bd042ec567
Unified memory is now used when we detect that the hardware supports it.
117 lines
3.8 KiB
Plaintext
117 lines
3.8 KiB
Plaintext
//============================================================================
|
|
// Copyright (c) Kitware, Inc.
|
|
// All rights reserved.
|
|
// See LICENSE.txt for details.
|
|
// This software is distributed WITHOUT ANY WARRANTY; without even
|
|
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
// PURPOSE. See the above copyright notice for more information.
|
|
//
|
|
// Copyright 2017 Sandia Corporation.
|
|
// Copyright 2017 UT-Battelle, LLC.
|
|
// Copyright 2017 Los Alamos National Security.
|
|
//
|
|
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
|
|
// the U.S. Government retains certain rights in this software.
|
|
//
|
|
// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
|
|
// Laboratory (LANL), the U.S. Government retains certain rights in
|
|
// this software.
|
|
//============================================================================
|
|
|
|
#define vtk_m_cont_cuda_internal_ArrayManagerExecutionCuda_cu
|
|
|
|
#include <vtkm/cont/cuda/internal/ArrayManagerExecutionCuda.h>
|
|
#include <vtkm/cont/cuda/internal/CudaAllocator.h>
|
|
|
|
using vtkm::cont::cuda::internal::CudaAllocator;
|
|
|
|
namespace vtkm
|
|
{
|
|
namespace cont
|
|
{
|
|
namespace internal
|
|
{
|
|
|
|
ExecutionArrayInterfaceBasic<DeviceAdapterTagCuda>::ExecutionArrayInterfaceBasic(
|
|
StorageBasicBase& storage)
|
|
: Superclass(storage)
|
|
{
|
|
}
|
|
|
|
DeviceAdapterId ExecutionArrayInterfaceBasic<DeviceAdapterTagCuda>::GetDeviceId() const
|
|
{
|
|
return VTKM_DEVICE_ADAPTER_CUDA;
|
|
}
|
|
|
|
void ExecutionArrayInterfaceBasic<DeviceAdapterTagCuda>::Allocate(TypelessExecutionArray& execArray,
|
|
vtkm::Id numBytes) const
|
|
{
|
|
if (execArray.Array != nullptr)
|
|
{
|
|
const vtkm::Id cap =
|
|
static_cast<char*>(execArray.ArrayCapacity) - static_cast<char*>(execArray.Array);
|
|
|
|
if (cap < numBytes)
|
|
{ // Current allocation too small -- free & realloc
|
|
this->Free(execArray);
|
|
}
|
|
else
|
|
{ // Reuse buffer if possible:
|
|
execArray.ArrayEnd = static_cast<char*>(execArray.Array) + numBytes;
|
|
return;
|
|
}
|
|
}
|
|
|
|
VTKM_ASSERT(execArray.Array == nullptr);
|
|
|
|
// Attempt to allocate:
|
|
try
|
|
{
|
|
// Cast to char* so that the pointer math below will work.
|
|
char* tmp = static_cast<char*>(CudaAllocator::Allocate(static_cast<size_t>(numBytes)));
|
|
execArray.Array = tmp;
|
|
execArray.ArrayEnd = tmp + numBytes;
|
|
execArray.ArrayCapacity = tmp + numBytes;
|
|
}
|
|
catch (const std::exception& error)
|
|
{
|
|
std::ostringstream err;
|
|
err << "Failed to allocate " << numBytes << " bytes on device: " << error.what();
|
|
throw vtkm::cont::ErrorBadAllocation(err.str());
|
|
}
|
|
}
|
|
|
|
void ExecutionArrayInterfaceBasic<DeviceAdapterTagCuda>::Free(
|
|
TypelessExecutionArray& execArray) const
|
|
{
|
|
if (execArray.Array != nullptr)
|
|
{
|
|
CudaAllocator::Free(execArray.Array);
|
|
execArray.Array = nullptr;
|
|
execArray.ArrayEnd = nullptr;
|
|
execArray.ArrayCapacity = nullptr;
|
|
}
|
|
}
|
|
|
|
void ExecutionArrayInterfaceBasic<DeviceAdapterTagCuda>::CopyFromControl(const void* controlPtr,
|
|
void* executionPtr,
|
|
vtkm::Id numBytes) const
|
|
{
|
|
VTKM_CUDA_CALL(cudaMemcpy(
|
|
executionPtr, controlPtr, static_cast<std::size_t>(numBytes), cudaMemcpyHostToDevice));
|
|
}
|
|
|
|
void ExecutionArrayInterfaceBasic<DeviceAdapterTagCuda>::CopyToControl(const void* executionPtr,
|
|
void* controlPtr,
|
|
vtkm::Id numBytes) const
|
|
{
|
|
VTKM_CUDA_CALL(cudaMemcpy(
|
|
controlPtr, executionPtr, static_cast<std::size_t>(numBytes), cudaMemcpyDeviceToHost));
|
|
}
|
|
|
|
} // end namespace internal
|
|
|
|
VTKM_INSTANTIATE_ARRAYHANDLES_FOR_DEVICE_ADAPTER(DeviceAdapterTagCuda)
|
|
}
|
|
} // end vtkm::cont
|