startop: Add timestamps for IntentStarted and ActivityLaunchFinished.

The timestamps are used to compute duration of TotalTime and ReportFullyDrawn.

TotalTime = t(ActivityLaunchFinished) - t(IntentStarted)
ReportFullyDrawn = t(ReportFullyDrawn) - t(IntentStarted)

where t(x) is the timestamp of x.

Bug: 137786390
Bug: 137784595
Test: Make
Test: atest CtsWindowManagerDeviceTestCases:ActivityMetricsLoggerTests
Change-Id: I75c0be8508499dce186fd392e79b67b2fefc8842

11 files changed, 94 insertions, 68 deletions

diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 76132e45cddf..5501d35d6fdd 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -900,7 +900,7 @@ public class ActivityManagerService extends IActivityManager.Stub
 
         // The other observer methods are unused
         @Override
-        public void onIntentStarted(Intent intent) {
+        public void onIntentStarted(Intent intent, long timestampNs) {
         }
 
         @Override
@@ -912,11 +912,11 @@ public class ActivityManagerService extends IActivityManager.Stub
         }
 
         @Override
-        public void onActivityLaunchFinished(byte[] finalActivity) {
+        public void onActivityLaunchFinished(byte[] finalActivity, long timestampNs) {
         }
 
         @Override
-        public void onReportFullyDrawn(byte[] finalActivity, long timestampNanos) {
+        public void onReportFullyDrawn(byte[] finalActivity, long timestampNs) {
         }
     };
 
diff --git a/services/core/java/com/android/server/wm/ActivityMetricsLaunchObserver.java b/services/core/java/com/android/server/wm/ActivityMetricsLaunchObserver.java
index 11a65986f86d..c6b17e24b1de 100644
--- a/services/core/java/com/android/server/wm/ActivityMetricsLaunchObserver.java
+++ b/services/core/java/com/android/server/wm/ActivityMetricsLaunchObserver.java
@@ -116,7 +116,7 @@ public interface ActivityMetricsLaunchObserver {
      * Multiple calls to this method cannot occur without first terminating the current
      * launch sequence.
      */
-    public void onIntentStarted(@NonNull Intent intent);
+    public void onIntentStarted(@NonNull Intent intent, long timestampNanos);
 
     /**
      * Notifies the observer that the current launch sequence has failed to launch an activity.
@@ -182,6 +182,9 @@ public interface ActivityMetricsLaunchObserver {
      * drawn for the first time: the top-most activity at the time is what's reported here.
      *
      * @param finalActivity the top-most activity whose windows were first to fully draw
+     * @param timestampNanos the timestamp of ActivityLaunchFinished event in nanoseconds.
+     *        To compute the TotalTime duration, deduct the timestamp {@link #onIntentStarted}
+     *        from {@code timestampNanos}.
      *
      * Multiple calls to this method cannot occur without first terminating the current
      * launch sequence.
@@ -191,7 +194,8 @@ public interface ActivityMetricsLaunchObserver {
      *          and only the latest activity that was top-most during first-frame drawn
      *          is reported here.
      */
-    public void onActivityLaunchFinished(@NonNull @ActivityRecordProto byte[] finalActivity);
+    public void onActivityLaunchFinished(@NonNull @ActivityRecordProto byte[] finalActivity,
+                                         long timestampNanos);
 
     /**
      * Notifies the observer that the application self-reported itself as being fully drawn.
diff --git a/services/core/java/com/android/server/wm/ActivityMetricsLogger.java b/services/core/java/com/android/server/wm/ActivityMetricsLogger.java
index b6c62619c1c1..acb7a65d487b 100644
--- a/services/core/java/com/android/server/wm/ActivityMetricsLogger.java
+++ b/services/core/java/com/android/server/wm/ActivityMetricsLogger.java
@@ -133,8 +133,8 @@ class ActivityMetricsLogger {
 
