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https://gitlab.kitware.com/vtk/vtk-m
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Add benchmark for atomic arrays.
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581
benchmarking/BenchmarkAtomicArray.cxx
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581
benchmarking/BenchmarkAtomicArray.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 2018 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2018 UT-Battelle, LLC.
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// Copyright 2018 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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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 "Benchmarker.h"
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/AtomicArray.h>
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#include <vtkm/cont/RuntimeDeviceTracker.h>
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#include <vtkm/cont/Timer.h>
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#include <vtkm/exec/FunctorBase.h>
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#include <iomanip>
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#include <sstream>
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#include <string>
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namespace vtkm
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{
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namespace benchmarking
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{
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// This is 32x larger than the largest array size.
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static constexpr vtkm::Id NumWrites = 33554432; // 2^25
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#define MAKE_ATOMIC_BENCHMARKS(Name, Class) \
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VTKM_MAKE_BENCHMARK(Name##1, Class, 1); \
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VTKM_MAKE_BENCHMARK(Name##8, Class, 8); \
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VTKM_MAKE_BENCHMARK(Name##32, Class, 32); \
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VTKM_MAKE_BENCHMARK(Name##512, Class, 512); \
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VTKM_MAKE_BENCHMARK(Name##2048, Class, 2048); \
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VTKM_MAKE_BENCHMARK(Name##32768, Class, 32768); \
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VTKM_MAKE_BENCHMARK(Name##1048576, Class, 1048576)
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#define RUN_ATOMIC_BENCHMARKS(Name) \
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VTKM_RUN_BENCHMARK(Name##1, vtkm::cont::AtomicArrayTypeListTag{}); \
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VTKM_RUN_BENCHMARK(Name##8, vtkm::cont::AtomicArrayTypeListTag{}); \
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VTKM_RUN_BENCHMARK(Name##32, vtkm::cont::AtomicArrayTypeListTag{}); \
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VTKM_RUN_BENCHMARK(Name##512, vtkm::cont::AtomicArrayTypeListTag{}); \
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VTKM_RUN_BENCHMARK(Name##2048, vtkm::cont::AtomicArrayTypeListTag{}); \
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VTKM_RUN_BENCHMARK(Name##32768, vtkm::cont::AtomicArrayTypeListTag{}); \
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VTKM_RUN_BENCHMARK(Name##1048576, vtkm::cont::AtomicArrayTypeListTag{})
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template <class Device>
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class BenchmarkAtomicArray
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{
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public:
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using Algo = vtkm::cont::DeviceAdapterAlgorithm<Device>;
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using Timer = vtkm::cont::Timer<Device>;
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// Benchmarks AtomicArray::Add such that each work index writes to adjacent
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// indices.
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template <typename ValueType>
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struct BenchAddSeq
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{
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vtkm::Id ArraySize;
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vtkm::cont::ArrayHandle<ValueType> Data;
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template <typename PortalType>
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struct Worker : public vtkm::exec::FunctorBase
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{
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vtkm::Id ArraySize;
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PortalType Portal;
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VTKM_CONT
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Worker(vtkm::Id arraySize, PortalType portal)
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: ArraySize(arraySize)
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, Portal(portal)
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{
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}
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VTKM_EXEC
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void operator()(vtkm::Id i) const { this->Portal.Add(i % this->ArraySize, 1); }
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};
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BenchAddSeq(vtkm::Id arraySize)
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: ArraySize(arraySize)
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{
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this->Data.PrepareForOutput(this->ArraySize, Device{});
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}
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VTKM_CONT
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vtkm::Float64 operator()()
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{
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vtkm::cont::AtomicArray<ValueType> array(this->Data);
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auto portal = array.PrepareForExecution(Device{});
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Worker<decltype(portal)> worker{ this->ArraySize, portal };
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Timer timer;
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Algo::Schedule(worker, NumWrites);
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return timer.GetElapsedTime();
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}
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VTKM_CONT
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std::string Description() const
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{
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std::ostringstream desc;
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desc << "Add (Seq, Atomic, " << std::setw(7) << std::setfill('0') << this->ArraySize << ")";
