230 lines
8.5 KiB
C++
230 lines
8.5 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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namespace Test {
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namespace stdalgos {
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namespace TeamFindIf {
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namespace KE = Kokkos::Experimental;
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template <class ValueType>
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struct GreaterEqualFunctor {
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ValueType m_val;
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KOKKOS_INLINE_FUNCTION
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GreaterEqualFunctor(ValueType val) : m_val(val) {}
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KOKKOS_INLINE_FUNCTION
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bool operator()(ValueType val) const { return (val >= m_val); }
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};
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template <class DataViewType, class GreaterThanValuesViewType,
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class DistancesViewType, class IntraTeamSentinelView>
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struct TestFunctorA {
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DataViewType m_dataView;
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GreaterThanValuesViewType m_greaterThanValuesView;
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DistancesViewType m_distancesView;
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IntraTeamSentinelView m_intraTeamSentinelView;
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int m_apiPick;
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TestFunctorA(const DataViewType dataView,
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const GreaterThanValuesViewType greaterThanValuesView,
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const DistancesViewType distancesView,
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const IntraTeamSentinelView intraTeamSentinelView, int apiPick)
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: m_dataView(dataView),
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m_greaterThanValuesView(greaterThanValuesView),
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m_distancesView(distancesView),
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m_intraTeamSentinelView(intraTeamSentinelView),
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m_apiPick(apiPick) {}
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template <class MemberType>
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KOKKOS_INLINE_FUNCTION void operator()(const MemberType& member) const {
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const auto myRowIndex = member.league_rank();
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auto myRowViewFrom = Kokkos::subview(m_dataView, myRowIndex, Kokkos::ALL());
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const auto val = m_greaterThanValuesView(myRowIndex);
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GreaterEqualFunctor unaryPred{val};
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ptrdiff_t resultDist = 0;
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switch (m_apiPick) {
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case 0: {
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auto it = KE::find_if(member, KE::cbegin(myRowViewFrom),
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KE::cend(myRowViewFrom), unaryPred);
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resultDist = KE::distance(KE::cbegin(myRowViewFrom), it);
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Kokkos::single(Kokkos::PerTeam(member), [=, *this]() {
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m_distancesView(myRowIndex) = resultDist;
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});
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break;
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}
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case 1: {
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auto it = KE::find_if(member, myRowViewFrom, unaryPred);
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resultDist = KE::distance(KE::begin(myRowViewFrom), it);
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Kokkos::single(Kokkos::PerTeam(member), [=, *this]() {
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m_distancesView(myRowIndex) = resultDist;
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});
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break;
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}
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}
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// store result of checking if all members have their local
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// values matching the one stored in m_distancesView
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member.team_barrier();
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const bool intraTeamCheck = team_members_have_matching_result(
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member, resultDist, m_distancesView(myRowIndex));
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Kokkos::single(Kokkos::PerTeam(member), [=, *this]() {
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m_intraTeamSentinelView(myRowIndex) = intraTeamCheck;
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});
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}
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};
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template <class LayoutTag, class ValueType>
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void test_A(const bool predicatesReturnTrue, std::size_t numTeams,
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std::size_t numCols, int apiId) {
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/* description:
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use a rank-2 view randomly filled with values,
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and run a team-level find_if
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*/
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// -----------------------------------------------
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// prepare data
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// -----------------------------------------------
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// create a view in the memory space associated with default exespace
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// with as many rows as the number of teams and fill it with random
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// values from an arbitrary range.
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constexpr ValueType lowerBound = 5;
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constexpr ValueType upperBound = 523;
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const auto bounds = make_bounds(lowerBound, upperBound);
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auto [dataView, dataViewBeforeOp_h] = create_random_view_and_host_clone(
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LayoutTag{}, numTeams, numCols, bounds, "dataView");
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// -----------------------------------------------
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// launch kokkos kernel
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// -----------------------------------------------
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using space_t = Kokkos::DefaultExecutionSpace;
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Kokkos::TeamPolicy<space_t> policy(numTeams, Kokkos::AUTO());
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// find_if returns an iterator so to verify that it is correct
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// each team stores the distance of the returned iterator from the
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// beginning of the interval that team operates on and then we check
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// that these distances match the std result
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Kokkos::View<std::size_t*> distancesView("distancesView", numTeams);
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// sentinel to check if all members of the team compute the same result
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Kokkos::View<bool*> intraTeamSentinelView("intraTeamSameResult", numTeams);
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// If predicatesReturnTrue == true, we want to ensure that eventually, for
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// some value from each of dataView's row, predicate GreaterEqualFunctor will
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// return true. To do that, for each numTeams, a random j index from a range
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// [0, numCols) is used to obtain a value from dataView, and later that value
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// is used for creating concrete GreaterEqualFunctor predicate.