     // set to INVALID_START_TIME in reset.
     // set to valid value in notifyActivityLaunching
-    private long mCurrentTransitionStartTime = INVALID_START_TIME;
-    private long mLastTransitionStartTime = INVALID_START_TIME;
+    private long mCurrentTransitionStartTimeNs = INVALID_START_TIME;
+    private long mLastTransitionStartTimeNs = INVALID_START_TIME;
 
     private int mCurrentTransitionDeviceUptime;
     private int mCurrentTransitionDelayMs;
@@ -327,12 +327,12 @@ class ActivityMetricsLogger {
                                       intent));
         }
 
-        if (mCurrentTransitionStartTime == INVALID_START_TIME) {
+        if (mCurrentTransitionStartTimeNs == INVALID_START_TIME) {
 
-            mCurrentTransitionStartTime = SystemClock.uptimeMillis();
-            mLastTransitionStartTime = mCurrentTransitionStartTime;
+            mCurrentTransitionStartTimeNs = SystemClock.elapsedRealtimeNanos();
+            mLastTransitionStartTimeNs = mCurrentTransitionStartTimeNs;
 
-            launchObserverNotifyIntentStarted(intent);
+            launchObserverNotifyIntentStarted(intent, mCurrentTransitionStartTimeNs);
         }
     }
 
@@ -383,14 +383,15 @@ class ActivityMetricsLogger {
                 ? launchedActivity.getWindowingMode()
                 : WINDOWING_MODE_UNDEFINED;
         final WindowingModeTransitionInfo info = mWindowingModeTransitionInfo.get(windowingMode);
-        if (mCurrentTransitionStartTime == INVALID_START_TIME) {
+        if (mCurrentTransitionStartTimeNs == INVALID_START_TIME) {
             // No transition is active ignore this launch.
             return;
         }
 
         if (launchedActivity != null && launchedActivity.mDrawn) {
             // Launched activity is already visible. We cannot measure windows drawn delay.
-            reset(true /* abort */, info, "launched activity already visible");
+            reset(true /* abort */, info, "launched activity already visible",
+                0L /* timestampNs */);
             return;
         }
 
@@ -408,7 +409,8 @@ class ActivityMetricsLogger {
         if ((!isLoggableResultCode(resultCode) || launchedActivity == null || !processSwitch
                 || windowingMode == WINDOWING_MODE_UNDEFINED) && !otherWindowModesLaunching) {
             // Failed to launch or it was not a process switch, so we don't care about the timing.
-            reset(true /* abort */, info, "failed to launch or not a process switch");
+            reset(true /* abort */, info, "failed to launch or not a process switch",
+                0L /* timestampNs */);
             return;
         } else if (otherWindowModesLaunching) {
             // Don't log this windowing mode but continue with the other windowing modes.
@@ -442,19 +444,20 @@ class ActivityMetricsLogger {
      * Notifies the tracker that all windows of the app have been drawn.
      */
     WindowingModeTransitionInfoSnapshot notifyWindowsDrawn(@WindowingMode int windowingMode,
-                                                           long timestamp) {
+                                                           long timestampNs) {
         if (DEBUG_METRICS) Slog.i(TAG, "notifyWindowsDrawn windowingMode=" + windowingMode);
 
         final WindowingModeTransitionInfo info = mWindowingModeTransitionInfo.get(windowingMode);
         if (info == null || info.loggedWindowsDrawn) {
             return null;
         }
-        info.windowsDrawnDelayMs = calculateDelay(timestamp);
+        info.windowsDrawnDelayMs = calculateDelay(timestampNs);
         info.loggedWindowsDrawn = true;
         final WindowingModeTransitionInfoSnapshot infoSnapshot =
                 new WindowingModeTransitionInfoSnapshot(info);
         if (allWindowsDrawn() && mLoggedTransitionStarting) {
-            reset(false /* abort */, info, "notifyWindowsDrawn - all windows drawn");
+            reset(false /* abort */, info, "notifyWindowsDrawn - all windows drawn",
+                timestampNs /* timestampNs */);
         }
         return infoSnapshot;
     }
@@ -477,7 +480,7 @@ class ActivityMetricsLogger {
      * @param windowingModeToReason A map from windowing mode to a reason integer, which must be on
      *                              of ActivityTaskManagerInternal.APP_TRANSITION_* reasons.
      */
-    void notifyTransitionStarting(SparseIntArray windowingModeToReason, long timestamp) {
+    void notifyTransitionStarting(SparseIntArray windowingModeToReason, long timestampNs) {
         if (!isAnyTransitionActive() || mLoggedTransitionStarting) {
             // Ignore calls to this made after a reset and prior to notifyActivityLaunching.
 
