Add smart idle maintenance service (8fb49c78) · Commits · e / os / android_frameworks_base

core/res/AndroidManifest.xml

+5 −0

Original line number	Diff line number	Diff line
		@@ -6234,6 +6234,11 @@
		android:permission="android.permission.BIND_JOB_SERVICE" >
		</service>

		<service android:name="com.android.server.SmartStorageMaintIdler"
		android:exported="true"
		android:permission="android.permission.BIND_JOB_SERVICE" >
		</service>

		<service android:name="com.android.server.ZramWriteback"
		android:exported="false"
		android:permission="android.permission.BIND_JOB_SERVICE" >

services/core/java/com/android/server/SmartStorageMaintIdler.java

0 → 100644

+89 −0

Original line number	Diff line number	Diff line
		/*
		* 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;

		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.util.Slog;

		import java.util.concurrent.TimeUnit;

		public class SmartStorageMaintIdler extends JobService {
		private static final String TAG = "SmartStorageMaintIdler";

		private static final ComponentName SMART_STORAGE_MAINT_SERVICE =
		new ComponentName("android", SmartStorageMaintIdler.class.getName());

		private static final int SMART_MAINT_JOB_ID = 2808;

		private boolean mStarted;
		private JobParameters mJobParams;
		private final Runnable mFinishCallback = new Runnable() {
		@Override
		public void run() {
		Slog.i(TAG, "Got smart storage maintenance service completion callback");
		if (mStarted) {
		jobFinished(mJobParams, false);
		mStarted = false;
		}
		// ... and try again in a next period
		scheduleSmartIdlePass(SmartStorageMaintIdler.this,
		StorageManagerService.SMART_IDLE_MAINT_PERIOD);
		}
		};

		@Override
		public boolean onStartJob(JobParameters params) {
		mJobParams = params;
		StorageManagerService ms = StorageManagerService.sSelf;
		if (ms != null) {
		mStarted = true;
		ms.runSmartIdleMaint(mFinishCallback);
		}
		return ms != null;
		}

		@Override
		public boolean onStopJob(JobParameters params) {
		mStarted = false;
		return false;
		}

		/**
		* Schedule the smart storage idle maintenance job
		*/
		public static void scheduleSmartIdlePass(Context context, int nHours) {
		StorageManagerService ms = StorageManagerService.sSelf;
		if ((ms == null) \|\| ms.isPassedLifetimeThresh()) {
		return;
		}

		JobScheduler tm = context.getSystemService(JobScheduler.class);

		long nextScheduleTime = TimeUnit.HOURS.toMillis(nHours);

		JobInfo.Builder builder = new JobInfo.Builder(SMART_MAINT_JOB_ID,
		SMART_STORAGE_MAINT_SERVICE);

		builder.setMinimumLatency(nextScheduleTime);
		tm.schedule(builder.build());
		}
		}

services/core/java/com/android/server/StorageManagerService.java

+219 −1

Original line number	Diff line number	Diff line
		@@ -79,6 +79,7 @@ import android.content.res.Configuration;
		import android.content.res.ObbInfo;
		import android.database.ContentObserver;
		import android.net.Uri;
		import android.os.BatteryManager;
		import android.os.Binder;
		import android.os.DropBoxManager;
		import android.os.Environment;
		@@ -158,6 +159,8 @@ import com.android.server.storage.StorageSessionController.ExternalStorageServic
		import com.android.server.wm.ActivityTaskManagerInternal;
		import com.android.server.wm.ActivityTaskManagerInternal.ScreenObserver;

		import java.io.ObjectInputStream;
		import java.io.ObjectOutputStream;
		import libcore.io.IoUtils;
		import libcore.util.EmptyArray;

		@@ -339,7 +342,44 @@ class StorageManagerService extends IStorageManager.Stub

		@Nullable public static String sMediaStoreAuthorityProcessName;

		// Run period in hour for smart idle maintenance
		static final int SMART_IDLE_MAINT_PERIOD = 1;

		private final AtomicFile mSettingsFile;
		private final AtomicFile mHourlyWriteFile;

		private static final int MAX_HOURLY_WRITE_RECORDS = 72;

