Program Listing for File CudaMemPrefetchOperation.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/CudaMemPrefetchOperation.hpp"
#include <cuda_runtime_api.h>
#include "umpire/util/Macros.hpp"
namespace umpire {
namespace op {
void
CudaMemPrefetchOperation::apply(
void* src_ptr,
util::AllocationRecord* UMPIRE_UNUSED_ARG(allocation),
int value,
std::size_t length)
{
int device{value};
cudaError_t error;
// Use current device for properties if device is CPU
int current_device;
cudaGetDevice(¤t_device);
int gpu = (device != cudaCpuDeviceId) ? device : current_device;
cudaDeviceProp properties;
error = ::cudaGetDeviceProperties(&properties, gpu);
if (error != cudaSuccess) {
UMPIRE_ERROR("cudaGetDeviceProperties( device = " << device << "),"
<< " failed with error: "
<< cudaGetErrorString(error));
}
if (properties.managedMemory == 1
&& properties.concurrentManagedAccess == 1) {
error = ::cudaMemPrefetchAsync(
src_ptr,
length,
device);
if (error != cudaSuccess) {
UMPIRE_ERROR("cudaMemPrefetchAsync( src_ptr = " << src_ptr
<< ", length = " << length
<< ", device = " << device
<< ") failed with error: "
<< cudaGetErrorString(error));
}
}
}
} // end of namespace op
} // end of namespace umpire