Andreas Gampe | 37e5fdc | 2016-07-12 22:42:41 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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.server.pm; |
| 18 | |
| 19 | import android.util.ArrayMap; |
| 20 | import android.util.AtomicFile; |
| 21 | import android.util.Log; |
| 22 | |
| 23 | import com.android.internal.util.FastPrintWriter; |
| 24 | import com.android.internal.util.IndentingPrintWriter; |
| 25 | |
| 26 | import libcore.io.IoUtils; |
| 27 | |
| 28 | import java.io.BufferedReader; |
| 29 | import java.io.File; |
| 30 | import java.io.FileNotFoundException; |
| 31 | import java.io.FileOutputStream; |
| 32 | import java.io.IOException; |
| 33 | import java.io.InputStreamReader; |
| 34 | import java.io.OutputStreamWriter; |
| 35 | import java.io.Reader; |
| 36 | import java.io.Writer; |
| 37 | import java.util.HashMap; |
| 38 | import java.util.Map; |
| 39 | |
| 40 | /** |
| 41 | * A class that collects, serializes and deserializes compiler-related statistics on a |
| 42 | * per-package per-code-path basis. |
| 43 | * |
| 44 | * Currently used to track compile times. |
| 45 | */ |
| 46 | class CompilerStats extends AbstractStatsBase<Void> { |
| 47 | |
| 48 | private final static String COMPILER_STATS_VERSION_HEADER = "PACKAGE_MANAGER__COMPILER_STATS__"; |
| 49 | private final static int COMPILER_STATS_VERSION = 1; |
| 50 | |
| 51 | /** |
| 52 | * Class to collect all stats pertaining to one package. |
| 53 | */ |
| 54 | static class PackageStats { |
| 55 | |
| 56 | private final String packageName; |
| 57 | |
| 58 | /** |
| 59 | * This map stores compile-times for all code paths in the package. The value |
| 60 | * is in milliseconds. |
| 61 | */ |
| 62 | private final Map<String, Long> compileTimePerCodePath; |
| 63 | |
| 64 | /** |
| 65 | * @param packageName |
| 66 | */ |
| 67 | public PackageStats(String packageName) { |
| 68 | this.packageName = packageName; |
| 69 | // We expect at least one element in here, but let's make it minimal. |
| 70 | compileTimePerCodePath = new ArrayMap<>(2); |
| 71 | } |
| 72 | |
| 73 | public String getPackageName() { |
| 74 | return packageName; |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Return the recorded compile time for a given code path. Returns |
| 79 | * 0 if there is no recorded time. |
| 80 | */ |
| 81 | public long getCompileTime(String codePath) { |
| 82 | String storagePath = getStoredPathFromCodePath(codePath); |
| 83 | synchronized (compileTimePerCodePath) { |
| 84 | Long l = compileTimePerCodePath.get(storagePath); |
| 85 | if (l == null) { |
| 86 | return 0; |
| 87 | } |
| 88 | return l; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | public void setCompileTime(String codePath, long compileTimeInMs) { |
| 93 | String storagePath = getStoredPathFromCodePath(codePath); |
| 94 | synchronized (compileTimePerCodePath) { |
| 95 | if (compileTimeInMs <= 0) { |
| 96 | compileTimePerCodePath.remove(storagePath); |
| 97 | } else { |
| 98 | compileTimePerCodePath.put(storagePath, compileTimeInMs); |
| 99 | } |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | private static String getStoredPathFromCodePath(String codePath) { |
| 104 | int lastSlash = codePath.lastIndexOf(File.separatorChar); |
| 105 | return codePath.substring(lastSlash + 1); |
| 106 | } |
| 107 | |
| 108 | public void dump(IndentingPrintWriter ipw) { |
| 109 | synchronized (compileTimePerCodePath) { |
| 110 | if (compileTimePerCodePath.size() == 0) { |
| 111 | ipw.println("(No recorded stats)"); |
| 112 | } else { |
| 113 | for (Map.Entry<String, Long> e : compileTimePerCodePath.entrySet()) { |
| 114 | ipw.println(" " + e.getKey() + " - " + e.getValue()); |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | private final Map<String, PackageStats> packageStats; |
| 122 | |
| 123 | public CompilerStats() { |
| 124 | super("package-cstats.list", "CompilerStats_DiskWriter", /* lock */ false); |
| 125 | packageStats = new HashMap<>(); |
| 126 | } |
| 127 | |
| 128 | public PackageStats getPackageStats(String packageName) { |
| 129 | synchronized (packageStats) { |
| 130 | return packageStats.get(packageName); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | public void setPackageStats(String packageName, PackageStats stats) { |
| 135 | synchronized (packageStats) { |
| 136 | packageStats.put(packageName, stats); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | public PackageStats createPackageStats(String packageName) { |
| 141 | synchronized (packageStats) { |
| 142 | PackageStats newStats = new PackageStats(packageName); |
| 143 | packageStats.put(packageName, newStats); |
| 144 | return newStats; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | public PackageStats getOrCreatePackageStats(String packageName) { |
| 149 | synchronized (packageStats) { |
| 150 | PackageStats existingStats = packageStats.get(packageName); |
| 151 | if (existingStats != null) { |
| 152 | return existingStats; |
| 153 | } |
| 154 | |
