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Diffstat (limited to 'services/java/com/android/server/ProcessStats.java')
| -rw-r--r-- | services/java/com/android/server/ProcessStats.java | 580 |
1 files changed, 580 insertions, 0 deletions
diff --git a/services/java/com/android/server/ProcessStats.java b/services/java/com/android/server/ProcessStats.java new file mode 100644 index 000000000000..55adabbfa7a0 --- /dev/null +++ b/services/java/com/android/server/ProcessStats.java @@ -0,0 +1,580 @@ +/* + * Copyright (C) 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.server; + +import static android.os.Process.*; + +import android.os.Process; +import android.os.SystemClock; +import android.util.Config; +import android.util.Log; + +import java.io.File; +import java.io.FileInputStream; +import java.io.PrintWriter; +import java.io.StringWriter; +import java.util.ArrayList; +import java.util.Collections; +import java.util.Comparator; + +public class ProcessStats { + private static final String TAG = "ProcessStats"; + private static final boolean DEBUG = false; + private static final boolean localLOGV = DEBUG || Config.LOGV; + + private static final int[] PROCESS_STATS_FORMAT = new int[] { + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM|PROC_OUT_LONG, // 13: utime + PROC_SPACE_TERM|PROC_OUT_LONG // 14: stime + }; + + private final long[] mProcessStatsData = new long[2]; + + private static final int[] PROCESS_FULL_STATS_FORMAT = new int[] { + PROC_SPACE_TERM, + PROC_SPACE_TERM|PROC_PARENS|PROC_OUT_STRING, // 1: name + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM, + PROC_SPACE_TERM|PROC_OUT_LONG, // 13: utime + PROC_SPACE_TERM|PROC_OUT_LONG // 14: stime + }; + + private final String[] mProcessFullStatsStringData = new String[3]; + private final long[] mProcessFullStatsData = new long[3]; + + private static final int[] SYSTEM_CPU_FORMAT = new int[] { + PROC_SPACE_TERM|PROC_COMBINE, + PROC_SPACE_TERM|PROC_OUT_LONG, // 1: user time + PROC_SPACE_TERM|PROC_OUT_LONG, // 2: nice time + PROC_SPACE_TERM|PROC_OUT_LONG, // 3: sys time + PROC_SPACE_TERM|PROC_OUT_LONG, // 4: idle time + PROC_SPACE_TERM|PROC_OUT_LONG, // 5: iowait time + PROC_SPACE_TERM|PROC_OUT_LONG, // 6: irq time + PROC_SPACE_TERM|PROC_OUT_LONG // 7: softirq time + }; + + private final long[] mSystemCpuData = new long[7]; + + private static final int[] LOAD_AVERAGE_FORMAT = new int[] { + PROC_SPACE_TERM|PROC_OUT_FLOAT, // 0: 1 min + PROC_SPACE_TERM|PROC_OUT_FLOAT, // 1: 5 mins + PROC_SPACE_TERM|PROC_OUT_FLOAT // 2: 15 mins + }; + + private final float[] mLoadAverageData = new float[3]; + + private final boolean mIncludeThreads; + + private float mLoad1 = 0; + private float mLoad5 = 0; + private float mLoad15 = 0; + + private long mCurrentSampleTime; + private long mLastSampleTime; + + private long mBaseUserTime; + private long mBaseSystemTime; + private long mBaseIoWaitTime; + private long mBaseIrqTime; + private long mBaseSoftIrqTime; + private long mBaseIdleTime; + private int mRelUserTime; + private int mRelSystemTime; + private int mRelIoWaitTime; + private int mRelIrqTime; + private int mRelSoftIrqTime; + private int mRelIdleTime; + + private int[] mCurPids; + private int[] mCurThreadPids; + + private final ArrayList<Stats> mProcStats = new ArrayList<Stats>(); + private final ArrayList<Stats> mWorkingProcs = new ArrayList<Stats>(); + private boolean mWorkingProcsSorted; + + private boolean mFirst = true; + + private byte[] mBuffer = new byte[256]; + + public static class Stats { + public final int pid; + final String statFile; + final String cmdlineFile; + final String threadsDir; + final ArrayList<Stats> threadStats; + final ArrayList<Stats> workingThreads; + + public String baseName; + public String