Merge "Fix app compaction bug and add tests." into rvc-dev am: 197709093a (37547257) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/am/CachedAppOptimizer.java

+51 −22

Original line number	Diff line number	Diff line
		@@ -45,6 +45,7 @@ import com.android.server.ServiceThread;

		import java.io.FileOutputStream;
		import java.io.FileReader;
		import java.io.IOException;
		import java.io.PrintWriter;
		import java.util.ArrayList;
		import java.util.Arrays;
		@@ -114,6 +115,14 @@ public final class CachedAppOptimizer {
		}
		private PropertyChangedCallbackForTest mTestCallback;

		// This interface is for functions related to the Process object that need a different
		// implementation in the tests as we are not creating real processes when testing compaction.
		@VisibleForTesting
		interface ProcessDependencies {
		long[] getRss(int pid);
		void performCompaction(String action, int pid) throws IOException;
		}

		// Handler constants.
		static final int COMPACT_PROCESS_SOME = 1;
		static final int COMPACT_PROCESS_FULL = 2;
		@@ -215,13 +224,16 @@ public final class CachedAppOptimizer {
		@VisibleForTesting final Set<Integer> mProcStateThrottle;

		// Handler on which compaction runs.
		private Handler mCompactionHandler;
		@VisibleForTesting
		Handler mCompactionHandler;
		private Handler mFreezeHandler;

		// Maps process ID to last compaction statistics for processes that we've fully compacted. Used
		// when evaluating throttles that we only consider for "full" compaction, so we don't store
		// data for "some" compactions.
		private Map<Integer, LastCompactionStats> mLastCompactionStats =
		// data for "some" compactions. Uses LinkedHashMap to ensure insertion order is kept and
		// facilitate removal of the oldest entry.
		@VisibleForTesting
		LinkedHashMap<Integer, LastCompactionStats> mLastCompactionStats =
		new LinkedHashMap<Integer, LastCompactionStats>() {
		@Override
		protected boolean removeEldestEntry(Map.Entry eldest) {
		@@ -233,17 +245,20 @@ public final class CachedAppOptimizer {
		private int mFullCompactionCount;
		private int mPersistentCompactionCount;
		private int mBfgsCompactionCount;
		private final ProcessDependencies mProcessDependencies;

		public CachedAppOptimizer(ActivityManagerService am) {
		this(am, null, new DefaultProcessDependencies());
		}

		@VisibleForTesting
		CachedAppOptimizer(ActivityManagerService am, PropertyChangedCallbackForTest callback,
		ProcessDependencies processDependencies) {
		mAm = am;
		mCachedAppOptimizerThread = new ServiceThread("CachedAppOptimizerThread",
		THREAD_PRIORITY_FOREGROUND, true);
		mProcStateThrottle = new HashSet<>();
		}

		@VisibleForTesting
		CachedAppOptimizer(ActivityManagerService am, PropertyChangedCallbackForTest callback) {
		this(am);
		mProcessDependencies = processDependencies;
		mTestCallback = callback;
		}

		@@ -659,7 +674,8 @@ public final class CachedAppOptimizer {
		}
		}

		private static final class LastCompactionStats {
		@VisibleForTesting
		static final class LastCompactionStats {
		private final long[] mRssAfterCompaction;

		LastCompactionStats(long[] rss) {
		@@ -712,9 +728,7 @@ public final class CachedAppOptimizer {

		lastCompactAction = proc.lastCompactAction;
		lastCompactTime = proc.lastCompactTime;
		// remove rather than get so that insertion order will be updated when we
		// put the post-compaction stats back into the map.
		lastCompactionStats = mLastCompactionStats.remove(pid);
		lastCompactionStats = mLastCompactionStats.get(pid);
		}

		if (pid == 0) {
		@@ -806,7 +820,7 @@ public final class CachedAppOptimizer {
		return;
		}

		long[] rssBefore = Process.getRss(pid);
		long[] rssBefore = mProcessDependencies.getRss(pid);
		long anonRssBefore = rssBefore[2];

		if (rssBefore[0] == 0 && rssBefore[1] == 0 && rssBefore[2] == 0
		@@ -863,16 +877,13 @@ public final class CachedAppOptimizer {
		default:
		break;
		}

