From 3118f969f488b738de1976917a0944705c209173 Mon Sep 17 00:00:00 2001
From: Alec Mouri <alecmouri@google.com>
Date: Fri, 13 Sep 2024 22:34:11 +0000
Subject: Add some tracing for release fences

* Fix FenceMonitor to cleanly teardown
* App-side tracing for BBQ release callbacks
* Trace future compleition in TxnCallbackInvoker

Bug: 360932099
Bug: 357762453
Flag: EXEMPT debugging
Test: builds
Test: perfetto
Change-Id: I188c04da1e249b672b428837c328568d9e7a1e66
---
 libs/gui/BLASTBufferQueue.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'libs/gui/BLASTBufferQueue.cpp')

diff --git a/libs/gui/BLASTBufferQueue.cpp b/libs/gui/BLASTBufferQueue.cpp
index 3c1971fd81..94998e5ab7 100644
--- a/libs/gui/BLASTBufferQueue.cpp
+++ b/libs/gui/BLASTBufferQueue.cpp
@@ -31,6 +31,7 @@
 #include <sys/epoll.h>
 #include <sys/eventfd.h>
 
+#include <gui/FenceMonitor.h>
 #include <gui/FrameRateUtils.h>
 #include <gui/GLConsumer.h>
 #include <gui/IProducerListener.h>
@@ -475,6 +476,16 @@ void BLASTBufferQueue::releaseBufferCallbackLocked(
     ATRACE_CALL();
     BQA_LOGV("releaseBufferCallback %s", id.to_string().c_str());
 
+    if (CC_UNLIKELY(atrace_is_tag_enabled(ATRACE_TAG_GRAPHICS))) {
+        if (!mFenceMonitor) {
+            std::string monitorName = "release :";
+            monitorName.append(mName.c_str());
+            mFenceMonitor.emplace(monitorName.c_str());
+        }
+
+        mFenceMonitor->queueFence(releaseFence);
+    }
+
     // Calculate how many buffers we need to hold before we release them back
     // to the buffer queue. This will prevent higher latency when we are running
     // on a lower refresh rate than the max supported. We only do that for EGL
-- 
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