pw.print(now-mLastSampleTime); 859 pw.print("ms to "); 860 pw.print(now-mCurrentSampleTime); 861 pw.print("ms ago"); 862 } else { 863 pw.print(mLastSampleTime-now); 864 pw.print("ms to "); 865 pw.print(mCurrentSampleTime-now); 866 pw.print("ms later"); 867 } 868 pw.print(" ("); 869 pw.print(sdf.format(new Date(mLastSampleWallTime))); 870 pw.print(" to "); 871 pw.print(sdf.format(new Date(mCurrentSampleWallTime))); 872 pw.print(")"); 873 874 long sampleTime = mCurrentSampleTime - mLastSampleTime; 875 long sampleRealTime = mCurrentSampleRealTime - mLastSampleRealTime; 876 long percAwake = sampleRealTime > 0 ? ((sampleTime*100) / sampleRealTime) : 0; 877 if (percAwake != 100) { 878 pw.print(" with "); 879 pw.print(percAwake); 880 pw.print("% awake"); 881 } 882 pw.println(":"); 883 884 final int totalTime = mRelUserTime + mRelSystemTime + mRelIoWaitTime 885 + mRelIrqTime + mRelSoftIrqTime + mRelIdleTime; 886 887 if (DEBUG) Slog.i(TAG, "totalTime " + totalTime + " over sample time " 888 + (mCurrentSampleTime-mLastSampleTime)); 889 890 int dumpedProcessCount = Math.min(maxProcessesToDump, mWorkingProcs.size()); 891 for (int i = 0; i < dumpedProcessCount; i++) { 892 Stats st = mWorkingProcs.get(i); 893 printProcessCPU(pw, st.added ? " +" : (st.removed ? " -": " "), 894 st.pid, st.name, (int)st.rel_uptime, 895 st.rel_utime, st.rel_stime, 0, 0, 0, st.rel_minfaults, st.rel_majfaults); 896 if (!st.removed && st.workingThreads != null) { 897 int M = st.workingThreads.size(); 898 for (int j=0; j<M; j++) { 899 Stats tst = st.workingThreads.get(j); 900 printProcessCPU(pw, 901 tst.added ? " +" : (tst.removed ? " -": " "), 902 tst.pid, tst.name, (int)st.rel_uptime, 903 tst.rel_utime, tst.rel_stime, 0, 0, 0, 0, 0); 904 } 905 } 906 } 907 908 printProcessCPU(pw, "", -1, "TOTAL", totalTime, mRelUserTime, mRelSystemTime, 909 mRelIoWaitTime, mRelIrqTime, mRelSoftIrqTime, 0, 0); 910 911 pw.flush(); 912 return sw.toString(); 913 } 914 915 private void printRatio(PrintWriter pw, long numerator, long denominator) { 916 long thousands = (numerator*1000)/denominator; 917 long hundreds = thousands/10; 918 pw.print(hundreds); 919 if (hundreds < 10) { 920 long remainder = thousands - (hundreds*10); 921 if (remainder != 0) { 922 pw.print('.'); 923 pw.print(remainder); 924 } 925 } 926 } 927 928 private void printProcessCPU(PrintWriter pw, String prefix, int pid, String label, 929 int totalTime, int user, int system, int iowait, int irq, int softIrq, 930 int minFaults, int majFaults) { 931 pw.print(prefix); 932 if (totalTime == 0) totalTime = 1; 933 printRatio(pw, user+system+iowait+irq+softIrq, totalTime); 934 pw.print("% "); 935 if (pid >= 0) { 936 pw.print(pid); 937 pw.print("/"); 938 } 939 pw.print(label); 940 pw.print(": "); 941 printRatio(pw, user, totalTime); 942 pw.print("% user + "); 943 printRatio(pw, system, totalTime); 944 pw.print("% kernel"); 945 if (iowait > 0) { 946 pw.print(" + "); 947 printRatio(pw, iowait, totalTime); 948 pw.print("% iowait"); 949 } 950 if (irq > 0) { 951 pw.print(" + "); 952 printRatio(pw, irq, totalTime); 953 pw.print("% irq"); 954 } 955 if (softIrq > 0) { 956 pw.print(" + "); 957 printRatio(pw, softIrq, totalTime); 958 pw.print("% softirq"); 959 } 960 if (minFaults > 0 || majFaults > 0) { 961 pw.print(" / faults:"); 962 if (minFaults > 0) { 963 pw.print(" "); 964 pw.print(minFaults); 965 pw.print(" minor"); 966 } 967 if (majFaults > 0) { 968 pw.print(" "); 969 pw.print(majFaults); 970 pw.print(" major"); 971 } 972 } 973 pw.println(); 974 } 975 976 private void getName(Stats st, String cmdlineFile) { 977 String newName = st.name; 978 if (st.name == null 979 || st.name.equals("app_process") 980 || st.name.equals("<pre-initialized>") 981 || st.name.equals("usap32") 982 || st.name.equals("usap64")) { 983 String cmdName = ProcStatsUtil.readTerminatedProcFile(cmdlineFile, (byte) '\0'); 984 if (cmdName != null && cmdName.length() > 1) { 985 newName = cmdName; 986 int i = newName.lastIndexOf("/"); 987 if (i > 0 && i < newName.length()-1) { 988 newName = newName.substring(i+1); 989 } 990 } 991 if (newName == null) { 992 newName = st.baseName; 993 } 994 } 995 if (st.name == null || !newName.equals(st.name)) { 996 st.name = newName; 997 st.nameWidth = onMeasureProcessName(st.name); 998 } 999 } 1000 } 1001