		try {
		Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "Compact "
		+ ((pendingAction == COMPACT_PROCESS_SOME) ? "some" : "full")
		+ ": " + name);
		long zramFreeKbBefore = Debug.getZramFreeKb();
		FileOutputStream fos = new FileOutputStream("/proc/" + pid + "/reclaim");
		fos.write(action.getBytes());
		fos.close();
		long[] rssAfter = Process.getRss(pid);
		mProcessDependencies.performCompaction(action, pid);
		long[] rssAfter = mProcessDependencies.getRss(pid);
		long end = SystemClock.uptimeMillis();
		long time = end - start;
		long zramFreeKbAfter = Debug.getZramFreeKb();
		@@ -882,7 +893,6 @@ public final class CachedAppOptimizer {
		rssAfter[2] - rssBefore[2], rssAfter[3] - rssBefore[3], time,
		lastCompactAction, lastCompactTime, lastOomAdj, procState,
		zramFreeKbBefore, zramFreeKbAfter - zramFreeKbBefore);

		// Note that as above not taking mPhenoTypeFlagLock here to avoid locking
		// on every single compaction for a flag that will seldom change and the
		// impact of reading the wrong value here is low.
		@@ -894,14 +904,14 @@ public final class CachedAppOptimizer {
		lastOomAdj, ActivityManager.processStateAmToProto(procState),
		zramFreeKbBefore, zramFreeKbAfter);
		}

		synchronized (mAm) {
		proc.lastCompactTime = end;
		proc.lastCompactAction = pendingAction;
		}

		if (action.equals(COMPACT_ACTION_FULL)
		\|\| action.equals(COMPACT_ACTION_ANON)) {
		// Remove entry and insert again to update insertion order.
		mLastCompactionStats.remove(pid);
		mLastCompactionStats.put(pid, new LastCompactionStats(rssAfter));
		}
		} catch (Exception e) {
		@@ -1018,4 +1028,23 @@ public final class CachedAppOptimizer {
		}
		}
		}

		/**
		* Default implementation for ProcessDependencies, public vor visibility to OomAdjuster class.
		*/
		private static final class DefaultProcessDependencies implements ProcessDependencies {
		// Get memory RSS from process.
		@Override
		public long[] getRss(int pid) {
		return Process.getRss(pid);
		}

		// Compact process.
		@Override
		public void performCompaction(String action, int pid) throws IOException {
		try (FileOutputStream fos = new FileOutputStream("/proc/" + pid + "/reclaim")) {
		fos.write(action.getBytes());
		}
		}
		}
		}

services/tests/mockingservicestests/src/com/android/server/am/CachedAppOptimizerTest.java

+240 −9

Original line number	Diff line number	Diff line
		@@ -16,14 +16,23 @@

		package com.android.server.am;

		import static android.app.ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE;

		import static com.android.server.am.ActivityManagerService.Injector;
		import static com.android.server.am.CachedAppOptimizer.compactActionIntToString;

		import static com.google.common.truth.Truth.assertThat;

		import static org.mockito.Mockito.doReturn;
		import static org.mockito.Mockito.spy;

		import android.content.ComponentName;
		import android.content.Context;
		import android.content.pm.ApplicationInfo;
		import android.content.pm.PackageManagerInternal;
		import android.os.Handler;
		import android.os.HandlerThread;
		import android.os.MessageQueue;
		import android.os.Process;
		import android.platform.test.annotations.Presubmit;
		import android.provider.DeviceConfig;
		@@ -31,9 +40,11 @@ import android.text.TextUtils;

		import androidx.test.platform.app.InstrumentationRegistry;

		import com.android.server.LocalServices;
		import com.android.server.ServiceThread;
		import com.android.server.appop.AppOpsService;
		import com.android.server.testables.TestableDeviceConfig;
		import com.android.server.wm.ActivityTaskManagerService;

		import org.junit.After;
		import org.junit.Assume;
		@@ -45,6 +56,7 @@ import org.mockito.Mock;
		import org.mockito.junit.MockitoJUnitRunner;

		import java.io.File;
		import java.io.IOException;
		import java.util.HashSet;
		import java.util.Set;
		import java.util.concurrent.CountDownLatch;
		@@ -68,25 +80,36 @@ public final class CachedAppOptimizerTest {
		private HandlerThread mHandlerThread;
		private Handler mHandler;
		private CountDownLatch mCountDown;
		private ActivityManagerService mAms;
		private Context mContext;
		private TestInjector mInjector;
		private TestProcessDependencies mProcessDependencies;

