Add GPU draw stats to gfxinfo and GraphicsStatsService

Test: ran dumpsys with gfxinfo and graphicsstats
Change-Id: Id9950de87dc4343c6878baa6a6dd42fbc8aeddef

1 files changed, 9 insertions, 0 deletions

diff --git a/libs/hwui/FrameInfo.h b/libs/hwui/FrameInfo.h
index b75192ff8476..51674fbd557e 100644
--- a/libs/hwui/FrameInfo.h
+++ b/libs/hwui/FrameInfo.h
@@ -51,6 +51,8 @@ enum class FrameInfoIndex {
     DequeueBufferDuration,
     QueueBufferDuration,
 
+    GpuCompleted,
+
     // Must be the last value!
     // Also must be kept in sync with FrameMetrics.java#FRAME_STATS_COUNT
     NumIndexes
@@ -143,6 +145,13 @@ public:
         return duration(FrameInfoIndex::IntendedVsync, FrameInfoIndex::FrameCompleted);
     }
 
+    inline int64_t gpuDrawTime() const {
+        // GPU start time is approximated to the moment before swapBuffer is invoked.
+        // We could add an EGLSyncKHR fence at the beginning of the frame, but that is an overhead.
+        int64_t endTime = get(FrameInfoIndex::GpuCompleted);
+        return endTime > 0 ? endTime - get(FrameInfoIndex::SwapBuffers) : -1;
+    }
+
     inline int64_t& set(FrameInfoIndex index) { return mFrameInfo[static_cast<int>(index)]; }
 
     inline int64_t get(FrameInfoIndex index) const {