Adding vtkm::cont::RuntimeDeviceInformation.
The RuntimeDeviceInformation class allows developers to check if a given device is supported on a machine at runtime. This allows developers to properly check for CUDA support before running any worklets.
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@ -21,6 +21,8 @@
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#include <vtkm/Math.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/RuntimeDeviceInformation.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/WorkletMapField.h>
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@ -104,13 +106,23 @@ struct CanRun<true>
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vtkm::cont::ArrayHandle< vtkm::Vec< vtkm::UInt8, 4 > > outColors,
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DeviceAdapterTag)
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{
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typedef vtkm::worklet::DispatcherMapField<GenerateSurfaceWorklet,
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DeviceAdapterTag> DispatcherType;
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GenerateSurfaceWorklet worklet( 0.05f );
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DispatcherType(worklet).Invoke( inHandle,
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outCoords,
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outColors);
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//even though we have support for this device adapter we haven't determined
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//if we actually have run-time support. This is a significant issue with
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//the CUDA backend
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vtkm::cont::RuntimeDeviceInformation<DeviceAdapterTag> runtime;
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const bool haveSupport = runtime.Exists();
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if(haveSupport)
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{
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typedef vtkm::worklet::DispatcherMapField<GenerateSurfaceWorklet,
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DeviceAdapterTag> DispatcherType;
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GenerateSurfaceWorklet worklet( 0.05f );
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DispatcherType(worklet).Invoke( inHandle,
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outCoords,
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outColors);
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}
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}
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};
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@ -149,11 +161,9 @@ int main(int, char**)
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vtkm::cont::ArrayHandle< Uint8Vec4 > color;
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//Run the algorithm on all backends that we have compiled support for.
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run_if_valid(in, out, color, SerialTag());
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run_if_valid(in, out, color, CudaTag());
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run_if_valid(in, out, color, TBBTag());
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run_if_valid(in, out, color, SerialTag());
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}
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@ -496,6 +496,33 @@ public:
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}
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};
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/// \brief Class providing a device-specific runtime support detector.
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///
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/// The class provide the actual implementation used by
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/// vtkm::cont::RuntimeDeviceInformation.
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///
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/// A default implementation is provided but device adapters which require
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/// physical hardware or other special runtime requirements should provide
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/// one (in conjunction with DeviceAdapterAlgorithm) where appropriate.
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///
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template<class DeviceAdapterTag>
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class DeviceAdapterRuntimeDetector
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{
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public:
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/// Returns true if the given device adapter is supported on the current
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/// machine.
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///
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/// The default implementation is to return the value of
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/// vtkm::cont::DeviceAdapterTraits<DeviceAdapterTag>::Valid
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///
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VTKM_CONT_EXPORT bool Exists() const
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{
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typedef vtkm::cont::DeviceAdapterTraits<DeviceAdapterTag> DeviceAdapterTraits;
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return DeviceAdapterTraits::Valid;
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}
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};
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}
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} // namespace vtkm::cont
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57
vtkm/cont/RuntimeDeviceInformation.h
Normal file
57
vtkm/cont/RuntimeDeviceInformation.h
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@ -0,0 +1,57 @@
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//============================================================================
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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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// 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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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_cont_RuntimeDeviceInformation_h
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#define vtk_m_cont_RuntimeDeviceInformation_h
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#include <vtkm/cont/DeviceAdapter.h>
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namespace vtkm {
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namespace cont {
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/// A class that can be used to determine if a given device adapter
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/// is supported on the current machine at runtime. This is very important
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/// for device adapters that a physical hardware requirements such as a GPU
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/// or a Accelerator Card.
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///
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///
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template<class Device = VTKM_DEFAULT_DEVICE_ADAPTER_TAG>
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class RuntimeDeviceInformation
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{
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public:
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VTKM_CONT_EXPORT
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RuntimeDeviceInformation() : RuntimeImplementation() { }
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/// Returns true if the given device adapter is supported on the current
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/// machine.