		/**
		* Default config values for smart idle maintenance
		* Actual values will be controlled by DeviceConfig
		*/
		// Decide whether smart idle maintenance is enabled or not
		private static final boolean DEFAULT_SMART_IDLE_MAINT_ENABLED = false;
		// Storage lifetime percentage threshold to decide to turn off the feature
		private static final int DEFAULT_LIFETIME_PERCENT_THRESHOLD = 70;
		// Minimum required number of dirty + free segments to trigger GC
		private static final int DEFAULT_MIN_SEGMENTS_THRESHOLD = 512;
		// Determine how much portion of current dirty segments will be GCed
		private static final float DEFAULT_DIRTY_RECLAIM_RATE = 0.5F;
		// Multiplier to amplify the target segment number for GC
		private static final float DEFAULT_SEGMENT_RECLAIM_WEIGHT = 1.0F;
		// Low battery level threshold to decide to turn off the feature
		private static final float DEFAULT_LOW_BATTERY_LEVEL = 20F;
		// Decide whether charging is required to turn on the feature
		private static final boolean DEFAULT_CHARGING_REQUIRED = true;

		private volatile int mLifetimePercentThreshold;
		private volatile int mMinSegmentsThreshold;
		private volatile float mDirtyReclaimRate;
		private volatile float mSegmentReclaimWeight;
		private volatile float mLowBatteryLevel;
		private volatile boolean mChargingRequired;
		private volatile boolean mNeedGC;

		private volatile boolean mPassedLifetimeThresh;
		// Tracking storage hourly write amounts
		private volatile int[] mStorageHourlyWrites;

		/**
		* <em>Never</em> hold the lock while performing downcalls into vold, since
		@@ -901,6 +941,10 @@ class StorageManagerService extends IStorageManager.Stub
		}

		private void handleSystemReady() {
		if (prepareSmartIdleMaint()) {
		SmartStorageMaintIdler.scheduleSmartIdlePass(mContext, SMART_IDLE_MAINT_PERIOD);
		}

		// Start scheduling nominally-daily fstrim operations
		MountServiceIdler.scheduleIdlePass(mContext);

		@@ -1907,6 +1951,10 @@ class StorageManagerService extends IStorageManager.Stub

		mSettingsFile = new AtomicFile(
		new File(Environment.getDataSystemDirectory(), "storage.xml"), "storage-settings");
		mHourlyWriteFile = new AtomicFile(
		new File(Environment.getDataSystemDirectory(), "storage-hourly-writes"));

		mStorageHourlyWrites = new int[MAX_HOURLY_WRITE_RECORDS];

		synchronized (mLock) {
		readSettingsLocked();
		@@ -2572,7 +2620,7 @@ class StorageManagerService extends IStorageManager.Stub
		// fstrim time is still updated. If file based checkpoints are used, we run
		// idle maintenance (GC + fstrim) regardless of checkpoint status.
		if (!needsCheckpoint() \|\| !supportsBlockCheckpoint()) {
		mVold.runIdleMaint(new IVoldTaskListener.Stub() {
		mVold.runIdleMaint(mNeedGC, new IVoldTaskListener.Stub() {
		@Override
		public void onStatus(int status, PersistableBundle extras) {
		// Not currently used
		@@ -2623,6 +2671,176 @@ class StorageManagerService extends IStorageManager.Stub
		abortIdleMaint(null);
		}

		private boolean prepareSmartIdleMaint() {
		/**
		* We can choose whether going with a new storage smart idle maintenance job
		* or falling back to the traditional way using DeviceConfig
		*/
		boolean smartIdleMaintEnabled = DeviceConfig.getBoolean(
		DeviceConfig.NAMESPACE_STORAGE_NATIVE_BOOT,
		"smart_idle_maint_enabled",
		DEFAULT_SMART_IDLE_MAINT_ENABLED);
		if (smartIdleMaintEnabled) {
		mLifetimePercentThreshold = DeviceConfig.getInt(
		DeviceConfig.NAMESPACE_STORAGE_NATIVE_BOOT,
		"lifetime_threshold", DEFAULT_LIFETIME_PERCENT_THRESHOLD);
		mMinSegmentsThreshold = DeviceConfig.getInt(DeviceConfig.NAMESPACE_STORAGE_NATIVE_BOOT,
		"min_segments_threshold", DEFAULT_MIN_SEGMENTS_THRESHOLD);
		mDirtyReclaimRate = DeviceConfig.getFloat(DeviceConfig.NAMESPACE_STORAGE_NATIVE_BOOT,
		"dirty_reclaim_rate", DEFAULT_DIRTY_RECLAIM_RATE);
		mSegmentReclaimWeight = DeviceConfig.getFloat(
		DeviceConfig.NAMESPACE_STORAGE_NATIVE_BOOT,
		"segment_reclaim_weight", DEFAULT_SEGMENT_RECLAIM_WEIGHT);
		mLowBatteryLevel = DeviceConfig.getFloat(DeviceConfig.NAMESPACE_STORAGE_NATIVE_BOOT,
		"low_battery_level", DEFAULT_LOW_BATTERY_LEVEL);
		mChargingRequired = DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_STORAGE_NATIVE_BOOT,
		"charging_required", DEFAULT_CHARGING_REQUIRED);

		// If we use the smart idle maintenance, we need to turn off GC in the traditional idle
		// maintenance to avoid the conflict
		mNeedGC = false;

		loadStorageHourlyWrites();
		try {
		mVold.refreshLatestWrite();
		} catch (Exception e) {
		Slog.wtf(TAG, e);
		}
		refreshLifetimeConstraint();
		}
		return smartIdleMaintEnabled;
		}