		@Mock
		private PackageManagerInternal mPackageManagerInt;

		@Rule
		public TestableDeviceConfig.TestableDeviceConfigRule
		public final TestableDeviceConfig.TestableDeviceConfigRule
		mDeviceConfigRule = new TestableDeviceConfig.TestableDeviceConfigRule();
		@Rule
		public final ApplicationExitInfoTest.ServiceThreadRule
		mServiceThreadRule = new ApplicationExitInfoTest.ServiceThreadRule();

		@Before
		public void setUp() {
		mHandlerThread = new HandlerThread("");
		mHandlerThread.start();
		mHandler = new Handler(mHandlerThread.getLooper());

		mThread = new ServiceThread("TestServiceThread", Process.THREAD_PRIORITY_DEFAULT,
		true /* allowIo */);
		mThread.start();

		ActivityManagerService ams = new ActivityManagerService(
		new TestInjector(InstrumentationRegistry.getInstrumentation().getContext()),
		mThread);
		mCachedAppOptimizerUnderTest = new CachedAppOptimizer(ams,
		mContext = InstrumentationRegistry.getInstrumentation().getContext();
		mInjector = new TestInjector(mContext);
		mAms = new ActivityManagerService(
		new TestInjector(mContext), mServiceThreadRule.getThread());
		doReturn(new ComponentName("", "")).when(mPackageManagerInt).getSystemUiServiceComponent();
		mProcessDependencies = new TestProcessDependencies();
		mCachedAppOptimizerUnderTest = new CachedAppOptimizer(mAms,
		new CachedAppOptimizer.PropertyChangedCallbackForTest() {
		@Override
		public void onPropertyChanged() {
		@@ -94,7 +117,9 @@ public final class CachedAppOptimizerTest {
		mCountDown.countDown();
		}
		}
		});
		}, mProcessDependencies);
		LocalServices.removeServiceForTest(PackageManagerInternal.class);
		LocalServices.addService(PackageManagerInternal.class, mPackageManagerInt);
		}

		@After
		@@ -104,6 +129,19 @@ public final class CachedAppOptimizerTest {
		mCountDown = null;
		}

		private ProcessRecord makeProcessRecord(int pid, int uid, int packageUid, String processName,
		String packageName) {
		ApplicationInfo ai = new ApplicationInfo();
		ai.packageName = packageName;
		ProcessRecord app = new ProcessRecord(mAms, ai, processName, uid);
		app.pid = pid;
		app.info.uid = packageUid;
		// Exact value does not mater, it can be any state for which compaction is allowed.
		app.setProcState = PROCESS_STATE_BOUND_FOREGROUND_SERVICE;
		app.setAdj = 905;
		return app;
		}

		@Test
		public void init_setsDefaults() {
		mCachedAppOptimizerUnderTest.init();
		@@ -790,6 +828,174 @@ public final class CachedAppOptimizerTest {
		.containsExactlyElementsIn(expected);
		}

		@Test
		public void processWithDeltaRSSTooSmall_notFullCompacted() throws Exception {
		// Initialize CachedAppOptimizer and set flags to (1) enable compaction, (2) set RSS
		// throttle to 12000.
		mCachedAppOptimizerUnderTest.init();
		setFlag(CachedAppOptimizer.KEY_USE_COMPACTION, "true", true);
		setFlag(CachedAppOptimizer.KEY_COMPACT_FULL_DELTA_RSS_THROTTLE_KB, "12000", false);
		initActivityManagerService();

