Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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.am; |
| 18 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 19 | import static android.os.Process.THREAD_PRIORITY_FOREGROUND; |
| 20 | import static android.provider.DeviceConfig.ActivityManager.KEY_COMPACT_ACTION_1; |
| 21 | import static android.provider.DeviceConfig.ActivityManager.KEY_COMPACT_ACTION_2; |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 22 | import static android.provider.DeviceConfig.ActivityManager.KEY_COMPACT_STATSD_SAMPLE_RATE; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 23 | import static android.provider.DeviceConfig.ActivityManager.KEY_COMPACT_THROTTLE_1; |
| 24 | import static android.provider.DeviceConfig.ActivityManager.KEY_COMPACT_THROTTLE_2; |
| 25 | import static android.provider.DeviceConfig.ActivityManager.KEY_COMPACT_THROTTLE_3; |
| 26 | import static android.provider.DeviceConfig.ActivityManager.KEY_COMPACT_THROTTLE_4; |
| 27 | import static android.provider.DeviceConfig.ActivityManager.KEY_USE_COMPACTION; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 28 | |
| 29 | import android.app.ActivityManager; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 30 | import android.app.ActivityThread; |
Ben Murdoch | fdc5593 | 2019-01-30 10:43:15 +0000 | [diff] [blame] | 31 | import android.os.Debug; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 32 | import android.os.Handler; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 33 | import android.os.Message; |
| 34 | import android.os.Process; |
| 35 | import android.os.SystemClock; |
| 36 | import android.os.Trace; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 37 | import android.provider.DeviceConfig; |
| 38 | import android.provider.DeviceConfig.OnPropertyChangedListener; |
| 39 | import android.text.TextUtils; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 40 | import android.util.EventLog; |
| 41 | import android.util.StatsLog; |
| 42 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 43 | import com.android.internal.annotations.GuardedBy; |
| 44 | import com.android.internal.annotations.VisibleForTesting; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 45 | import com.android.server.ServiceThread; |
| 46 | |
| 47 | import java.io.FileOutputStream; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 48 | import java.io.PrintWriter; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 49 | import java.util.ArrayList; |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 50 | import java.util.Random; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 51 | |
| 52 | public final class AppCompactor { |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 53 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 54 | // Phenotype sends int configurations and we map them to the strings we'll use on device, |
| 55 | // preventing a weird string value entering the kernel. |
| 56 | private static final int COMPACT_ACTION_FILE_FLAG = 1; |
| 57 | private static final int COMPACT_ACTION_ANON_FLAG = 2; |
| 58 | private static final int COMPACT_ACTION_FULL_FLAG = 3; |
Tim Murray | f96451b | 2019-01-30 18:36:48 -0800 | [diff] [blame] | 59 | private static final int COMPACT_ACTION_NONE_FLAG = 4; |
| 60 | private static final String COMPACT_ACTION_NONE = ""; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 61 | private static final String COMPACT_ACTION_FILE = "file"; |
| 62 | private static final String COMPACT_ACTION_ANON = "anon"; |
| 63 | private static final String COMPACT_ACTION_FULL = "all"; |
| 64 | |
| 65 | // Defaults for phenotype flags. |
| 66 | @VisibleForTesting static final Boolean DEFAULT_USE_COMPACTION = false; |
| 67 | @VisibleForTesting static final int DEFAULT_COMPACT_ACTION_1 = COMPACT_ACTION_FILE_FLAG; |
| 68 | @VisibleForTesting static final int DEFAULT_COMPACT_ACTION_2 = COMPACT_ACTION_FULL_FLAG; |
| 69 | @VisibleForTesting static final long DEFAULT_COMPACT_THROTTLE_1 = 5_000; |
| 70 | @VisibleForTesting static final long DEFAULT_COMPACT_THROTTLE_2 = 10_000; |