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return desc.str();
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}
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};
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MAKE_ATOMIC_BENCHMARKS(AddSeq, BenchAddSeq);
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// Provides a non-atomic baseline for BenchAddSeq
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template <typename ValueType>
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struct BenchAddSeqBaseline
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{
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vtkm::Id ArraySize;
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vtkm::cont::ArrayHandle<ValueType> Data;
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template <typename PortalType>
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struct Worker : public vtkm::exec::FunctorBase
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{
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vtkm::Id ArraySize;
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PortalType Portal;
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VTKM_CONT
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Worker(vtkm::Id arraySize, PortalType portal)
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: ArraySize(arraySize)
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, Portal(portal)
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{
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}
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VTKM_EXEC
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void operator()(vtkm::Id i) const
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{
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vtkm::Id idx = i % this->ArraySize;
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this->Portal.Set(idx, this->Portal.Get(idx) + 1);
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}
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};
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BenchAddSeqBaseline(vtkm::Id arraySize)
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: ArraySize(arraySize)
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{
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}
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VTKM_CONT
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vtkm::Float64 operator()()
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{
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auto portal = this->Data.PrepareForOutput(this->ArraySize, Device{});
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Worker<decltype(portal)> worker{ this->ArraySize, portal };
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Timer timer;
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Algo::Schedule(worker, NumWrites);
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return timer.GetElapsedTime();
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}
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VTKM_CONT
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std::string Description() const
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{
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std::ostringstream desc;
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desc << "Add (Seq, Baseline, " << std::setw(7) << std::setfill('0') << this->ArraySize << ")";
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return desc.str();
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}
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};
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MAKE_ATOMIC_BENCHMARKS(AddSeqBase, BenchAddSeqBaseline);
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// Benchmarks AtomicArray::Add such that each work index writes to a strided
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// index ( floor(i / stride) + stride * (i % stride)
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template <typename ValueType>
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struct BenchAddStride
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{
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vtkm::Id ArraySize;
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vtkm::Id Stride;
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vtkm::cont::ArrayHandle<ValueType> Data;
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template <typename PortalType>
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struct Worker : public vtkm::exec::FunctorBase
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{
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vtkm::Id ArraySize;
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vtkm::Id Stride;
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PortalType Portal;
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VTKM_CONT
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Worker(vtkm::Id arraySize, vtkm::Id stride, PortalType portal)
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: ArraySize(arraySize)
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, Stride(stride)
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, Portal(portal)
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{
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}
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VTKM_EXEC
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void operator()(vtkm::Id i) const
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{
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vtkm::Id idx = (i / this->Stride + this->Stride * (i % this->Stride)) % this->ArraySize;
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this->Portal.Add(idx % this->ArraySize, 1);
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}
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};
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BenchAddStride(vtkm::Id arraySize, vtkm::Id stride = 32)
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: ArraySize(arraySize)
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, Stride(stride)
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{
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this->Data.PrepareForOutput(this->ArraySize, Device{});
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}
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VTKM_CONT
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vtkm::Float64 operator()()
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{
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vtkm::cont::AtomicArray<ValueType> array(this->Data);
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auto portal = array.PrepareForExecution(Device{});
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Worker<decltype(portal)> worker{ this->ArraySize, this->Stride, portal };
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Timer timer;
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Algo::Schedule(worker, NumWrites);
