| /* |
| * Copyright (C) 2014 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 static com.android.server.pm.PackageManagerService.DEBUG_DEXOPT; |
| |
| import android.app.job.JobInfo; |
| import android.app.job.JobParameters; |
| import android.app.job.JobScheduler; |
| import android.app.job.JobService; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.os.BatteryManager; |
| import android.os.Environment; |
| import android.os.ServiceManager; |
| import android.os.SystemProperties; |
| import android.os.storage.StorageManager; |
| import android.util.ArraySet; |
| import android.util.Log; |
| |
| import com.android.server.pm.dex.DexManager; |
| import com.android.server.LocalServices; |
| import com.android.server.PinnerService; |
| import com.android.server.pm.dex.DexoptOptions; |
| |
| import java.io.File; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * {@hide} |
| */ |
| public class BackgroundDexOptService extends JobService { |
| private static final String TAG = "BackgroundDexOptService"; |
| |
| private static final boolean DEBUG = false; |
| |
| private static final int JOB_IDLE_OPTIMIZE = 800; |
| private static final int JOB_POST_BOOT_UPDATE = 801; |
| |
| private static final long IDLE_OPTIMIZATION_PERIOD = DEBUG |
| ? TimeUnit.MINUTES.toMillis(1) |
| : TimeUnit.DAYS.toMillis(1); |
| |
| private static ComponentName sDexoptServiceName = new ComponentName( |
| "android", |
| BackgroundDexOptService.class.getName()); |
| |
| // Possible return codes of individual optimization steps. |
| |
| // Optimizations finished. All packages were processed. |
| private static final int OPTIMIZE_PROCESSED = 0; |
| // Optimizations should continue. Issued after checking the scheduler, disk space or battery. |
| private static final int OPTIMIZE_CONTINUE = 1; |
| // Optimizations should be aborted. Job scheduler requested it. |
| private static final int OPTIMIZE_ABORT_BY_JOB_SCHEDULER = 2; |
| // Optimizations should be aborted. No space left on device. |
| private static final int OPTIMIZE_ABORT_NO_SPACE_LEFT = 3; |
| |
| // Used for calculating space threshold for downgrading unused apps. |
| private static final int LOW_THRESHOLD_MULTIPLIER_FOR_DOWNGRADE = 2; |
| |
| /** |
| * Set of failed packages remembered across job runs. |
| */ |
| static final ArraySet<String> sFailedPackageNamesPrimary = new ArraySet<String>(); |
| static final ArraySet<String> sFailedPackageNamesSecondary = new ArraySet<String>(); |
| |
| /** |
| * Atomics set to true if the JobScheduler requests an abort. |
| */ |
| private final AtomicBoolean mAbortPostBootUpdate = new AtomicBoolean(false); |
| private final AtomicBoolean mAbortIdleOptimization = new AtomicBoolean(false); |
| |
| /** |
| * Atomic set to true if one job should exit early because another job was started. |
| */ |
| private final AtomicBoolean mExitPostBootUpdate = new AtomicBoolean(false); |
| |
| private final File mDataDir = Environment.getDataDirectory(); |
| |
| private static final long mDowngradeUnusedAppsThresholdInMillis = |
| getDowngradeUnusedAppsThresholdInMillis(); |
| |
| public static void schedule(Context context) { |
| if (isBackgroundDexoptDisabled()) { |
| return; |
| } |
| |
| JobScheduler js = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE); |
| |
| // Schedule a one-off job which scans installed packages and updates |
| // out-of-date oat files. |