| 71 | @VisibleForTesting static final long DEFAULT_COMPACT_THROTTLE_3 = 500; |
| 72 | @VisibleForTesting static final long DEFAULT_COMPACT_THROTTLE_4 = 10_000; |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 73 | // The sampling rate to push app compaction events into statsd for upload. |
| 74 | @VisibleForTesting static final float DEFAULT_STATSD_SAMPLE_RATE = 0.1f; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 75 | |
| 76 | @VisibleForTesting |
| 77 | interface PropertyChangedCallbackForTest { |
| 78 | void onPropertyChanged(); |
| 79 | } |
| 80 | private PropertyChangedCallbackForTest mTestCallback; |
| 81 | |
| 82 | // Handler constants. |
Tim Murray | bbcbc2c | 2018-12-20 13:30:59 -0800 | [diff] [blame] | 83 | static final int COMPACT_PROCESS_SOME = 1; |
| 84 | static final int COMPACT_PROCESS_FULL = 2; |
| 85 | static final int COMPACT_PROCESS_MSG = 1; |
| 86 | |
| 87 | /** |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 88 | * This thread must be moved to the system background cpuset. |
| 89 | * If that doesn't happen, it's probably going to draw a lot of power. |
| 90 | * However, this has to happen after the first updateOomAdjLocked, because |
| 91 | * that will wipe out the cpuset assignment for system_server threads. |
| 92 | * Accordingly, this is in the AMS constructor. |
| 93 | */ |
| 94 | final ServiceThread mCompactionThread; |
| 95 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 96 | private final ArrayList<ProcessRecord> mPendingCompactionProcesses = |
| 97 | new ArrayList<ProcessRecord>(); |
| 98 | private final ActivityManagerService mAm; |
| 99 | private final OnPropertyChangedListener mOnFlagsChangedListener = |
| 100 | new OnPropertyChangedListener() { |
| 101 | @Override |
| 102 | public void onPropertyChanged(String namespace, String name, String value) { |
| 103 | synchronized (mPhenotypeFlagLock) { |
| 104 | if (KEY_USE_COMPACTION.equals(name)) { |
| 105 | updateUseCompaction(); |
| 106 | } else if (KEY_COMPACT_ACTION_1.equals(name) |
| 107 | || KEY_COMPACT_ACTION_2.equals(name)) { |
| 108 | updateCompactionActions(); |
| 109 | } else if (KEY_COMPACT_THROTTLE_1.equals(name) |
| 110 | || KEY_COMPACT_THROTTLE_2.equals(name) |
| 111 | || KEY_COMPACT_THROTTLE_3.equals(name) |
| 112 | || KEY_COMPACT_THROTTLE_4.equals(name)) { |
| 113 | updateCompactionThrottles(); |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 114 | } else if (KEY_COMPACT_STATSD_SAMPLE_RATE.equals(name)) { |
| 115 | updateStatsdSampleRate(); |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 116 | } |
| 117 | } |
| 118 | if (mTestCallback != null) { |
| 119 | mTestCallback.onPropertyChanged(); |
| 120 | } |
| 121 | } |
| 122 | }; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 123 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 124 | private final Object mPhenotypeFlagLock = new Object(); |
Tim Murray | bbcbc2c | 2018-12-20 13:30:59 -0800 | [diff] [blame] | 125 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 126 | // Configured by phenotype. Updates from the server take effect immediately. |
| 127 | @GuardedBy("mPhenotypeFlagLock") |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 128 | @VisibleForTesting volatile String mCompactActionSome = |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 129 | compactActionIntToString(DEFAULT_COMPACT_ACTION_1); |
| 130 | @GuardedBy("mPhenotypeFlagLock") |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 131 | @VisibleForTesting volatile String mCompactActionFull = |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 132 | compactActionIntToString(DEFAULT_COMPACT_ACTION_2); |
