Make the USAP Pool refill delay configurable. (d5c2d5d7) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/os/ZygoteServer.java

+17 −7

Original line number	Original line	Diff line number	Diff line
	@@ -66,11 +66,8 @@ class ZygoteServer {
	/** The default value used for the USAP_POOL_SIZE_MIN device property */		/** The default value used for the USAP_POOL_SIZE_MIN device property */
	private static final String USAP_POOL_SIZE_MIN_DEFAULT = "1";		private static final String USAP_POOL_SIZE_MIN_DEFAULT = "1";

	/**		/** The default value used for the USAP_REFILL_DELAY_MS device property */
	* Number of milliseconds to delay before refilling the pool if it hasn't reached its		private static final String USAP_POOL_REFILL_DELAY_MS_DEFAULT = "3000";
	* minimum value.
	*/
	private static final int USAP_REFILL_DELAY_MS = 3000;

	/** The "not a timestamp" value for the refill delay timestamp mechanism. */		/** The "not a timestamp" value for the refill delay timestamp mechanism. */
	private static final int INVALID_TIMESTAMP = -1;		private static final int INVALID_TIMESTAMP = -1;
	@@ -140,6 +137,12 @@ class ZygoteServer {
	*/		*/
	private int mUsapPoolRefillThreshold = 0;		private int mUsapPoolRefillThreshold = 0;

			/**
			* Number of milliseconds to delay before refilling the pool if it hasn't reached its
			* minimum value.
			*/
			private int mUsapPoolRefillDelayMs = -1;

	private enum UsapPoolRefillAction {		private enum UsapPoolRefillAction {
	DELAYED,		DELAYED,
	IMMEDIATE,		IMMEDIATE,
	@@ -282,6 +285,13 @@ class ZygoteServer {
	mUsapPoolSizeMax);		mUsapPoolSizeMax);
	}		}

			final String usapPoolRefillDelayMsPropString = Zygote.getConfigurationProperty(
			ZygoteConfig.USAP_POOL_REFILL_DELAY_MS, USAP_POOL_REFILL_DELAY_MS_DEFAULT);

			if (!usapPoolRefillDelayMsPropString.isEmpty()) {
			mUsapPoolRefillDelayMs = Integer.parseInt(usapPoolRefillDelayMsPropString);
			}

	// Sanity check		// Sanity check
	if (mUsapPoolSizeMin >= mUsapPoolSizeMax) {		if (mUsapPoolSizeMin >= mUsapPoolSizeMax) {
	Log.w(TAG, "The max size of the USAP pool must be greater than the minimum size."		Log.w(TAG, "The max size of the USAP pool must be greater than the minimum size."
	@@ -469,13 +479,13 @@ class ZygoteServer {
	int elapsedTimeMs =		int elapsedTimeMs =
	(int) (System.currentTimeMillis() - usapPoolRefillTriggerTimestamp);		(int) (System.currentTimeMillis() - usapPoolRefillTriggerTimestamp);

	if (elapsedTimeMs >= USAP_REFILL_DELAY_MS) {		if (elapsedTimeMs >= mUsapPoolRefillDelayMs) {
	// Normalize the poll timeout value when the time between one poll event and the		// Normalize the poll timeout value when the time between one poll event and the
	// next pushes us over the delay value. This prevents poll receiving a 0		// next pushes us over the delay value. This prevents poll receiving a 0
	// timeout value, which would result in it returning immediately.		// timeout value, which would result in it returning immediately.
	pollTimeoutMs = -1;		pollTimeoutMs = -1;
	} else {		} else {
	pollTimeoutMs = USAP_REFILL_DELAY_MS - elapsedTimeMs;		pollTimeoutMs = mUsapPoolRefillDelayMs - elapsedTimeMs;
	}		}
	}		}