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

1 files changed, 3 insertions, 0 deletions

diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index dfda25d013ed..8ec04304a808 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -654,6 +654,9 @@ void CanvasContext::draw(bool solelyTextureViewUpdates) {
         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,