Merge "Use resetJitCounters for boot image profiling" (39cbd1fb) · Commits · e / os / android_frameworks_base

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

+16 −12

Original line number	Diff line number	Diff line
		@@ -248,18 +248,6 @@ public class ZygoteInit {

		InputStream is;
		try {
		// If we are profiling the boot image, avoid preloading classes.
		// Can't use device_config since we are the zygote.
		String prop = SystemProperties.get(
		"persist.device_config.runtime_native_boot.profilebootclasspath", "");
		// Might be empty if the property is unset since the default is "".
		if (prop.length() == 0) {
		prop = SystemProperties.get("dalvik.vm.profilebootclasspath", "");
		}
		if ("true".equals(prop)) {
		return;
		}

		is = new FileInputStream(PRELOADED_CLASSES);
		} catch (FileNotFoundException e) {
		Log.e(TAG, "Couldn't find " + PRELOADED_CLASSES + ".");
		@@ -339,6 +327,22 @@ public class ZygoteInit {
		runtime.preloadDexCaches();
		Trace.traceEnd(Trace.TRACE_TAG_DALVIK);

		// If we are profiling the boot image, reset the Jit counters after preloading the
		// classes. We want to preload for performance, and we can use method counters to
		// infer what clases are used after calling resetJitCounters, for profile purposes.
		// Can't use device_config since we are the zygote.
		String prop = SystemProperties.get(
		"persist.device_config.runtime_native_boot.profilebootclasspath", "");
		// Might be empty if the property is unset since the default is "".
		if (prop.length() == 0) {
		prop = SystemProperties.get("dalvik.vm.profilebootclasspath", "");
		}
		if ("true".equals(prop)) {
		Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "ResetJitCounters");
		runtime.resetJitCounters();
		Trace.traceEnd(Trace.TRACE_TAG_DALVIK);
		}

		// Bring back root. We'll need it later if we're in the zygote.
		if (droppedPriviliges) {
		try {