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https://gitlab.kitware.com/vtk/vtk-m
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Add an example of using multiple backends from a single translation unit.
This commit is contained in:
Robert Maynard
parent
fc0ff69d04
commit
b1663b24b7
@ -21,4 +21,5 @@
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##=============================================================================
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add_subdirectory(hello_world)
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add_subdirectory(isosurface)
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add_subdirectory(isosurface)
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add_subdirectory(multi_backend)
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33
examples/multi_backend/CMakeLists.txt
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33
examples/multi_backend/CMakeLists.txt
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##=============================================================================
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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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##
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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 2015 Sandia Corporation.
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## Copyright 2015 UT-Battelle, LLC.
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## Copyright 2015 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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## 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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##=============================================================================
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cmake_minimum_required(VERSION 2.8.11)
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if(VTKm_Cuda_FOUND)
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cuda_add_executable(MultiBackend MultiBackend.cu)
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else()
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add_executable(MultiBackend MultiBackend.cxx)
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endif()
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if(VTKm_TBB_FOUND)
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target_link_libraries(MultiBackend ${TBB_LIBRARIES})
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endif()
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25
examples/multi_backend/MultiBackend.cu
Executable file
25
examples/multi_backend/MultiBackend.cu
Executable file
@ -0,0 +1,25 @@
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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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#define BOOST_SP_DISABLE_THREADS
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//This file merely exists so that we can simplify the logic for invoking
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//nvcc telling that cuda code exists.
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#include "MultiBackend.cxx"
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158
examples/multi_backend/MultiBackend.cxx
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158
examples/multi_backend/MultiBackend.cxx
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@ -0,0 +1,158 @@
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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 <iostream>
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#include <vtkm/Math.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/cont/cuda/DeviceAdapterCuda.h>
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#include <vtkm/cont/tbb/DeviceAdapterTBB.h>
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struct GenerateSurfaceWorklet : public vtkm::worklet::WorkletMapField
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{
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vtkm::Float32 t;
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GenerateSurfaceWorklet(vtkm::Float32 st) : t(st) {}
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typedef void ControlSignature( FieldIn<>, FieldOut<>, FieldOut<> );
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typedef void ExecutionSignature( _1, _2, _3 );
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template<typename T>
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VTKM_EXEC_EXPORT
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void operator()( const vtkm::Vec< T, 3 > & input,
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vtkm::Vec<T, 3> & output,
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vtkm::Vec<vtkm::UInt8, 4>& color ) const
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{
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output[0] = input[0];
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output[1] = 0.25f * vtkm::Sin( input[0] * 10.f + t ) * vtkm::Cos( input[2] * 10.f + t );
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output[2] = input[2];
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color[0] = 0;
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color[1] = 160 + static_cast<vtkm::UInt8>(96 * vtkm::Sin( input[0] * 10.f + t ) );
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color[2] = 160 + static_cast<vtkm::UInt8>(96 * vtkm::Cos( input[2] * 5.f + t ) );
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color[3] = 255;
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}
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};
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template<bool> struct CanRun;
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template<typename T, typename DeviceAdapterTag>
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void run_if_valid(vtkm::cont::ArrayHandle< vtkm::Vec< T, 3 > > inHandle,
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vtkm::cont::ArrayHandle< vtkm::Vec< T, 3 > > outCoords,
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vtkm::cont::ArrayHandle< vtkm::Vec< vtkm::UInt8, 4 > > outColors,
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DeviceAdapterTag tag)
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{
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typedef vtkm::cont::internal::DeviceAdapterTraits<DeviceAdapterTag>
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DeviceAdapterTraits;
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if(DeviceAdapterTraits::Valid)
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{
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std::cout << "Running a worklet on device adapter: "
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<< DeviceAdapterTraits::GetId() << std::endl;
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}
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else
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{
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std::cout << "Unable to run a worklet on device adapter: "
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<< DeviceAdapterTraits::GetId() << std::endl;
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}
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CanRun<DeviceAdapterTraits::Valid>::run(inHandle,outCoords,outColors,tag);
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}
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//Implementation that we call on device adapters we don't have support
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//enabled for
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template<>
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struct CanRun<false>
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{
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template<typename T, typename DeviceAdapterTag>
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static void run(vtkm::cont::ArrayHandle< vtkm::Vec< T, 3 > > vtkmNotUsed(inHandle),
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vtkm::cont::ArrayHandle< vtkm::Vec< T, 3 > > vtkmNotUsed(outCoords),
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vtkm::cont::ArrayHandle< vtkm::Vec< vtkm::UInt8, 4 > > vtkmNotUsed(outColors),
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DeviceAdapterTag)
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{
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}
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};
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//Implementation that we call on device adapters we do have support
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//enabled for
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template<>
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struct CanRun<true>
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{
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template<typename T, typename DeviceAdapterTag>
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static void run(vtkm::cont::ArrayHandle< vtkm::Vec< T, 3 > > inHandle,
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vtkm::cont::ArrayHandle< vtkm::Vec< T, 3 > > outCoords,
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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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}
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};
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template<typename T>
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std::vector< vtkm::Vec<T, 3> > make_testData(int size)
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{
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std::vector< vtkm::Vec< T, 3 > > data;
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data.reserve( static_cast<std::size_t>(size*size) );
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for (int i = 0; i < size; ++i )
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{
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for (int j = 0; j < size; ++j )
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{
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data.push_back( vtkm::Vec<T,3>( 2.f * i / size - 1.f,
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0.f,
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2.f * j / size - 1.f ) );
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}
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}
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return data;
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}
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int main(int, char**)
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{
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typedef vtkm::Vec< vtkm::Float32, 3 > FloatVec3;
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typedef vtkm::Vec< vtkm::UInt8, 4 > Uint8Vec4;
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std::vector< FloatVec3 > data = make_testData<vtkm::Float32>(1024);
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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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//make array handles for the data
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vtkm::cont::ArrayHandle< FloatVec3 > in = vtkm::cont::make_ArrayHandle(data);
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vtkm::cont::ArrayHandle< FloatVec3 > out;
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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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}
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