@@ -485,7 +488,7 @@ class ActivityMetricsLogger {
             return;
         }
         if (DEBUG_METRICS) Slog.i(TAG, "notifyTransitionStarting");
-        mCurrentTransitionDelayMs = calculateDelay(timestamp);
+        mCurrentTransitionDelayMs = calculateDelay(timestampNs);
         mLoggedTransitionStarting = true;
 
         WindowingModeTransitionInfo foundInfo = null;
@@ -502,7 +505,8 @@ class ActivityMetricsLogger {
         if (allWindowsDrawn()) {
             // abort metrics collection if we cannot find a matching transition.
             final boolean abortMetrics = foundInfo == null;
-            reset(abortMetrics, foundInfo, "notifyTransitionStarting - all windows drawn");
+            reset(abortMetrics, foundInfo, "notifyTransitionStarting - all windows drawn",
+                timestampNs /* timestampNs */);
         }
     }
 
@@ -568,7 +572,8 @@ class ActivityMetricsLogger {
             logAppTransitionCancel(info);
             mWindowingModeTransitionInfo.remove(r.getWindowingMode());
             if (mWindowingModeTransitionInfo.size() == 0) {
-                reset(true /* abort */, info, "notifyVisibilityChanged to invisible");
+                reset(true /* abort */, info, "notifyVisibilityChanged to invisible",
+                    0L /* timestampNs */);
             }
         }
     }
@@ -599,12 +604,16 @@ class ActivityMetricsLogger {
     }
 
     private boolean isAnyTransitionActive() {
-        return mCurrentTransitionStartTime != INVALID_START_TIME
+        return mCurrentTransitionStartTimeNs != INVALID_START_TIME
                 && mWindowingModeTransitionInfo.size() > 0;
     }
 
-    private void reset(boolean abort, WindowingModeTransitionInfo info, String cause) {
-        if (DEBUG_METRICS) Slog.i(TAG, "reset abort=" + abort + ",cause=" + cause);
+    private void reset(boolean abort, WindowingModeTransitionInfo info, String cause,
+        long timestampNs) {
+        if (DEBUG_METRICS) {
+            Slog.i(TAG,
+                "reset abort=" + abort + ",cause=" + cause + ",timestamp=" + timestampNs);
+        }
         if (!abort && isAnyTransitionActive()) {
             logAppTransitionMultiEvents();
         }
@@ -616,13 +625,13 @@ class ActivityMetricsLogger {
             if (abort) {
                 launchObserverNotifyActivityLaunchCancelled(info);
             } else {
-                launchObserverNotifyActivityLaunchFinished(info);
+                launchObserverNotifyActivityLaunchFinished(info, timestampNs);
             }
         } else {
             launchObserverNotifyIntentFailed();
         }
 
-        mCurrentTransitionStartTime = INVALID_START_TIME;
+        mCurrentTransitionStartTimeNs = INVALID_START_TIME;
         mCurrentTransitionDelayMs = INVALID_DELAY;
         mLoggedTransitionStarting = false;
         mWindowingModeTransitionInfo.clear();
@@ -630,12 +639,14 @@ class ActivityMetricsLogger {
 
     private int calculateCurrentDelay() {
         // Shouldn't take more than 25 days to launch an app, so int is fine here.
-        return (int) (SystemClock.uptimeMillis() - mCurrentTransitionStartTime);
+        return (int) TimeUnit.NANOSECONDS
+            .toMillis(SystemClock.elapsedRealtimeNanos() - mCurrentTransitionStartTimeNs);
     }
 
