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Use ArrayFire Stream for Thrust operations #3029

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Merged
umar456 merged 1 commit into from
Nov 2, 2020
Merged

Use ArrayFire Stream for Thrust operations #3029

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48 changes: 26 additions & 22 deletions src/backend/cuda/ThrustArrayFirePolicy.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -12,31 +12,11 @@
#include <backend.hpp>
#include <memory.hpp>
#include <platform.hpp>
#include <thrust/execution_policy.h>
#include <thrust/system/cuda/execution_policy.h>

namespace cuda {
struct ThrustArrayFirePolicy
: thrust::device_execution_policy<ThrustArrayFirePolicy> {};

namespace {
__DH__
inline cudaStream_t get_stream(ThrustArrayFirePolicy) {
#if defined(__CUDA_ARCH__)
return 0;
#else
return getActiveStream();
#endif
}

__DH__
inline cudaError_t synchronize_stream(ThrustArrayFirePolicy) {
#if defined(__CUDA_ARCH__)
return cudaDeviceSynchronize();
#else
return cudaStreamSynchronize(getActiveStream());
#endif
}
} // namespace
: thrust::cuda::execution_policy<ThrustArrayFirePolicy> {};

template<typename T>
thrust::pair<thrust::pointer<T, ThrustArrayFirePolicy>, std::ptrdiff_t>
Expand All @@ -53,3 +33,27 @@ inline void return_temporary_buffer(ThrustArrayFirePolicy, Pointer p) {
}

} // namespace cuda

namespace thrust {
namespace cuda_cub {
template<>
__DH__ inline cudaStream_t get_stream<::cuda::ThrustArrayFirePolicy>(
execution_policy<::cuda::ThrustArrayFirePolicy> &) {
#if defined(__CUDA_ARCH__)
return 0;
#else
return ::cuda::getActiveStream();
#endif
}

__DH__
inline cudaError_t synchronize_stream(const ::cuda::ThrustArrayFirePolicy &) {
#if defined(__CUDA_ARCH__)
return cudaDeviceSynchronize();
#else
return cudaStreamSynchronize(::cuda::getActiveStream());
#endif
}

} // namespace cuda_cub
} // namespace thrust