commit 8de697ed6117ba26d46196df4df5c9ce0295a2a9
author Alec Mouri <alecmouri@google.com> Thu Mar 19 10:52:01 2020 -0700
committer Wei Wang <wvw@google.com> Wed Apr 01 04:43:51 2020 +0000
tree 95dfd3d29e220093504b608fb99c7b7452e67b87
parent 8929001832590afd537f2e06147c039b951d862c

[SurfaceFlinger] Add refresh rate counts to TimeStats

This count will be exposed to lab tests as a breakdown metric for
uncovering jank.

Bug: 144526027
Test: dumpsys SurfaceFlinger --timestats -dump
Test: libsurfaceflinger_unittest
Change-Id: I921e147e96212ad6a08fa14d6e3d7a98893a8602

services/surfaceflinger/TimeStats/TimeStats.cpp

diff --git a/services/surfaceflinger/TimeStats/TimeStats.cpp b/services/surfaceflinger/TimeStats/TimeStats.cpp
index 8038eba..96fd03a 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.cpp
+++ b/services/surfaceflinger/TimeStats/TimeStats.cpp
@@ -282,6 +282,15 @@
     mTimeStats.clientCompositionReusedFrames++;
 }
 
+void TimeStats::incrementRefreshRateSwitches() {
+    if (!mEnabled.load()) return;
+
+    ATRACE_CALL();
+
+    std::lock_guard<std::mutex> lock(mMutex);
+    mTimeStats.refreshRateSwitches++;
+}
+
 void TimeStats::recordDisplayEventConnectionCount(int32_t count) {
     if (!mEnabled.load()) return;
 
@@ -835,6 +844,7 @@
     mTimeStats.missedFrames = 0;
     mTimeStats.clientCompositionFrames = 0;
     mTimeStats.clientCompositionReusedFrames = 0;
+    mTimeStats.refreshRateSwitches = 0;
     mTimeStats.displayEventConnectionsCount = 0;
     mTimeStats.displayOnTime = 0;
     mTimeStats.presentToPresent.hist.clear();