name; + int nameWidth; + + public long base_utime; + public long base_stime; + public int rel_utime; + public int rel_stime; + + public boolean active; + public boolean added; + public boolean removed; + + Stats(int _pid, int parentPid, boolean includeThreads) { + pid = _pid; + if (parentPid < 0) { + final File procDir = new File("/proc", Integer.toString(pid)); + statFile = new File(procDir, "stat").toString(); + cmdlineFile = new File(procDir, "cmdline").toString(); + threadsDir = (new File(procDir, "task")).toString(); + if (includeThreads) { + threadStats = new ArrayList<Stats>(); + workingThreads = new ArrayList<Stats>(); + } else { + threadStats = null; + workingThreads = null; + } + } else { + final File procDir = new File("/proc", Integer.toString( + parentPid)); + final File taskDir = new File( + new File(procDir, "task"), Integer.toString(pid)); + statFile = new File(taskDir, "stat").toString(); + cmdlineFile = null; + threadsDir = null; + threadStats = null; + workingThreads = null; + } + } + } + + private final static Comparator<Stats> sLoadComparator = new Comparator<Stats>() { + public final int + compare(Stats sta, Stats stb) + { + int ta = sta.rel_utime + sta.rel_stime; + int tb = stb.rel_utime + stb.rel_stime; + if (ta != tb) { + return ta > tb ? -1 : 1; + } + if (sta.added != stb.added) { + return sta.added ? -1 : 1; + } + if (sta.removed != stb.removed) { + return sta.added ? -1 : 1; + } + return 0; + } + }; + + + public ProcessStats(boolean includeThreads) { + mIncludeThreads = includeThreads; + } + + public void onLoadChanged(float load1, float load5, float load15) { + } + + public int onMeasureProcessName(String name) { + return 0; + } + + public void init() { + mFirst = true; + update(); + } + + public void update() { + mLastSampleTime = mCurrentSampleTime; + mCurrentSampleTime = SystemClock.uptimeMillis(); + + final float[] loadAverages = mLoadAverageData; + if (Process.readProcFile("/proc/loadavg", LOAD_AVERAGE_FORMAT, + null, null, loadAverages)) { + float load1 = loadAverages[0]; + float load5 = loadAverages[1]; + float load15 = loadAverages[2]; + if (load1 != mLoad1 || load5 != mLoad5 || load15 != mLoad15) { + mLoad1 = load1; + mLoad5 = load5; + mLoad15 = load15; + onLoadChanged(load1, load5, load15); + } + } + + mCurPids = collectStats("/proc", -1, mFirst, mCurPids, + mProcStats, mWorkingProcs); + mFirst = false; + + final long[] sysCpu = mSystemCpuData; + if (Process.readProcFile("/proc/stat", SYSTEM_CPU_FORMAT, + null, sysCpu, null)) { + // Total user time is user + nice time. + final long usertime = sysCpu[0]+sysCpu[1]; + // Total system time is simply system time. + final long systemtime = sysCpu[2]; + // Total idle time is simply idle time. + final long idletime = sysCpu[3]; + // Total irq time is iowait + irq + softirq time. + final long iowaittime = sysCpu[4]; + final long irqtime = sysCpu[5]; + final long softirqtime = sysCpu[6]; + + mRelUserTime = (int)(usertime - mBaseUserTime); + mRelSystemTime = (int)(systemtime - mBaseSystemTime); + mRelIoWaitTime = (int)(iowaittime - mBaseIoWaitTime); + mRelIrqTime = (int)(irqtime - mBaseIrqTime); + mRelSoftIrqTime = (int)(softirqtime - mBaseSoftIrqTime); + mRelIdleTime = (int)(idletime - mBaseIdleTime); + + if (false) { + Log.i("Load", "Total U:" + sysCpu[0] + " N:" + sysCpu[1] + + " S:" + sysCpu[2] + " I:" + sysCpu[3] + + " W:" + sysCpu[4] + " Q:" + sysCpu[5] + + " O:" + sysCpu[6]); + Log.i("Load", "Rel U:" + mRelUserTime + " S:" + mRelSystemTime + + " I:" + mRelIdleTime + " Q:" + mRelIrqTime); + } + + mBaseUserTime = usertime; + mBaseSystemTime = systemtime; + mBaseIoWaitTime = iowaittime; + mBaseIrqTime = irqtime; + mBaseSoftIrqTime = softirqtime; + mBaseIdleTime = idletime; + } + + mWorkingProcsSorted = false; + mFirst = false; + } + + private int[] collectStats(String statsFile, int parentPid, boolean first, + int[] curPids, ArrayList<Stats> allProcs, + ArrayList<Stats> workingProcs) { + + workingProcs.clear(); + + int[] pids = Process.getPids(statsFile, curPids); + int NP = (pids == null) ? 