commit 06d9139e8c056ff29ce3fd1d0952ec1133aae4ad
author Jimmy Shiu <jimmyshiu@google.com> Tue Mar 15 19:35:45 2022 +0800
committer Jimmy Shiu <jimmyshiu@google.com> Tue Mar 15 19:56:10 2022 +0800
tree ef106c4aef886e44df61c9c08899c46e17c3a1c3
parent 4ab407e5fe315ff4deddc96396d3d5c1f7d6877f

Add postAndWait() trace for calculating frame drawing time

postAndWait() shows the duration that UI Thread waits for RenderThread.
The trace is helpful for perfetto parser to calculate the actual frame
drawing time from CPU resource perspective.

Bug: 224653682
Test: capture trace and check App UI Thread.
Change-Id: Ic3a11b60abb1fea8cc7b44ce6889ab1e3c2788fd

libs/hwui/renderthread/DrawFrameTask.cpp

diff --git a/libs/hwui/renderthread/DrawFrameTask.cpp b/libs/hwui/renderthread/DrawFrameTask.cpp
index 8c98c72..2357dfe 100644
--- a/libs/hwui/renderthread/DrawFrameTask.cpp
+++ b/libs/hwui/renderthread/DrawFrameTask.cpp
@@ -133,6 +133,7 @@
 }
 
 void DrawFrameTask::postAndWait() {
+    ATRACE_CALL();
     AutoMutex _lock(mLock);
     mRenderThread->queue().post([this]() { run(); });
     mSignal.wait(mLock);