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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 TeamRotateCopy {
namespace KE = Kokkos::Experimental;
template <class SourceViewType, class DestViewType, class DistancesViewType,
class IntraTeamSentinelView>
struct TestFunctorA {
SourceViewType m_sourceView;
DestViewType m_destView;
DistancesViewType m_distancesView;
IntraTeamSentinelView m_intraTeamSentinelView;
std::size_t m_pivotShift;
int m_apiPick;
TestFunctorA(const SourceViewType sourceView, const DestViewType destView,
const DistancesViewType distancesView,
const IntraTeamSentinelView intraTeamSentinelView,
std::size_t pivotShift, int apiPick)
: m_sourceView(sourceView),
m_destView(destView),
m_distancesView(distancesView),
m_intraTeamSentinelView(intraTeamSentinelView),
m_pivotShift(pivotShift),
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;
if (m_apiPick == 0) {
auto pivot = KE::cbegin(myRowViewFrom) + m_pivotShift;
auto it =
KE::rotate_copy(member, KE::cbegin(myRowViewFrom), pivot,
KE::cend(myRowViewFrom), KE::begin(myRowViewDest));
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::rotate_copy(member, myRowViewFrom, m_pivotShift, myRowViewDest);
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, std::size_t pivotShift,
int apiId) {
/* description:
randomly fill a rank-2 view and for a given pivot,
do a team-level KE::rotateCopy
*/
// -----------------------------------------------
// prepare data
// -----------------------------------------------
// create a view in the memory space associated with default exespace
// with as many rows as the number of teams and fill it with random
// values from an arbitrary range
auto [sourceView, cloneOfSourceViewBeforeOp_h] =
create_random_view_and_host_clone(
LayoutTag{}, numTeams, numCols,
Kokkos::pair<ValueType, ValueType>{11, 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 expectation
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, distancesView, intraTeamSentinelView,
pivotShift, apiId);
Kokkos::parallel_for(policy, fnc);
// -----------------------------------------------
// run std algo and check
// -----------------------------------------------
Kokkos::View<ValueType**, Kokkos::HostSpace> stdDestView("stdDestView",
numTeams, numCols);
auto distancesView_h = create_host_space_copy(distancesView);
auto intraTeamSentinelView_h = create_host_space_copy(intraTeamSentinelView);
for (std::size_t i = 0; i < cloneOfSourceViewBeforeOp_h.extent(0); ++i) {
auto myRowFrom =
Kokkos::subview(cloneOfSourceViewBeforeOp_h, i, Kokkos::ALL());
auto myRowDest = Kokkos::subview(stdDestView, i, Kokkos::ALL());
auto pivot = KE::cbegin(myRowFrom) + pivotShift;
auto it = std::rotate_copy(KE::cbegin(myRowFrom), pivot,
KE::cend(myRowFrom), KE::begin(myRowDest));
const std::size_t stdDistance = KE::distance(KE::begin(myRowDest), it);
ASSERT_EQ(stdDistance, distancesView_h(i));
ASSERT_TRUE(intraTeamSentinelView_h(i));
}
auto destViewAfterOp_h = create_host_space_copy(destView);
expect_equal_host_views(stdDestView, destViewAfterOp_h);
}
template <class ValueType>
struct UnifDist;
template <>
struct UnifDist<int> {
using dist_type = std::uniform_int_distribution<int>;
std::mt19937 m_gen;
dist_type m_dist;
UnifDist(int b, std::size_t seedIn) : m_dist(0, b) { m_gen.seed(seedIn); }
int operator()() { return m_dist(m_gen); }
};
template <class Tag, class ValueType>
void run_all_scenarios() {
for (int numTeams : teamSizesToTest) {
for (const auto& numCols : {0, 1, 2, 13, 101, 1153}) {
// given numTeams, numCols, randomly pick a few pivots to test
constexpr int numPivotsToTest = 5;
UnifDist<int> pivotsProducer(numCols, 3123377);
for (int k = 0; k < numPivotsToTest; ++k) {
const auto pivotIndex = pivotsProducer();
// test all apis
for (int apiId : {0, 1}) {
test_A<Tag, ValueType>(numTeams, numCols, pivotIndex, apiId);
}
}
}
}
}
TEST(std_algorithms_rotate_copy_team_test, test) {
run_all_scenarios<DynamicTag, double>();
run_all_scenarios<StridedTwoRowsTag, int>();
run_all_scenarios<StridedThreeRowsTag, int>();
}
} // namespace TeamRotateCopy
} // namespace stdalgos
} // namespace Test
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