BufferQueue/SF: Add OccupancyTracker
Adds an OccupancyTracker to BufferQueue. This module keeps track of
how many buffers are in the queue over time, which, in combination
with various aggregation of these statistics, allows SurfaceFlinger
to report what fraction of the time a given layer was double- or
triple-buffered.
Change-Id: Ida6e967dc5483c00a633e9fe03998e420dd88502
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index ed320cb..59a604a 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -1680,7 +1680,8 @@
return mQueuedFrames > 0 || mSidebandStreamChanged || mAutoRefresh;
}
-void Layer::onPostComposition() {
+bool Layer::onPostComposition() {
+ bool frameLatencyNeeded = mFrameLatencyNeeded;
if (mFrameLatencyNeeded) {
nsecs_t desiredPresentTime = mSurfaceFlingerConsumer->getTimestamp();
mFrameTracker.setDesiredPresentTime(desiredPresentTime);
@@ -1712,6 +1713,7 @@
mFrameTracker.advanceFrame();
mFrameLatencyNeeded = false;
}
+ return frameLatencyNeeded;
}
#ifdef USE_HWC2
@@ -2185,6 +2187,20 @@
*outAcquireFence = mSurfaceFlingerConsumer->getCurrentFence();
*outPrevReleaseFence = mSurfaceFlingerConsumer->getPrevReleaseFence();
}
+
+std::vector<OccupancyTracker::Segment> Layer::getOccupancyHistory(
+ bool forceFlush) {
+ std::vector<OccupancyTracker::Segment> history;
+ status_t result = mSurfaceFlingerConsumer->getOccupancyHistory(forceFlush,
+ &history);
+ if (result != NO_ERROR) {
+ ALOGW("[%s] Failed to obtain occupancy history (%d)", mName.string(),
+ result);
+ return {};
+ }
+ return history;
+}
+
// ---------------------------------------------------------------------------
Layer::LayerCleaner::LayerCleaner(const sp<SurfaceFlinger>& flinger,