SurfaceFlinger: Add --static-screen stats
Adds a --static-screen option to dumpsys SurfaceFlinger, which
displays screen-on time broken down by the time between the prior
frame and the current frame. An example dump looks like this:
$ adb shell dumpsys SurfaceFlinger --static-screen
Static screen stats:
< 1 frames: 12.235 s (3.5%)
< 2 frames: 29.898 s (8.7%)
< 3 frames: 15.370 s (4.4%)
< 4 frames: 13.103 s (3.8%)
< 5 frames: 15.780 s (4.6%)
< 6 frames: 2.022 s (0.6%)
< 7 frames: 0.201 s (0.1%)
7+ frames: 256.887 s (74.4%)
The buckets are exclusive, so '< 3 frames' covers the interval
[2, 3) frames
Bug: 19543586
Change-Id: I3253a54c23995d25e96016997acedd0775956b60
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 4deb815..34f0aaa 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -416,6 +416,8 @@
void logFrameStats();
+ void dumpStaticScreenStats(String8& result) const;
+
/* ------------------------------------------------------------------------
* Attributes
*/
@@ -493,6 +495,13 @@
mat4 mColorMatrix;
bool mHasColorMatrix;
+
+ // Static screen stats
+ bool mHasPoweredOff;
+ static const size_t NUM_BUCKETS = 8; // < 1-7, 7+
+ nsecs_t mFrameBuckets[NUM_BUCKETS];
+ nsecs_t mTotalTime;
+ nsecs_t mLastSwapTime;
};
}; // namespace android