AppStartInfo monitoring mode (42945dc8) · Commits · e / os / android_frameworks_base

core/proto/android/server/activitymanagerservice.proto

+1 −0

Original line number	Diff line number	Diff line
		@@ -1059,6 +1059,7 @@ message AppsStartInfoProto {

		optional int32 uid = 1;
		repeated .android.app.ApplicationStartInfoProto app_start_info = 2;
		optional bool monitoring_enabled = 3;
		}
		repeated User users = 2;
		}

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

+28 −0

Original line number	Diff line number	Diff line
		@@ -281,6 +281,8 @@ final class ActivityManagerShellCommand extends ShellCommand {
		return runClearWatchHeap(pw);
		case "clear-start-info":
		return runClearStartInfo(pw);
		case "start-info-detailed-monitoring":
		return runStartInfoDetailedMonitoring(pw);
		case "clear-exit-info":
		return runClearExitInfo(pw);
		case "bug-report":
		@@ -1415,6 +1417,29 @@ final class ActivityManagerShellCommand extends ShellCommand {
		return 0;
		}

		int runStartInfoDetailedMonitoring(PrintWriter pw) throws RemoteException {
		String opt;
		int userId = UserHandle.USER_CURRENT;
		while ((opt = getNextOption()) != null) {
		if (opt.equals("--user")) {
		userId = UserHandle.parseUserArg(getNextArgRequired());
		} else {
		getErrPrintWriter().println("Error: Unknown option: " + opt);
		return -1;
		}
		}
		if (userId == UserHandle.USER_CURRENT) {
		UserInfo user = mInterface.getCurrentUser();
		if (user == null) {
		return -1;
		}
		userId = user.id;
		}
		mInternal.mProcessList.getAppStartInfoTracker()
		.configureDetailedMonitoring(pw, getNextArg(), userId);
		return 0;
		}

		int runClearExitInfo(PrintWriter pw) throws RemoteException {
		mInternal.enforceCallingPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS,
		"runClearExitInfo()");
		@@ -4358,6 +4383,9 @@ final class ActivityManagerShellCommand extends ShellCommand {
		pw.println(" Clear the previously set-watch-heap.");
		pw.println(" clear-start-info [--user <USER_ID> \| all \| current] [package]");
		pw.println(" Clear the process start-info for given package");
		pw.println(" start-info-detailed-monitoring [--user <USER_ID> \| all \| current] <PACKAGE>");
		pw.println(" Enable application start info detailed monitoring for the given package.");
		pw.println(" Disable if no package is supplied.");
		pw.println(" clear-exit-info [--user <USER_ID> \| all \| current] [package]");
		pw.println(" Clear the process exit-info for given package");
		pw.println(" bug-report [--progress \| --telephony]");

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

+124 −2

Original line number	Diff line number	Diff line
		@@ -65,6 +65,7 @@ import java.util.ArrayList;
		import java.util.Collections;
		import java.util.Date;
		import java.util.List;
		import java.util.Map;
		import java.util.Optional;
		import java.util.concurrent.TimeUnit;
		import java.util.concurrent.atomic.AtomicBoolean;
		@@ -82,8 +83,12 @@ public final class AppStartInfoTracker {
		private static final int FOREACH_ACTION_REMOVE_ITEM = 1;
		private static final int FOREACH_ACTION_STOP_ITERATION = 2;

		private static final String MONITORING_MODE_EMPTY_TEXT = "No records";

		@VisibleForTesting static final int APP_START_INFO_HISTORY_LIST_SIZE = 16;

		private static final int APP_START_INFO_MONITORING_MODE_LIST_SIZE = 100;

		@VisibleForTesting static final String APP_START_STORE_DIR = "procstartstore";

		@VisibleForTesting static final String APP_START_INFO_FILE = "procstartinfo";
		@@ -426,6 +431,40 @@ public final class AppStartInfoTracker {
		ApplicationStartInfo.START_TIMESTAMP_APPLICATION_ONCREATE);
		}

		/**
		* Helper functions for monitoring shell command.
		* > adb shell am start-info-detailed-monitoring [package-name]
		*/
		void configureDetailedMonitoring(PrintWriter pw, String packageName, int userId) {
		synchronized (mLock) {
		if (!mEnabled) {
		return;
		}

		forEachPackageLocked((name, records) -> {
		for (int i = 0; i < records.size(); i++) {
		records.valueAt(i).disableAppMonitoringMode();
		}
		return AppStartInfoTracker.FOREACH_ACTION_NONE;
		});

		if (TextUtils.isEmpty(packageName)) {
		pw.println("ActivityManager AppStartInfo detailed monitoring disabled");
		} else {
		SparseArray<AppStartInfoContainer> array = mData.getMap().get(packageName);
		if (array != null) {
		for (int i = 0; i < array.size(); i++) {
		array.valueAt(i).enableAppMonitoringModeForUser(userId);
		}
		pw.println("ActivityManager AppStartInfo detailed monitoring enabled for "
		+ packageName);
		} else {
		pw.println("Package " + packageName + " not found");
		}
		}
		}
		}

		/** Report a bind application timestamp to add to {@link ApplicationStartInfo}. */
		public void reportBindApplicationTimeNanos(ProcessRecord app, long timeNs) {
		addTimestampToStart(app, timeNs,
		@@ -1011,15 +1050,46 @@ public final class AppStartInfoTracker {

		/** A container class of (@link android.app.ApplicationStartInfo) */
		final class AppStartInfoContainer {
		private List<ApplicationStartInfo> mInfos; // Always kept sorted by first timestamp.
		private ArrayList<ApplicationStartInfo> mInfos; // Always kept sorted by first timestamp.
		private int mMaxCapacity;
		private int mUid;
		private boolean mMonitoringModeEnabled = false;

