Program Listing for File CudaAdviseReadMostlyOperation.cpp

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//////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2019, Lawrence Livermore National Security, LLC.
// Produced at the Lawrence Livermore National Laboratory
//
// Created by David Beckingsale, david@llnl.gov
// LLNL-CODE-747640
//
// All rights reserved.
//
// This file is part of Umpire.
//
// For details, see https://github.com/LLNL/Umpire
// Please also see the LICENSE file for MIT license.
//////////////////////////////////////////////////////////////////////////////
#include "umpire/op/CudaAdviseReadMostlyOperation.hpp"

#include <cuda_runtime_api.h>

#include "umpire/util/Macros.hpp"

namespace umpire {
namespace op {

void
CudaAdviseReadMostlyOperation::apply(
    void* src_ptr,
    util::AllocationRecord* UMPIRE_UNUSED_ARG(src_allocation),
    int val,
    size_t length)
{
  int device = val;
  cudaError_t error;

  cudaDeviceProp properties;
  error = ::cudaGetDeviceProperties(&properties, 0);

  if (error != cudaSuccess) {
    UMPIRE_ERROR("cudaGetDeviceProperties( device = " << device << "),"
        << " failed with error: "
        << cudaGetErrorString(error));
  }


  if (properties.managedMemory == 1
      && properties.concurrentManagedAccess == 1) {
    error =
      ::cudaMemAdvise(src_ptr, length, cudaMemAdviseSetReadMostly, device);

    if (error != cudaSuccess) {
      UMPIRE_ERROR("cudaMemAdvise( src_ptr = " << src_ptr
        << ", length = " << length
        << ", cudaMemAdviseSetReadMostly, " << device << ") failed with error: "
        << cudaGetErrorString(error));
    }
  }
}

} // end of namespace op
} // end of namespace umpire