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Kokkos_Cuda_BasicAllocators.cpp
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Sun, Aug 4, 11:06

Kokkos_Cuda_BasicAllocators.cpp
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/*
//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#include <Kokkos_Macros.hpp>
/* only compile this file if CUDA is enabled for Kokkos */
#ifdef KOKKOS_HAVE_CUDA
#include <impl/Kokkos_Error.hpp>
#include <Cuda/Kokkos_Cuda_BasicAllocators.hpp>
#include <Cuda/Kokkos_Cuda_Error.hpp>
#include <sstream>
namespace Kokkos { namespace Impl {
/*--------------------------------------------------------------------------*/
TextureAttribute::TextureAttribute( void * const alloc_ptr
, size_t alloc_size
, cudaChannelFormatDesc const & desc
)
: m_tex_obj(0)
{
cuda_device_synchronize();
struct cudaResourceDesc resDesc ;
struct cudaTextureDesc texDesc ;
memset( & resDesc , 0 , sizeof(resDesc) );
memset( & texDesc , 0 , sizeof(texDesc) );
resDesc.resType = cudaResourceTypeLinear ;
resDesc.res.linear.desc = desc ;
resDesc.res.linear.sizeInBytes = alloc_size ;
resDesc.res.linear.devPtr = alloc_ptr ;
CUDA_SAFE_CALL( cudaCreateTextureObject( & m_tex_obj , & resDesc, & texDesc, NULL) );
cuda_device_synchronize();
}
TextureAttribute::~TextureAttribute()
{
if (m_tex_obj) {
cudaDestroyTextureObject( m_tex_obj );
}
}
/*--------------------------------------------------------------------------*/
void * CudaMallocAllocator::allocate( size_t size )
{
void * ptr = NULL;
CUDA_SAFE_CALL( cudaMalloc( &ptr, size ) );
return ptr;
}
void CudaMallocAllocator::deallocate( void * ptr, size_t /*size*/ )
{
try {
CUDA_SAFE_CALL( cudaFree( ptr ) );
} catch(...) {}
}
void * CudaMallocAllocator::reallocate(void * old_ptr, size_t old_size, size_t new_size)
{
void * ptr = old_ptr;
if (old_size != new_size) {
ptr = allocate( new_size );
size_t copy_size = old_size < new_size ? old_size : new_size;
CUDA_SAFE_CALL( cudaMemcpy( ptr , old_ptr , copy_size , cudaMemcpyDefault ) );
deallocate( old_ptr, old_size );
}
return ptr;
}
/*--------------------------------------------------------------------------*/
void * CudaUVMAllocator::allocate( size_t size )
{
#if defined( CUDA_VERSION ) && ( 6000 <= CUDA_VERSION )
void * ptr = NULL;
CUDA_SAFE_CALL( cudaMallocManaged( &ptr, size, cudaMemAttachGlobal ) );
return ptr;
#else
throw_runtime_exception( "CUDA VERSION does not support UVM" );
return NULL;
#endif
}
void CudaUVMAllocator::deallocate( void * ptr, size_t /*size*/ )
{
try {
CUDA_SAFE_CALL( cudaFree( ptr ) );
} catch(...) {}
}
void * CudaUVMAllocator::reallocate(void * old_ptr, size_t old_size, size_t new_size)
{
void * ptr = old_ptr;
if (old_size != new_size) {
ptr = allocate( new_size );
size_t copy_size = old_size < new_size ? old_size : new_size;
CUDA_SAFE_CALL( cudaMemcpy( ptr , old_ptr , copy_size , cudaMemcpyDefault ) );
deallocate( old_ptr, old_size );
}
return ptr;
}
/*--------------------------------------------------------------------------*/
void * CudaHostAllocator::allocate( size_t size )
{
void * ptr = NULL;
CUDA_SAFE_CALL( cudaHostAlloc( &ptr , size , cudaHostAllocDefault ) );
return ptr;
}
void CudaHostAllocator::deallocate( void * ptr, size_t /*size*/ )
{
try {
CUDA_SAFE_CALL( cudaFreeHost( ptr ) );
} catch(...) {}
}
void * CudaHostAllocator::reallocate(void * old_ptr, size_t old_size, size_t new_size)
{
void * ptr = old_ptr;
if (old_size != new_size) {
ptr = allocate( new_size );
size_t copy_size = old_size < new_size ? old_size : new_size;
CUDA_SAFE_CALL( cudaMemcpy( ptr , old_ptr , copy_size , cudaMemcpyHostToHost ) );
deallocate( old_ptr, old_size );
}
return ptr;
}
/*--------------------------------------------------------------------------*/
}} // namespace Kokkos::Impl
#endif //KOKKOS_HAVE_CUDA

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