402 lines
13 KiB
C++
402 lines
13 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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#include <TestStdAlgorithmsCommon.hpp>
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#include <utility>
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#include <iomanip>
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namespace Test {
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namespace stdalgos {
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namespace EScan {
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namespace KE = Kokkos::Experimental;
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template <class ValueType>
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struct UnifDist;
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template <>
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struct UnifDist<double> {
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using dist_type = std::uniform_real_distribution<double>;
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std::mt19937 m_gen;
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dist_type m_dist;
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UnifDist() : m_dist(0.05, 1.2) { m_gen.seed(1034343); }
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double operator()() { return m_dist(m_gen); }
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};
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template <>
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struct UnifDist<int> {
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using dist_type = std::uniform_int_distribution<int>;
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std::mt19937 m_gen;
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dist_type m_dist;
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UnifDist() : m_dist(1, 3) { m_gen.seed(1034343); }
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int operator()() { return m_dist(m_gen); }
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};
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template <>
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struct UnifDist<CustomValueType> {
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using dist_type = std::uniform_real_distribution<double>;
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std::mt19937 m_gen;
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dist_type m_dist;
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UnifDist() : m_dist(0.05, 1.2) { m_gen.seed(1034343); }
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CustomValueType operator()() { return m_dist(m_gen); }
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};
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template <class ViewType>
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void fill_view(ViewType dest_view, const std::string& name) {
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using value_type = typename ViewType::value_type;
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using exe_space = typename ViewType::execution_space;
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const std::size_t ext = dest_view.extent(0);
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using aux_view_t = Kokkos::View<value_type*, exe_space>;
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aux_view_t aux_view("aux_view", ext);
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auto v_h = create_mirror_view(Kokkos::HostSpace(), aux_view);
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UnifDist<value_type> randObj;
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if (name == "empty") {
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// no op
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}
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else if (name == "one-element") {
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v_h(0) = static_cast<value_type>(1);
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}
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else if (name == "two-elements-a") {
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v_h(0) = static_cast<value_type>(1);
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v_h(1) = static_cast<value_type>(2);
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}
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else if (name == "two-elements-b") {
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v_h(0) = static_cast<value_type>(2);
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v_h(1) = static_cast<value_type>(-1);
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}
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else if (name == "small-a") {
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for (std::size_t i = 0; i < ext; ++i) {
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v_h(i) = static_cast<value_type>(i + 1);
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}
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}
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else if (name == "small-b") {
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for (std::size_t i = 0; i < ext; ++i) {
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v_h(i) = randObj();
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}
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v_h(5) = static_cast<value_type>(-2);
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}
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else if (name == "medium" || name == "large") {
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for (std::size_t i = 0; i < ext; ++i) {
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v_h(i) = randObj();
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}
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}
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else {
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FAIL() << "invalid choice";
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}
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Kokkos::deep_copy(aux_view, v_h);
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CopyFunctor<aux_view_t, ViewType> F1(aux_view, dest_view);
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Kokkos::parallel_for("copy", dest_view.extent(0), F1);
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}
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// I had to write my own because std::exclusive_scan is ONLY found with
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// std=c++17
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template <class it1, class it2, class ValType, class BopType>
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void my_host_exclusive_scan(it1 first, it1 last, it2 dest, ValType init,
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BopType bop) {
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const auto num_elements = last - first;
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if (num_elements > 0) {
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while (first < last - 1) {
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*(dest++) = init;
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init = bop(*first++, init);
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}
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*dest = init;
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}
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}
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template <class ValueType>
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struct MultiplyFunctor {
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KOKKOS_INLINE_FUNCTION
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ValueType operator()(const ValueType& a, const ValueType& b) const {
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return (a * b);
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}
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};
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template <class ValueType>
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struct SumFunctor {
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KOKKOS_INLINE_FUNCTION
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ValueType operator()(const ValueType& a, const ValueType& b) const {
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return (a + b);
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}
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};
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struct VerifyData {
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template <class ViewType1, class ViewType2, class ValueType, class BinaryOp>
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void operator()(ViewType1 data_view, // contains data
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ViewType2 test_view, // the view to test
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ValueType init_value, BinaryOp bop) {
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//! always careful because views might not be deep copyable
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auto data_view_dc = create_deep_copyable_compatible_clone(data_view);
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auto data_view_h =
