SurfaceFlinger: use intended wake up time when calculating next present time
If SurfaceFlinger wakes up too late (due to the main thread being busy)
it may calculate a wrong presentation time as it is based on the wake up time.
Instead, cache the intended wake up time and use it as the base time.
Change-Id: I84c37bd5f164fbdef3151c0898d3cea624cea515
Bug: 154199567
Test: collect systrace for launcher scrolling
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index 04cc96a..d36b16a 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -114,7 +114,7 @@
bool* periodFlushed);
void addPresentFence(const std::shared_ptr<FenceTime>&);
void setIgnorePresentFences(bool ignore);
- nsecs_t getDispSyncExpectedPresentTime();
+ nsecs_t getDispSyncExpectedPresentTime(nsecs_t now);
// Layers are registered on creation, and unregistered when the weak reference expires.
void registerLayer(Layer*);