diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 3057ed1..cb6dd8b 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1808,6 +1808,7 @@
     preComposition();
     rebuildLayerStacks();
     calculateWorkingSet();
+    long compositionTime = elapsedRealtimeNano();
     for (const auto& [token, display] : mDisplays) {
         beginFrame(display);
         prepareFrame(display);
@@ -1837,7 +1838,7 @@
     if (mVisibleRegionsDirty) {
         mVisibleRegionsDirty = false;
         if (mTracingEnabled) {
-            mTracing.notify("visibleRegionsDirty");
+            mTracing.notify(compositionTime, "visibleRegionsDirty");
         }
     }
 }
diff --git a/services/surfaceflinger/SurfaceTracing.cpp b/services/surfaceflinger/SurfaceTracing.cpp
index 9053f2c..5d9be0b 100644
--- a/services/surfaceflinger/SurfaceTracing.cpp
+++ b/services/surfaceflinger/SurfaceTracing.cpp
@@ -68,8 +68,9 @@
     return mEnabled;
 }
 
-void SurfaceTracing::notify(const char* where) {
+void SurfaceTracing::notify(long compositionTime, const char* where) {
     std::scoped_lock lock(mSfLock);
+    mCompositionTime = compositionTime;
     mWhere = where;
     mCanStartTrace.notify_one();
 }
@@ -160,7 +161,7 @@
     ATRACE_CALL();
 
     LayersTraceProto entry;
-    entry.set_elapsed_realtime_nanos(elapsedRealtimeNano());
+    entry.set_elapsed_realtime_nanos(mCompositionTime);
     entry.set_where(where);
     LayersProto layers(mFlinger.dumpDrawingStateProto(mTraceFlags));
     entry.mutable_layers()->Swap(&layers);
diff --git a/services/surfaceflinger/SurfaceTracing.h b/services/surfaceflinger/SurfaceTracing.h
index 4773307..395d562 100644
--- a/services/surfaceflinger/SurfaceTracing.h
+++ b/services/surfaceflinger/SurfaceTracing.h
@@ -46,7 +46,7 @@
     bool disable();
     status_t writeToFile();
     bool isEnabled() const;
-    void notify(const char* where);
+    void notify(long compositionTime, const char* where);
 
     void setBufferSize(size_t bufferSizeInByte);
     void writeToFileAsync();
@@ -81,6 +81,8 @@
         std::queue<LayersTraceProto> mStorage;
     };
 
+    long mCompositionTime;
+
     void mainLoop();
     void addFirstEntry();
     LayersTraceProto traceWhenNotified();