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create_mirror_view_and_copy(Kokkos::HostSpace(), data_view_dc);
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using gold_view_value_type = typename ViewType2::value_type;
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Kokkos::View<gold_view_value_type*, Kokkos::HostSpace> gold_h(
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"goldh", data_view.extent(0));
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my_host_exclusive_scan(KE::cbegin(data_view_h), KE::cend(data_view_h),
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KE::begin(gold_h), init_value, bop);
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auto test_view_dc = create_deep_copyable_compatible_clone(test_view);
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auto test_view_h =
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create_mirror_view_and_copy(Kokkos::HostSpace(), test_view_dc);
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if (test_view_h.extent(0) > 0) {
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for (std::size_t i = 0; i < test_view_h.extent(0); ++i) {
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if (std::is_same_v<gold_view_value_type, int>) {
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ASSERT_EQ(gold_h(i), test_view_h(i));
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} else {
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const auto error =
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std::abs(static_cast<double>(gold_h(i) - test_view_h(i)));
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ASSERT_LT(error, 1e-10) << i << " " << std::setprecision(15) << error
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<< static_cast<double>(test_view_h(i)) << " "
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<< static_cast<double>(gold_h(i));
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}
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}
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}
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}
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template <class ViewType1, class ViewType2, class ValueType>
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void operator()(ViewType1 data_view, // contains data
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ViewType2 test_view, // the view to test
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ValueType init_value) {
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(*this)(data_view, test_view, init_value, SumFunctor<ValueType>());
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}
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};
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std::string value_type_to_string(int) { return "int"; }
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std::string value_type_to_string(double) { return "double"; }
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template <class Tag, class ValueType, class InfoType, class... OpOrEmpty>
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void run_single_scenario(const InfoType& scenario_info, ValueType init_value,
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OpOrEmpty... empty_or_op) {
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const auto name = std::get<0>(scenario_info);
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const std::size_t view_ext = std::get<1>(scenario_info);
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auto view_dest = create_view<ValueType>(Tag{}, view_ext, "exclusive_scan");
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auto view_from = create_view<ValueType>(Tag{}, view_ext, "exclusive_scan");
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fill_view(view_from, name);
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// view_dest is filled with zeros before calling the algorithm everytime to
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// ensure the algorithm does something meaningful
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{
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fill_zero(view_dest);
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auto r = KE::exclusive_scan(exespace(), KE::cbegin(view_from),
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KE::cend(view_from), KE::begin(view_dest),
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init_value, empty_or_op...);
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ASSERT_EQ(r, KE::end(view_dest));
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VerifyData()(view_from, view_dest, init_value, empty_or_op...);
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}
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{
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fill_zero(view_dest);
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auto r = KE::exclusive_scan("label", exespace(), KE::cbegin(view_from),
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KE::cend(view_from), KE::begin(view_dest),
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init_value, empty_or_op...);
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ASSERT_EQ(r, KE::end(view_dest));
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VerifyData()(view_from, view_dest, init_value, empty_or_op...);
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}
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{
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fill_zero(view_dest);
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auto r = KE::exclusive_scan(exespace(), view_from, view_dest, init_value,
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empty_or_op...);
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ASSERT_EQ(r, KE::end(view_dest));
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VerifyData()(view_from, view_dest, init_value, empty_or_op...);
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}
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{
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fill_zero(view_dest);
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auto r = KE::exclusive_scan("label", exespace(), view_from, view_dest,
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init_value, empty_or_op...);
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ASSERT_EQ(r, KE::end(view_dest));
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VerifyData()(view_from, view_dest, init_value, empty_or_op...);
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}
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Kokkos::fence();
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}
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template <class Tag, class ValueType, class InfoType, class... OpOrEmpty>
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void run_single_scenario_inplace(const InfoType& scenario_info,
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ValueType init_value,
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OpOrEmpty... empty_or_op) {
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const auto name = std::get<0>(scenario_info);
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const std::size_t view_ext = std::get<1>(scenario_info);
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// since here we call the in-place operation, we need to use two views:
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// view1: filled according to what the scenario asks for and is not modified
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// view2: filled according to what the scenario asks for and used for the
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// in-place op Therefore, after the op is done, view2 should contain the
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// result of doing exclusive scan NOTE: view2 is filled below every time
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// because the algorithm acts in place
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auto view1 =
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create_view<ValueType>(Tag{}, view_ext, "exclusive_scan_inplace_view1");
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fill_view(view1, name);
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auto view2 =
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create_view<ValueType>(Tag{}, view_ext, "exclusive_scan_inplace_view2");
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{
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fill_view(view2, name);
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auto r = KE::exclusive_scan(exespace(), KE::cbegin(view2), KE::cend(view2),
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KE::begin(view2), init_value, empty_or_op...);
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ASSERT_EQ(r, KE::end(view2));
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VerifyData()(view1, view2, init_value, empty_or_op...);
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}
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{
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fill_view(view2, name);
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auto r = KE::exclusive_scan("label", exespace(), KE::cbegin(view2),
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KE::cend(view2), KE::begin(view2), init_value,