| 155 | return createPackageStats(packageName); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | public void deletePackageStats(String packageName) { |
| 160 | synchronized (packageStats) { |
| 161 | packageStats.remove(packageName); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | // I/O |
| 166 | |
| 167 | // The encoding is simple: |
| 168 | // |
| 169 | // 1) The first line is a line consisting of the version header and the version number. |
| 170 | // |
| 171 | // 2) The rest of the file is package data. |
| 172 | // 2.1) A package is started by any line not starting with "-"; |
| 173 | // 2.2) Any line starting with "-" is code path data. The format is: |
| 174 | // '-'{code-path}':'{compile-time} |
| 175 | |
| 176 | public void write(Writer out) { |
| 177 | @SuppressWarnings("resource") |
| 178 | FastPrintWriter fpw = new FastPrintWriter(out); |
| 179 | |
| 180 | fpw.print(COMPILER_STATS_VERSION_HEADER); |
| 181 | fpw.println(COMPILER_STATS_VERSION); |
| 182 | |
| 183 | synchronized (packageStats) { |
| 184 | for (PackageStats pkg : packageStats.values()) { |
| 185 | synchronized (pkg.compileTimePerCodePath) { |
| 186 | if (!pkg.compileTimePerCodePath.isEmpty()) { |
| 187 | fpw.println(pkg.getPackageName()); |
| 188 | |
| 189 | for (Map.Entry<String, Long> e : pkg.compileTimePerCodePath.entrySet()) { |
| 190 | fpw.println("-" + e.getKey() + ":" + e.getValue()); |
| 191 | } |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | fpw.flush(); |
| 198 | } |
| 199 | |
| 200 | public boolean read(Reader r) { |
| 201 | synchronized (packageStats) { |
| 202 | // TODO: Could make this a final switch, then we wouldn't have to synchronize over |
| 203 | // the whole reading. |
| 204 | packageStats.clear(); |
| 205 | |
| 206 | try { |
| 207 | BufferedReader in = new BufferedReader(r); |
| 208 | |
| 209 | // Read header, do version check. |
| 210 | String versionLine = in.readLine(); |
| 211 | if (versionLine == null) { |
| 212 | throw new IllegalArgumentException("No version line found."); |
| 213 | } else { |
| 214 | if (!versionLine.startsWith(COMPILER_STATS_VERSION_HEADER)) { |
| 215 | throw new IllegalArgumentException("Invalid version line: " + versionLine); |
| 216 | } |
| 217 | int version = Integer.parseInt( |
| 218 | versionLine.substring(COMPILER_STATS_VERSION_HEADER.length())); |
| 219 | if (version != COMPILER_STATS_VERSION) { |
| 220 | // TODO: Upgrade older formats? For now, just reject and regenerate. |
| 221 | throw new IllegalArgumentException("Unexpected version: " + version); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | // For simpler code, we ignore any data lines before the first package. We |
| 226 | // collect it in a fake package. |
| 227 | PackageStats currentPackage = new PackageStats("fake package"); |
| 228 | |
| 229 | String s = null; |
| 230 | while ((s = in.readLine()) != null) { |
| 231 | if (s.startsWith("-")) { |
| 232 | int colonIndex = s.indexOf(':'); |
| 233 | if (colonIndex == -1 || colonIndex == 1) { |
| 234 | throw new IllegalArgumentException("Could not parse data " + s); |
| 235 | } |
| 236 | String codePath = s.substring(1, colonIndex); |
| 237 | long time = Long.parseLong(s.substring(colonIndex + 1)); |
| 238 | currentPackage.setCompileTime(codePath, time); |
| 239 | } else { |
| 240 | currentPackage = getOrCreatePackageStats(s); |
| 241 | } |
| 242 | } |
| 243 | } catch (Exception e) { |
| 244 | Log.e(PackageManagerService.TAG, "Error parsing compiler stats", e); |
| 245 | return false; |
| 246 | } |
| 247 | |
| 248 | return true; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | void writeNow() { |
| 253 | writeNow(null); |
| 254 | } |
| 255 | |
| 256 | boolean maybeWriteAsync() { |
| 257 | return maybeWriteAsync(null); |
| 258 | } |
| 259 | |
| 260 | @Override |
| 261 | protected void writeInternal(Void data) { |
| 262 | AtomicFile file = getFile(); |
| 263 | FileOutputStream f = null; |
| 264 | |
| 265 | try { |
| 266 | f = file.startWrite(); |
| 267 | OutputStreamWriter osw = new OutputStreamWriter(f); |
Andreas Gampe | 06eb24d | 2016-07-15 18:12:02 -0700 | [diff] [blame] | 268 | write(osw); |
Andreas Gampe | 37e5fdc | 2016-07-12 22:42:41 -0700 | [diff] [blame] | 269 | osw.flush(); |
| 270 | file.finishWrite(f); |
| 271 | } catch (IOException e) { |
| 272 | if (f != null) { |
| 273 | file.failWrite(f); |
| 274 | } |
| 275 | Log.e(PackageManagerService.TAG, "Failed to write compiler stats", e); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | void read() { |
| 280 | read((Void)null); |
| 281 | } |
| 282 | |
| 283 | @Override |
| 284 | protected void readInternal(Void data) { |
| 285 | AtomicFile file = getFile(); |
| 286 | BufferedReader in = null; |
| 287 | try { |
| 288 | in = new BufferedReader(new InputStreamReader(file.openRead())); |
| 289 | read(in); |
| 290 | } catch (FileNotFoundException expected) { |
| 291 | } finally { |
| 292 | IoUtils.closeQuietly(in); |
| 293 | } |
| 294 | } |
| 295 | } |