Log app start to statsd (bbefdec6) · Commits · e / os / android_frameworks_base

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

+42 −4

Original line number	Diff line number	Diff line
		@@ -32,6 +32,8 @@ import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.TYPE_T
		import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_METRICS;
		import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM;
		import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME;
		import static com.android.server.am.MemoryStatUtil.MemoryStat;
		import static com.android.server.am.MemoryStatUtil.readMemoryStatFromMemcg;

		import android.content.Context;
		import android.metrics.LogMaker;
		@@ -67,6 +69,7 @@ class ActivityMetricsLogger {
		private static final long INVALID_START_TIME = -1;

		private static final int MSG_CHECK_VISIBILITY = 0;
		private static final int MSG_LOG_APP_START_MEMORY_STATE_CAPTURE = 1;

		// Preallocated strings we are sending to tron, so we don't have to allocate a new one every
		// time we log.
		@@ -102,6 +105,9 @@ class ActivityMetricsLogger {
		final SomeArgs args = (SomeArgs) msg.obj;
		checkVisibility((TaskRecord) args.arg1, (ActivityRecord) args.arg2);
		break;
		case MSG_LOG_APP_START_MEMORY_STATE_CAPTURE:
		logAppStartMemoryStateCapture((StackTransitionInfo) msg.obj);
		break;
		}
		}
		};
		@@ -187,10 +193,7 @@ class ActivityMetricsLogger {
		* @param launchedActivity the activity that is being launched
		*/
		void notifyActivityLaunched(int resultCode, ActivityRecord launchedActivity) {
		final ProcessRecord processRecord = launchedActivity != null
		? mSupervisor.mService.mProcessNames.get(launchedActivity.processName,
		launchedActivity.appInfo.uid)
		: null;
		final ProcessRecord processRecord = findProcessForActivity(launchedActivity);
		final boolean processRunning = processRecord != null;

		// We consider this a "process switch" if the process of the activity that gets launched
		@@ -492,6 +495,7 @@ class ActivityMetricsLogger {
		info.bindApplicationDelayMs,
		info.windowsDrawnDelayMs,
		launchToken);
		mHandler.obtainMessage(MSG_LOG_APP_START_MEMORY_STATE_CAPTURE, info).sendToTarget();
		}
		}

		@@ -548,4 +552,38 @@ class ActivityMetricsLogger {
		}
		return -1;
		}

		private void logAppStartMemoryStateCapture(StackTransitionInfo info) {
		final ProcessRecord processRecord = findProcessForActivity(info.launchedActivity);
		if (processRecord == null) {
		if (DEBUG_METRICS) Slog.i(TAG, "logAppStartMemoryStateCapture processRecord null");
		return;
		}

		final int pid = processRecord.pid;
		final int uid = info.launchedActivity.appInfo.uid;
		final MemoryStat memoryStat = readMemoryStatFromMemcg(uid, pid);
		if (memoryStat == null) {
		if (DEBUG_METRICS) Slog.i(TAG, "logAppStartMemoryStateCapture memoryStat null");
		return;
		}

		StatsLog.write(
		StatsLog.APP_START_MEMORY_STATE_CAPTURED,
		uid,
		info.launchedActivity.processName,
		info.launchedActivity.info.name,
		memoryStat.pgfault,
		memoryStat.pgmajfault,
		memoryStat.rssInBytes,
		memoryStat.cacheInBytes,
		memoryStat.swapInBytes);
		}

		private ProcessRecord findProcessForActivity(ActivityRecord launchedActivity) {
		return launchedActivity != null
		? mSupervisor.mService.mProcessNames.get(launchedActivity.processName,
		launchedActivity.appInfo.uid)
		: null;
		}
		}

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

0 → 100644

+109 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2018 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.server.am;

		import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_METRICS;
		import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM;
		import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME;

		import android.annotation.Nullable;
		import android.os.FileUtils;
		import android.util.Slog;

		import com.android.internal.annotations.VisibleForTesting;

		import java.io.File;
		import java.io.IOException;
		import java.util.ArrayList;
		import java.util.regex.Matcher;
		import java.util.regex.Pattern;

		/**
		* Static utility methods related to {@link MemoryStat}.
		*/
		final class MemoryStatUtil {
		private static final String TAG = TAG_WITH_CLASS_NAME ? "MemoryStatUtil" : TAG_AM;

		/** Path to memory stat file for logging app start memory state */
		private static final String MEMORY_STAT_FILE_FMT = "/dev/memcg/apps/uid_%d/pid_%d/memory.stat";

		private static final Pattern PGFAULT = Pattern.compile("total_pgfault (\\d+)");
		private static final Pattern PGMAJFAULT = Pattern.compile("total_pgmajfault (\\d+)");
		private static final Pattern RSS_IN_BYTES = Pattern.compile("total_rss (\\d+)");
		private static final Pattern CACHE_IN_BYTES = Pattern.compile("total_cache (\\d+)");
		private static final Pattern SWAP_IN_BYTES = Pattern.compile("total_swap (\\d+)");

		private MemoryStatUtil() {}

		/**
		* Reads memory.stat of a process from memcg.
		*/
		static @Nullable MemoryStat readMemoryStatFromMemcg(int uid, int pid) {
		final String memoryStatPath = String.format(MEMORY_STAT_FILE_FMT, uid, pid);
		final File memoryStatFile = new File(memoryStatPath);
		if (!memoryStatFile.exists()) {
		if (DEBUG_METRICS) Slog.i(TAG, memoryStatPath + " not found");
		return null;
		}

		try {
		final String memoryStatContents = FileUtils.readTextFile(
		memoryStatFile, 0 /* max /, null / ellipsis */);
		return parseMemoryStat(memoryStatContents);
		} catch (IOException e) {
		Slog.e(TAG, "Failed to read file:", e);
		return null;
		}
		}

