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/libs/gui/BufferQueueConsumer.cpp b/libs/gui/BufferQueueConsumer.cpp
index cbc8893..e8860d1 100644
--- a/libs/gui/BufferQueueConsumer.cpp
+++ b/libs/gui/BufferQueueConsumer.cpp
@@ -260,6 +260,7 @@
mCore->mDequeueCondition.broadcast();
ATRACE_INT(mCore->mConsumerName.string(), mCore->mQueue.size());
+ mCore->mOccupancyTracker.registerOccupancyChange(mCore->mQueue.size());
VALIDATE_CONSISTENCY();
}
@@ -717,6 +718,13 @@
return mCore->mSidebandStream;
}
+status_t BufferQueueConsumer::getOccupancyHistory(bool forceFlush,
+ std::vector<OccupancyTracker::Segment>* outHistory) {
+ Mutex::Autolock lock(mCore->mMutex);
+ *outHistory = mCore->mOccupancyTracker.getSegmentHistory(forceFlush);
+ return NO_ERROR;
+}
+
void BufferQueueConsumer::dump(String8& result, const char* prefix) const {
const IPCThreadState* ipc = IPCThreadState::self();
const pid_t pid = ipc->getCallingPid();