Merge "Make the USAP Pool refill delay configurable." (3c67a5fb) · Commits · e / os / android_frameworks_base

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

+3 −0

Original line number	Diff line number	Diff line
		@@ -34,4 +34,7 @@ public class ZygoteConfig {

		/** The minimum number of processes to keep in the USAP pool */
		public static final String USAP_POOL_SIZE_MIN = "usap_pool_size_min";

		/** The number of milliseconds to delay before refilling the USAP pool */
		public static final String USAP_POOL_REFILL_DELAY_MS = "usap_pool_refill_delay_ms";
		}

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

+17 −7

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

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

		/** The "not a timestamp" value for the refill delay timestamp mechanism. */
		private static final int INVALID_TIMESTAMP = -1;
		@@ -140,6 +137,12 @@ class ZygoteServer {
		*/
		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 {
		DELAYED,
		IMMEDIATE,
		@@ -282,6 +285,13 @@ class ZygoteServer {
		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
		if (mUsapPoolSizeMin >= mUsapPoolSizeMax) {
		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) (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
		// next pushes us over the delay value. This prevents poll receiving a 0
		// timeout value, which would result in it returning immediately.
		pollTimeoutMs = -1;
		} else {
		pollTimeoutMs = USAP_REFILL_DELAY_MS - elapsedTimeMs;
		pollTimeoutMs = mUsapPoolRefillDelayMs - elapsedTimeMs;
		}
		}