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//@HEADER
// ************************************************************************
//
// Kokkos v. 4.0
// Copyright (2022) National Technology & Engineering
// Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
//
// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
// See https://kokkos.org/LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//@HEADER
#include <TestStdAlgorithmsCommon.hpp>
#include <algorithm>
namespace Test {
namespace stdalgos {
namespace TeamRemoveCopyIf {
namespace KE = Kokkos::Experimental;
template <class ValueType>
struct GreaterThanValueFunctor {
ValueType m_val;
KOKKOS_INLINE_FUNCTION
GreaterThanValueFunctor(ValueType val) : m_val(val) {}
KOKKOS_INLINE_FUNCTION
bool operator()(ValueType val) const { return (val > m_val); }
};
template <class SourceViewType, class DestViewType, class DistancesViewType,
class IntraTeamSentinelView, class ValueType>
struct TestFunctorA {
SourceViewType m_sourceView;
DestViewType m_destView;
ValueType m_threshold;
DistancesViewType m_distancesView;
IntraTeamSentinelView m_intraTeamSentinelView;
int m_apiPick;
TestFunctorA(const SourceViewType sourceView, const DestViewType destView,
ValueType threshold, const DistancesViewType distancesView,
const IntraTeamSentinelView intraTeamSentinelView, int apiPick)
: m_sourceView(sourceView),
m_destView(destView),
m_threshold(threshold),
m_distancesView(distancesView),
m_intraTeamSentinelView(intraTeamSentinelView),
m_apiPick(apiPick) {}
template <class MemberType>
KOKKOS_INLINE_FUNCTION void operator()(const MemberType& member) const {
const auto myRowIndex = member.league_rank();
auto myRowViewFrom =
Kokkos::subview(m_sourceView, myRowIndex, Kokkos::ALL());
auto myRowViewDest = Kokkos::subview(m_destView, myRowIndex, Kokkos::ALL());
ptrdiff_t resultDist = 0;
GreaterThanValueFunctor predicate(m_threshold);
if (m_apiPick == 0) {
auto it = KE::remove_copy_if(member, KE::cbegin(myRowViewFrom),
KE::cend(myRowViewFrom),
KE::begin(myRowViewDest), predicate);
resultDist = KE::distance(KE::begin(myRowViewDest), it);
Kokkos::single(Kokkos::PerTeam(member), [=, *this]() {
m_distancesView(myRowIndex) = resultDist;
});
} else if (m_apiPick == 1) {
auto it =
KE::remove_copy_if(member, myRowViewFrom, myRowViewDest, predicate);
resultDist = KE::distance(KE::begin(myRowViewDest), it);
Kokkos::single(Kokkos::PerTeam(member), [=, *this]() {
m_distancesView(myRowIndex) = resultDist;
});
}
// store result of checking if all members have their local
// values matching the one stored in m_distancesView
member.team_barrier();
const bool intraTeamCheck = team_members_have_matching_result(
member, resultDist, m_distancesView(myRowIndex));
Kokkos::single(Kokkos::PerTeam(member), [=, *this]() {
m_intraTeamSentinelView(myRowIndex) = intraTeamCheck;
});
}
};
template <class LayoutTag, class ValueType>
void test_A(std::size_t numTeams, std::size_t numCols, int apiId) {
/* description:
use a rank-2 view randomly filled,
and run a team-level remove_copy_if where the values copied
are those strictly greater than a threshold.
*/
const auto threshold = static_cast<ValueType>(531);
// -----------------------------------------------
// prepare data
// -----------------------------------------------
auto [sourceView, cloneOfSourceViewBeforeOp_h] =
create_random_view_and_host_clone(
LayoutTag{}, numTeams, numCols,
Kokkos::pair<ValueType, ValueType>{5, 523}, "sourceView");
// -----------------------------------------------
// launch kokkos kernel
// -----------------------------------------------
using space_t = Kokkos::DefaultExecutionSpace;
Kokkos::TeamPolicy<space_t> policy(numTeams, Kokkos::AUTO());
// create the destination view
Kokkos::View<ValueType**> destView("destView", numTeams, numCols);
// each team stores the distance of the returned iterator from the
// beginning of the interval that team operates on and then we check
// that these distances match the std result
Kokkos::View<std::size_t*> distancesView("distancesView", numTeams);
// sentinel to check if all members of the team compute the same result
Kokkos::View<bool*> intraTeamSentinelView("intraTeamSameResult", numTeams);
// use CTAD for functor
TestFunctorA fnc(sourceView, destView, threshold, distancesView,
intraTeamSentinelView, apiId);
Kokkos::parallel_for(policy, fnc);
// -----------------------------------------------
// check against std
// -----------------------------------------------
auto destViewAfterOp_h = create_host_space_copy(destView);
auto distancesView_h = create_host_space_copy(distancesView);
auto intraTeamSentinelView_h = create_host_space_copy(intraTeamSentinelView);
Kokkos::View<ValueType**, Kokkos::HostSpace> stdDestView("stdDestView",
numTeams, numCols);
GreaterThanValueFunctor<ValueType> predicate(threshold);
for (std::size_t i = 0; i < destViewAfterOp_h.extent(0); ++i) {
auto rowFrom =
Kokkos::subview(cloneOfSourceViewBeforeOp_h, i, Kokkos::ALL());
auto rowDest = Kokkos::subview(stdDestView, i, Kokkos::ALL());
auto stdIt = std::remove_copy_if(KE::cbegin(rowFrom), KE::cend(rowFrom),
KE::begin(rowDest), predicate);
const std::size_t stdDistance = KE::distance(KE::begin(rowDest), stdIt);
EXPECT_TRUE(distancesView_h(i) == stdDistance);
for (std::size_t j = 0; j < distancesView_h(i); ++j) {
EXPECT_TRUE(destViewAfterOp_h(i, j) == stdDestView(i, j));
}
ASSERT_TRUE(intraTeamSentinelView_h(i));
}
}
template <class LayoutTag, class ValueType>
void run_all_scenarios() {
for (int numTeams : teamSizesToTest) {
for (const auto& numCols : {0, 1, 2, 13, 101, 1444, 8113}) {
for (int apiId : {0, 1}) {
test_A<LayoutTag, ValueType>(numTeams, numCols, apiId);
}
}
}
}
TEST(std_algorithms_remove_copy_if_team_test, test) {
run_all_scenarios<DynamicTag, double>();
run_all_scenarios<StridedTwoRowsTag, int>();
run_all_scenarios<StridedThreeRowsTag, unsigned>();
}
} // namespace TeamRemoveCopyIf
} // namespace stdalgos
} // namespace Test
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