Frameworks/base: Add compiler stats to Package Manager (723bbd88) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/pm/AbstractStatsBase.java

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		/*
		* Copyright (C) 2016 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.pm;

		import android.os.Environment;
		import android.os.SystemClock;
		import android.util.AtomicFile;

		import java.io.File;
		import java.util.concurrent.atomic.AtomicBoolean;
		import java.util.concurrent.atomic.AtomicLong;

		/**
		* A simple base class for statistics that need to be saved/restored from a dedicated file. This
		* class provides a base implementation that:
		* <ul>
		* <li>Provide an AtomicFile to the actual read/write code
		* <li>A background-thread write and a synchronous write
		* <li>Write-limiting for the background-thread (by default writes are at least 30 minutes apart)
		* <li>Can lock on the provided data object before writing
		* </ul>
		* For completion, a subclass needs to implement actual {@link #writeInternal(Object) writing} and
		* {@link #readInternal(Object) reading}.
		*/
		public abstract class AbstractStatsBase<T> {

		private static final int WRITE_INTERVAL_MS =
		(PackageManagerService.DEBUG_DEXOPT) ? 0 : 30601000;
		private final Object mFileLock = new Object();
		private final AtomicLong mLastTimeWritten = new AtomicLong(0);
		private final AtomicBoolean mBackgroundWriteRunning = new AtomicBoolean(false);
		private final String mFileName;
		private final String mBackgroundThreadName;
		private final boolean mLock;

		protected AbstractStatsBase(String fileName, String threadName, boolean lock) {
		mFileName = fileName;
		mBackgroundThreadName = threadName;
		mLock = lock;
		}

		protected AtomicFile getFile() {
		File dataDir = Environment.getDataDirectory();
		File systemDir = new File(dataDir, "system");
		File fname = new File(systemDir, mFileName);
		return new AtomicFile(fname);
		}

		void writeNow(final T data) {
		writeImpl(data);
		mLastTimeWritten.set(SystemClock.elapsedRealtime());
		}

		boolean maybeWriteAsync(final T data) {
		if (SystemClock.elapsedRealtime() - mLastTimeWritten.get() < WRITE_INTERVAL_MS
		&& !PackageManagerService.DEBUG_DEXOPT) {
		return false;
		}

		if (mBackgroundWriteRunning.compareAndSet(false, true)) {
		new Thread(mBackgroundThreadName) {
		@Override
		public void run() {
		try {
		writeImpl(data);
		mLastTimeWritten.set(SystemClock.elapsedRealtime());
		} finally {
		mBackgroundWriteRunning.set(false);
		}
		}
		}.start();
		return true;
		}

		return false;
		}

		private void writeImpl(T data) {
		if (mLock) {
		synchronized (data) {
		synchronized (mFileLock) {
		writeInternal(data);
		}
		}
		} else {
		synchronized (mFileLock) {
		writeInternal(data);
		}
		}
		}

		protected abstract void writeInternal(T data);

		void read(T data) {
		if (mLock) {
		synchronized (data) {
		synchronized (mFileLock) {
		readInternal(data);
		}
		}
		} else {
		synchronized (mFileLock) {
		readInternal(data);
		}
		}
		// We use the current time as last-written. read() is called on system server startup
		// (current situation), and we want to postpone I/O at boot.
		mLastTimeWritten.set(SystemClock.elapsedRealtime());
		}

		protected abstract void readInternal(T data);
		}

services/core/java/com/android/server/pm/CompilerStats.java

0 → 100644

+294 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 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.pm;

		import android.util.ArrayMap;
		import android.util.AtomicFile;
		import android.util.Log;

		import com.android.internal.util.FastPrintWriter;
		import com.android.internal.util.IndentingPrintWriter;

		import libcore.io.IoUtils;

		import java.io.BufferedReader;
		import java.io.File;
		import java.io.FileNotFoundException;
		import java.io.FileOutputStream;
		import java.io.IOException;
		import java.io.InputStreamReader;
		import java.io.OutputStreamWriter;
		import java.io.Reader;
		import java.io.Writer;
		import java.util.HashMap;
		import java.util.Map;

		/**
		* A class that collects, serializes and deserializes compiler-related statistics on a
		* per-package per-code-path basis.
		*
		* Currently used to track compile times.
		*/
		class CompilerStats extends AbstractStatsBase<Void> {

		private final static String COMPILER_STATS_VERSION_HEADER = "PACKAGE_MANAGER__COMPILER_STATS__";
		private final static int COMPILER_STATS_VERSION = 1;

		/**
		* Class to collect all stats pertaining to one package.
		*/
		static class PackageStats {

		private final String packageName;

		/**
		* This map stores compile-times for all code paths in the package. The value
		* is in milliseconds.
		*/
		private final Map<String, Long> compileTimePerCodePath;