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return timer.GetElapsedTime();
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}
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VTKM_CONT
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std::string Description() const
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{
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std::ostringstream desc;
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desc << "Add (Stride=" << this->Stride << ", Atomic, " << std::setw(7) << std::setfill('0')
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<< this->ArraySize << ")";
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return desc.str();
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}
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};
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MAKE_ATOMIC_BENCHMARKS(AddStride, BenchAddStride);
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// Non-atomic baseline for AddStride
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template <typename ValueType>
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struct BenchAddStrideBaseline
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{
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vtkm::Id ArraySize;
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vtkm::Id Stride;
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vtkm::cont::ArrayHandle<ValueType> Data;
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template <typename PortalType>
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struct Worker : public vtkm::exec::FunctorBase
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{
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vtkm::Id ArraySize;
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vtkm::Id Stride;
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PortalType Portal;
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VTKM_CONT
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Worker(vtkm::Id arraySize, vtkm::Id stride, PortalType portal)
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: ArraySize(arraySize)
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, Stride(stride)
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, Portal(portal)
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{
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}
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VTKM_EXEC
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void operator()(vtkm::Id i) const
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{
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vtkm::Id idx = (i / this->Stride + this->Stride * (i % this->Stride)) % this->ArraySize;
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this->Portal.Set(idx, this->Portal.Get(idx) + 1);
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}
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};
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BenchAddStrideBaseline(vtkm::Id arraySize, vtkm::Id stride = 32)
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: ArraySize(arraySize)
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, Stride(stride)
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{
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}
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VTKM_CONT
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vtkm::Float64 operator()()
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{
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auto portal = this->Data.PrepareForOutput(this->ArraySize, Device{});
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Worker<decltype(portal)> worker{ this->ArraySize, this->Stride, portal };
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Timer timer;
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Algo::Schedule(worker, NumWrites);
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return timer.GetElapsedTime();
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}
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VTKM_CONT
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std::string Description() const
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{
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std::ostringstream desc;
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desc << "Add (Stride=" << this->Stride << ", Baseline, " << std::setw(7) << std::setfill('0')
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<< this->ArraySize << ")";
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return desc.str();
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}
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};
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MAKE_ATOMIC_BENCHMARKS(AddStrideBase, BenchAddStrideBaseline);
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// Benchmarks AtomicArray::CompareAndSwap such that each work index writes to adjacent
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// indices.
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template <typename ValueType>
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struct BenchCASSeq
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{
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vtkm::Id ArraySize;
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vtkm::cont::ArrayHandle<ValueType> Data;
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template <typename PortalType>
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struct Worker : public vtkm::exec::FunctorBase
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{
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vtkm::Id ArraySize;
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PortalType Portal;
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VTKM_CONT
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Worker(vtkm::Id arraySize, PortalType portal)
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: ArraySize(arraySize)
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, Portal(portal)
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{
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}
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VTKM_EXEC
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void operator()(vtkm::Id i) const
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{
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vtkm::Id idx = i % this->ArraySize;
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ValueType val = static_cast<ValueType>(i);
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// Get the old val with a no-op
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ValueType oldVal = this->Portal.Add(idx, static_cast<ValueType>(0));
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ValueType assumed = static_cast<ValueType>(0);
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do
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{
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assumed = oldVal;
