SF: do not latch unsignaled in early offsets
When we are in early offsets we are most likely in client composition
and/or WM animating windows. Avoid latching unsignaled buffers in this
case to avoid jank when an unsignaled buffers block newer transactions
from getting applied in the next frame.
Bug: 205153280
Test: modified TouchLatency app with long draws
Change-Id: Ice5456db1dec1feaf11f6e022a1eaaedfb26781f
diff --git a/services/surfaceflinger/Scheduler/VsyncModulator.h b/services/surfaceflinger/Scheduler/VsyncModulator.h
index 2000c54..537cae1 100644
--- a/services/surfaceflinger/Scheduler/VsyncModulator.h
+++ b/services/surfaceflinger/Scheduler/VsyncModulator.h
@@ -109,11 +109,16 @@
[[nodiscard]] VsyncConfigOpt onDisplayRefresh(bool usedGpuComposition);
+ [[nodiscard]] bool isVsyncConfigDefault() const;
+
protected:
// Called from unit tests as well
void binderDied(const wp<IBinder>&) override EXCLUDES(mMutex);
private:
+ enum class VsyncConfigType { Early, EarlyGpu, Late };
+
+ VsyncConfigType getNextVsyncConfigType() const REQUIRES(mMutex);
const VsyncConfig& getNextVsyncConfig() const REQUIRES(mMutex);
[[nodiscard]] VsyncConfig updateVsyncConfig() EXCLUDES(mMutex);
[[nodiscard]] VsyncConfig updateVsyncConfigLocked() REQUIRES(mMutex);