-    private int calculateDelay(long timestamp) {
+    private int calculateDelay(long timestampNs) {
         // Shouldn't take more than 25 days to launch an app, so int is fine here.
-        return (int) (timestamp - mCurrentTransitionStartTime);
+        return (int) TimeUnit.NANOSECONDS.toMillis(timestampNs -
+            mCurrentTransitionStartTimeNs);
     }
 
     private void logAppTransitionCancel(WindowingModeTransitionInfo info) {
@@ -680,7 +691,7 @@ class ActivityMetricsLogger {
             // Take a snapshot of the transition info before sending it to the handler for logging.
             // This will avoid any races with other operations that modify the ActivityRecord.
             final WindowingModeTransitionInfoSnapshot infoSnapshot =
-                    new WindowingModeTransitionInfoSnapshot(info);
+                     new WindowingModeTransitionInfoSnapshot(info);
             final int currentTransitionDeviceUptime = mCurrentTransitionDeviceUptime;
             final int currentTransitionDelayMs = mCurrentTransitionDelayMs;
             BackgroundThread.getHandler().post(() -> logAppTransition(
@@ -814,7 +825,7 @@ class ActivityMetricsLogger {
         builder.addTaggedData(FIELD_CLASS_NAME, r.info.name);
         long currentTimestampNs = SystemClock.elapsedRealtimeNanos();
         long startupTimeMs =
-            TimeUnit.NANOSECONDS.toMillis(currentTimestampNs) - mLastTransitionStartTime;
+            TimeUnit.NANOSECONDS.toMillis(currentTimestampNs - mLastTransitionStartTimeNs);
         builder.addTaggedData(APP_TRANSITION_REPORTED_DRAWN_MS, startupTimeMs);
         builder.setType(restoredFromBundle
                 ? TYPE_TRANSITION_REPORTED_DRAWN_WITH_BUNDLE
@@ -1013,12 +1024,12 @@ class ActivityMetricsLogger {
     }
 
     /** Notify the {@link ActivityMetricsLaunchObserver} that a new launch sequence has begun. */
-    private void launchObserverNotifyIntentStarted(Intent intent) {
+    private void launchObserverNotifyIntentStarted(Intent intent, long timestampNs) {
         Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
                 "MetricsLogger:launchObserverNotifyIntentStarted");
 
         // Beginning a launch is timing sensitive and so should be observed as soon as possible.
-        mLaunchObserver.onIntentStarted(intent);
+        mLaunchObserver.onIntentStarted(intent, timestampNs);
 
         Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
     }
@@ -1058,10 +1069,10 @@ class ActivityMetricsLogger {
     /**
      * Notifies the {@link ActivityMetricsLaunchObserver} the reportFullDrawn event.
      */
-    private void launchObserverNotifyReportFullyDrawn(ActivityRecord r, long timestampNanos) {
+    private void launchObserverNotifyReportFullyDrawn(ActivityRecord r, long timestampNs) {
         Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
             "MetricsLogger:launchObserverNotifyReportFullyDrawn");
-        mLaunchObserver.onReportFullyDrawn(convertActivityRecordToProto(r), timestampNanos);
+        mLaunchObserver.onReportFullyDrawn(convertActivityRecordToProto(r), timestampNs);
         Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
     }
 
@@ -1085,12 +1096,14 @@ class ActivityMetricsLogger {
      * Notify the {@link ActivityMetricsLaunchObserver} that the current launch sequence's activity
      * has fully finished (successfully).
      */
-    private void launchObserverNotifyActivityLaunchFinished(WindowingModeTransitionInfo info) {
+    private void launchObserverNotifyActivityLaunchFinished(WindowingModeTransitionInfo info,
+        long timestampNs) {
         Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
                 "MetricsLogger:launchObserverNotifyActivityLaunchFinished");
 
-        mLaunchObserver.onActivityLaunchFinished(
-                convertActivityRecordToProto(info.launchedActivity));
+        mLaunchObserver
+            .onActivityLaunchFinished(convertActivityRecordToProto(info.launchedActivity),
+                timestampNs);
 
         Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
     }
diff --git a/services/core/java/com/android/server/wm/ActivityRecord.java b/services/core/java/com/android/server/wm/ActivityRecord.java
index 4f52d9df817a..21cc2634a479 100644
--- a/services/core/java/com/android/server/wm/ActivityRecord.java
+++ b/services/core/java/com/android/server/wm/ActivityRecord.java
@@ -3102,7 +3102,7 @@ final class ActivityRecord extends AppWindowToken {
 
     void reportFullyDrawnLocked(boolean restoredFromBundle) {
         final WindowingModeTransitionInfoSnapshot info = mStackSupervisor
-                .getActivityMetricsLogger().logAppTransitionReportedDrawn(this, restoredFromBundle);
+            .getActivityMetricsLogger().logAppTransitionReportedDrawn(this, restoredFromBundle);
         if (info != null) {
             mStackSupervisor.reportActivityLaunchedLocked(false /* timeout */, this,
                     info.windowsFullyDrawnDelayMs, info.getLaunchState());
@@ -3110,13 +3110,13 @@ final class ActivityRecord extends AppWindowToken {
     }
 
     /** Called when the windows associated app window container are drawn. */
-    void onWindowsDrawn(boolean drawn, long timestamp) {
+    void onWindowsDrawn(boolean drawn, long timestampNs) {
         mDrawn = drawn;
         if (!drawn) {
             return;
         }
         final WindowingModeTransitionInfoSnapshot info = mStackSupervisor
-                .getActivityMetricsLogger().notifyWindowsDrawn(getWindowingMode(), timestamp);
+            .getActivityMetricsLogger().notifyWindowsDrawn(getWindowingMode(), timestampNs);
         final int windowsDrawnDelayMs = info != null ? info.windowsDrawnDelayMs : INVALID_DELAY;
         final @LaunchState int launchState = info != null ? info.getLaunchState() : -1;
         mStackSupervisor.reportActivityLaunchedLocked(false /* timeout */, this,
diff --git a/services/core/java/com/android/server/wm/ActivityTaskManagerInternal.java b/services/core/java/com/android/server/wm/ActivityTaskManagerInternal.java
index ab35652eb525..0488a3b7065b 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskManagerInternal.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskManagerInternal.java
@@ -159,10 +159,10 @@ public abstract class ActivityTaskManagerInternal {
      *
      * @param reasons A map from windowing mode to a reason integer why the transition was started,
      *                which must be one of the APP_TRANSITION_* values.
-     * @param timestamp The time at which the app transition started in
-     *                  {@link SystemClock#uptimeMillis()} timebase.
+     * @param timestampNs The time at which the app transition started in
+     *                  {@link SystemClock#elapsedRealtimeNs()} ()} timebase.
      */
-    public abstract void notifyAppTransitionStarting(SparseIntArray reasons, long timestamp);
+    public abstract void notifyAppTransitionStarting(SparseIntArray reasons, long timestampNs);
 
     /**
      * Callback for window manager to let activity manager know that the app transition was
diff --git a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
index 750fc6832627..423e010e7b94 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
@@ -6026,10 +6026,10 @@ public class ActivityTaskManagerService extends IActivityTaskManager.Stub {
 
         @Override
         public void notifyAppTransitionStarting(SparseIntArray reasons,
-                long timestamp) {
+                long timestampNs) {
             synchronized (mGlobalLock) {
                 mStackSupervisor.getActivityMetricsLogger().notifyTransitionStarting(
-                        reasons, timestamp);
+                        reasons, timestampNs);
             }
         }
 
diff --git a/services/core/java/com/android/server/wm/AppTransitionController.java b/services/core/java/com/android/server/wm/AppTransitionController.java
index 20a871baada4..96b7ca30015a 100644
--- a/services/core/java/com/android/server/wm/AppTransitionController.java
+++ b/services/core/java/com/android/server/wm/AppTransitionController.java
@@ -212,7 +212,7 @@ public class AppTransitionController {
         mDisplayContent.computeImeTarget(true /* updateImeTarget */);
 
         mService.mAtmInternal.notifyAppTransitionStarting(mTempTransitionReasons.clone(),
-                SystemClock.uptimeMillis());
+            SystemClock.elapsedRealtimeNanos());
 