		// Return whether storage lifetime exceeds the threshold
		public boolean isPassedLifetimeThresh() {
		return mPassedLifetimeThresh;
		}

		private void loadStorageHourlyWrites() {
		FileInputStream fis = null;

		try {
		fis = mHourlyWriteFile.openRead();
		ObjectInputStream ois = new ObjectInputStream(fis);
		mStorageHourlyWrites = (int[])ois.readObject();
		} catch (FileNotFoundException e) {
		// Missing data is okay, probably first boot
		} catch (Exception e) {
		Slog.wtf(TAG, "Failed reading write records", e);
		} finally {
		IoUtils.closeQuietly(fis);
		}
		}

		private int getAverageHourlyWrite() {
		return Arrays.stream(mStorageHourlyWrites).sum() / MAX_HOURLY_WRITE_RECORDS;
		}

		private void updateStorageHourlyWrites(int latestWrite) {
		FileOutputStream fos = null;

		System.arraycopy(mStorageHourlyWrites,0, mStorageHourlyWrites, 1,
		MAX_HOURLY_WRITE_RECORDS - 1);
		mStorageHourlyWrites[0] = latestWrite;
		try {
		fos = mHourlyWriteFile.startWrite();
		ObjectOutputStream oos = new ObjectOutputStream(fos);
		oos.writeObject(mStorageHourlyWrites);
		mHourlyWriteFile.finishWrite(fos);
		} catch (IOException e) {
		if (fos != null) {
		mHourlyWriteFile.failWrite(fos);
		}
		}
		}

		private boolean checkChargeStatus() {
		IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
		Intent batteryStatus = mContext.registerReceiver(null, ifilter);

		if (mChargingRequired) {
		int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
		if (status != BatteryManager.BATTERY_STATUS_CHARGING &&
		status != BatteryManager.BATTERY_STATUS_FULL) {
		Slog.w(TAG, "Battery is not being charged");
		return false;
		}
		}

		int level = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
		int scale = batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
		float chargePercent = level * 100f / (float)scale;

		if (chargePercent < mLowBatteryLevel) {
		Slog.w(TAG, "Battery level is " + chargePercent + ", which is lower than threshold: " +
		mLowBatteryLevel);
		return false;
		}
		return true;
		}

		private boolean refreshLifetimeConstraint() {
		int storageLifeTime = 0;

		try {
		storageLifeTime = mVold.getStorageLifeTime();
		} catch (Exception e) {
		Slog.wtf(TAG, e);
		return false;
		}

		if (storageLifeTime == -1) {
		Slog.w(TAG, "Failed to get storage lifetime");
		return false;
		} else if (storageLifeTime > mLifetimePercentThreshold) {
		Slog.w(TAG, "Ended smart idle maintenance, because of lifetime(" + storageLifeTime +
		")" + ", lifetime threshold(" + mLifetimePercentThreshold + ")");
		mPassedLifetimeThresh = true;
		return false;
		}
		Slog.i(TAG, "Storage lifetime: " + storageLifeTime);
		return true;
		}

		void runSmartIdleMaint(Runnable callback) {
		enforcePermission(android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS);

		try {
		// Block based checkpoint process runs fstrim. So, if checkpoint is in progress
		// (first boot after OTA), We skip the smart idle maintenance
		if (!needsCheckpoint() \|\| !supportsBlockCheckpoint()) {
		if (!refreshLifetimeConstraint() \|\| !checkChargeStatus()) {
		return;
		}

		int latestHourlyWrite = mVold.getWriteAmount();
		if (latestHourlyWrite == -1) {
		Slog.w(TAG, "Failed to get storage hourly write");
		return;
		}

		updateStorageHourlyWrites(latestHourlyWrite);
		int avgHourlyWrite = getAverageHourlyWrite();

		Slog.i(TAG, "Set smart idle maintenance: " + "latest hourly write: " +
		latestHourlyWrite + ", average hourly write: " + avgHourlyWrite +
		", min segment threshold: " + mMinSegmentsThreshold +
		", dirty reclaim rate: " + mDirtyReclaimRate +
		", segment reclaim weight:" + mSegmentReclaimWeight);
		mVold.setGCUrgentPace(avgHourlyWrite, mMinSegmentsThreshold, mDirtyReclaimRate,
		mSegmentReclaimWeight);
		} else {
		Slog.i(TAG, "Skipping smart idle maintenance - block based checkpoint in progress");
		}
		} catch (Exception e) {
		Slog.wtf(TAG, e);
		} finally {
		if (callback != null) {
		callback.run();
		}
		}
		}

		@Override
		public void setDebugFlags(int flags, int mask) {
		enforcePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);