| 133 | @GuardedBy("mPhenotypeFlagLock") |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 134 | @VisibleForTesting volatile long mCompactThrottleSomeSome = DEFAULT_COMPACT_THROTTLE_1; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 135 | @GuardedBy("mPhenotypeFlagLock") |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 136 | @VisibleForTesting volatile long mCompactThrottleSomeFull = DEFAULT_COMPACT_THROTTLE_2; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 137 | @GuardedBy("mPhenotypeFlagLock") |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 138 | @VisibleForTesting volatile long mCompactThrottleFullSome = DEFAULT_COMPACT_THROTTLE_3; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 139 | @GuardedBy("mPhenotypeFlagLock") |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 140 | @VisibleForTesting volatile long mCompactThrottleFullFull = DEFAULT_COMPACT_THROTTLE_4; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 141 | @GuardedBy("mPhenotypeFlagLock") |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 142 | private volatile boolean mUseCompaction = DEFAULT_USE_COMPACTION; |
| 143 | |
| 144 | private final Random mRandom = new Random(); |
| 145 | @GuardedBy("mPhenotypeFlagLock") |
| 146 | @VisibleForTesting volatile float mStatsdSampleRate = DEFAULT_STATSD_SAMPLE_RATE; |
Tim Murray | bbcbc2c | 2018-12-20 13:30:59 -0800 | [diff] [blame] | 147 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 148 | // Handler on which compaction runs. |
| 149 | private Handler mCompactionHandler; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 150 | |
| 151 | public AppCompactor(ActivityManagerService am) { |
| 152 | mAm = am; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 153 | mCompactionThread = new ServiceThread("CompactionThread", |
| 154 | THREAD_PRIORITY_FOREGROUND, true); |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 155 | } |
| 156 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 157 | @VisibleForTesting |
| 158 | AppCompactor(ActivityManagerService am, PropertyChangedCallbackForTest callback) { |
| 159 | this(am); |
| 160 | mTestCallback = callback; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Reads phenotype config to determine whether app compaction is enabled or not and |
| 165 | * starts the background thread if necessary. |
| 166 | */ |
| 167 | public void init() { |
| 168 | DeviceConfig.addOnPropertyChangedListener(DeviceConfig.ActivityManager.NAMESPACE, |
| 169 | ActivityThread.currentApplication().getMainExecutor(), mOnFlagsChangedListener); |
| 170 | synchronized (mPhenotypeFlagLock) { |
| 171 | updateUseCompaction(); |
| 172 | updateCompactionActions(); |
| 173 | updateCompactionThrottles(); |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 174 | updateStatsdSampleRate(); |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 175 | } |
Tim Murray | 0a796c1 | 2019-02-05 13:03:16 -0800 | [diff] [blame] | 176 | Process.setThreadGroupAndCpuset(mCompactionThread.getThreadId(), |
| 177 | Process.THREAD_GROUP_SYSTEM); |
| 178 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Returns whether compaction is enabled. |
| 183 | */ |
| 184 | public boolean useCompaction() { |
| 185 | synchronized (mPhenotypeFlagLock) { |
| 186 | return mUseCompaction; |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | @GuardedBy("mAm") |
| 191 | void dump(PrintWriter pw) { |
| 192 | pw.println("AppCompactor settings"); |
| 193 | synchronized (mPhenotypeFlagLock) { |
| 194 | pw.println(" " + KEY_USE_COMPACTION + "=" + mUseCompaction); |
| 195 | pw.println(" " + KEY_COMPACT_ACTION_1 + "=" + mCompactActionSome); |
| 196 | pw.println(" " + KEY_COMPACT_ACTION_2 + "=" + mCompactActionFull); |
| 197 | pw.println(" " + KEY_COMPACT_THROTTLE_1 + "=" + mCompactThrottleSomeSome); |
| 198 | pw.println(" " + KEY_COMPACT_THROTTLE_2 + "=" + mCompactThrottleSomeFull); |
| 199 | pw.println(" " + KEY_COMPACT_THROTTLE_3 + "=" + mCompactThrottleFullSome); |
| 200 | pw.println(" " + KEY_COMPACT_THROTTLE_4 + "=" + mCompactThrottleFullFull); |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 201 | pw.println(" " + KEY_COMPACT_STATSD_SAMPLE_RATE + "=" + mStatsdSampleRate); |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 202 | } |
| 203 | } |
| 204 | |
| 205 | @GuardedBy("mAm") |
| 206 | void compactAppSome(ProcessRecord app) { |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 207 | app.reqCompactAction = COMPACT_PROCESS_SOME; |
| 208 | mPendingCompactionProcesses.add(app); |