         if (transit == TRANSIT_SHOW_SINGLE_TASK_DISPLAY) {
             mService.mAnimator.addAfterPrepareSurfacesRunnable(() -> {
diff --git a/services/core/java/com/android/server/wm/AppWindowToken.java b/services/core/java/com/android/server/wm/AppWindowToken.java
index a261341cfa53..700099c8beff 100644
--- a/services/core/java/com/android/server/wm/AppWindowToken.java
+++ b/services/core/java/com/android/server/wm/AppWindowToken.java
@@ -512,7 +512,7 @@ class AppWindowToken extends WindowToken implements WindowManagerService.AppFree
         if (DEBUG_VISIBILITY) Slog.v(TAG, "VIS " + this + ": interesting="
                 + numInteresting + " visible=" + numVisible);
         if (nowDrawn != reportedDrawn) {
-            onWindowsDrawn(nowDrawn, SystemClock.uptimeMillis());
+            onWindowsDrawn(nowDrawn, SystemClock.elapsedRealtimeNanos());
             reportedDrawn = nowDrawn;
         }
         if (nowVisible != reportedVisible) {
diff --git a/services/core/java/com/android/server/wm/LaunchObserverRegistryImpl.java b/services/core/java/com/android/server/wm/LaunchObserverRegistryImpl.java
index e34626d7177f..362ed3c380c5 100644
--- a/services/core/java/com/android/server/wm/LaunchObserverRegistryImpl.java
+++ b/services/core/java/com/android/server/wm/LaunchObserverRegistryImpl.java
@@ -70,9 +70,12 @@ class LaunchObserverRegistryImpl implements
     }
 
     @Override
-    public void onIntentStarted(Intent intent) {
+    public void onIntentStarted(Intent intent, long timestampNs) {
         mHandler.sendMessage(PooledLambda.obtainMessage(
-                LaunchObserverRegistryImpl::handleOnIntentStarted, this, intent));
+                LaunchObserverRegistryImpl::handleOnIntentStarted,
+                this,
+                intent,
+                timestampNs));
     }
 
     @Override
@@ -99,18 +102,22 @@ class LaunchObserverRegistryImpl implements
 
     @Override
     public void onActivityLaunchFinished(
-        @ActivityRecordProto byte[] activity) {
+        @ActivityRecordProto byte[] activity,
+        long timestampNs) {
         mHandler.sendMessage(PooledLambda.obtainMessage(
-                LaunchObserverRegistryImpl::handleOnActivityLaunchFinished, this, activity));
+            LaunchObserverRegistryImpl::handleOnActivityLaunchFinished,
+            this,
+            activity,
+            timestampNs));
     }
 
     @Override
-    public void onReportFullyDrawn(@ActivityRecordProto byte[] activity, long timestampNanos) {
+    public void onReportFullyDrawn(@ActivityRecordProto byte[] activity, long timestampNs) {
         mHandler.sendMessage(PooledLambda.obtainMessage(
             LaunchObserverRegistryImpl::handleOnReportFullyDrawn,
             this,
             activity,
-            timestampNanos));
+            timestampNs));
     }
 
     // Use PooledLambda.obtainMessage to invoke below methods. Every method reference must be
@@ -125,11 +132,11 @@ class LaunchObserverRegistryImpl implements
         mList.remove(observer);
     }
 
-    private void handleOnIntentStarted(Intent intent) {
+    private void handleOnIntentStarted(Intent intent, long timestampNs) {
         // Traverse start-to-end to meet the registerLaunchObserver multi-cast order guarantee.
         for (int i = 0; i < mList.size(); i++) {
              ActivityMetricsLaunchObserver o = mList.get(i);
-             o.onIntentStarted(intent);
+             o.onIntentStarted(intent, timestampNs);
         }
     }
 
@@ -161,20 +168,20 @@ class LaunchObserverRegistryImpl implements
     }
 
     private void handleOnActivityLaunchFinished(
-            @ActivityRecordProto byte[] activity) {
+            @ActivityRecordProto byte[] activity, long timestampNs) {
         // Traverse start-to-end to meet the registerLaunchObserver multi-cast order guarantee.
         for (int i = 0; i < mList.size(); i++) {
             ActivityMetricsLaunchObserver o = mList.get(i);
-            o.onActivityLaunchFinished(activity);
+            o.onActivityLaunchFinished(activity, timestampNs);
         }
     }
 