0 : pids.length; + int NS = allProcs.size(); + int curStatsIndex = 0; + for (int i=0; i<NP; i++) { + int pid = pids[i]; + if (pid < 0) { + NP = pid; + break; + } + Stats st = curStatsIndex < NS ? allProcs.get(curStatsIndex) : null; + + if (st != null && st.pid == pid) { + // Update an existing process... + st.added = false; + curStatsIndex++; + if (localLOGV) Log.v(TAG, "Existing pid " + pid + ": " + st); + + final long[] procStats = mProcessStatsData; + if (!Process.readProcFile(st.statFile.toString(), + PROCESS_STATS_FORMAT, null, procStats, null)) { + continue; + } + + final long utime = procStats[0]; + final long stime = procStats[1]; + + if (utime == st.base_utime && stime == st.base_stime) { + st.rel_utime = 0; + st.rel_stime = 0; + if (st.active) { + st.active = false; + } + continue; + } + + if (!st.active) { + st.active = true; + } + + if (parentPid < 0) { + getName(st, st.cmdlineFile); + if (st.threadStats != null) { + mCurThreadPids = collectStats(st.threadsDir, pid, false, + mCurThreadPids, st.threadStats, + st.workingThreads); + } + } + + st.rel_utime = (int)(utime - st.base_utime); + st.rel_stime = (int)(stime - st.base_stime); + st.base_utime = utime; + st.base_stime = stime; + //Log.i("Load", "Stats changed " + name + " pid=" + st.pid + // + " name=" + st.name + " utime=" + utime + // + " stime=" + stime); + workingProcs.add(st); + continue; + } + + if (st == null || st.pid > pid) { + // We have a new process! + st = new Stats(pid, parentPid, mIncludeThreads); + allProcs.add(curStatsIndex, st); + curStatsIndex++; + NS++; + if (localLOGV) Log.v(TAG, "New pid " + pid + ": " + st); + + final String[] procStatsString = mProcessFullStatsStringData; + final long[] procStats = mProcessFullStatsData; + if (Process.readProcFile(st.statFile.toString(), + PROCESS_FULL_STATS_FORMAT, procStatsString, + procStats, null)) { + st.baseName = parentPid < 0 + ? procStatsString[0] : Integer.toString(pid); + st.base_utime = procStats[1]; + st.base_stime = procStats[2]; + } else { + st.baseName = "<unknown>"; + st.base_utime = st.base_stime = 0; + } + + if (parentPid < 0) { + getName(st, st.cmdlineFile); + } else { + st.name = st.baseName; + st.nameWidth = onMeasureProcessName(st.name); + if (st.threadStats != null) { + mCurThreadPids = collectStats(st.threadsDir, pid, true, + mCurThreadPids, st.threadStats, + st.workingThreads); + } + } + + //Log.i("Load", "New process: " + st.pid + " " + st.name); + st.rel_utime = 0; + st.rel_stime = 0; + st.added = true; + if (!first) { + workingProcs.add(st); + } + continue; + } + + // This process has gone away! + st.rel_utime = 0; + st.rel_stime = 0; + st.removed = true; + workingProcs.add(st); + allProcs.remove(curStatsIndex); + NS--; + if (localLOGV) Log.v(TAG, "Removed pid " + st.pid + ": " + st); + // Decrement the loop counter so that we process the current pid + // again the next time through the loop. + i--; + continue; + } + + while (curStatsIndex < NS) { + // This process has gone away! + final Stats st = allProcs.get(curStatsIndex); + st.rel_utime = 0; + st.rel_stime = 0; + st.removed = true; + workingProcs.add(st); + allProcs.remove(curStatsIndex); + NS--; + if (localLOGV) Log.v(TAG, "Removed pid " + st.pid + ": " + st); + } + + return pids; + } + + final public int getLastUserTime() { + return mRelUserTime; + } + + final public int getLastSystemTime() { + return mRelSystemTime; + } + + final public int getLastIoWaitTime() { + return