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Add initial HIP_SYNC_NULL_STREAM=0 mode.

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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]
This commit is contained in:
Ben Sander
2017-05-12 17:04:23 -05:00
parent cfe81dfbf4
commit a55ce5bee4
11 changed files with 320 additions and 96 deletions
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projects/hip/src/hip_stream.cpp
+2 -2
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@@ -150,7 +150,7 @@ hipError_t hipStreamSynchronize(hipStream_t stream)
if (stream == NULL) {
ihipCtx_t *ctx = ihipGetTlsDefaultCtx();
ctx->locked_syncDefaultStream(true/*waitOnSelf*/);
ctx->locked_syncDefaultStream(true/*waitOnSelf*/, true/*syncToHost*/);
} else {
stream->locked_wait();
e = hipSuccess;
@@ -174,7 +174,7 @@ hipError_t hipStreamDestroy(hipStream_t stream)
//--- Drain the stream:
if (stream == NULL) {
ihipCtx_t *ctx = ihipGetTlsDefaultCtx();
ctx->locked_syncDefaultStream(true/*waitOnSelf*/);
ctx->locked_syncDefaultStream(true/*waitOnSelf*/, true /*syncToHost*/);
} else {
stream->locked_wait();
e = hipSuccess;