Program Listing for File CudaCopyFromOperation.cpp¶
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//////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2016-20, Lawrence Livermore National Security, LLC and Umpire
// project contributors. See the COPYRIGHT file for details.
//
// SPDX-License-Identifier: (MIT)
//////////////////////////////////////////////////////////////////////////////
#include "umpire/op/CudaCopyFromOperation.hpp"
#include <cuda_runtime_api.h>
#include "umpire/strategy/AllocationStrategy.hpp"
#include "umpire/util/Macros.hpp"
namespace umpire {
namespace op {
void CudaCopyFromOperation::transform(
void* src_ptr,
void** dst_ptr,
util::AllocationRecord* src_allocation,
util::AllocationRecord* UMPIRE_UNUSED_ARG(dst_allocation),
std::size_t length)
{
int device = src_allocation->strategy->getTraits().id;
int old_device;
cudaGetDevice(&old_device);
cudaSetDevice(device);
cudaError_t error =
::cudaMemcpy(*dst_ptr, src_ptr, length, cudaMemcpyDeviceToHost);
cudaSetDevice(old_device);
if (error != cudaSuccess) {
UMPIRE_ERROR("cudaMemcpy( dest_ptr = " << *dst_ptr
<< ", src_ptr = " << src_ptr
<< ", length = " << length
<< ", cudaMemcpyDeviceToHost ) failed with error: "
<< cudaGetErrorString(error));
}
UMPIRE_RECORD_STATISTIC(
"CudaCopyFromOperation",
"src_ptr", reinterpret_cast<uintptr_t>(src_ptr),
"dst_ptr", reinterpret_cast<uintptr_t>(dst_ptr),
"size", length,
"event", "copy");
}
camp::resources::Event
CudaCopyFromOperation::transform_async(
void* src_ptr,
void** dst_ptr,
util::AllocationRecord* UMPIRE_UNUSED_ARG(src_allocation),
util::AllocationRecord* UMPIRE_UNUSED_ARG(dst_allocation),
std::size_t length,
camp::resources::Resource& ctx)
{
auto device = ctx.get<camp::resources::Cuda>();
auto stream = device.get_stream();
cudaError_t error =
::cudaMemcpyAsync(*dst_ptr, src_ptr, length, cudaMemcpyDeviceToHost,stream);
if (error != cudaSuccess) {
UMPIRE_ERROR("cudaMemcpy( dest_ptr = " << *dst_ptr
<< ", src_ptr = " << src_ptr
<< ", length = " << length
<< ", cudaMemcpyDeviceToHost ) failed with error: "
<< cudaGetErrorString(error));
}
UMPIRE_RECORD_STATISTIC(
"CudaCopyFromOperation",
"src_ptr", reinterpret_cast<uintptr_t>(src_ptr),
"dst_ptr", reinterpret_cast<uintptr_t>(dst_ptr),
"size", length,
"event", "copy");
return ctx.get_event();
}
} // end of namespace op
} // end of namespace umpire