| 209 | mCompactionHandler.sendMessage( |
| 210 | mCompactionHandler.obtainMessage( |
| 211 | COMPACT_PROCESS_MSG, app.curAdj, app.setProcState)); |
| 212 | } |
| 213 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 214 | @GuardedBy("mAm") |
| 215 | void compactAppFull(ProcessRecord app) { |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 216 | app.reqCompactAction = COMPACT_PROCESS_FULL; |
| 217 | mPendingCompactionProcesses.add(app); |
| 218 | mCompactionHandler.sendMessage( |
| 219 | mCompactionHandler.obtainMessage( |
| 220 | COMPACT_PROCESS_MSG, app.curAdj, app.setProcState)); |
| 221 | |
| 222 | } |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 223 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 224 | /** |
| 225 | * Reads the flag value from DeviceConfig to determine whether app compaction |
| 226 | * should be enabled, and starts/stops the compaction thread as needed. |
| 227 | */ |
| 228 | @GuardedBy("mPhenotypeFlagLock") |
| 229 | private void updateUseCompaction() { |
| 230 | String useCompactionFlag = |
| 231 | DeviceConfig.getProperty(DeviceConfig.ActivityManager.NAMESPACE, |
| 232 | KEY_USE_COMPACTION); |
| 233 | mUseCompaction = TextUtils.isEmpty(useCompactionFlag) |
| 234 | ? DEFAULT_USE_COMPACTION : Boolean.parseBoolean(useCompactionFlag); |
| 235 | if (mUseCompaction && !mCompactionThread.isAlive()) { |
| 236 | mCompactionThread.start(); |
| 237 | mCompactionHandler = new MemCompactionHandler(); |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | @GuardedBy("mPhenotypeFlagLock") |
| 242 | private void updateCompactionActions() { |
| 243 | String compactAction1Flag = |
| 244 | DeviceConfig.getProperty(DeviceConfig.ActivityManager.NAMESPACE, |
| 245 | KEY_COMPACT_ACTION_1); |
| 246 | String compactAction2Flag = |
| 247 | DeviceConfig.getProperty(DeviceConfig.ActivityManager.NAMESPACE, |
| 248 | KEY_COMPACT_ACTION_2); |
| 249 | |
| 250 | int compactAction1 = DEFAULT_COMPACT_ACTION_1; |
| 251 | try { |
| 252 | compactAction1 = TextUtils.isEmpty(compactAction1Flag) |
| 253 | ? DEFAULT_COMPACT_ACTION_1 : Integer.parseInt(compactAction1Flag); |
| 254 | } catch (NumberFormatException e) { |
| 255 | // Do nothing, leave default. |
| 256 | } |
| 257 | |
| 258 | int compactAction2 = DEFAULT_COMPACT_ACTION_2; |
| 259 | try { |
| 260 | compactAction2 = TextUtils.isEmpty(compactAction2Flag) |
| 261 | ? DEFAULT_COMPACT_ACTION_2 : Integer.parseInt(compactAction2Flag); |
| 262 | } catch (NumberFormatException e) { |
| 263 | // Do nothing, leave default. |
| 264 | } |
| 265 | |
| 266 | mCompactActionSome = compactActionIntToString(compactAction1); |
| 267 | mCompactActionFull = compactActionIntToString(compactAction2); |
| 268 | } |
| 269 | |
| 270 | @GuardedBy("mPhenotypeFlagLock") |
| 271 | private void updateCompactionThrottles() { |
| 272 | boolean useThrottleDefaults = false; |
| 273 | String throttleSomeSomeFlag = |
| 274 | DeviceConfig.getProperty(DeviceConfig.ActivityManager.NAMESPACE, |
| 275 | KEY_COMPACT_THROTTLE_1); |
| 276 | String throttleSomeFullFlag = |
| 277 | DeviceConfig.getProperty(DeviceConfig.ActivityManager.NAMESPACE, |
| 278 | KEY_COMPACT_THROTTLE_2); |
| 279 | String throttleFullSomeFlag = |
| 280 | DeviceConfig.getProperty(DeviceConfig.ActivityManager.NAMESPACE, |
| 281 | KEY_COMPACT_THROTTLE_3); |
| 282 | String throttleFullFullFlag = |
| 283 | DeviceConfig.getProperty(DeviceConfig.ActivityManager.NAMESPACE, |
| 284 | KEY_COMPACT_THROTTLE_4); |
| 285 | |
| 286 | if (TextUtils.isEmpty(throttleSomeSomeFlag) || TextUtils.isEmpty(throttleSomeFullFlag) |
| 287 | || TextUtils.isEmpty(throttleFullSomeFlag) |
| 288 | || TextUtils.isEmpty(throttleFullFullFlag)) { |
| 289 | // Set defaults for all if any are not set. |
| 290 | useThrottleDefaults = true; |
| 291 | } else { |
| 292 | try { |
| 293 | mCompactThrottleSomeSome = Integer.parseInt(throttleSomeSomeFlag); |
| 294 | mCompactThrottleSomeFull = Integer.parseInt(throttleSomeFullFlag); |
| 295 | mCompactThrottleFullSome = Integer.parseInt(throttleFullSomeFlag); |
| 296 | mCompactThrottleFullFull = Integer.parseInt(throttleFullFullFlag); |
