008133cf41
Add a threshold for ROCR/SDMA P2P transfers. ROCR copy path requires extra barriers in compute for synchronization. That costs extra performance with tiny transfers. Reduce active wait time to 10us. Tensorflow uses extra thread per GPU with constant hipEventQuery() calls. Longer active waits in ROCr affect CPU performance. Change-Id: I9020358438615fa2d4617f862f00a562f0a588e7