		AppStartInfoContainer(final int maxCapacity) {
		mInfos = new ArrayList<ApplicationStartInfo>();
		mMaxCapacity = maxCapacity;
		}

		int getMaxCapacity() {
		return mMonitoringModeEnabled ? APP_START_INFO_MONITORING_MODE_LIST_SIZE : mMaxCapacity;
		}

		@GuardedBy("mLock")
		void enableAppMonitoringModeForUser(int userId) {
		if (UserHandle.getUserId(mUid) == userId) {
		mMonitoringModeEnabled = true;
		}
		}

		@GuardedBy("mLock")
		void disableAppMonitoringMode() {
		mMonitoringModeEnabled = false;

		// Capacity is reduced by turning off monitoring mode. Check if array size is within
		// new lower limits and trim extraneous records if it is not.
		if (mInfos.size() <= getMaxCapacity()) {
		return;
		}

		// Sort records so we can remove the least recent ones.
		Collections.sort(mInfos, (a, b) ->
		Long.compare(getStartTimestamp(b), getStartTimestamp(a)));

		// Remove records and trim list object back to size.
		mInfos.subList(0, mInfos.size() - getMaxCapacity()).clear();
		mInfos.trimToSize();
		}

		@GuardedBy("mLock")
		void getStartInfoLocked(
		final int filterPid, final int maxNum, ArrayList<ApplicationStartInfo> results) {
		@@ -1029,7 +1099,7 @@ public final class AppStartInfoTracker {
		@GuardedBy("mLock")
		void addStartInfoLocked(ApplicationStartInfo info) {
		int size = mInfos.size();
		if (size >= mMaxCapacity) {
		if (size >= getMaxCapacity()) {
		// Remove oldest record if size is over max capacity.
		int oldestIndex = -1;
		long oldestTimeStamp = Long.MAX_VALUE;
		@@ -1061,12 +1131,59 @@ public final class AppStartInfoTracker {

		@GuardedBy("mLock")
		void dumpLocked(PrintWriter pw, String prefix, SimpleDateFormat sdf) {
		if (mMonitoringModeEnabled) {
		// For monitoring mode, calculate the average start time for each start state to
		// add to output.
		List<Long> coldStartTimes = new ArrayList<>();
		List<Long> warmStartTimes = new ArrayList<>();
		List<Long> hotStartTimes = new ArrayList<>();

		for (int i = 0; i < mInfos.size(); i++) {
		ApplicationStartInfo startInfo = mInfos.get(i);
		Map<Integer, Long> timestamps = startInfo.getStartupTimestamps();

		// Confirm required timestamps exist.
		if (timestamps.containsKey(ApplicationStartInfo.START_TIMESTAMP_LAUNCH)
		&& timestamps.containsKey(
		ApplicationStartInfo.START_TIMESTAMP_FIRST_FRAME)) {
		// Add timestamp to correct collection.
		long time = timestamps.get(ApplicationStartInfo.START_TIMESTAMP_FIRST_FRAME)
		- timestamps.get(ApplicationStartInfo.START_TIMESTAMP_LAUNCH);
		switch (startInfo.getStartType()) {
		case ApplicationStartInfo.START_TYPE_COLD:
		coldStartTimes.add(time);
		break;
		case ApplicationStartInfo.START_TYPE_WARM:
		warmStartTimes.add(time);
		break;
		case ApplicationStartInfo.START_TYPE_HOT:
		hotStartTimes.add(time);
		break;
		}
		}
		}

		pw.println(prefix + " Average Start Time in ns for Cold Starts: "
		+ (coldStartTimes.isEmpty() ? MONITORING_MODE_EMPTY_TEXT
		: calculateAverage(coldStartTimes)));
		pw.println(prefix + " Average Start Time in ns for Warm Starts: "
		+ (warmStartTimes.isEmpty() ? MONITORING_MODE_EMPTY_TEXT
		: calculateAverage(warmStartTimes)));
		pw.println(prefix + " Average Start Time in ns for Hot Starts: "
		+ (hotStartTimes.isEmpty() ? MONITORING_MODE_EMPTY_TEXT
		: calculateAverage(hotStartTimes)));
		}

		int size = mInfos.size();
		for (int i = 0; i < size; i++) {
		mInfos.get(i).dump(pw, prefix + " ", "#" + i, sdf);
		}
		}

		private long calculateAverage(List<Long> vals) {
		return (long) vals.stream().mapToDouble(a -> a).average().orElse(0.0);
		}

		@GuardedBy("mLock")
		void writeToProto(ProtoOutputStream proto, long fieldId) throws IOException {
		long token = proto.start(fieldId);
		@@ -1076,6 +1193,7 @@ public final class AppStartInfoTracker {
		mInfos.get(i)
		.writeToProto(proto, AppsStartInfoProto.Package.User.APP_START_INFO);
		}
		proto.write(AppsStartInfoProto.Package.User.MONITORING_ENABLED, mMonitoringModeEnabled);
		proto.end(token);
		}

		@@ -1094,6 +1212,10 @@ public final class AppStartInfoTracker {
		info.readFromProto(proto, AppsStartInfoProto.Package.User.APP_START_INFO);
		mInfos.add(info);
		break;
		case (int) AppsStartInfoProto.Package.User.MONITORING_ENABLED:
		mMonitoringModeEnabled = proto.readBoolean(
		AppsStartInfoProto.Package.User.MONITORING_ENABLED);
		break;
		}
		}
		proto.end(token);