Merge "UsageStatsService: Fix app idle issue at rollover time" into mnc-dr1.5-dev (15df80f0) · Commits · e / os / android_frameworks_base

services/usage/java/com/android/server/usage/UserUsageStatsService.java

+81 −4

Original line number	Diff line number	Diff line
		@@ -59,6 +59,7 @@ class UserUsageStatsService {
		private final Context mContext;
		private final UsageStatsDatabase mDatabase;
		private final IntervalStats[] mCurrentStats;
		private IntervalStats mAppIdleRollingWindow;
		private boolean mStatsChanged = false;
		private final UnixCalendar mDailyExpiryDate;
		private final StatsUpdatedListener mListener;
		@@ -138,6 +139,8 @@ class UserUsageStatsService {
		initializeDefaultsForApps(currentTimeMillis, deviceUsageTime,
		mDatabase.isFirstUpdate());
		}

		refreshAppIdleRollingWindow(currentTimeMillis);
		}

		/**
		@@ -171,6 +174,7 @@ class UserUsageStatsService {
		persistActiveStats();
		mDatabase.onTimeChanged(newTime - oldTime);
		loadActiveStats(newTime, /* force= */ true, resetBeginIdleTime);
		refreshAppIdleRollingWindow(newTime);
		}

		void reportEvent(UsageEvents.Event event, long deviceUsageTime) {
		@@ -212,6 +216,11 @@ class UserUsageStatsService {
		}
		}

		if (event.mEventType != Event.CONFIGURATION_CHANGE) {
		mAppIdleRollingWindow.update(event.mPackage, event.mTimeStamp, event.mEventType);
		mAppIdleRollingWindow.updateBeginIdleTime(event.mPackage, deviceUsageTime);
		}

		notifyStatsChanged();
		}

		@@ -223,6 +232,7 @@ class UserUsageStatsService {
		for (IntervalStats stats : mCurrentStats) {
		stats.updateBeginIdleTime(packageName, beginIdleTime);
		}
		mAppIdleRollingWindow.updateBeginIdleTime(packageName, beginIdleTime);
		notifyStatsChanged();
		}

		@@ -230,6 +240,7 @@ class UserUsageStatsService {
		for (IntervalStats stats : mCurrentStats) {
		stats.updateSystemLastUsedTime(packageName, lastUsedTime);
		}
		mAppIdleRollingWindow.updateSystemLastUsedTime(packageName, lastUsedTime);
		notifyStatsChanged();
		}

		@@ -388,9 +399,8 @@ class UserUsageStatsService {
		}

		long getBeginIdleTime(String packageName) {
		final IntervalStats yearly = mCurrentStats[UsageStatsManager.INTERVAL_YEARLY];
		UsageStats packageUsage;
		if ((packageUsage = yearly.packageStats.get(packageName)) == null) {
		if ((packageUsage = mAppIdleRollingWindow.packageStats.get(packageName)) == null) {
		return -1;
		} else {
		return packageUsage.getBeginIdleTime();
		@@ -398,9 +408,8 @@ class UserUsageStatsService {
		}

		long getSystemLastUsedTime(String packageName) {
		final IntervalStats yearly = mCurrentStats[UsageStatsManager.INTERVAL_YEARLY];
		UsageStats packageUsage;
		if ((packageUsage = yearly.packageStats.get(packageName)) == null) {
		if ((packageUsage = mAppIdleRollingWindow.packageStats.get(packageName)) == null) {
		return -1;
		} else {
		return packageUsage.getLastTimeSystemUsed();
		@@ -462,6 +471,8 @@ class UserUsageStatsService {
		}
		persistActiveStats();

		refreshAppIdleRollingWindow(currentTimeMillis);

		final long totalTime = SystemClock.elapsedRealtime() - startTime;
		Slog.i(TAG, mLogPrefix + "Rolling over usage stats complete. Took " + totalTime
		+ " milliseconds");
		@@ -521,6 +532,7 @@ class UserUsageStatsService {
		}
		}
		}

		mStatsChanged = false;
		mDailyExpiryDate.setTimeInMillis(currentTimeMillis);
		mDailyExpiryDate.addDays(1);
		@@ -530,6 +542,68 @@ class UserUsageStatsService {
		tempCal.getTimeInMillis() + ")");
		}

		private static void mergePackageStats(IntervalStats dst, IntervalStats src) {
		dst.endTime = Math.max(dst.endTime, src.endTime);

		final int srcPackageCount = src.packageStats.size();
		for (int i = 0; i < srcPackageCount; i++) {
		final String packageName = src.packageStats.keyAt(i);
		final UsageStats srcStats = src.packageStats.valueAt(i);
		final UsageStats dstStats = dst.packageStats.get(packageName);
		if (dstStats == null) {
		dst.packageStats.put(packageName, new UsageStats(srcStats));
		} else {
		dstStats.add(src.packageStats.valueAt(i));
		}
		}
		}

		/**
		* Merges all the stats into the first element of the resulting list.
		*/
		private static final StatCombiner<IntervalStats> sPackageStatsMerger =
		new StatCombiner<IntervalStats>() {
		@Override
		public void combine(IntervalStats stats, boolean mutable,
		List<IntervalStats> accumulatedResult) {
		IntervalStats accum;
		if (accumulatedResult.isEmpty()) {
		accum = new IntervalStats();
		accum.beginTime = stats.beginTime;
		accumulatedResult.add(accum);
		} else {
		accum = accumulatedResult.get(0);
		}

		mergePackageStats(accum, stats);
		}
		};

		/**
		* App idle operates on a rolling window of time. When we roll over time, we end up with a
		* period of time where in-memory stats are empty and we don't hit the disk for older stats
		* for performance reasons. Suddenly all apps will become idle.
		*
		* Instead, at times we do a deep query to find all the apps that have run in the past few
		* days and keep the cached data up to date.
		*
		* @param currentTimeMillis
		*/
		void refreshAppIdleRollingWindow(long currentTimeMillis) {
		// Start the rolling window for AppIdle requests.
		List<IntervalStats> stats = mDatabase.queryUsageStats(UsageStatsManager.INTERVAL_DAILY,
		currentTimeMillis - (1000 * 60 * 60 * 24 * 2), currentTimeMillis,
		sPackageStatsMerger);

		if (stats == null \|\| stats.isEmpty()) {
		mAppIdleRollingWindow = new IntervalStats();
		mergePackageStats(mAppIdleRollingWindow,
		mCurrentStats[UsageStatsManager.INTERVAL_YEARLY]);
		} else {
		mAppIdleRollingWindow = stats.get(0);
		}
		}

		//
		// -- DUMP related methods --
		//
		@@ -552,6 +626,9 @@ class UserUsageStatsService {
		pw.println(" stats");
		printIntervalStats(pw, mCurrentStats[interval], screenOnTime, true);
		}

		pw.println("AppIdleRollingWindow cache");
		printIntervalStats(pw, mAppIdleRollingWindow, screenOnTime, true);
		}

		private String formatDateTime(long dateTime, boolean pretty) {