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///
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VTKM_CONT_EXPORT
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bool Exists() const
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{
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return this->RuntimeImplementation.Exists();
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}
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private:
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vtkm::cont::DeviceAdapterRuntimeDetector<Device> RuntimeImplementation;
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};
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}
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} // namespace vtkm::cont
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#endif //vtk_m_cont_RuntimeDeviceInformation_h
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@ -26,11 +26,31 @@
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#include <vtkm/cont/DeviceAdapterAlgorithm.h>
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#include <vtkm/cont/ErrorControlInternal.h>
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#include <vtkm/Math.h>
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// Here are the actual implementation of the algorithms.
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#include <vtkm/cont/cuda/internal/DeviceAdapterAlgorithmThrust.h>
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#include <cuda.h>
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namespace vtkm {
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namespace cont {
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namespace cuda {
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namespace internal {
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static
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__global__
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void DetermineIfValidCudaDevice()
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{
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//used only to see if we can launch kernels. It is possible to have a
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//CUDA capable device, but still fail to have CUDA support.
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}
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}
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}
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}
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}
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namespace vtkm {
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namespace cont {
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@ -94,6 +114,80 @@ private:
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cudaEvent_t EndEvent;
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};
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/// \brief Class providing a CUDA runtime support detector.
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///
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/// The class provide the actual implementation used by
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/// vtkm::cont::RuntimeDeviceInformation for the CUDA backend.
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///
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/// We will verify at runtime that the machine has at least one CUDA
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/// capable device, and said device is from the 'fermi' (SM_20) generation
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/// or newer.
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///
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template<>
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class DeviceAdapterRuntimeDetector<vtkm::cont::DeviceAdapterTagCuda>
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{
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public:
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VTKM_CONT_EXPORT DeviceAdapterRuntimeDetector():
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NumberOfDevices(0),
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HighestArchSupported(0)
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{
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static bool deviceQueryInit = false;
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static int numDevices = 0;
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static int archVersion = 0;
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if(!deviceQueryInit)
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{
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deviceQueryInit = true;
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//first query for the number of devices
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cudaGetDeviceCount(&numDevices);
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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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cudaGetDeviceProperties(&prop, i);
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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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//Make sure we can actually launch a kernel. This could fail for any
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//of the following reasons:
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//
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// 1. cudaErrorInsufficientDriver, caused by out of data drives
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// 2. cudaErrorDevicesUnavailable, caused by another process locking the
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// device or somebody disabling cuda support on the device
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// 3. cudaErrorNoKernelImageForDevice we built for a compute version
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// greater than the device we are running on
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// Most likely others that I don't even know about
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vtkm::cont::cuda::internal::DetermineIfValidCudaDevice <<<1,1>>> ();
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if(cudaSuccess != cudaGetLastError())
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{
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numDevices = 0;
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archVersion = 0;
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}
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}
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this->NumberOfDevices = numDevices;
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this->HighestArchSupported = archVersion;
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}
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/// Returns true if the given device adapter is supported on the current
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/// machine.
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///
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/// Only returns true if we have at-least one CUDA capable device of SM_20 or
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/// greater ( fermi ).
