commit 0df722f5580a9b9fd1ccc063875b100a45b66c56
author Kyle Holm <kholm@google.com> Fri Sep 06 15:05:15 2024 -0700
committer Kyle Holm <kholm@google.com> Fri Sep 06 22:19:09 2024 +0000
tree a73560a7f533c42b6e16f6e72731b834a53f8b6f
parent 6a7b8d724329291f3c362e4a88f3e262ef7cfb87

Add a trace to link inputEventId and vsyncId

We should have an easy way to query in a perfetto trace
for the frame associated with an input event.
This change adds a trace event to do that.

Bug: 363076084
Test:
https://ui.perfetto.dev/#!/?s=039fa15daa0e4cd005587a64962b5a48f7910cec
Verified the new slice has the correct vsyncId and inputEventId.
Flag: EXEMPT log only update

Change-Id: I2d4e5e439076c94b195cbe328b66d0c988e10661

libs/hwui/renderthread/CanvasContext.cpp

diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index dfda25d..8ec0430 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -654,6 +654,9 @@
         if (vsyncId != UiFrameInfoBuilder::INVALID_VSYNC_ID) {
             const auto inputEventId =
                     static_cast<int32_t>(mCurrentFrameInfo->get(FrameInfoIndex::InputEventId));
+            ATRACE_FORMAT(
+                "frameTimelineInfo(frameNumber=%llu, vsyncId=%lld, inputEventId=0x%" PRIx32 ")",
+                frameCompleteNr, vsyncId, inputEventId);
             const ANativeWindowFrameTimelineInfo ftl = {
                     .frameNumber = frameCompleteNr,
                     .frameTimelineVsyncId = vsyncId,