| js.schedule(new JobInfo.Builder(JOB_POST_BOOT_UPDATE, sDexoptServiceName) |
| .setMinimumLatency(TimeUnit.MINUTES.toMillis(1)) |
| .setOverrideDeadline(TimeUnit.MINUTES.toMillis(1)) |
| .build()); |
| |
| // Schedule a daily job which scans installed packages and compiles |
| // those with fresh profiling data. |
| js.schedule(new JobInfo.Builder(JOB_IDLE_OPTIMIZE, sDexoptServiceName) |
| .setRequiresDeviceIdle(true) |
| .setRequiresCharging(true) |
| .setPeriodic(IDLE_OPTIMIZATION_PERIOD) |
| .build()); |
| |
| if (DEBUG_DEXOPT) { |
| Log.i(TAG, "Jobs scheduled"); |
| } |
| } |
| |
| public static void notifyPackageChanged(String packageName) { |
| // The idle maintanance job skips packages which previously failed to |
| // compile. The given package has changed and may successfully compile |
| // now. Remove it from the list of known failing packages. |
| synchronized (sFailedPackageNamesPrimary) { |
| sFailedPackageNamesPrimary.remove(packageName); |
| } |
| synchronized (sFailedPackageNamesSecondary) { |
| sFailedPackageNamesSecondary.remove(packageName); |
| } |
| } |
| |
| // Returns the current battery level as a 0-100 integer. |
| private int getBatteryLevel() { |
| IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); |
| Intent intent = registerReceiver(null, filter); |
| int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1); |
| int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1); |
| |
| if (level < 0 || scale <= 0) { |
| // Battery data unavailable. This should never happen, so assume the worst. |
| return 0; |
| } |
| |
| return (100 * level / scale); |
| } |
| |
| private long getLowStorageThreshold(Context context) { |
| @SuppressWarnings("deprecation") |
| final long lowThreshold = StorageManager.from(context).getStorageLowBytes(mDataDir); |
| if (lowThreshold == 0) { |
| Log.e(TAG, "Invalid low storage threshold"); |
| } |
| |
| return lowThreshold; |
| } |
| |
| private boolean runPostBootUpdate(final JobParameters jobParams, |
| final PackageManagerService pm, final ArraySet<String> pkgs) { |
| if (mExitPostBootUpdate.get()) { |
| // This job has already been superseded. Do not start it. |
| return false; |
| } |
| new Thread("BackgroundDexOptService_PostBootUpdate") { |
| @Override |
| public void run() { |
| postBootUpdate(jobParams, pm, pkgs); |
| } |
| |
| }.start(); |
| return true; |
| } |
| |
| private void postBootUpdate(JobParameters jobParams, PackageManagerService pm, |
| ArraySet<String> pkgs) { |
| // Load low battery threshold from the system config. This is a 0-100 integer. |
| final int lowBatteryThreshold = getResources().getInteger( |
| com.android.internal.R.integer.config_lowBatteryWarningLevel); |
| final long lowThreshold = getLowStorageThreshold(this); |
| |
| mAbortPostBootUpdate.set(false); |
| |
| ArraySet<String> updatedPackages = new ArraySet<>(); |
| for (String pkg : pkgs) { |
| if (mAbortPostBootUpdate.get()) { |
| // JobScheduler requested an early abort. |
| return; |
| } |
| if (mExitPostBootUpdate.get()) { |
| // Different job, which supersedes this one, is running. |
| break; |
| } |
| if (getBatteryLevel() < lowBatteryThreshold) { |
| // Rather bail than completely drain the battery. |
| break; |
| } |
| long usableSpace = mDataDir.getUsableSpace(); |
| if (usableSpace < lowThreshold) { |
| // Rather bail than completely fill up the disk. |
