improve SurfaceFlinger dumpsys
It is now possible to say:
dumpsys SurfaceFlinger --latency
to print latency information about all windows
dumpsys SurfaceFlinger --latency window-name
to print the latency stats of the specified window
for instance: dumpsys SurfaceFlinger --latency SurfaceView
The data consists of one line containing global stats, followed by
128 lines of tab separated timestamps in nanosecond.
The first line currently contains the refresh period in nanosecond.
Each 128 following line contains 3 timestamps, of respectively
the app draw time, the vsync timestamp just prior the call to set and
the timestamp of the call to set.
Change-Id: Ib6b6da1d7e2e6ba49c282bdbc0b56a7dc203343a
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardware.h b/services/surfaceflinger/DisplayHardware/DisplayHardware.h
index 77da272..02be4dc 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardware.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardware.h
@@ -76,7 +76,9 @@
uint32_t getMaxViewportDims() const;
// waits for the next vsync and returns the timestamp of when it happened
- nsecs_t waitForVSync() const;
+ nsecs_t waitForRefresh() const;
+ nsecs_t getRefreshPeriod() const;
+ nsecs_t getRefreshTimestamp() const;
uint32_t getPageFlipCount() const;
EGLDisplay getEGLDisplay() const { return mDisplay; }
@@ -119,6 +121,7 @@
mutable Mutex mFakeVSyncMutex;
mutable nsecs_t mNextFakeVSync;
nsecs_t mRefreshPeriod;
+ mutable nsecs_t mLastHwVSync;
HWComposer* mHwc;