| 297 | } catch (NumberFormatException e) { |
| 298 | useThrottleDefaults = true; |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | if (useThrottleDefaults) { |
| 303 | mCompactThrottleSomeSome = DEFAULT_COMPACT_THROTTLE_1; |
| 304 | mCompactThrottleSomeFull = DEFAULT_COMPACT_THROTTLE_2; |
| 305 | mCompactThrottleFullSome = DEFAULT_COMPACT_THROTTLE_3; |
| 306 | mCompactThrottleFullFull = DEFAULT_COMPACT_THROTTLE_4; |
| 307 | } |
| 308 | } |
| 309 | |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 310 | @GuardedBy("mPhenotypeFlagLock") |
| 311 | private void updateStatsdSampleRate() { |
| 312 | String sampleRateFlag = DeviceConfig.getProperty(DeviceConfig.ActivityManager.NAMESPACE, |
| 313 | KEY_COMPACT_STATSD_SAMPLE_RATE); |
| 314 | try { |
| 315 | mStatsdSampleRate = TextUtils.isEmpty(sampleRateFlag) |
| 316 | ? DEFAULT_STATSD_SAMPLE_RATE : Float.parseFloat(sampleRateFlag); |
| 317 | } catch (NumberFormatException e) { |
| 318 | mStatsdSampleRate = DEFAULT_STATSD_SAMPLE_RATE; |
| 319 | } |
| 320 | mStatsdSampleRate = Math.min(1.0f, Math.max(0.0f, mStatsdSampleRate)); |
| 321 | } |
| 322 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 323 | @VisibleForTesting |
| 324 | static String compactActionIntToString(int action) { |
| 325 | switch(action) { |
Tim Murray | f96451b | 2019-01-30 18:36:48 -0800 | [diff] [blame] | 326 | case COMPACT_ACTION_NONE_FLAG: |
| 327 | return COMPACT_ACTION_NONE; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 328 | case COMPACT_ACTION_FILE_FLAG: |
| 329 | return COMPACT_ACTION_FILE; |
| 330 | case COMPACT_ACTION_ANON_FLAG: |
| 331 | return COMPACT_ACTION_ANON; |
| 332 | case COMPACT_ACTION_FULL_FLAG: |
| 333 | return COMPACT_ACTION_FULL; |
| 334 | default: |
Tim Murray | f96451b | 2019-01-30 18:36:48 -0800 | [diff] [blame] | 335 | return COMPACT_ACTION_NONE; |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 336 | } |
| 337 | } |
| 338 | |
| 339 | private final class MemCompactionHandler extends Handler { |
| 340 | private MemCompactionHandler() { |
| 341 | super(mCompactionThread.getLooper()); |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | @Override |
| 345 | public void handleMessage(Message msg) { |
| 346 | switch (msg.what) { |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 347 | case COMPACT_PROCESS_MSG: { |
| 348 | long start = SystemClock.uptimeMillis(); |
| 349 | ProcessRecord proc; |
| 350 | int pid; |
| 351 | String action; |
| 352 | final String name; |
| 353 | int pendingAction, lastCompactAction; |
| 354 | long lastCompactTime; |
| 355 | synchronized (mAm) { |
| 356 | proc = mPendingCompactionProcesses.remove(0); |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 357 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 358 | // don't compact if the process has returned to perceptible |
| 359 | if (proc.setAdj <= ProcessList.PERCEPTIBLE_APP_ADJ) { |
| 360 | return; |
| 361 | } |
| 362 | |
| 363 | pid = proc.pid; |
| 364 | name = proc.processName; |
| 365 | pendingAction = proc.reqCompactAction; |
| 366 | lastCompactAction = proc.lastCompactAction; |
| 367 | lastCompactTime = proc.lastCompactTime; |
| 368 | } |
| 369 | |
| 370 | if (pid == 0) { |
| 371 | // not a real process, either one being launched or one being killed |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 372 | return; |
| 373 | } |
| 374 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 375 | // basic throttling |
| 376 | // use the Phenotype flag knobs to determine whether current/prevous |
| 377 | // compaction combo should be throtted or not |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 378 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 379 | // Note that we explicitly don't take mPhenotypeFlagLock here as the flags |
| 380 | // should very seldom change, and taking the risk of using the wrong action is |
| 381 | // preferable to taking the lock for every single compaction action. |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 382 | if (pendingAction == COMPACT_PROCESS_SOME) { |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 383 | if ((lastCompactAction == COMPACT_PROCESS_SOME |
