Adjust Java Language thread priority in new processes. am: 80993a6e60 am: 13839cfe41 (30df04e3) · Commits · e / os / android_frameworks_base

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

+3 −0

Original line number	Diff line number	Diff line
		@@ -654,6 +654,9 @@ public final class Zygote {
		// End of the postFork event.
		Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);

		// Set the Java Language thread priority to the default value for new apps.
		Thread.currentThread().setPriority(Thread.NORM_PRIORITY);

		return ZygoteInit.zygoteInit(args.mTargetSdkVersion,
		args.mDisabledCompatChanges,
		args.mRemainingArgs,

+3 −0

Original line number	Diff line number	Diff line
		@@ -487,6 +487,9 @@ class ZygoteConnection {

		Zygote.setAppProcessName(parsedArgs, TAG);

		// Set the Java Language thread priority to the default value for new apps.
		Thread.currentThread().setPriority(Thread.NORM_PRIORITY);

		// End of the postFork event.
		Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
		if (parsedArgs.mInvokeWith != null) {

+15 −3

Original line number	Diff line number	Diff line
		@@ -518,6 +518,9 @@ public class ZygoteInit {
		}
		}

		// Set the Java Language thread priority to the default value for the system server.
		Thread.currentThread().setPriority(Thread.NORM_PRIORITY);

		if (parsedArgs.mInvokeWith != null) {
		String[] args = parsedArgs.mRemainingArgs;
		// If we have a non-null system server class path, we'll have to duplicate the
		@@ -825,13 +828,22 @@ public class ZygoteInit {
		return result;
		}

		/**
		* This is the entry point for a Zygote process. It creates the Zygote server, loads resources,
		* and handles other tasks related to preparing the process for forking into applications.
		*
		* This process is started with a nice value of -20 (highest priority). All paths that flow
		* into new processes are required to either set the priority to the default value or terminate
		* before executing any non-system code. The native side of this occurs in SpecializeCommon,
		* while the Java Language priority is changed in ZygoteInit.handleSystemServerProcess,
		* ZygoteConnection.handleChildProc, and Zygote.usapMain.
		*
		* @param argv Command line arguments used to specify the Zygote's configuration.
		*/
		@UnsupportedAppUsage
		public static void main(String argv[]) {
		ZygoteServer zygoteServer = null;

		// Set the initial thread priority to the "normal" value.
		Thread.currentThread().setPriority(Thread.NORM_PRIORITY);

		// Mark zygote start. This ensures that thread creation will throw
		// an error.
		ZygoteHooks.startZygoteNoThreadCreation();