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Made comm streams high prio

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This commit is contained in:
jpekkila
2020-04-22 17:03:53 +03:00
parent 22e01b7f1d
commit c93b3265e6
1 changed files with 6 additions and 3 deletions
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9
src/core/device.cc
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@@ -576,6 +576,7 @@ acCreatePackedData(const int3 dims)
#if AC_MPI_RT_PINNING
ERRCHK_CUDA_ALWAYS(cudaMallocHost((void**)&data.data_pinned, bytes));
//ERRCHK_CUDA_ALWAYS(cudaMallocManaged((void**)&data.data_pinned, bytes)); // Significantly slower than pinned (38 ms vs. 125 ms)
#endif // AC_MPI_RT_PINNING
#if AC_MPI_UNIDIRECTIONAL_COMM
@@ -674,7 +675,7 @@ acPinPackedData(const Device device, const cudaStream_t stream, PackedData* ddat
const size_t bytes = ddata->dims.x * ddata->dims.y * ddata->dims.z * sizeof(ddata->data[0]) *
NUM_VTXBUF_HANDLES;
ERRCHK_CUDA(
cudaMemcpyAsync(ddata->data_pinned, ddata->data, bytes, cudaMemcpyDeviceToHost, stream));
cudaMemcpyAsync(ddata->data_pinned, ddata->data, bytes, cudaMemcpyDefault, stream));
}
static void
@@ -690,7 +691,7 @@ acUnpinPackedData(const Device device, const cudaStream_t stream, PackedData* dd
const size_t bytes = ddata->dims.x * ddata->dims.y * ddata->dims.z * sizeof(ddata->data[0]) *
NUM_VTXBUF_HANDLES;
ERRCHK_CUDA(
cudaMemcpyAsync(ddata->data, ddata->data_pinned, bytes, cudaMemcpyHostToDevice, stream));
cudaMemcpyAsync(ddata->data, ddata->data_pinned, bytes, cudaMemcpyDefault, stream));
}
#endif // AC_MPI_RT_PINNING
@@ -906,7 +907,9 @@ acCreateCommData(const Device device, const int3 dims, const size_t count)
data.dsts_host[i] = acCreatePackedDataHost(dims);
#endif
cudaStreamCreate(&data.streams[i]);
int low_prio, high_prio;
cudaDeviceGetStreamPriorityRange(&low_prio, &high_prio);
cudaStreamCreateWithPriority(&data.streams[i], cudaStreamNonBlocking, high_prio);
}
return data;