From 06d9139e8c056ff29ce3fd1d0952ec1133aae4ad Mon Sep 17 00:00:00 2001
From: Jimmy Shiu <jimmyshiu@google.com>
Date: Tue, 15 Mar 2022 19:35:45 +0800
Subject: [PATCH] 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 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libs/hwui/renderthread/DrawFrameTask.cpp b/libs/hwui/renderthread/DrawFrameTask.cpp
index 8c98c723dbb35..2357dfec72a6e 100644
--- a/libs/hwui/renderthread/DrawFrameTask.cpp
+++ b/libs/hwui/renderthread/DrawFrameTask.cpp
@@ -133,6 +133,7 @@ int DrawFrameTask::drawFrame() {
 }
 
 void DrawFrameTask::postAndWait() {
+    ATRACE_CALL();
     AutoMutex _lock(mLock);
     mRenderThread->queue().post([this]() { run(); });
     mSignal.wait(mLock);