Merge "In low storage, recalculate cache quotas if 2% change in total space" (96709414) · Commits · e / os / android_frameworks_base

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

+16 −6

Original line number	Diff line number	Diff line
		@@ -552,23 +552,26 @@ public class StorageStatsService extends IStorageStatsManager.Stub {
		private static final int MSG_PACKAGE_REMOVED = 103;
		/**
		* By only triggering a re-calculation after the storage has changed sizes, we can avoid
		* recalculating quotas too often. Minimum change delta defines the percentage of change
		* we need to see before we recalculate.
		* recalculating quotas too often. Minimum change delta high and low define the
		* percentage of change we need to see before we recalculate quotas when the device has
		* enough storage space (more than StorageManager.STORAGE_THRESHOLD_PERCENT_HIGH of total
		* free) and in low storage condition respectively.
		*/
		private static final double MINIMUM_CHANGE_DELTA = 0.05;
		private static final long MINIMUM_CHANGE_DELTA_PERCENT_HIGH = 5;
		private static final long MINIMUM_CHANGE_DELTA_PERCENT_LOW = 2;
		private static final int UNSET = -1;
		private static final boolean DEBUG = false;

		private final StatFs mStats;
		private long mPreviousBytes;
		private double mMinimumThresholdBytes;
		private long mTotalBytes;

		public H(Looper looper) {
		super(looper);
		// TODO: Handle all private volumes.
		mStats = new StatFs(Environment.getDataDirectory().getAbsolutePath());
		mPreviousBytes = mStats.getAvailableBytes();
		mMinimumThresholdBytes = mStats.getTotalBytes() * MINIMUM_CHANGE_DELTA;
		mTotalBytes = mStats.getTotalBytes();
		}

		public void handleMessage(Message msg) {
		@@ -584,7 +587,14 @@ public class StorageStatsService extends IStorageStatsManager.Stub {
		case MSG_CHECK_STORAGE_DELTA: {
		mStats.restat(Environment.getDataDirectory().getAbsolutePath());
		long bytesDelta = Math.abs(mPreviousBytes - mStats.getAvailableBytes());
		if (bytesDelta > mMinimumThresholdBytes) {
		long bytesDeltaThreshold;
		if (mStats.getAvailableBytes() > mTotalBytes
		* StorageManager.STORAGE_THRESHOLD_PERCENT_HIGH / 100) {
		bytesDeltaThreshold = mTotalBytes * MINIMUM_CHANGE_DELTA_PERCENT_HIGH / 100;
		} else {
		bytesDeltaThreshold = mTotalBytes * MINIMUM_CHANGE_DELTA_PERCENT_LOW / 100;
		}
		if (bytesDelta > bytesDeltaThreshold) {
		mPreviousBytes = mStats.getAvailableBytes();
		recalculateQuotas(getInitializedStrategy());
		notifySignificantDelta();