90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
//@HEADER
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// ************************************************************************
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//
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// Kokkos v. 4.0
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// Copyright (2022) National Technology & Engineering
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// Solutions of Sandia, LLC (NTESS).
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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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// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
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// See https://kokkos.org/LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//@HEADER
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#ifndef KOKKOS_TEST_SCATTER_VIEW_HPP
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#define KOKKOS_TEST_SCATTER_VIEW_HPP
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#include <Kokkos_ScatterView.hpp>
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#include <Kokkos_Timer.hpp>
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namespace Perf {
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template <typename ExecSpace, typename Layout, typename Duplication,
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typename Contribution>
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void test_scatter_view(int m, int n) {
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Kokkos::View<double* [3], Layout, ExecSpace> original_view("original_view",
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n);
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{
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auto scatter_view = Kokkos::Experimental::create_scatter_view<
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Kokkos::Experimental::ScatterSum, Duplication, Contribution>(
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original_view);
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Kokkos::Experimental::UniqueToken<
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ExecSpace, Kokkos::Experimental::UniqueTokenScope::Global>
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unique_token{ExecSpace()};
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// auto internal_view = scatter_view.internal_view;
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auto policy = Kokkos::RangePolicy<ExecSpace, int>(0, n);
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for (int foo = 0; foo < 5; ++foo) {
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{
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auto num_threads = unique_token.size();
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std::cout << "num_threads " << num_threads << '\n';
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Kokkos::View<double** [3], Layout, ExecSpace> hand_coded_duplicate_view(
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"hand_coded_duplicate", num_threads, n);
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auto f2 = KOKKOS_LAMBDA(int i) {
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auto thread_id = unique_token.acquire();
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for (int j = 0; j < 10; ++j) {
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auto k = (i + j) % n;
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hand_coded_duplicate_view(thread_id, k, 0) += 4.2;
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hand_coded_duplicate_view(thread_id, k, 1) += 2.0;
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hand_coded_duplicate_view(thread_id, k, 2) += 1.0;
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}
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};
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Kokkos::Timer timer;
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timer.reset();
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for (int k = 0; k < m; ++k) {
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Kokkos::parallel_for("hand_coded_duplicate_scatter_view_test", policy,
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f2);
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}
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Kokkos::fence();
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auto t = timer.seconds();
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std::cout << "hand-coded test took " << t << " seconds\n";
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}
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{
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auto f = KOKKOS_LAMBDA(int i) {
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auto scatter_access = scatter_view.access();
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for (int j = 0; j < 10; ++j) {
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auto k = (i + j) % n;
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scatter_access(k, 0) += 4.2;
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scatter_access(k, 1) += 2.0;
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scatter_access(k, 2) += 1.0;
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}
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};
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Kokkos::Timer timer;
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timer.reset();
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for (int k = 0; k < m; ++k) {
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Kokkos::parallel_for("scatter_view_test", policy, f);
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}
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Kokkos::fence();
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auto t = timer.seconds();
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std::cout << "test took " << t << " seconds\n";
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}
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}
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}
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}
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} // namespace Perf
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#endif
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