Add KernelCpuThreadReader minimium CPU usage threshold (648d2035) · Commits · e / os / android_frameworks_base

apct-tests/perftests/core/src/android/os/KernelCpuThreadReaderPerfTest.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -40,7 +40,7 @@ public class KernelCpuThreadReaderPerfTest {
		public final PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter();

		private final KernelCpuThreadReader mKernelCpuThreadReader =
		KernelCpuThreadReader.create(8, uid -> 1000 <= uid && uid < 2000);
		KernelCpuThreadReader.create(8, uid -> 1000 <= uid && uid < 2000, 0);

		@Test
		public void timeReadCurrentProcessCpuUsage() {

core/java/android/provider/Settings.java

+1 −0

Original line number	Diff line number	Diff line
		@@ -14334,6 +14334,7 @@ public final class Settings {
		* <pre>
		* num_buckets (int)
		* collected_uids (string)
		* minimum_total_cpu_usage_millis (int)
		* </pre>
		*
		* @hide

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

+32 −1

Original line number	Diff line number	Diff line
		@@ -108,6 +108,12 @@ public class KernelCpuThreadReader {
		*/
		private Predicate<Integer> mUidPredicate;

		/**
		* If a thread has strictly less than {@code minimumTotalCpuUsageMillis} total CPU usage, it
		* will not be reported
		*/
		private int mMinimumTotalCpuUsageMillis;

		/**
		* Where the proc filesystem is mounted
		*/
		@@ -142,10 +148,12 @@ public class KernelCpuThreadReader {
		public KernelCpuThreadReader(
		int numBuckets,
		Predicate<Integer> uidPredicate,
		int minimumTotalCpuUsageMillis,
		Path procPath,
		Path initialTimeInStatePath,
		Injector injector) throws IOException {
		mUidPredicate = uidPredicate;
		mMinimumTotalCpuUsageMillis = minimumTotalCpuUsageMillis;
		mProcPath = procPath;
		mProcTimeInStateReader = new ProcTimeInStateReader(initialTimeInStatePath);
		mInjector = injector;
		@@ -158,11 +166,13 @@ public class KernelCpuThreadReader {
		* @return the reader, null if an exception was thrown during creation
		*/
		@Nullable
		public static KernelCpuThreadReader create(int numBuckets, Predicate<Integer> uidPredicate) {
		public static KernelCpuThreadReader create(
		int numBuckets, Predicate<Integer> uidPredicate, int minimumTotalCpuUsageMillis) {
		try {
		return new KernelCpuThreadReader(
		numBuckets,
		uidPredicate,
		minimumTotalCpuUsageMillis,
		DEFAULT_PROC_PATH,
		DEFAULT_INITIAL_TIME_IN_STATE_PATH,
		new Injector());
		@@ -307,6 +317,18 @@ public class KernelCpuThreadReader {
		mUidPredicate = uidPredicate;
		}

		/**
		* If a thread has strictly less than {@code minimumTotalCpuUsageMillis} total CPU usage, it
		* will not be reported
		*/
		void setMinimumTotalCpuUsageMillis(int minimumTotalCpuUsageMillis) {
		if (minimumTotalCpuUsageMillis < 0) {
		Slog.w(TAG, "Negative minimumTotalCpuUsageMillis: " + minimumTotalCpuUsageMillis);
		return;
		}
		mMinimumTotalCpuUsageMillis = minimumTotalCpuUsageMillis;
		}

		/**
		* Get the CPU frequencies that correspond to the times reported in
		* {@link ThreadCpuUsage#usageTimesMillis}
		@@ -346,6 +368,15 @@ public class KernelCpuThreadReader {
		}
		int[] cpuUsages = mFrequencyBucketCreator.getBucketedValues(cpuUsagesLong);

		// Check if the total CPU usage below the threshold
		int totalCpuUsage = 0;
		for (int i = 0; i < cpuUsages.length; i++) {
		totalCpuUsage += cpuUsages[i];
		}
		if (totalCpuUsage < mMinimumTotalCpuUsageMillis) {
		return null;
		}

		return new ThreadCpuUsage(threadId, threadName, cpuUsages);
		}

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

+12 −1

Original line number	Diff line number	Diff line
		@@ -59,6 +59,13 @@ public class KernelCpuThreadReaderSettingsObserver extends ContentObserver {
		private static final String COLLECTED_UIDS_SETTINGS_KEY = "collected_uids";
		private static final String COLLECTED_UIDS_DEFAULT = "1000-1000";

		/**
		* Minimum total CPU usage to report
		*/
		private static final String MINIMUM_TOTAL_CPU_USAGE_MILLIS_SETTINGS_KEY =
		"minimum_total_cpu_usage_millis";
		private static final int MINIMUM_TOTAL_CPU_USAGE_MILLIS_DEFAULT = 0;

		private final Context mContext;

		@Nullable
		@@ -87,7 +94,8 @@ public class KernelCpuThreadReaderSettingsObserver extends ContentObserver {
		mContext = context;
		mKernelCpuThreadReader = KernelCpuThreadReader.create(
		NUM_BUCKETS_DEFAULT,
		UidPredicate.fromString(COLLECTED_UIDS_DEFAULT));
		UidPredicate.fromString(COLLECTED_UIDS_DEFAULT),
		MINIMUM_TOTAL_CPU_USAGE_MILLIS_DEFAULT);
		}

		@Override
		@@ -124,6 +132,9 @@ public class KernelCpuThreadReaderSettingsObserver extends ContentObserver {
		mKernelCpuThreadReader.setNumBuckets(
		parser.getInt(NUM_BUCKETS_SETTINGS_KEY, NUM_BUCKETS_DEFAULT));
		mKernelCpuThreadReader.setUidPredicate(uidPredicate);
		mKernelCpuThreadReader.setMinimumTotalCpuUsageMillis(parser.getInt(
		MINIMUM_TOTAL_CPU_USAGE_MILLIS_SETTINGS_KEY,
		MINIMUM_TOTAL_CPU_USAGE_MILLIS_DEFAULT));
		}

		/**

core/tests/coretests/src/com/android/internal/os/KernelCpuThreadReaderEndToEndTest.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -123,7 +123,7 @@ public class KernelCpuThreadReaderEndToEndTest {

		// Get thread data from KernelCpuThreadReader
		final KernelCpuThreadReader kernelCpuThreadReader =
		KernelCpuThreadReader.create(8, uid -> uid == Process.myUid());
		KernelCpuThreadReader.create(8, uid -> uid == Process.myUid(), 0);
		assertNotNull(kernelCpuThreadReader);
		final ProcessCpuUsage currentProcessCpuUsage =
		kernelCpuThreadReader.getCurrentProcessCpuUsage();