| Log.w(TAG, "Aborting background dex opt job due to low storage: " + |
| usableSpace); |
| break; |
| } |
| |
| if (DEBUG_DEXOPT) { |
| Log.i(TAG, "Updating package " + pkg); |
| } |
| |
| // Update package if needed. Note that there can be no race between concurrent |
| // jobs because PackageDexOptimizer.performDexOpt is synchronized. |
| |
| // checkProfiles is false to avoid merging profiles during boot which |
| // might interfere with background compilation (b/28612421). |
| // Unfortunately this will also means that "pm.dexopt.boot=speed-profile" will |
| // behave differently than "pm.dexopt.bg-dexopt=speed-profile" but that's a |
| // trade-off worth doing to save boot time work. |
| int result = pm.performDexOptWithStatus(new DexoptOptions( |
| pkg, |
| PackageManagerService.REASON_BOOT, |
| DexoptOptions.DEXOPT_BOOT_COMPLETE)); |
| if (result == PackageDexOptimizer.DEX_OPT_PERFORMED) { |
| updatedPackages.add(pkg); |
| } |
| } |
| notifyPinService(updatedPackages); |
| // Ran to completion, so we abandon our timeslice and do not reschedule. |
| jobFinished(jobParams, /* reschedule */ false); |
| } |
| |
| private boolean runIdleOptimization(final JobParameters jobParams, |
| final PackageManagerService pm, final ArraySet<String> pkgs) { |
| new Thread("BackgroundDexOptService_IdleOptimization") { |
| @Override |
| public void run() { |
| int result = idleOptimization(pm, pkgs, BackgroundDexOptService.this); |
| if (result != OPTIMIZE_ABORT_BY_JOB_SCHEDULER) { |
| Log.w(TAG, "Idle optimizations aborted because of space constraints."); |
| // If we didn't abort we ran to completion (or stopped because of space). |
| // Abandon our timeslice and do not reschedule. |
| jobFinished(jobParams, /* reschedule */ false); |
| } |
| } |
| }.start(); |
| return true; |
| } |
| |
| // Optimize the given packages and return the optimization result (one of the OPTIMIZE_* codes). |
| private int idleOptimization(PackageManagerService pm, ArraySet<String> pkgs, |
| Context context) { |
| Log.i(TAG, "Performing idle optimizations"); |
| // If post-boot update is still running, request that it exits early. |
| mExitPostBootUpdate.set(true); |
| mAbortIdleOptimization.set(false); |
| |
| long lowStorageThreshold = getLowStorageThreshold(context); |
| // Optimize primary apks. |
| int result = optimizePackages(pm, pkgs, lowStorageThreshold, /*is_for_primary_dex*/ true, |
| sFailedPackageNamesPrimary); |
| |
| if (result == OPTIMIZE_ABORT_BY_JOB_SCHEDULER) { |
| return result; |
| } |
| |
| if (SystemProperties.getBoolean("dalvik.vm.dexopt.secondary", false)) { |
| result = reconcileSecondaryDexFiles(pm.getDexManager()); |
| if (result == OPTIMIZE_ABORT_BY_JOB_SCHEDULER) { |
| return result; |
| } |
| |
| result = optimizePackages(pm, pkgs, lowStorageThreshold, /*is_for_primary_dex*/ false, |
| sFailedPackageNamesSecondary); |
| } |
| return result; |
| } |
| |
| private int optimizePackages(PackageManagerService pm, ArraySet<String> pkgs, |
| long lowStorageThreshold, boolean is_for_primary_dex, |
| ArraySet<String> failedPackageNames) { |
| ArraySet<String> updatedPackages = new ArraySet<>(); |
| Set<String> unusedPackages = pm.getUnusedPackages(mDowngradeUnusedAppsThresholdInMillis); |
| // Only downgrade apps when space is low on device. |
| // Threshold is selected above the lowStorageThreshold so that we can pro-actively clean |
