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/Layer.h b/services/surfaceflinger/Layer.h
index 9686259..b3fa5e7 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -34,6 +34,7 @@
#include "LayerBase.h"
#include "SurfaceTextureLayer.h"
#include "Transform.h"
+#include <utils/Timers.h>
namespace android {
@@ -86,6 +87,7 @@
protected:
virtual void onFirstRef();
virtual void dump(String8& result, char* scratch, size_t size) const;
+ virtual void dumpStats(String8& result, char* buffer, size_t SIZE) const;
private:
friend class SurfaceTextureLayer;
@@ -114,7 +116,14 @@
bool mCurrentOpacity;
bool mFrameLatencyNeeded;
int mFrameLatencyOffset;
- int64_t mFrameLatencies[128];
+ struct Statistics {
+ Statistics() : timestamp(0), set(0), vsync(0) { }
+ nsecs_t timestamp; // buffer timestamp
+ nsecs_t set; // buffer displayed timestamp
+ nsecs_t vsync; // vsync immediately before set
+ };
+ // protected by mLock
+ Statistics mFrameStats[128];
// constants
PixelFormat mFormat;
@@ -126,9 +135,6 @@
bool mSecure; // no screenshots
bool mProtectedByApp; // application requires protected path to external sink
Region mPostedDirtyRegion;
-
- // binder thread, transaction thread
- mutable Mutex mLock;
};
// ---------------------------------------------------------------------------