Log app start to statsd
Bug: 72713338
Test: manual, open app, logcat -b stats
Change-Id: Ic5dc74a637601df443de29eb6f13bd63dd03c6e7
diff --git a/services/core/java/com/android/server/am/ActivityMetricsLogger.java b/services/core/java/com/android/server/am/ActivityMetricsLogger.java
index 66f0592..e2ceb31 100644
--- a/services/core/java/com/android/server/am/ActivityMetricsLogger.java
+++ b/services/core/java/com/android/server/am/ActivityMetricsLogger.java
@@ -32,6 +32,8 @@
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 @@
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 @@
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 @@
* @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 @@
info.bindApplicationDelayMs,
info.windowsDrawnDelayMs,
launchToken);
+ mHandler.obtainMessage(MSG_LOG_APP_START_MEMORY_STATE_CAPTURE, info).sendToTarget();
}
}
@@ -548,4 +552,38 @@
}
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;
+ }
}
diff --git a/services/core/java/com/android/server/am/MemoryStatUtil.java b/services/core/java/com/android/server/am/MemoryStatUtil.java
new file mode 100644
index 0000000..d97c2a2
--- /dev/null
+++ b/services/core/java/com/android/server/am/MemoryStatUtil.java
@@ -0,0 +1,109 @@
+/*
+ * 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;
+ }
+}