254 lines
9.0 KiB
C++
254 lines
9.0 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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#include <TestStdAlgorithmsCommon.hpp>
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namespace Test {
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namespace stdalgos {
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namespace TeamExclusiveScan {
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namespace KE = Kokkos::Experimental;
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template <class ValueType>
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struct PlusFunctor {
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KOKKOS_INLINE_FUNCTION constexpr ValueType operator()(
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const ValueType& lhs, const ValueType& rhs) const {
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return lhs + rhs;
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}
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};
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template <class SourceViewType, class DestViewType, class DistancesViewType,
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class IntraTeamSentinelView, class InitValuesViewType,
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class BinaryOpType>
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struct TestFunctorA {
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SourceViewType m_sourceView;
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DestViewType m_destView;
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DistancesViewType m_distancesView;
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IntraTeamSentinelView m_intraTeamSentinelView;
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InitValuesViewType m_initValuesView;
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BinaryOpType m_binaryOp;
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int m_apiPick;
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TestFunctorA(const SourceViewType sourceView, const DestViewType destView,
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const DistancesViewType distancesView,
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const IntraTeamSentinelView intraTeamSentinelView,
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const InitValuesViewType initValuesView, BinaryOpType binaryOp,
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int apiPick)
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: m_sourceView(sourceView),
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m_destView(destView),
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m_distancesView(distancesView),
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m_intraTeamSentinelView(intraTeamSentinelView),
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m_initValuesView(initValuesView),
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m_binaryOp(binaryOp),
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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 rowIndex = member.league_rank();
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auto rowViewSrc = Kokkos::subview(m_sourceView, rowIndex, Kokkos::ALL());
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auto rowViewDest = Kokkos::subview(m_destView, rowIndex, Kokkos::ALL());
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const auto initVal = m_initValuesView(rowIndex);
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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::exclusive_scan(member, KE::cbegin(rowViewSrc),
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KE::cend(rowViewSrc),
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KE::begin(rowViewDest), initVal);
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resultDist = KE::distance(KE::begin(rowViewDest), it);
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Kokkos::single(Kokkos::PerTeam(member),
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[=, *this] { m_distancesView(rowIndex) = resultDist; });
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break;
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}
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case 1: {
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auto it = KE::exclusive_scan(member, rowViewSrc, rowViewDest, initVal);
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resultDist = KE::distance(KE::begin(rowViewDest), it);
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Kokkos::single(Kokkos::PerTeam(member),
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[=, *this] { m_distancesView(rowIndex) = resultDist; });
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break;
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}
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#if not defined KOKKOS_ENABLE_OPENMPTARGET
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case 2: {
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auto it = KE::exclusive_scan(
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member, KE::cbegin(rowViewSrc), KE::cend(rowViewSrc),
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KE::begin(rowViewDest), initVal, m_binaryOp);
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resultDist = KE::distance(KE::begin(rowViewDest), it);
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Kokkos::single(Kokkos::PerTeam(member),
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[=, *this] { m_distancesView(rowIndex) = resultDist; });
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break;
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}
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case 3: {
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auto it = KE::exclusive_scan(member, rowViewSrc, rowViewDest, initVal,
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m_binaryOp);
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resultDist = KE::distance(KE::begin(rowViewDest), it);
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Kokkos::single(Kokkos::PerTeam(member),
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[=, *this] { m_distancesView(rowIndex) = resultDist; });
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break;
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}
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#endif
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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(rowIndex));
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Kokkos::single(Kokkos::PerTeam(member), [=, *this]() {
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m_intraTeamSentinelView(rowIndex) = 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(std::size_t numTeams, 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 exclusive_scan
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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 [sourceView, sourceViewBeforeOp_h] = create_random_view_and_host_clone(
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LayoutTag{}, numTeams, numCols, bounds, "sourceView");
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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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// create the destination view
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Kokkos::View<ValueType**> destView("destView", numTeams, numCols);
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// exclusive_scan 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 beginning
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// of the interval that team operates on and then we check that these
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// 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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PlusFunctor<ValueType> binaryOp;
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// Create view of reduce init values to be used by test cases
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Kokkos::View<ValueType*, Kokkos::DefaultHostExecutionSpace> initValuesView_h(
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"initValuesView_h", numTeams);
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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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Kokkos::fill_random(initValuesView_h, pool, lowerBound, upperBound);
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// use CTAD for functor
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auto initValuesView =
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Kokkos::create_mirror_view_and_copy(space_t(), initValuesView_h);
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TestFunctorA fnc(sourceView, destView, distancesView, intraTeamSentinelView,
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initValuesView, binaryOp, 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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Kokkos::View<ValueType**, Kokkos::HostSpace> stdDestView("stdDestView",
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numTeams, numCols);
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for (std::size_t i = 0; i < sourceView.extent(0); ++i) {
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auto rowFrom = Kokkos::subview(sourceViewBeforeOp_h, i, Kokkos::ALL());
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auto rowDest = Kokkos::subview(stdDestView, i, Kokkos::ALL());
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auto initValue = initValuesView_h(i);
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ASSERT_TRUE(intraTeamSentinelView_h(i));
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// libstdc++ as provided by GCC 8 does not have exclusive_scan and
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// for GCC 9.1, 9.2 fails to compile for missing overload not accepting policy
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#if defined(_GLIBCXX_RELEASE) && (_GLIBCXX_RELEASE <= 9)
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#define exclusive_scan testing_exclusive_scan
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#else
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#define exclusive_scan std::exclusive_scan
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#endif
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switch (apiId) {
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case 0:
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case 1: {
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auto it = exclusive_scan(KE::cbegin(rowFrom), KE::cend(rowFrom),
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KE::begin(rowDest), initValue);
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const std::size_t stdDistance = KE::distance(KE::begin(rowDest), it);
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ASSERT_EQ(stdDistance, distancesView_h(i));
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break;
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}
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#if not defined KOKKOS_ENABLE_OPENMPTARGET
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case 2:
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case 3: {
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auto it = exclusive_scan(KE::cbegin(rowFrom), KE::cend(rowFrom),
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KE::begin(rowDest), initValue, binaryOp);
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const std::size_t stdDistance = KE::distance(KE::begin(rowDest), it);
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ASSERT_EQ(stdDistance, distancesView_h(i));
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break;
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}
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#endif
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}
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#undef exclusive_scan
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}
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auto dataViewAfterOp_h = create_host_space_copy(destView);
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expect_equal_host_views(stdDestView, dataViewAfterOp_h);
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}
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template <class LayoutTag, class ValueType>
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void run_all_scenarios() {
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for (int numTeams : teamSizesToTest) {
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for (const auto& numCols : {0, 1, 2, 13, 101, 1444, 8153}) {
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#if not defined KOKKOS_ENABLE_OPENMPTARGET
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for (int apiId : {0, 1, 2, 3}) {
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#else
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for (int apiId : {0, 1}) {
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#endif
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test_A<LayoutTag, ValueType>(numTeams, numCols, apiId);
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}
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}
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}
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}
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TEST(std_algorithms_exclusive_scan_team_test, test) {
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run_all_scenarios<DynamicTag, double>();
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run_all_scenarios<StridedTwoRowsTag, int>();
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run_all_scenarios<StridedThreeRowsTag, unsigned>();
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}
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} // namespace TeamExclusiveScan
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} // namespace stdalgos
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} // namespace Test
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