		/**
		* Parses relevant statistics out from the contents of a memory.stat file in memcg.
		*/
		@VisibleForTesting(visibility = VisibleForTesting.Visibility.PRIVATE)
		static @Nullable MemoryStat parseMemoryStat(String memoryStatContents) {
		MemoryStat memoryStat = new MemoryStat();
		if (memoryStatContents == null) {
		return memoryStat;
		}

		Matcher m;
		m = PGFAULT.matcher(memoryStatContents);
		memoryStat.pgfault = m.find() ? Long.valueOf(m.group(1)) : 0;
		m = PGMAJFAULT.matcher(memoryStatContents);
		memoryStat.pgmajfault = m.find() ? Long.valueOf(m.group(1)) : 0;
		m = RSS_IN_BYTES.matcher(memoryStatContents);
		memoryStat.rssInBytes = m.find() ? Long.valueOf(m.group(1)) : 0;
		m = CACHE_IN_BYTES.matcher(memoryStatContents);
		memoryStat.cacheInBytes = m.find() ? Long.valueOf(m.group(1)) : 0;
		m = SWAP_IN_BYTES.matcher(memoryStatContents);
		memoryStat.swapInBytes = m.find() ? Long.valueOf(m.group(1)) : 0;
		return memoryStat;
		}

		static final class MemoryStat {
		/** Number of page faults */
		long pgfault;
		/** Number of major page faults */
		long pgmajfault;
		/** Number of bytes of anonymous and swap cache memory */
		long rssInBytes;
		/** Number of bytes of page cache memory */
		long cacheInBytes;
		/** Number of bytes of swap usage */
		long swapInBytes;
		}
		}

services/tests/servicestests/src/com/android/server/am/MemoryStatUtilTest.java

0 → 100644

+95 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2018 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.server.am;

		import static com.android.server.am.MemoryStatUtil.parseMemoryStat;
		import static com.android.server.am.MemoryStatUtil.MemoryStat;

		import static org.junit.Assert.assertEquals;

		import android.support.test.filters.SmallTest;
		import android.support.test.runner.AndroidJUnit4;

		import org.junit.Test;
		import org.junit.runner.RunWith;

		@RunWith(AndroidJUnit4.class)
		@SmallTest
		public class MemoryStatUtilTest {
		private String MEMORY_STAT_CONTENTS = String.join(
		"\n",
		"cache 96", // keep different from total_cache to catch reading wrong value
		"rss 97", // keep different from total_rss to catch reading wrong value
		"rss_huge 0",
		"mapped_file 524288",
		"writeback 0",
		"swap 95", // keep different from total_rss to catch reading wrong value
		"pgpgin 16717",
		"pgpgout 5037",
		"pgfault 99", // keep different from total_pgfault to catch reading wrong value
		"pgmajfault 98", // keep different from total_pgmajfault to catch reading wrong value
		"inactive_anon 503808",
		"active_anon 46309376",
		"inactive_file 876544",
		"active_file 81920",
		"unevictable 0",
		"hierarchical_memory_limit 18446744073709551615",
		"hierarchical_memsw_limit 18446744073709551615",
		"total_cache 4",
		"total_rss 3",
		"total_rss_huge 0",
		"total_mapped_file 524288",
		"total_writeback 0",
		"total_swap 5",
		"total_pgpgin 16717",
		"total_pgpgout 5037",
		"total_pgfault 1",
		"total_pgmajfault 2",
		"total_inactive_anon 503808",
		"total_active_anon 46309376",
		"total_inactive_file 876544",
		"total_active_file 81920",
		"total_unevictable 0");


		@Test
		public void testParseMemoryStat_parsesCorrectValues() throws Exception {
		MemoryStat stat = parseMemoryStat(MEMORY_STAT_CONTENTS);
		assertEquals(stat.pgfault, 1);
		assertEquals(stat.pgmajfault, 2);
		assertEquals(stat.rssInBytes, 3);
		assertEquals(stat.cacheInBytes, 4);
		assertEquals(stat.swapInBytes, 5);
		}

		@Test
		public void testParseMemoryStat_emptyMemoryStatContents() throws Exception {
		MemoryStat stat = parseMemoryStat("");
		assertEquals(stat.pgfault, 0);
		assertEquals(stat.pgmajfault, 0);
		assertEquals(stat.rssInBytes, 0);
		assertEquals(stat.cacheInBytes, 0);
		assertEquals(stat.swapInBytes, 0);

		stat = parseMemoryStat(null);
		assertEquals(stat.pgfault, 0);
		assertEquals(stat.pgmajfault, 0);
		assertEquals(stat.rssInBytes, 0);
		assertEquals(stat.cacheInBytes, 0);
		assertEquals(stat.swapInBytes, 0);
		}
		}