Ben Sander a55ce5bee4 Add initial HIP_SYNC_NULL_STREAM=0 mode. ...

This eliminates host-synchronization for null stream.  Instead, the
null-stream uses GPU-side events to wait for other streams.
Default is OFF pending additional testing.

Add enhanced null-stream test.

Also refine HIP_TRACE_API.


[ROCm/hip commit: 27877f8854]

2017-05-16 19:04:25 -05:00

projects/hip

Add initial HIP_SYNC_NULL_STREAM=0 mode.

2017-05-16 19:04:25 -05:00

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