     private void handleOnReportFullyDrawn(
-            @ActivityRecordProto byte[] activity, long timestampNanos) {
+            @ActivityRecordProto byte[] activity, long timestampNs) {
         // Traverse start-to-end to meet the registerLaunchObserver multi-cast order guarantee.
         for (int i = 0; i < mList.size(); i++) {
             ActivityMetricsLaunchObserver o = mList.get(i);
-            o.onReportFullyDrawn(activity, timestampNanos);
+            o.onReportFullyDrawn(activity, timestampNs);
         }
     }
 }
diff --git a/services/core/java/com/android/server/wm/RecentsAnimationController.java b/services/core/java/com/android/server/wm/RecentsAnimationController.java
index bd27905e1a0f..0b2dde71ab6e 100644
--- a/services/core/java/com/android/server/wm/RecentsAnimationController.java
+++ b/services/core/java/com/android/server/wm/RecentsAnimationController.java
@@ -494,7 +494,8 @@ public class RecentsAnimationController implements DeathRecipient {
         }
         final SparseIntArray reasons = new SparseIntArray();
         reasons.put(WINDOWING_MODE_FULLSCREEN, APP_TRANSITION_RECENTS_ANIM);
-        mService.mAtmInternal.notifyAppTransitionStarting(reasons, SystemClock.uptimeMillis());
+        mService.mAtmInternal
+            .notifyAppTransitionStarting(reasons, SystemClock.elapsedRealtimeNanos());
     }
 
     private RemoteAnimationTarget[] createAppAnimations() {
diff --git a/services/tests/wmtests/src/com/android/server/wm/ActivityMetricsLaunchObserverTests.java b/services/tests/wmtests/src/com/android/server/wm/ActivityMetricsLaunchObserverTests.java
index 64996dbfce5b..2836e69f79da 100644
--- a/services/tests/wmtests/src/com/android/server/wm/ActivityMetricsLaunchObserverTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/ActivityMetricsLaunchObserverTests.java
@@ -129,7 +129,7 @@ public class ActivityMetricsLaunchObserverTests extends ActivityTestsBase {
 
         mActivityMetricsLogger.notifyActivityLaunching(intent);
 
-        verifyAsync(mLaunchObserver).onIntentStarted(eq(intent));
+        verifyAsync(mLaunchObserver).onIntentStarted(eq(intent), anyLong());
         verifyNoMoreInteractions(mLaunchObserver);
     }
 
@@ -164,12 +164,12 @@ public class ActivityMetricsLaunchObserverTests extends ActivityTestsBase {
        testOnActivityLaunched();
 
        mActivityMetricsLogger.notifyTransitionStarting(new SparseIntArray(),
-               SystemClock.uptimeMillis());
+               SystemClock.elapsedRealtimeNanos());
 
        mActivityMetricsLogger.notifyWindowsDrawn(mActivityRecord.getWindowingMode(),
-               SystemClock.uptimeMillis());
+               SystemClock.elapsedRealtimeNanos());
 
-       verifyAsync(mLaunchObserver).onActivityLaunchFinished(eqProto(mActivityRecord));
+       verifyAsync(mLaunchObserver).onActivityLaunchFinished(eqProto(mActivityRecord), anyLong());
        verifyNoMoreInteractions(mLaunchObserver);
     }
 
@@ -217,12 +217,13 @@ public class ActivityMetricsLaunchObserverTests extends ActivityTestsBase {
        testOnActivityLaunchedTrampoline();
 
        mActivityMetricsLogger.notifyTransitionStarting(new SparseIntArray(),
-               SystemClock.uptimeMillis());
+               SystemClock.elapsedRealtimeNanos());
 
        mActivityMetricsLogger.notifyWindowsDrawn(mActivityRecordTrampoline.getWindowingMode(),
-               SystemClock.uptimeMillis());
+               SystemClock.elapsedRealtimeNanos());
 
-       verifyAsync(mLaunchObserver).onActivityLaunchFinished(eqProto(mActivityRecordTrampoline));
+       verifyAsync(mLaunchObserver).onActivityLaunchFinished(eqProto(mActivityRecordTrampoline),
+                                                             anyLong());
        verifyNoMoreInteractions(mLaunchObserver);
     }