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The Android Open Source Project
2009-03-03 18:28:45 -08:00
parent 076357b856
commit d83a98f4ce
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services/java/com/android/server/ProcessStats.java
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/*
* 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);
}
}
}