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oldVal = this->Portal.CompareAndSwap(idx, assumed + val, assumed);
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} while (assumed != oldVal);
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}
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};
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BenchCASSeq(vtkm::Id arraySize)
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: ArraySize(arraySize)
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{
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this->Data.PrepareForOutput(this->ArraySize, Device{});
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}
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VTKM_CONT
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vtkm::Float64 operator()()
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{
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vtkm::cont::AtomicArray<ValueType> array(this->Data);
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auto portal = array.PrepareForExecution(Device{});
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Worker<decltype(portal)> worker{ this->ArraySize, portal };
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Timer timer;
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Algo::Schedule(worker, NumWrites);
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return timer.GetElapsedTime();
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}
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VTKM_CONT
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std::string Description() const
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{
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std::ostringstream desc;
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desc << "CAS (Seq, Atomic, " << std::setw(7) << std::setfill('0') << this->ArraySize << ")";
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return desc.str();
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}
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};
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MAKE_ATOMIC_BENCHMARKS(CASSeq, BenchCASSeq);
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// Provides a non-atomic baseline for BenchCASSeq
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template <typename ValueType>
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struct BenchCASSeqBaseline
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{
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vtkm::Id ArraySize;
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vtkm::cont::ArrayHandle<ValueType> Data;
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template <typename PortalType>
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struct Worker : public vtkm::exec::FunctorBase
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{
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vtkm::Id ArraySize;
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PortalType Portal;
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VTKM_CONT
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Worker(vtkm::Id arraySize, PortalType portal)
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: ArraySize(arraySize)
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, Portal(portal)
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{
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}
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VTKM_EXEC
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void operator()(vtkm::Id i) const
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{
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vtkm::Id idx = i % this->ArraySize;
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ValueType val = static_cast<ValueType>(i);
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ValueType oldVal = this->Portal.Get(idx);
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this->Portal.Set(idx, oldVal + val);
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}
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};
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BenchCASSeqBaseline(vtkm::Id arraySize)
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: ArraySize(arraySize)
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{
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}
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VTKM_CONT
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vtkm::Float64 operator()()
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{
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auto portal = this->Data.PrepareForOutput(this->ArraySize, Device{});
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Worker<decltype(portal)> worker{ this->ArraySize, portal };
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Timer timer;
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Algo::Schedule(worker, NumWrites);
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return timer.GetElapsedTime();
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}
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VTKM_CONT
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std::string Description() const
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{
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std::ostringstream desc;
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desc << "CAS (Seq, Baseline, " << std::setw(7) << std::setfill('0') << this->ArraySize << ")";
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return desc.str();
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}
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};
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MAKE_ATOMIC_BENCHMARKS(CASSeqBase, BenchCASSeqBaseline);
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// Benchmarks AtomicArray::CompareAndSwap such that each work index writes to
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// a strided index:
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// ( floor(i / stride) + stride * (i % stride)
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template <typename ValueType>
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struct BenchCASStride
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{
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vtkm::Id ArraySize;
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vtkm::Id Stride;
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vtkm::cont::ArrayHandle<ValueType> Data;
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template <typename PortalType>
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struct Worker : public vtkm::exec::FunctorBase
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{
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vtkm::Id ArraySize;
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vtkm::Id Stride;
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PortalType Portal;
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VTKM_CONT
