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Merge "Enable boost-locked-region-priority" into nyc-dev

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This commit is contained in:
Alan Leung
2016-05-20 06:09:13 +00:00
committed by Android (Google) Code Review
parent 4f2a1d0913 880721b38b
commit 430894d1bb
2 changed files with 30 additions and 0 deletions
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6
services/core/Android.mk
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@@ -24,4 +24,10 @@ ifneq ($(INCREMENTAL_BUILDS),)
LOCAL_JACK_ENABLED := incremental
endif
LOCAL_JACK_FLAGS := \
-D jack.transformations.boost-locked-region-priority=true \
-D jack.transformations.boost-locked-region-priority.classname=com.android.server.am.ActivityManagerService \
-D jack.transformations.boost-locked-region-priority.request=com.android.server.am.ActivityManagerService\#boostPriorityForLockedSection \
-D jack.transformations.boost-locked-region-priority.reset=com.android.server.am.ActivityManagerService\#resetPriorityAfterLockedSection
include $(BUILD_STATIC_JAVA_LIBRARY)

24
services/core/java/com/android/server/am/ActivityManagerService.java
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@@ -628,6 +628,30 @@ public final class ActivityManagerService extends ActivityManagerNative
return mShowDialogs && !mSleeping && !mShuttingDown;
}
// it's a semaphore; boost when 0->1, reset when 1->0
static ThreadLocal<Integer> sIsBoosted = new ThreadLocal<Integer>() {
@Override protected Integer initialValue() {
return 0;
}
};
static void boostPriorityForLockedSection() {
if (sIsBoosted.get() == 0) {
// boost to prio 118 while holding a global lock
Process.setThreadPriority(Process.myTid(), -2);
//Log.e(TAG, "PRIORITY BOOST: set priority on TID " + Process.myTid());
}
int cur = sIsBoosted.get();
sIsBoosted.set(cur + 1);
}
static void resetPriorityAfterLockedSection() {
sIsBoosted.set(sIsBoosted.get() - 1);
if (sIsBoosted.get() == 0) {
//Log.e(TAG, "PRIORITY BOOST: reset priority on TID " + Process.myTid());
Process.setThreadPriority(Process.myTid(), 0);
}
}
public class PendingAssistExtras extends Binder implements Runnable {
public final ActivityRecord activity;
public final Bundle extras;