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Commit eabbf872 authored by Chris Wailes's avatar Chris Wailes
Browse files

Make the USAP Pool refill delay configurable. 

This patch fetches the USAP pool refill delay value from device_config
instead of hardcoding it.

Bug: 131362095
Bug: 146614089
Test: Build and launch 10+ apps successfully
Change-Id: Idfeb30fa62fa296492da211b2b44902ff4f99b18
Merged-In: Idfeb30fa62fa296492da211b2b44902ff4f99b18
parent 7e9f83e1

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;

                }

            }