		/**
		* @param packageName
		*/
		public PackageStats(String packageName) {
		this.packageName = packageName;
		// We expect at least one element in here, but let's make it minimal.
		compileTimePerCodePath = new ArrayMap<>(2);
		}

		public String getPackageName() {
		return packageName;
		}

		/**
		* Return the recorded compile time for a given code path. Returns
		* 0 if there is no recorded time.
		*/
		public long getCompileTime(String codePath) {
		String storagePath = getStoredPathFromCodePath(codePath);
		synchronized (compileTimePerCodePath) {
		Long l = compileTimePerCodePath.get(storagePath);
		if (l == null) {
		return 0;
		}
		return l;
		}
		}

		public void setCompileTime(String codePath, long compileTimeInMs) {
		String storagePath = getStoredPathFromCodePath(codePath);
		synchronized (compileTimePerCodePath) {
		if (compileTimeInMs <= 0) {
		compileTimePerCodePath.remove(storagePath);
		} else {
		compileTimePerCodePath.put(storagePath, compileTimeInMs);
		}
		}
		}

		private static String getStoredPathFromCodePath(String codePath) {
		int lastSlash = codePath.lastIndexOf(File.separatorChar);
		return codePath.substring(lastSlash + 1);
		}

		public void dump(IndentingPrintWriter ipw) {
		synchronized (compileTimePerCodePath) {
		if (compileTimePerCodePath.size() == 0) {
		ipw.println("(No recorded stats)");
		} else {
		for (Map.Entry<String, Long> e : compileTimePerCodePath.entrySet()) {
		ipw.println(" " + e.getKey() + " - " + e.getValue());
		}
		}
		}
		}
		}

		private final Map<String, PackageStats> packageStats;

		public CompilerStats() {
		super("package-cstats.list", "CompilerStats_DiskWriter", /* lock */ false);
		packageStats = new HashMap<>();
		}

		public PackageStats getPackageStats(String packageName) {
		synchronized (packageStats) {
		return packageStats.get(packageName);
		}
		}

		public void setPackageStats(String packageName, PackageStats stats) {
		synchronized (packageStats) {
		packageStats.put(packageName, stats);
		}
		}

		public PackageStats createPackageStats(String packageName) {
		synchronized (packageStats) {
		PackageStats newStats = new PackageStats(packageName);
		packageStats.put(packageName, newStats);
		return newStats;
		}
		}

		public PackageStats getOrCreatePackageStats(String packageName) {
		synchronized (packageStats) {
		PackageStats existingStats = packageStats.get(packageName);
		if (existingStats != null) {
		return existingStats;
		}

		return createPackageStats(packageName);
		}
		}

		public void deletePackageStats(String packageName) {
		synchronized (packageStats) {
		packageStats.remove(packageName);
		}
		}

		// I/O

		// The encoding is simple:
		//
		// 1) The first line is a line consisting of the version header and the version number.
		//
		// 2) The rest of the file is package data.
		// 2.1) A package is started by any line not starting with "-";
		// 2.2) Any line starting with "-" is code path data. The format is:
		// '-'{code-path}':'{compile-time}

		public void write(Writer out) {
		@SuppressWarnings("resource")
		FastPrintWriter fpw = new FastPrintWriter(out);

		fpw.print(COMPILER_STATS_VERSION_HEADER);
		fpw.println(COMPILER_STATS_VERSION);

		synchronized (packageStats) {
		for (PackageStats pkg : packageStats.values()) {
		synchronized (pkg.compileTimePerCodePath) {
		if (!pkg.compileTimePerCodePath.isEmpty()) {
		fpw.println(pkg.getPackageName());

		for (Map.Entry<String, Long> e : pkg.compileTimePerCodePath.entrySet()) {
		fpw.println("-" + e.getKey() + ":" + e.getValue());
		}
		}
		}
		}
		}

		fpw.flush();
		}

		public boolean read(Reader r) {
		synchronized (packageStats) {
		// TODO: Could make this a final switch, then we wouldn't have to synchronize over
		// the whole reading.
		packageStats.clear();

		try {
		BufferedReader in = new BufferedReader(r);

		// Read header, do version check.
		String versionLine = in.readLine();
		if (versionLine == null) {
		throw new IllegalArgumentException("No version line found.");
		} else {
		if (!versionLine.startsWith(COMPILER_STATS_VERSION_HEADER)) {
		throw new IllegalArgumentException("Invalid version line: " + versionLine);
		}
		int version = Integer.parseInt(
		versionLine.substring(COMPILER_STATS_VERSION_HEADER.length()));
		if (version != COMPILER_STATS_VERSION) {
		// TODO: Upgrade older formats? For now, just reject and regenerate.
		throw new IllegalArgumentException("Unexpected version: " + version);
		}
		}

		// For simpler code, we ignore any data lines before the first package. We
		// collect it in a fake package.
		PackageStats currentPackage = new PackageStats("fake package");

