mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 21:33:55 +00:00
79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#include <vtkm/cont/cuda/internal/DeviceAdapterRuntimeDetectorCuda.h>
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#ifdef VTKM_CUDA
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#include <mutex>
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#include <cuda.h>
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#include <vtkm/Math.h>
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#include <vtkm/cont/cuda/ErrorCuda.h>
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namespace
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{
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static std::once_flag deviceQueryFlag;
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static int numDevices = 0;
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static int archVersion = 0;
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void queryNumberOfDevicesandHighestArchSupported(vtkm::Int32& nod, vtkm::Int32& has)
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{
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// We currently cannot use RuntimeDeviceInformation{}.GetRuntimeConfiguration(
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// vtkm::cont::DeviceAdapterTagCuda()) in this function due to constraints in
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// initialize that query device Existence before we initialize the Runtime
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// Configuration. Once those constraints are removed/fixed this file can be
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// updated to use that call instead of directly querying the cuda device
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std::call_once(deviceQueryFlag, []() {
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//first query for the number of devices
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auto res = cudaGetDeviceCount(&numDevices);
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if (res != cudaSuccess)
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{
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numDevices = 0;
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}
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for (vtkm::Int32 i = 0; i < numDevices; i++)
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{
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cudaDeviceProp prop;
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res = cudaGetDeviceProperties(&prop, i);
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if (res == cudaSuccess)
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{
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const vtkm::Int32 arch = (prop.major * 10) + prop.minor;
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archVersion = vtkm::Max(arch, archVersion);
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}
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}
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});
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nod = numDevices;
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has = archVersion;
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}
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} // anonymous namspace
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#endif
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namespace vtkm
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{
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namespace cont
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{
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DeviceAdapterRuntimeDetector<vtkm::cont::DeviceAdapterTagCuda>::DeviceAdapterRuntimeDetector()
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: NumberOfDevices(0)
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, HighestArchSupported(0)
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{
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#ifdef VTKM_CUDA
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queryNumberOfDevicesandHighestArchSupported(this->NumberOfDevices, this->HighestArchSupported);
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#endif
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}
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bool DeviceAdapterRuntimeDetector<vtkm::cont::DeviceAdapterTagCuda>::Exists() const
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{
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return this->NumberOfDevices > 0 && this->HighestArchSupported >= 30;
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}
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}
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} // namespace vtkm::cont
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