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Worker(vtkm::Id arraySize, vtkm::Id stride, PortalType portal)
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: ArraySize(arraySize)
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, Stride(stride)
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, Portal(portal)
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{
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}
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VTKM_EXEC
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void operator()(vtkm::Id i) const
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{
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vtkm::Id idx = (i / this->Stride + this->Stride * (i % this->Stride)) % this->ArraySize;
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ValueType val = static_cast<ValueType>(i);
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// Get the old val with a no-op
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ValueType oldVal = this->Portal.Add(idx, static_cast<ValueType>(0));
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ValueType assumed = static_cast<ValueType>(0);
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do
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{
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assumed = oldVal;
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oldVal = this->Portal.CompareAndSwap(idx, assumed + val, assumed);
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} while (assumed != oldVal);
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}
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};
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BenchCASStride(vtkm::Id arraySize, vtkm::Id stride = 32)
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: ArraySize(arraySize)
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, Stride(stride)
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{
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this->Data.PrepareForOutput(this->ArraySize, Device{});
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}
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VTKM_CONT
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vtkm::Float64 operator()()
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{
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vtkm::cont::AtomicArray<ValueType> array(this->Data);
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auto portal = array.PrepareForExecution(Device{});
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Worker<decltype(portal)> worker{ this->ArraySize, this->Stride, portal };
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Timer timer;
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Algo::Schedule(worker, NumWrites);
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return timer.GetElapsedTime();
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}
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VTKM_CONT
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std::string Description() const
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{
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std::ostringstream desc;
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desc << "CAS (Stride=" << this->Stride << ", Atomic, " << std::setw(7) << std::setfill('0')
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<< this->ArraySize << ")";
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return desc.str();
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}
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};
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MAKE_ATOMIC_BENCHMARKS(CASStride, BenchCASStride);
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// Non-atomic baseline for CASStride
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template <typename ValueType>
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struct BenchCASStrideBaseline
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{
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vtkm::Id ArraySize;
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vtkm::Id Stride;
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vtkm::cont::ArrayHandle<ValueType> Data;
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template <typename PortalType>
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struct Worker : public vtkm::exec::FunctorBase
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{
|
||||
vtkm::Id ArraySize;
|
||||
vtkm::Id Stride;
|
||||
PortalType Portal;
|
||||
|
||||
VTKM_CONT
|
||||
Worker(vtkm::Id arraySize, vtkm::Id stride, PortalType portal)
|
||||
: ArraySize(arraySize)
|
||||
, Stride(stride)
|
||||
, Portal(portal)
|
||||
{
|
||||
}
|
||||
|
||||
VTKM_EXEC
|
||||
void operator()(vtkm::Id i) const
|
||||
{
|
||||
vtkm::Id idx = (i / this->Stride + this->Stride * (i % this->Stride)) % this->ArraySize;
|
||||
ValueType val = static_cast<ValueType>(i);
|
||||
ValueType oldVal = this->Portal.Get(idx);
|
||||
this->Portal.Set(idx, oldVal + val);
|
||||
}
|
||||
};
|
||||
|
||||
BenchCASStrideBaseline(vtkm::Id arraySize, vtkm::Id stride = 32)
|
||||
: ArraySize(arraySize)
|
||||
, Stride(stride)
|
||||
{
|
||||
}
|
||||
|
||||
VTKM_CONT
|
||||
vtkm::Float64 operator()()
|
||||
{
|
||||
auto portal = this->Data.PrepareForOutput(this->ArraySize, Device{});
|
||||
Worker<decltype(portal)> worker{ this->ArraySize, this->Stride, portal };
|
||||
|
||||
Timer timer;
|
||||
Algo::Schedule(worker, NumWrites);
|
||||
return timer.GetElapsedTime();
|
||||
}
|
||||
|
||||
VTKM_CONT
|
||||
std::string Description() const
|
||||
{
|
||||
std::ostringstream desc;
|
||||
desc << "CAS (Stride=" << this->Stride << ", Baseline, " << std::setw(7) << std::setfill('0')
|
||||
<< this->ArraySize << ")";
|
||||
return desc.str();
|
||||
}
|
||||
};
|
||||
MAKE_ATOMIC_BENCHMARKS(CASStrideBase, BenchCASStrideBaseline);
|
||||
|
||||
static void Run()
|
||||
{
|
||||
RUN_ATOMIC_BENCHMARKS(AddSeq);
|
||||
RUN_ATOMIC_BENCHMARKS(AddSeqBase);
|
||||
RUN_ATOMIC_BENCHMARKS(AddStride);
|
||||
RUN_ATOMIC_BENCHMARKS(AddStrideBase);
|
||||
|
||||
RUN_ATOMIC_BENCHMARKS(CASSeq);
|
||||
RUN_ATOMIC_BENCHMARKS(CASSeqBase);
|
||||
RUN_ATOMIC_BENCHMARKS(CASStride);
|
||||
RUN_ATOMIC_BENCHMARKS(CASStrideBase);
|
||||
}
|
||||
};
|
||||
}
|
||||
} // end namespace vtkm::benchmarking
|
||||
|
||||
int main(int, char* [])
|
||||
{
|
||||
using Device = VTKM_DEFAULT_DEVICE_ADAPTER_TAG;
|
||||
auto tracker = vtkm::cont::GetGlobalRuntimeDeviceTracker();
|
||||
tracker.ForceDevice(Device{});
|
||||
|
||||
try
|
||||
{
|
||||
vtkm::benchmarking::BenchmarkAtomicArray<Device>::Run();
|
||||
}
|
||||
catch (std::exception& e)
|
||||
{
|
||||
std::cerr << "Benchmark encountered an exception: " << e.what() << "\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
@ -60,6 +60,7 @@ endfunction()
|
||||
|
||||
set(benchmarks
|
||||
BenchmarkArrayTransfer
|
||||
BenchmarkAtomicArray
|
||||
BenchmarkCopySpeeds
|
||||
BenchmarkDeviceAdapter
|
||||
BenchmarkFieldAlgorithms
|
||||
|
Loading…
Reference in New Issue
Block a user