		// Simulate RSS anon memory larger than throttle.
		long[] rssBefore1 =
		new long[]{/totalRSS/ 10000, /fileRSS/ 10000, /anonRSS/ 12000, /swap/
		10000};
		long[] rssAfter1 =
		new long[]{/totalRSS/ 9000, /fileRSS/ 9000, /anonRSS/ 11000, /swap/9000};
		// Delta between rssAfter1 and rssBefore2 is below threshold (500).
		long[] rssBefore2 =
		new long[]{/totalRSS/ 9500, /fileRSS/ 9500, /anonRSS/ 11500, /swap/9500};
		long[] rssAfter2 =
		new long[]{/totalRSS/ 8000, /fileRSS/ 8000, /anonRSS/ 9000, /swap/8000};
		// Delta between rssAfter1 and rssBefore3 is above threshold (13000).
		long[] rssBefore3 =
		new long[]{/totalRSS/ 10000, /fileRSS/ 18000, /anonRSS/ 13000, /swap/ 7000};
		long[] rssAfter3 =
		new long[]{/totalRSS/ 10000, /fileRSS/ 11000, /anonRSS/ 10000, /swap/ 6000};
		long[] valuesAfter = {};
		// Process that passes properties.
		int pid = 1;
		ProcessRecord processRecord = makeProcessRecord(pid, 2, 3, "p1", "app1");

		// GIVEN we simulate RSS memory before above thresholds and it is the first time 'p1' is
		// compacted.
		mProcessDependencies.setRss(rssBefore1);
		mProcessDependencies.setRssAfterCompaction(rssAfter1); //
		// WHEN we try to run compaction
		mCachedAppOptimizerUnderTest.compactAppFull(processRecord);
		waitForHandler();
		// THEN process IS compacted.
		assertThat(mCachedAppOptimizerUnderTest.mLastCompactionStats.get(pid)).isNotNull();
		valuesAfter = mCachedAppOptimizerUnderTest.mLastCompactionStats.get(
		pid).getRssAfterCompaction();
		assertThat(valuesAfter).isEqualTo(rssAfter1);

		// WHEN delta is below threshold (500).
		mProcessDependencies.setRss(rssBefore2);
		mProcessDependencies.setRssAfterCompaction(rssAfter2);
		// This is to avoid throttle of compacting too soon.
		processRecord.lastCompactTime = processRecord.lastCompactTime - 10_000;
		// WHEN we try to run compaction.
		mCachedAppOptimizerUnderTest.compactAppFull(processRecord);
		waitForHandler();
		// THEN process IS NOT compacted - values after compaction for process 1 should remain the
		// same as from the last compaction.
		assertThat(mCachedAppOptimizerUnderTest.mLastCompactionStats.get(pid)).isNotNull();
		valuesAfter = mCachedAppOptimizerUnderTest.mLastCompactionStats.get(
		pid).getRssAfterCompaction();
		assertThat(valuesAfter).isEqualTo(rssAfter1);

		// WHEN delta is above threshold (13000).
		mProcessDependencies.setRss(rssBefore3);
		mProcessDependencies.setRssAfterCompaction(rssAfter3);
		// This is to avoid throttle of compacting too soon.
		processRecord.lastCompactTime = processRecord.lastCompactTime - 10_000;
		// WHEN we try to run compaction
		mCachedAppOptimizerUnderTest.compactAppFull(processRecord);
		waitForHandler();
		// THEN process IS compacted - values after compaction for process 1 should be updated.
		assertThat(mCachedAppOptimizerUnderTest.mLastCompactionStats.get(pid)).isNotNull();
		valuesAfter = mCachedAppOptimizerUnderTest.mLastCompactionStats.get(
		pid).getRssAfterCompaction();
		assertThat(valuesAfter).isEqualTo(rssAfter3);

		}

		@Test
		public void processWithAnonRSSTooSmall_notFullCompacted() throws Exception {
		// Initialize CachedAppOptimizer and set flags to (1) enable compaction, (2) set RSS
		// throttle to 8000.
		mCachedAppOptimizerUnderTest.init();
		setFlag(CachedAppOptimizer.KEY_USE_COMPACTION, "true", true);
		setFlag(CachedAppOptimizer.KEY_COMPACT_FULL_RSS_THROTTLE_KB, "8000", false);
		initActivityManagerService();