| // up disk before user hits the actual lowStorageThreshold. |
| final long lowStorageThresholdForDowngrade = LOW_THRESHOLD_MULTIPLIER_FOR_DOWNGRADE * |
| lowStorageThreshold; |
| boolean shouldDowngrade = shouldDowngrade(lowStorageThresholdForDowngrade); |
| for (String pkg : pkgs) { |
| int abort_code = abortIdleOptimizations(lowStorageThreshold); |
| if (abort_code == OPTIMIZE_ABORT_BY_JOB_SCHEDULER) { |
| return abort_code; |
| } |
| |
| synchronized (failedPackageNames) { |
| if (failedPackageNames.contains(pkg)) { |
| // Skip previously failing package |
| continue; |
| } |
| } |
| |
| int reason; |
| boolean downgrade; |
| // Downgrade unused packages. |
| if (unusedPackages.contains(pkg) && shouldDowngrade) { |
| // This applies for system apps or if packages location is not a directory, i.e. |
| // monolithic install. |
| if (is_for_primary_dex && !pm.canHaveOatDir(pkg)) { |
| // For apps that don't have the oat directory, instead of downgrading, |
| // remove their compiler artifacts from dalvik cache. |
| pm.deleteOatArtifactsOfPackage(pkg); |
| continue; |
| } else { |
| reason = PackageManagerService.REASON_INACTIVE_PACKAGE_DOWNGRADE; |
| downgrade = true; |
| } |
| } else if (abort_code != OPTIMIZE_ABORT_NO_SPACE_LEFT) { |
| reason = PackageManagerService.REASON_BACKGROUND_DEXOPT; |
| downgrade = false; |
| } else { |
| // can't dexopt because of low space. |
| continue; |
| } |
| |
| synchronized (failedPackageNames) { |
| // Conservatively add package to the list of failing ones in case |
| // performDexOpt never returns. |
| failedPackageNames.add(pkg); |
| } |
| |
| // Optimize package if needed. Note that there can be no race between |
| // concurrent jobs because PackageDexOptimizer.performDexOpt is synchronized. |
| boolean success; |
| int dexoptFlags = |
| DexoptOptions.DEXOPT_CHECK_FOR_PROFILES_UPDATES | |
| DexoptOptions.DEXOPT_BOOT_COMPLETE | |
| (downgrade ? DexoptOptions.DEXOPT_DOWNGRADE : 0); |
| if (is_for_primary_dex) { |
| int result = pm.performDexOptWithStatus(new DexoptOptions(pkg, |
| PackageManagerService.REASON_BACKGROUND_DEXOPT, |
| dexoptFlags)); |
| success = result != PackageDexOptimizer.DEX_OPT_FAILED; |
| if (result == PackageDexOptimizer.DEX_OPT_PERFORMED) { |
| updatedPackages.add(pkg); |
| } |
| } else { |
| success = pm.performDexOpt(new DexoptOptions(pkg, |
| PackageManagerService.REASON_BACKGROUND_DEXOPT, |
| dexoptFlags | DexoptOptions.DEXOPT_ONLY_SECONDARY_DEX)); |
| } |
| if (success) { |
| // Dexopt succeeded, remove package from the list of failing ones. |
| synchronized (failedPackageNames) { |
| failedPackageNames.remove(pkg); |
| } |
| } |
| } |
| notifyPinService(updatedPackages); |
| return OPTIMIZE_PROCESSED; |
| } |
| |
| private int reconcileSecondaryDexFiles(DexManager dm) { |
| // TODO(calin): should we blacklist packages for which we fail to reconcile? |
| for (String p : dm.getAllPackagesWithSecondaryDexFiles()) { |
| if (mAbortIdleOptimization.get()) { |
| return OPTIMIZE_ABORT_BY_JOB_SCHEDULER; |
| } |
| dm.reconcileSecondaryDexFiles(p); |
| } |
| return OPTIMIZE_PROCESSED; |
| } |
| |
| // Evaluate whether or not idle optimizations should continue. |
| private int abortIdleOptimizations(long lowStorageThreshold) { |
| if (mAbortIdleOptimization.get()) { |
| // JobScheduler requested an early abort. |
| return OPTIMIZE_ABORT_BY_JOB_SCHEDULER; |
| } |
