commit e77c7669bee30b7c0099172cf0c38cef92412040
author Dan Stoza <stoza@google.com> Fri May 13 11:37:28 2016 -0700
committer Dan Stoza <stoza@google.com> Fri May 13 15:48:03 2016 -0700
tree bdf6da9c3a2e32628f5fe837f519ff27dcb4bf1e
parent 411326105161b86965784dad03452900b2fcb911

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

libs/gui/BufferQueueProducer.cpp

diff --git a/libs/gui/BufferQueueProducer.cpp b/libs/gui/BufferQueueProducer.cpp
index 3e26e05..65f8255 100644
--- a/libs/gui/BufferQueueProducer.cpp
+++ b/libs/gui/BufferQueueProducer.cpp
@@ -886,6 +886,7 @@
                 static_cast<uint32_t>(mCore->mQueue.size()));
 
         ATRACE_INT(mCore->mConsumerName.string(), mCore->mQueue.size());
+        mCore->mOccupancyTracker.registerOccupancyChange(mCore->mQueue.size());
 
         // Take a ticket for the callback functions
         callbackTicket = mNextCallbackTicket++;