diff --git a/services/surfaceflinger/BufferLayer.cpp b/services/surfaceflinger/BufferLayer.cpp
index 1b2b180..a08ae8c 100644
--- a/services/surfaceflinger/BufferLayer.cpp
+++ b/services/surfaceflinger/BufferLayer.cpp
@@ -413,6 +413,7 @@
     // If the head buffer's acquire fence hasn't signaled yet, return and
     // try again later
     if (!fenceHasSignaled()) {
+        ATRACE_NAME("!fenceHasSignaled()");
         mFlinger->signalLayerUpdate();
         return false;
     }