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empty_or_op...);
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ASSERT_EQ(r, KE::end(view2));
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VerifyData()(view1, view2, init_value, empty_or_op...);
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}
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{
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fill_view(view2, name);
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auto r = KE::exclusive_scan(exespace(), view2, view2, init_value,
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empty_or_op...);
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ASSERT_EQ(r, KE::end(view2));
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VerifyData()(view1, view2, init_value, empty_or_op...);
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}
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{
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fill_view(view2, name);
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auto r = KE::exclusive_scan("label", exespace(), view2, view2, init_value,
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empty_or_op...);
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ASSERT_EQ(r, KE::end(view2));
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VerifyData()(view1, view2, init_value, empty_or_op...);
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}
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Kokkos::fence();
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}
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template <class Tag, class ValueType>
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void run_exclusive_scan_all_scenarios() {
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const std::map<std::string, std::size_t> scenarios = {
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{"empty", 0}, {"one-element", 1}, {"two-elements-a", 2},
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{"two-elements-b", 2}, {"small-a", 9}, {"small-b", 13},
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{"medium", 1103}, {"large", 10513}};
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for (const auto& it : scenarios) {
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run_single_scenario<Tag, ValueType>(it, ValueType{0});
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run_single_scenario<Tag, ValueType>(it, ValueType{1});
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run_single_scenario<Tag, ValueType>(it, ValueType{-2});
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run_single_scenario<Tag, ValueType>(it, ValueType{3});
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run_single_scenario_inplace<Tag, ValueType>(it, ValueType{0});
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run_single_scenario_inplace<Tag, ValueType>(it, ValueType{-2});
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#if !defined KOKKOS_ENABLE_OPENMPTARGET
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// custom multiply op is only run for small views otherwise it overflows
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if (it.first == "small-a" || it.first == "small-b") {
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using custom_bop_t = MultiplyFunctor<ValueType>;
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run_single_scenario<Tag, ValueType>(it, ValueType{0}, custom_bop_t());
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run_single_scenario<Tag, ValueType>(it, ValueType{1}, custom_bop_t());
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run_single_scenario<Tag, ValueType>(it, ValueType{-2}, custom_bop_t());
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run_single_scenario<Tag, ValueType>(it, ValueType{3}, custom_bop_t());
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run_single_scenario_inplace<Tag, ValueType>(it, ValueType{0},
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custom_bop_t());
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run_single_scenario_inplace<Tag, ValueType>(it, ValueType{-2},
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custom_bop_t());
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}
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using custom_bop_t = SumFunctor<ValueType>;
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run_single_scenario<Tag, ValueType>(it, ValueType{0}, custom_bop_t());
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run_single_scenario<Tag, ValueType>(it, ValueType{1}, custom_bop_t());
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run_single_scenario<Tag, ValueType>(it, ValueType{-2}, custom_bop_t());
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run_single_scenario<Tag, ValueType>(it, ValueType{3}, custom_bop_t());
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run_single_scenario_inplace<Tag, ValueType>(it, ValueType{0},
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custom_bop_t());
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run_single_scenario_inplace<Tag, ValueType>(it, ValueType{-2},
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custom_bop_t());
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#endif
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}
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}
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TEST(std_algorithms_numeric_ops_test, exclusive_scan) {
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run_exclusive_scan_all_scenarios<DynamicTag, double>();
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run_exclusive_scan_all_scenarios<StridedThreeTag, double>();
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run_exclusive_scan_all_scenarios<DynamicTag, int>();
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run_exclusive_scan_all_scenarios<StridedThreeTag, int>();
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run_exclusive_scan_all_scenarios<DynamicTag, CustomValueType>();
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run_exclusive_scan_all_scenarios<StridedThreeTag, CustomValueType>();
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}
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TEST(std_algorithms_numeric_ops_test, exclusive_scan_functor) {
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int dummy = 0;
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using view_type = Kokkos::View<int*, exespace>;
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view_type dummy_view("dummy_view", 0);
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using functor_type =
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Kokkos::Experimental::Impl::ExclusiveScanDefaultFunctorWithValueWrapper<
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exespace, int, int, view_type, view_type>;
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functor_type functor(dummy, dummy_view, dummy_view);
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using value_type = functor_type::value_type;
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value_type value1;
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functor.init(value1);
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ASSERT_EQ(value1.val, 0);
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ASSERT_EQ(value1.is_initial, true);
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value_type value2;
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value2.val = 1;
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value2.is_initial = false;
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functor.join(value1, value2);
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ASSERT_EQ(value1.val, 1);
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ASSERT_EQ(value1.is_initial, false);
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functor.init(value1);
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functor.join(value2, value1);
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ASSERT_EQ(value2.val, 1);
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ASSERT_EQ(value2.is_initial, false);
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functor.init(value2);
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functor.join(value2, value1);
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ASSERT_EQ(value2.val, 0);
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ASSERT_EQ(value2.is_initial, true);
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value1.val = 1;
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value1.is_initial = false;
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value2.val = 2;
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value2.is_initial = false;
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functor.join(value2, value1);
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ASSERT_EQ(value2.val, 3);
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ASSERT_EQ(value2.is_initial, false);
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}
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} // namespace EScan
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} // namespace stdalgos
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} // namespace Test
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