| long usableSpace = mDataDir.getUsableSpace(); |
| if (usableSpace < lowStorageThreshold) { |
| // Rather bail than completely fill up the disk. |
| Log.w(TAG, "Aborting background dex opt job due to low storage: " + usableSpace); |
| return OPTIMIZE_ABORT_NO_SPACE_LEFT; |
| } |
| |
| return OPTIMIZE_CONTINUE; |
| } |
| |
| // Evaluate whether apps should be downgraded. |
| private boolean shouldDowngrade(long lowStorageThresholdForDowngrade) { |
| long usableSpace = mDataDir.getUsableSpace(); |
| if (usableSpace < lowStorageThresholdForDowngrade) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Execute the idle optimizations immediately. |
| */ |
| public static boolean runIdleOptimizationsNow(PackageManagerService pm, Context context) { |
| // Create a new object to make sure we don't interfere with the scheduled jobs. |
| // Note that this may still run at the same time with the job scheduled by the |
| // JobScheduler but the scheduler will not be able to cancel it. |
| BackgroundDexOptService bdos = new BackgroundDexOptService(); |
| int result = bdos.idleOptimization(pm, pm.getOptimizablePackages(), context); |
| return result == OPTIMIZE_PROCESSED; |
| } |
| |
| @Override |
| public boolean onStartJob(JobParameters params) { |
| if (DEBUG_DEXOPT) { |
| Log.i(TAG, "onStartJob"); |
| } |
| |
| // NOTE: PackageManagerService.isStorageLow uses a different set of criteria from |
| // the checks above. This check is not "live" - the value is determined by a background |
| // restart with a period of ~1 minute. |
| PackageManagerService pm = (PackageManagerService)ServiceManager.getService("package"); |
| if (pm.isStorageLow()) { |
| if (DEBUG_DEXOPT) { |
| Log.i(TAG, "Low storage, skipping this run"); |
| } |
| return false; |
| } |
| |
| final ArraySet<String> pkgs = pm.getOptimizablePackages(); |
| if (pkgs.isEmpty()) { |
| if (DEBUG_DEXOPT) { |
| Log.i(TAG, "No packages to optimize"); |
| } |
| return false; |
| } |
| |
| boolean result; |
| if (params.getJobId() == JOB_POST_BOOT_UPDATE) { |
| result = runPostBootUpdate(params, pm, pkgs); |
| } else { |
| result = runIdleOptimization(params, pm, pkgs); |
| } |
| |
| return result; |
| } |
| |
| @Override |
| public boolean onStopJob(JobParameters params) { |
| if (DEBUG_DEXOPT) { |
| Log.i(TAG, "onStopJob"); |
| } |
| |
| if (params.getJobId() == JOB_POST_BOOT_UPDATE) { |
| mAbortPostBootUpdate.set(true); |
| } else { |
| mAbortIdleOptimization.set(true); |
| } |
| return false; |
| } |
| |
| private void notifyPinService(ArraySet<String> updatedPackages) { |
| PinnerService pinnerService = LocalServices.getService(PinnerService.class); |
| if (pinnerService != null) { |
| Log.i(TAG, "Pinning optimized code " + updatedPackages); |
| pinnerService.update(updatedPackages); |
| } |
| } |
| |
| private static long getDowngradeUnusedAppsThresholdInMillis() { |
| final String sysPropKey = "pm.dexopt.downgrade_after_inactive_days"; |
| String sysPropValue = SystemProperties.get(sysPropKey); |
| if (sysPropValue == null || sysPropValue.isEmpty()) { |
| Log.w(TAG, "SysProp " + sysPropKey + " not set"); |
| return Long.MAX_VALUE; |
| } |
| return TimeUnit.DAYS.toMillis(Long.parseLong(sysPropValue)); |
| } |
| |
| private static boolean isBackgroundDexoptDisabled() { |
| return SystemProperties.getBoolean("pm.dexopt.disable_bg_dexopt" /* key */, |
| false /* default */); |
| } |
| } |