diff --git a/services/surfaceflinger/Tracing/LayerTracing.cpp b/services/surfaceflinger/Tracing/LayerTracing.cpp
index d136e0b..006efdf 100644
--- a/services/surfaceflinger/Tracing/LayerTracing.cpp
+++ b/services/surfaceflinger/Tracing/LayerTracing.cpp
@@ -98,16 +98,20 @@
     mBuffer->dump(result);
 }
 
-void LayerTracing::notify(const char* where) {
-    ATRACE_CALL();
+void LayerTracing::notify(bool visibleRegionDirty, int64_t time) {
     std::scoped_lock lock(mTraceLock);
     if (!mEnabled) {
         return;
     }
 
+    if (!visibleRegionDirty && !flagIsSet(LayerTracing::TRACE_BUFFERS)) {
+        return;
+    }
+
     ATRACE_CALL();
     LayersTraceProto entry;
-    entry.set_elapsed_realtime_nanos(elapsedRealtimeNano());
+    entry.set_elapsed_realtime_nanos(time);
+    const char* where = visibleRegionDirty ? "visibleRegionsDirty" : "bufferLatched";
     entry.set_where(where);
     LayersProto layers(mFlinger.dumpDrawingStateProto(mFlags));
 
diff --git a/services/surfaceflinger/Tracing/LayerTracing.h b/services/surfaceflinger/Tracing/LayerTracing.h
index 8ca3587..bd448c9 100644
--- a/services/surfaceflinger/Tracing/LayerTracing.h
+++ b/services/surfaceflinger/Tracing/LayerTracing.h
@@ -47,7 +47,7 @@
     bool isEnabled() const;
     status_t writeToFile();
     LayersTraceFileProto createTraceFileProto() const;
-    void notify(const char* where);
+    void notify(bool visibleRegionDirty, int64_t time);
 
     enum : uint32_t {
         TRACE_INPUT = 1 << 1,