Merge "profcollect: introduce a cool down window between trace events" into main (ac2f03ec) · Commits · e / os / android_frameworks_base

services/profcollect/src/com/android/server/profcollect/Utils.java

+25 −0

Original line number	Diff line number	Diff line
		@@ -25,10 +25,14 @@ import android.util.Log;

		import com.android.internal.os.BackgroundThread;

		import java.time.Instant;
		import java.util.concurrent.ThreadLocalRandom;

		public final class Utils {

		private static Instant lastTraceTime = Instant.EPOCH;
		private static final int TRACE_COOLDOWN_SECONDS = 30;

		public static boolean withFrequency(String configName, int defaultFrequency) {
		int threshold = DeviceConfig.getInt(
		DeviceConfig.NAMESPACE_PROFCOLLECT_NATIVE_BOOT, configName, defaultFrequency);
		@@ -40,6 +44,9 @@ public final class Utils {
		if (mIProfcollect == null) {
		return false;
		}
		if (isInCooldownOrReset()) {
		return false;
		}
		BackgroundThread.get().getThreadHandler().post(() -> {
		try {
		mIProfcollect.trace_system(eventName);
		@@ -54,6 +61,9 @@ public final class Utils {
		if (mIProfcollect == null) {
		return false;
		}
		if (isInCooldownOrReset()) {
		return false;
		}
		BackgroundThread.get().getThreadHandler().postDelayed(() -> {
		try {
		mIProfcollect.trace_system(eventName);
		@@ -69,6 +79,9 @@ public final class Utils {
		if (mIProfcollect == null) {
		return false;
		}
		if (isInCooldownOrReset()) {
		return false;
		}
		BackgroundThread.get().getThreadHandler().post(() -> {
		try {
		mIProfcollect.trace_process(eventName,
		@@ -80,4 +93,16 @@ public final class Utils {
		});
		return true;
		}

		/**
		* Returns true if the last trace is within the cooldown period. If the last trace is outside
		* the cooldown period, the last trace time is reset to the current time.
		*/
		private static boolean isInCooldownOrReset() {
		if (!Instant.now().isBefore(lastTraceTime.plusSeconds(TRACE_COOLDOWN_SECONDS))) {
		lastTraceTime = Instant.now();
		return false;
		}
		return true;
		}
		}