mRelIoWaitTime; + } + + final public int getLastIrqTime() { + return mRelIrqTime; + } + + final public int getLastSoftIrqTime() { + return mRelSoftIrqTime; + } + + final public int getLastIdleTime() { + return mRelIdleTime; + } + + final public float getTotalCpuPercent() { + return ((float)(mRelUserTime+mRelSystemTime+mRelIrqTime)*100) + / (mRelUserTime+mRelSystemTime+mRelIrqTime+mRelIdleTime); + } + + final public int countWorkingStats() { + if (!mWorkingProcsSorted) { + Collections.sort(mWorkingProcs, sLoadComparator); + mWorkingProcsSorted = true; + } + return mWorkingProcs.size(); + } + + final public Stats getWorkingStats(int index) { + return mWorkingProcs.get(index); + } + + final public String printCurrentState() { + if (!mWorkingProcsSorted) { + Collections.sort(mWorkingProcs, sLoadComparator); + mWorkingProcsSorted = true; + } + + StringWriter sw = new StringWriter(); + PrintWriter pw = new PrintWriter(sw); + pw.print("Load: "); + pw.print(mLoad1); + pw.print(" / "); + pw.print(mLoad5); + pw.print(" / "); + pw.println(mLoad15); + + long now = SystemClock.uptimeMillis(); + + pw.print("CPU usage from "); + pw.print(now-mLastSampleTime); + pw.print("ms to "); + pw.print(now-mCurrentSampleTime); + pw.println("ms ago:"); + + final int totalTime = mRelUserTime + mRelSystemTime + mRelIoWaitTime + mRelIrqTime + + mRelSoftIrqTime + mRelIdleTime; + + int N = mWorkingProcs.size(); + for (int i=0; i<N; i++) { + Stats st = mWorkingProcs.get(i); + printProcessCPU(pw, st.added ? " +" : (st.removed ? " -": " "), + st.name, totalTime, st.rel_utime, st.rel_stime, 0, 0, 0); + if (!st.removed && st.workingThreads != null) { + int M = st.workingThreads.size(); + for (int j=0; j<M; j++) { + Stats tst = st.workingThreads.get(j); + printProcessCPU(pw, + tst.added ? " +" : (tst.removed ? " -": " "), + tst.name, totalTime, tst.rel_utime, tst.rel_stime, 0, 0, 0); + } + } + } + + printProcessCPU(pw, "", "TOTAL", totalTime, mRelUserTime, mRelSystemTime, mRelIoWaitTime, + mRelIrqTime, mRelSoftIrqTime); + + return sw.toString(); + } + + private void printProcessCPU(PrintWriter pw, String prefix, String label, int totalTime, + int user, int system, int iowait, int irq, int softIrq) { + pw.print(prefix); + pw.print(label); + pw.print(": "); + if (totalTime == 0) totalTime = 1; + pw.print(((user+system+iowait+irq+softIrq)*100)/totalTime); + pw.print("% = "); + pw.print((user*100)/totalTime); + pw.print("% user + "); + pw.print((system*100)/totalTime); + pw.print("% kernel"); + if (iowait > 0) { + pw.print(" + "); + pw.print((iowait*100)/totalTime); + pw.print("% iowait"); + } + if (irq > 0) { + pw.print(" + "); + pw.print((irq*100)/totalTime); + pw.print("% irq"); + } + if (softIrq > 0) { + pw.print(" + "); + pw.print((softIrq*100)/totalTime); + pw.print("% softirq"); + } + pw.println(); + } + + private String readFile(String file, char endChar) { + try { + FileInputStream is = new FileInputStream(file); + int len = is.read(mBuffer); + is.close(); + + if (len > 0) { + int i; + for (i=0; i<len; i++) { + if (mBuffer[i] == endChar) { + break; + } + } + return new String(mBuffer, 0, 0, i); + } + } catch (java.io.FileNotFoundException e) { + } catch (java.io.IOException e) { + } + return null; + } + + private void getName(Stats st, String cmdlineFile) { + String newName = st.baseName; + if (st.baseName == null || st.baseName.equals("app_process")) { + String cmdName = readFile(cmdlineFile, '\0'); + if (cmdName != null && cmdName.length() > 1) { + newName = cmdName; + int i = newName.lastIndexOf("/"); + if (i > 0 && i < newName.length()-1) { + newName = newName.substring(i+1); + } + } + } + if (st.name == null || !newName.equals(st.name)) { + st.name = newName; + st.nameWidth = onMeasureProcessName(st.name); + } + } +} + |