scratch_used_large_ was uninitialized leading to the observed hang.
DynamicScratchHandler would wait for a large scratch release despite no
large scratch having yet been allocated. Fixes .
The patch also removes a potential race between AddScratchNotifier and
ReleaseQueueScratch. The race condition does not exist today since both
scratch alloc and release run on the same thread. The changes will
prevent this potential race from manifesting if the async event handler
is ever updated to use multiple threads.
Also enhances scratch occupancy reduction reporting. Reporting now
prints the initial request size as well as the allocated size and the
effect on occupancy this has. Occupancy is computed in terms of the
requesting dispatch grid size so may be >100%.
Change-Id: I0fc5ee01467ff4c29bdd25d545177c97862c3bd9
Sean Keely
6c556002d8