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//
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// If predicatesReturnTrue == false we want to ensure the opposite, so every
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// value is randomly picked from range [upperBound, upperBound*2).
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Kokkos::View<ValueType*> greaterEqualValuesView("greaterEqualValuesView",
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numTeams);
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auto greaterEqualValuesView_h =
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create_mirror_view(Kokkos::HostSpace(), greaterEqualValuesView);
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using rand_pool =
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Kokkos::Random_XorShift64_Pool<Kokkos::DefaultHostExecutionSpace>;
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rand_pool pool(lowerBound * upperBound);
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if (predicatesReturnTrue) {
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Kokkos::View<std::size_t*, Kokkos::DefaultHostExecutionSpace> randomIndices(
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"randomIndices", numTeams);
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Kokkos::fill_random(randomIndices, pool, 0, numCols);
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for (std::size_t i = 0; i < numTeams; ++i) {
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const std::size_t j = randomIndices(i);
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greaterEqualValuesView_h(i) = dataViewBeforeOp_h(i, j);
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}
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} else {
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Kokkos::fill_random(greaterEqualValuesView_h, pool, upperBound,
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upperBound * 2);
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}
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Kokkos::deep_copy(greaterEqualValuesView, greaterEqualValuesView_h);
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// use CTAD for functor
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TestFunctorA fnc(dataView, greaterEqualValuesView, distancesView,
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intraTeamSentinelView, apiId);
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Kokkos::parallel_for(policy, fnc);
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// -----------------------------------------------
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// run cpp-std kernel and check
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// -----------------------------------------------
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auto distancesView_h = create_host_space_copy(distancesView);
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auto intraTeamSentinelView_h = create_host_space_copy(intraTeamSentinelView);
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for (std::size_t i = 0; i < dataView.extent(0); ++i) {
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auto rowFrom = Kokkos::subview(dataViewBeforeOp_h, i, Kokkos::ALL());
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const auto rowFromBegin = KE::cbegin(rowFrom);
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const auto rowFromEnd = KE::cend(rowFrom);
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const auto val = greaterEqualValuesView_h(i);
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const GreaterEqualFunctor unaryPred{val};
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auto it = std::find_if(rowFromBegin, rowFromEnd, unaryPred);
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const std::size_t stdDistance = KE::distance(rowFromBegin, it);
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const std::size_t beginEndDistance = KE::distance(rowFromBegin, rowFromEnd);
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if (predicatesReturnTrue) {
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EXPECT_LT(stdDistance, beginEndDistance);
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} else {
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ASSERT_EQ(stdDistance, beginEndDistance);
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}
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ASSERT_EQ(stdDistance, distancesView_h(i));
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ASSERT_TRUE(intraTeamSentinelView_h(i));
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}
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}
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template <class LayoutTag, class ValueType>
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void run_all_scenarios(const bool predicatesReturnTrue) {
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for (int numTeams : teamSizesToTest) {
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for (const auto& numCols : {1, 2, 13, 101, 1444, 8153}) {
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for (int apiId : {0, 1}) {
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test_A<LayoutTag, ValueType>(predicatesReturnTrue, numTeams, numCols,
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apiId);
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}
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}
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}
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}
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TEST(std_algorithms_find_if_team_test, predicates_return_true) {
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constexpr bool predicatesReturnTrue = true;
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run_all_scenarios<DynamicTag, double>(predicatesReturnTrue);
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run_all_scenarios<StridedTwoRowsTag, int>(predicatesReturnTrue);
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run_all_scenarios<StridedThreeRowsTag, unsigned>(predicatesReturnTrue);
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}
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TEST(std_algorithms_find_if_team_test, predicates_return_false) {
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constexpr bool predicatesReturnTrue = false;
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run_all_scenarios<DynamicTag, double>(predicatesReturnTrue);
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run_all_scenarios<StridedTwoRowsTag, int>(predicatesReturnTrue);
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run_all_scenarios<StridedThreeRowsTag, unsigned>(predicatesReturnTrue);
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}
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} // namespace TeamFindIf
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} // namespace stdalgos
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} // namespace Test
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