tree 54aa16458f1c80e0677bc2ce74a96cb2d16915c5
parent b3dd790d78517ed973b5487b4bf07167ca2def24
author Mike Stroyan <stroyan@google.com> 1468426225 -0600
committer Mike Stroyan <stroyan@google.com> 1468445308 -0600

layers: faster threading layer for single thread

Add a check to the threading layer to detect a single thread case.
If the application has only called vulkan from one thread at a time,
then skip access counters for externally synchronized parameters.
This greatly reduces the overhead of the layer for applications
that don't truly use vulkan in a multi-threaded way.