		String s = null;
		while ((s = in.readLine()) != null) {
		if (s.startsWith("-")) {
		int colonIndex = s.indexOf(':');
		if (colonIndex == -1 \|\| colonIndex == 1) {
		throw new IllegalArgumentException("Could not parse data " + s);
		}
		String codePath = s.substring(1, colonIndex);
		long time = Long.parseLong(s.substring(colonIndex + 1));
		currentPackage.setCompileTime(codePath, time);
		} else {
		currentPackage = getOrCreatePackageStats(s);
		}
		}
		} catch (Exception e) {
		Log.e(PackageManagerService.TAG, "Error parsing compiler stats", e);
		return false;
		}

		return true;
		}
		}

		void writeNow() {
		writeNow(null);
		}

		boolean maybeWriteAsync() {
		return maybeWriteAsync(null);
		}

		@Override
		protected void writeInternal(Void data) {
		AtomicFile file = getFile();
		FileOutputStream f = null;

		try {
		f = file.startWrite();
		OutputStreamWriter osw = new OutputStreamWriter(f);
		osw.flush();
		file.finishWrite(f);
		} catch (IOException e) {
		if (f != null) {
		file.failWrite(f);
		}
		Log.e(PackageManagerService.TAG, "Failed to write compiler stats", e);
		}
		}

		void read() {
		read((Void)null);
		}

		@Override
		protected void readInternal(Void data) {
		AtomicFile file = getFile();
		BufferedReader in = null;
		try {
		in = new BufferedReader(new InputStreamReader(file.openRead()));
		read(in);
		} catch (FileNotFoundException expected) {
		} finally {
		IoUtils.closeQuietly(in);
		}
		}
		}

services/core/java/com/android/server/pm/OtaDexoptService.java

+4 −2

Original line number	Diff line number	Diff line
		@@ -225,7 +225,8 @@ public class OtaDexoptService extends IOtaDexopt.Stub {

		optimizer.performDexOpt(nextPackage, nextPackage.usesLibraryFiles,
		null /* ISAs /, false / checkProfiles */,
		getCompilerFilterForReason(compilationReason));
		getCompilerFilterForReason(compilationReason),
		null /* CompilerStats.PackageStats */);

		mCommandsForCurrentPackage = collectingConnection.commands;
		if (mCommandsForCurrentPackage.isEmpty()) {
		@@ -271,7 +272,8 @@ public class OtaDexoptService extends IOtaDexopt.Stub {
		mPackageManagerService.mInstaller, mPackageManagerService.mInstallLock, mContext);
		optimizer.performDexOpt(nextPackage, nextPackage.usesLibraryFiles, null /* ISAs */,
		false /* checkProfiles */,
		getCompilerFilterForReason(PackageManagerService.REASON_AB_OTA));
		getCompilerFilterForReason(PackageManagerService.REASON_AB_OTA),
		mPackageManagerService.getOrCreateCompilerPackageStats(nextPackage));
		}

		private void moveAbArtifacts(Installer installer) {

services/core/java/com/android/server/pm/PackageDexOptimizer.java

+12 −3

Original line number	Diff line number	Diff line
		@@ -90,7 +90,8 @@ class PackageDexOptimizer {
		* synchronized on {@link #mInstallLock}.
		*/
		int performDexOpt(PackageParser.Package pkg, String[] sharedLibraries,
		String[] instructionSets, boolean checkProfiles, String targetCompilationFilter) {
		String[] instructionSets, boolean checkProfiles, String targetCompilationFilter,
		CompilerStats.PackageStats packageStats) {
		synchronized (mInstallLock) {
		final boolean useLock = mSystemReady;
		if (useLock) {
		@@ -99,7 +100,7 @@ class PackageDexOptimizer {
		}
		try {
		return performDexOptLI(pkg, sharedLibraries, instructionSets, checkProfiles,
		targetCompilationFilter);
		targetCompilationFilter, packageStats);
		} finally {
		if (useLock) {
		mDexoptWakeLock.release();
		@@ -150,7 +151,8 @@ class PackageDexOptimizer {
		}

		private int performDexOptLI(PackageParser.Package pkg, String[] sharedLibraries,
		String[] targetInstructionSets, boolean checkProfiles, String targetCompilerFilter) {
		String[] targetInstructionSets, boolean checkProfiles, String targetCompilerFilter,
		CompilerStats.PackageStats packageStats) {
		final String[] instructionSets = targetInstructionSets != null ?
		targetInstructionSets : getAppDexInstructionSets(pkg.applicationInfo);

		@@ -254,10 +256,17 @@ class PackageDexOptimizer {
		\| DEXOPT_BOOTCOMPLETE);

		try {
		long startTime = System.currentTimeMillis();

		mInstaller.dexopt(path, sharedGid, pkg.packageName, dexCodeInstructionSet,
		dexoptNeeded, oatDir, dexFlags, targetCompilerFilter, pkg.volumeUuid,
		sharedLibrariesPath);
		performedDexOpt = true;

		if (packageStats != null) {
		long endTime = System.currentTimeMillis();
		packageStats.setCompileTime(path, (int)(endTime - startTime));
		}
		} catch (InstallerException e) {
		Slog.w(TAG, "Failed to dexopt", e);
		successfulDexOpt = false;

services/core/java/com/android/server/pm/PackageManagerService.java

+69 −210

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