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///
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VTKM_CONT_EXPORT bool Exists() const
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{
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//
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return this->NumberOfDevices > 0 && this->HighestArchSupported >= 20;
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}
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private:
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vtkm::Int32 NumberOfDevices;
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vtkm::Int32 HighestArchSupported;
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};
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}
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} // namespace vtkm::cont
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@ -53,6 +53,7 @@ set(unit_tests
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UnitTestDeviceAdapterSerial.cxx
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UnitTestDynamicArrayHandle.cxx
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UnitTestDynamicCellSet.cxx
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UnitTestRuntimeDeviceInformation.cxx
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UnitTestStorageBasic.cxx
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UnitTestStorageImplicit.cxx
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UnitTestStorageListTag.cxx
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@ -30,6 +30,7 @@
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#include <vtkm/cont/ArrayPortalToIterators.h>
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#include <vtkm/cont/ErrorControlBadAllocation.h>
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#include <vtkm/cont/ErrorExecution.h>
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#include <vtkm/cont/RuntimeDeviceInformation.h>
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#include <vtkm/cont/StorageBasic.h>
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#include <vtkm/cont/Timer.h>
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#include <vtkm/cont/DeviceAdapterAlgorithm.h>
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@ -415,6 +416,18 @@ private:
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"Timer counted too far or system really busy.");
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}
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VTKM_CONT_EXPORT
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static void TestRuntime()
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{
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std::cout << "-------------------------------------------" << std::endl;
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std::cout << "Testing RuntimeDeviceInformation" << std::endl;
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vtkm::cont::RuntimeDeviceInformation<DeviceAdapterTag> runtime;
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const bool valid_runtime = runtime.Exists();
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VTKM_TEST_ASSERT(valid_runtime, "runtime detection failed for device");
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}
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static VTKM_CONT_EXPORT void TestAlgorithmSchedule()
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{
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std::cout << "-------------------------------------------" << std::endl;
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@ -1550,6 +1563,7 @@ private:
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TestArrayManagerExecution();
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TestOutOfMemory();
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TestTimer();
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TestRuntime();
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TestAlgorithmSchedule();
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TestErrorExecution();
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86
vtkm/cont/testing/UnitTestRuntimeDeviceInformation.cxx
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86
vtkm/cont/testing/UnitTestRuntimeDeviceInformation.cxx
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//============================================================================
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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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// 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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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#include <vtkm/cont/RuntimeDeviceInformation.h>
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//include all backends
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#include <vtkm/cont/cuda/DeviceAdapterCuda.h>
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#include <vtkm/cont/tbb/DeviceAdapterTBB.h>
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#include <vtkm/cont/DeviceAdapterSerial.h>
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#include <vtkm/cont/testing/Testing.h>
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namespace {
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template<bool> struct DoesExist;
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template<typename DeviceAdapterTag>
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void detect_if_exists(DeviceAdapterTag tag)
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{
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typedef vtkm::cont::DeviceAdapterTraits<DeviceAdapterTag> DeviceAdapterTraits;
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DoesExist<DeviceAdapterTraits::Valid>::Exist(tag);
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}
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template<>
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struct DoesExist<false>
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{
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template<typename DeviceAdapterTag>
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static void Exist(DeviceAdapterTag)
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{
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//runtime information for this device should return false
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vtkm::cont::RuntimeDeviceInformation<DeviceAdapterTag> runtime;
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VTKM_TEST_ASSERT(runtime.Exists() == false,
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"A backend with zero compile time support, can't have runtime support");
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}
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};
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template<>
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struct DoesExist<true>
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{
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template<typename DeviceAdapterTag>
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static void Exist(DeviceAdapterTag)
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{
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//runtime information for this device should return true
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vtkm::cont::RuntimeDeviceInformation<DeviceAdapterTag> runtime;
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VTKM_TEST_ASSERT(runtime.Exists() == true,
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"A backend with compile time support, should have runtime support");
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}
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};
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void Detection()
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{
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typedef ::vtkm::cont::DeviceAdapterTagSerial SerialTag;
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typedef ::vtkm::cont::DeviceAdapterTagTBB TBBTag;
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typedef ::vtkm::cont::DeviceAdapterTagCuda CudaTag;
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//Verify that for each device adapter we compile code for, that it
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//has valid runtime support.
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detect_if_exists(CudaTag());
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detect_if_exists(TBBTag());
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detect_if_exists(SerialTag());
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}
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} // anonymous namespace
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int UnitTestRuntimeDeviceInformation(int, char *[])
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{
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return vtkm::cont::testing::Testing::Run(Detection);
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}
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@ -114,7 +114,7 @@ struct DoTestWorklet
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void TestWorkletMapFieldExecArg()
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{
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typedef vtkm::cont::internal::DeviceAdapterTraits<
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typedef vtkm::cont::DeviceAdapterTraits<
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VTKM_DEFAULT_DEVICE_ADAPTER_TAG> DeviceAdapterTraits;
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std::cout << "Testing Worklet with WholeArray on device adapter: "
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<< DeviceAdapterTraits::GetId() << std::endl;
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