Merge "CPU time min threshold for CpuTimePerUidFreq" (f069be7b) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/stats/pull/StatsPullAtomService.java

+8 −1

Original line number	Diff line number	Diff line
		@@ -247,6 +247,13 @@ public class StatsPullAtomService extends SystemService {
		// 20% as a conservative estimate.
		private static final int MAX_PROCSTATS_RAW_SHARD_SIZE = (int) (MAX_PROCSTATS_SHARD_SIZE * 1.20);

		/**
		* Threshold to filter out small CPU times at frequency per UID. Those small values appear
		* because of more precise accounting in a BPF program. Discarding them reduces the data by at
		* least 20% with negligible error.
		*/
		private static final int MIN_CPU_TIME_PER_UID_FREQ = 10;

		private final Object mThermalLock = new Object();
		@GuardedBy("mThermalLock")
		private IThermalService mThermalService;
		@@ -1509,7 +1516,7 @@ public class StatsPullAtomService extends SystemService {
		int pullCpuTimePerUidFreqLocked(int atomTag, List<StatsEvent> pulledData) {
		mCpuUidFreqTimeReader.readAbsolute((uid, cpuFreqTimeMs) -> {
		for (int freqIndex = 0; freqIndex < cpuFreqTimeMs.length; ++freqIndex) {
		if (cpuFreqTimeMs[freqIndex] != 0) {
		if (cpuFreqTimeMs[freqIndex] >= MIN_CPU_TIME_PER_UID_FREQ) {
		pulledData.add(FrameworkStatsLog.buildStatsEvent(
		atomTag, uid, freqIndex, cpuFreqTimeMs[freqIndex]));
		}