| 384 | && (start - lastCompactTime < mCompactThrottleSomeSome)) |
| 385 | || (lastCompactAction == COMPACT_PROCESS_FULL |
| 386 | && (start - lastCompactTime |
| 387 | < mCompactThrottleSomeFull))) { |
| 388 | return; |
| 389 | } |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 390 | } else { |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 391 | if ((lastCompactAction == COMPACT_PROCESS_SOME |
| 392 | && (start - lastCompactTime < mCompactThrottleFullSome)) |
| 393 | || (lastCompactAction == COMPACT_PROCESS_FULL |
| 394 | && (start - lastCompactTime |
| 395 | < mCompactThrottleFullFull))) { |
| 396 | return; |
| 397 | } |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 398 | } |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 399 | |
| 400 | if (pendingAction == COMPACT_PROCESS_SOME) { |
| 401 | action = mCompactActionSome; |
| 402 | } else { |
| 403 | action = mCompactActionFull; |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 404 | } |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 405 | |
Tim Murray | f96451b | 2019-01-30 18:36:48 -0800 | [diff] [blame] | 406 | if (action.equals(COMPACT_ACTION_NONE)) { |
| 407 | return; |
| 408 | } |
| 409 | |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 410 | try { |
| 411 | Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "Compact " |
| 412 | + ((pendingAction == COMPACT_PROCESS_SOME) ? "some" : "full") |
| 413 | + ": " + name); |
Ben Murdoch | fdc5593 | 2019-01-30 10:43:15 +0000 | [diff] [blame] | 414 | long zramFreeKbBefore = Debug.getZramFreeKb(); |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 415 | long[] rssBefore = Process.getRss(pid); |
| 416 | FileOutputStream fos = new FileOutputStream("/proc/" + pid + "/reclaim"); |
| 417 | fos.write(action.getBytes()); |
| 418 | fos.close(); |
| 419 | long[] rssAfter = Process.getRss(pid); |
| 420 | long end = SystemClock.uptimeMillis(); |
| 421 | long time = end - start; |
Ben Murdoch | fdc5593 | 2019-01-30 10:43:15 +0000 | [diff] [blame] | 422 | long zramFreeKbAfter = Debug.getZramFreeKb(); |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 423 | EventLog.writeEvent(EventLogTags.AM_COMPACT, pid, name, action, |
| 424 | rssBefore[0], rssBefore[1], rssBefore[2], rssBefore[3], |
| 425 | rssAfter[0], rssAfter[1], rssAfter[2], rssAfter[3], time, |
Ben Murdoch | fdc5593 | 2019-01-30 10:43:15 +0000 | [diff] [blame] | 426 | lastCompactAction, lastCompactTime, msg.arg1, msg.arg2, |
| 427 | zramFreeKbBefore, zramFreeKbAfter); |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 428 | // Note that as above not taking mPhenoTypeFlagLock here to avoid locking |
| 429 | // on every single compaction for a flag that will seldom change and the |
| 430 | // impact of reading the wrong value here is low. |
| 431 | if (mRandom.nextFloat() < mStatsdSampleRate) { |
| 432 | StatsLog.write(StatsLog.APP_COMPACTED, pid, name, pendingAction, |
| 433 | rssBefore[0], rssBefore[1], rssBefore[2], rssBefore[3], |
| 434 | rssAfter[0], rssAfter[1], rssAfter[2], rssAfter[3], time, |
| 435 | lastCompactAction, lastCompactTime, msg.arg1, |
Ben Murdoch | fdc5593 | 2019-01-30 10:43:15 +0000 | [diff] [blame] | 436 | ActivityManager.processStateAmToProto(msg.arg2), |
| 437 | zramFreeKbBefore, zramFreeKbAfter); |
Ben Murdoch | 2384df7 | 2019-01-28 16:13:55 +0000 | [diff] [blame] | 438 | } |
Ben Murdoch | c26a5a8 | 2019-01-16 10:05:58 +0000 | [diff] [blame] | 439 | synchronized (mAm) { |
| 440 | proc.lastCompactTime = end; |
| 441 | proc.lastCompactAction = pendingAction; |
| 442 | } |
| 443 | Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER); |
| 444 | } catch (Exception e) { |
| 445 | // nothing to do, presumably the process died |
| 446 | Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER); |
| 447 | } |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 448 | } |
| 449 | } |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 450 | } |
| 451 | } |
Tim Murray | 1cdbd1e | 2018-12-18 15:18:33 -0800 | [diff] [blame] | 452 | } |