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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>
namespace Test {
namespace stdalgos {
namespace TeamIsSorted {
namespace KE = Kokkos::Experimental;
template <class ViewType, class ReturnViewType, class IntraTeamSentinelView>
struct TestFunctorA {
ViewType m_view;
ReturnViewType m_returnsView;
IntraTeamSentinelView m_intraTeamSentinelView;
int m_apiPick;
TestFunctorA(const ViewType view, const ReturnViewType returnsView,
const IntraTeamSentinelView intraTeamSentinelView, int apiPick)
: m_view(view),
m_returnsView(returnsView),
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 myRowView = Kokkos::subview(m_view, myRowIndex, Kokkos::ALL());
bool result = false;
if (m_apiPick == 0) {
result =
KE::is_sorted(member, KE::cbegin(myRowView), KE::cend(myRowView));
Kokkos::single(Kokkos::PerTeam(member),
[=, *this]() { m_returnsView(myRowIndex) = result; });
} else if (m_apiPick == 1) {
result = KE::is_sorted(member, myRowView);
Kokkos::single(Kokkos::PerTeam(member),
[=, *this]() { m_returnsView(myRowIndex) = result; });
}
#ifndef KOKKOS_ENABLE_OPENMPTARGET
else if (m_apiPick == 2) {
using value_type = typename ViewType::value_type;
result = KE::is_sorted(member, KE::cbegin(myRowView), KE::cend(myRowView),
CustomLessThanComparator<value_type>{});
Kokkos::single(Kokkos::PerTeam(member),
[=, *this]() { m_returnsView(myRowIndex) = result; });
} else if (m_apiPick == 3) {
using value_type = typename ViewType::value_type;
result = KE::is_sorted(member, myRowView,
CustomLessThanComparator<value_type>{});
Kokkos::single(Kokkos::PerTeam(member),
[=, *this]() { m_returnsView(myRowIndex) = result; });
}
#endif
// 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, result, m_returnsView(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,
bool makeDataSortedOnPurpose) {
/* description:
use a rank-2 view randomly filled with values,
and run a team-level is_sorted
*/
// -----------------------------------------------
// prepare data
// -----------------------------------------------
// construct in memory space associated with default exespace
auto dataView =
create_view<ValueType>(LayoutTag{}, numTeams, numCols, "dataView");
// dataView might not deep copyable (e.g. strided layout) so to
// randomize it, we make a new view that is for sure deep copyable,
// modify it on the host, deep copy to device and then launch
// a kernel to copy to dataView
auto dataView_dc =
create_deep_copyable_compatible_view_with_same_extent(dataView);
auto dataView_dc_h = create_mirror_view(Kokkos::HostSpace(), dataView_dc);
if (makeDataSortedOnPurpose) {
for (std::size_t i = 0; i < dataView_dc_h.extent(0); ++i) {
for (std::size_t j = 0; j < dataView_dc_h.extent(1); ++j) {
dataView_dc_h(i, j) = ValueType(j);
}
}
} else {
// randomly fill the view
using rand_pool =
Kokkos::Random_XorShift64_Pool<Kokkos::DefaultHostExecutionSpace>;
rand_pool pool(45234977);
Kokkos::fill_random(dataView_dc_h, pool, ValueType{5}, ValueType{1545});
}
// copy to dataView_dc and then to dataView
Kokkos::deep_copy(dataView_dc, dataView_dc_h);
// use CTAD
CopyFunctorRank2 F1(dataView_dc, dataView);
Kokkos::parallel_for("copy", dataView.extent(0) * dataView.extent(1), F1);
// -----------------------------------------------
// launch kokkos kernel
// -----------------------------------------------
using space_t = Kokkos::DefaultExecutionSpace;
Kokkos::TeamPolicy<space_t> policy(numTeams, Kokkos::AUTO());
// to verify that things work, each team stores the result
// and then we check that these match what we expect
Kokkos::View<bool*> returnView("returnView", 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(dataView, returnView, intraTeamSentinelView, apiId);
Kokkos::parallel_for(policy, fnc);
// -----------------------------------------------
// check
// -----------------------------------------------
auto returnView_h = create_host_space_copy(returnView);
auto intraTeamSentinelView_h = create_host_space_copy(intraTeamSentinelView);
for (std::size_t i = 0; i < dataView_dc_h.extent(0); ++i) {
auto myRow = Kokkos::subview(dataView_dc_h, i, Kokkos::ALL());
bool stdResult;
if (apiId <= 1) {
stdResult = std::is_sorted(KE::cbegin(myRow), KE::cend(myRow));
} else {
stdResult = std::is_sorted(KE::cbegin(myRow), KE::cend(myRow),
CustomLessThanComparator<ValueType>{});
}
// our result must match std
EXPECT_TRUE(stdResult == returnView_h(i));
// check also since we know in advance when data is really sorted.
// note that we have to be careful because when we have only
// 0, 1 columns, then the data is sorted by definition
// and when we have 2 columns it is very likely it is sorted
// so only do the following check for large enough cols count
if (numCols <= 1) {
EXPECT_TRUE(stdResult == true);
} else if (numCols > 10) {
EXPECT_TRUE(stdResult == makeDataSortedOnPurpose);
}
ASSERT_TRUE(intraTeamSentinelView_h(i));
}
// dataView should remain unchanged
auto dataViewAfterOp_h = create_host_space_copy(dataView);
expect_equal_host_views(dataView_dc_h, dataViewAfterOp_h);
}
template <class LayoutTag, class ValueType>
void run_all_scenarios(bool makeDataSortedOnPurpose) {
for (int numTeams : teamSizesToTest) {
for (const auto& numCols : {0, 1, 2, 13, 101, 1444, 5153}) {
#ifndef KOKKOS_ENABLE_OPENMPTARGET
for (int apiId : {0, 1, 2, 3}) {
#else
for (int apiId : {0, 1}) {
#endif
test_A<LayoutTag, ValueType>(numTeams, numCols, apiId,
makeDataSortedOnPurpose);
}
}
}
}
TEST(std_algorithms_is_sorted_team_test,
test_data_almost_certainly_not_sorted) {
run_all_scenarios<DynamicTag, double>(false);
run_all_scenarios<StridedTwoRowsTag, double>(false);
run_all_scenarios<StridedThreeRowsTag, unsigned>(false);
}
TEST(std_algorithms_is_sorted_team_test, test_data_certainly_sorted) {
run_all_scenarios<DynamicTag, double>(true);
run_all_scenarios<StridedTwoRowsTag, double>(true);
run_all_scenarios<StridedThreeRowsTag, unsigned>(true);
}
} // namespace TeamIsSorted
} // namespace stdalgos
} // namespace Test
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