		// Simulate RSS anon memory larger than throttle.
		long[] rssBelowThreshold =
		new long[]{/Total RSS/ 10000, /File RSS/ 10000, /Anon RSS/ 7000, /Swap/
		10000};
		long[] rssBelowThresholdAfter =
		new long[]{/Total RSS/ 9000, /File RSS/ 7000, /Anon RSS/ 4000, /Swap/
		8000};
		long[] rssAboveThreshold =
		new long[]{/Total RSS/ 10000, /File RSS/ 10000, /Anon RSS/ 9000, /Swap/
		10000};
		long[] rssAboveThresholdAfter =
		new long[]{/Total RSS/ 8000, /File RSS/ 9000, /Anon RSS/ 6000, /Swap/5000};
		// Process that passes properties.
		int pid = 1;
		ProcessRecord processRecord =
		makeProcessRecord(pid, 2, 3, "p1",
		"app1");

		// GIVEN we simulate RSS memory before below threshold.
		mProcessDependencies.setRss(rssBelowThreshold);
		mProcessDependencies.setRssAfterCompaction(rssBelowThresholdAfter);
		// WHEN we try to run compaction
		mCachedAppOptimizerUnderTest.compactAppFull(processRecord);
		waitForHandler();
		// THEN process IS NOT compacted.
		assertThat(mCachedAppOptimizerUnderTest.mLastCompactionStats.get(pid)).isNull();

		// GIVEN we simulate RSS memory before above threshold.
		mProcessDependencies.setRss(rssAboveThreshold);
		mProcessDependencies.setRssAfterCompaction(rssAboveThresholdAfter);
		// WHEN we try to run compaction
		mCachedAppOptimizerUnderTest.compactAppFull(processRecord);
		waitForHandler();
		// THEN process IS compacted.
		assertThat(mCachedAppOptimizerUnderTest.mLastCompactionStats.get(pid)).isNotNull();
		long[] valuesAfter = mCachedAppOptimizerUnderTest.mLastCompactionStats.get(
		pid).getRssAfterCompaction();
		assertThat(valuesAfter).isEqualTo(rssAboveThresholdAfter);
		}


		private void setFlag(String key, String value, boolean defaultValue) throws Exception {
		mCountDown = new CountDownLatch(1);
		DeviceConfig.setProperty(DeviceConfig.NAMESPACE_ACTIVITY_MANAGER, key, value, defaultValue);
		assertThat(mCountDown.await(5, TimeUnit.SECONDS)).isTrue();
		}

		private void waitForHandler() {
		Idle idle = new Idle();
		mCachedAppOptimizerUnderTest.mCompactionHandler.getLooper().getQueue().addIdleHandler(idle);
		mCachedAppOptimizerUnderTest.mCompactionHandler.post(() -> { });
		idle.waitForIdle();
		}

		private void initActivityManagerService() {
		mAms = new ActivityManagerService(mInjector, mServiceThreadRule.getThread());
		mAms.mActivityTaskManager = new ActivityTaskManagerService(mContext);
		mAms.mActivityTaskManager.initialize(null, null, mContext.getMainLooper());
		mAms.mAtmInternal = spy(mAms.mActivityTaskManager.getAtmInternal());
		mAms.mPackageManagerInt = mPackageManagerInt;
		}

		private static final class Idle implements MessageQueue.IdleHandler {
		private boolean mIdle;

		@Override
		public boolean queueIdle() {
		synchronized (this) {
		mIdle = true;
		notifyAll();
		}
		return false;
		}

		public synchronized void waitForIdle() {
		while (!mIdle) {
		try {
		// Wait with a timeout of 10s.
		wait(10000);
		} catch (InterruptedException e) {
		}
		}
		}
		}

		private class TestInjector extends Injector {

		TestInjector(Context context) {
		@@ -806,4 +1012,29 @@ public final class CachedAppOptimizerTest {
		return mHandler;
		}
		}

		// Test implementation for ProcessDependencies.
		private static final class TestProcessDependencies
		implements CachedAppOptimizer.ProcessDependencies {
		private long[] mRss;
		private long[] mRssAfterCompaction;

		@Override
		public long[] getRss(int pid) {
		return mRss;
		}

		@Override
		public void performCompaction(String action, int pid) throws IOException {
		mRss = mRssAfterCompaction;
		}

		public void setRss(long[] newValues) {
		mRss = newValues;
		}

		public void setRssAfterCompaction(long[] newValues) {
		mRssAfterCompaction = newValues;
		}
		}
		}