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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 TeamCount {
namespace KE = Kokkos::Experimental;
template <class ViewType, class ValuesViewType, class CountsViewType,
class IntraTeamSentinelView>
struct TestFunctorA {
ViewType m_view;
ValuesViewType m_valuesView;
CountsViewType m_countsView;
IntraTeamSentinelView m_intraTeamSentinelView;
int m_apiPick;
TestFunctorA(const ViewType view, const ValuesViewType valuesView,
const CountsViewType countsView,
const IntraTeamSentinelView intraTeamSentinelView, int apiPick)
: m_view(view),
m_valuesView(valuesView),
m_countsView(countsView),
m_intraTeamSentinelView(intraTeamSentinelView),
m_apiPick(apiPick) {}
template <class MemberType>
KOKKOS_INLINE_FUNCTION void operator()(const MemberType& member) const {
const auto rowIndex = member.league_rank();
const auto value = m_valuesView(rowIndex);
auto rowView = Kokkos::subview(m_view, rowIndex, Kokkos::ALL());
std::size_t result = 0;
switch (m_apiPick) {
case 0: {
result =
KE::count(member, KE::cbegin(rowView), KE::cend(rowView), value);
Kokkos::single(Kokkos::PerTeam(member),
[=, *this]() { m_countsView(rowIndex) = result; });
break;
}
case 1: {
result = KE::count(member, rowView, value);
Kokkos::single(Kokkos::PerTeam(member),
[=, *this]() { m_countsView(rowIndex) = result; });
break;
}
}
// 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_countsView(rowIndex));
Kokkos::single(Kokkos::PerTeam(member), [=, *this]() {
m_intraTeamSentinelView(rowIndex) = intraTeamCheck;
});
}
};
template <class LayoutTag, class ValueType>
void test_A(const bool searched_value_exist, std::size_t numTeams,
std::size_t numCols, int apiId) {
/* description:
use a rank-2 view randomly filled with values,
and run a team-level count
*/
// -----------------------------------------------
// 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.
// Boundaries choosen so that every drawn number is at least once in the given
// row
const ValueType lowerBound = static_cast<ValueType>(numCols) / 4;
const ValueType upperBound = 1 + static_cast<ValueType>(numCols) * 3 / 4;
const auto bounds = make_bounds(lowerBound, upperBound);
auto [dataView, dataViewBeforeOp_h] = create_random_view_and_host_clone(
LayoutTag{}, numTeams, numCols, bounds, "dataView");
// If searched_value_exist == true, we want to ensure that count result is >
// 0, so we randomly pick a value to look for from a given row.
//
// If searched_value_exist == false, we want to ensure that count returns 0,
// so we pick a value that's outside of view boundaries.
Kokkos::View<ValueType*> valuesView("valuesView", numTeams);
auto valuesView_h = create_mirror_view(Kokkos::HostSpace(), valuesView);
using rand_pool =
Kokkos::Random_XorShift64_Pool<Kokkos::DefaultHostExecutionSpace>;
rand_pool pool(static_cast<uint64_t>(lowerBound) * upperBound);
if (searched_value_exist) {
Kokkos::View<std::size_t*, Kokkos::DefaultHostExecutionSpace> randomIndices(
"randomIndices", numTeams);
Kokkos::fill_random(randomIndices, pool, 0, numCols);
for (std::size_t i = 0; i < numTeams; ++i) {
const std::size_t j = randomIndices(i);
valuesView_h(i) = dataViewBeforeOp_h(i, j);
}
} else {
Kokkos::fill_random(valuesView_h, pool, upperBound, upperBound * 2);
}
Kokkos::deep_copy(valuesView, valuesView_h);
// -----------------------------------------------
// 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 of its count
// call, and then we check that these match what we expect
Kokkos::View<std::size_t*> countsView("countsView", 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, valuesView, countsView, intraTeamSentinelView,
apiId);
Kokkos::parallel_for(policy, fnc);
// -----------------------------------------------
// check
// -----------------------------------------------
auto countsView_h = create_host_space_copy(countsView);
auto intraTeamSentinelView_h = create_host_space_copy(intraTeamSentinelView);
if (searched_value_exist) {
for (std::size_t i = 0; i < dataView.extent(0); ++i) {
auto rowFrom = Kokkos::subview(dataViewBeforeOp_h, i, Kokkos::ALL());
const auto rowFromBegin = KE::cbegin(rowFrom);
const auto rowFromEnd = KE::cend(rowFrom);
const auto val = valuesView_h(i);
const std::size_t result = std::count(rowFromBegin, rowFromEnd, val);
ASSERT_EQ(result, countsView_h(i));
ASSERT_TRUE(intraTeamSentinelView_h(i));
}
} else {
for (std::size_t i = 0; i < countsView.extent(0); ++i) {
constexpr std::size_t zero = 0;
ASSERT_EQ(countsView_h(i), zero);
ASSERT_TRUE(intraTeamSentinelView_h(i));
}
}
}
template <class LayoutTag, class ValueType>
void run_all_scenarios(const bool searchedValueExist) {
for (int numTeams : teamSizesToTest) {
for (const auto& numCols : {1, 2, 13, 101, 1444, 8153}) {
for (int apiId : {0, 1}) {
test_A<LayoutTag, ValueType>(searchedValueExist, numTeams, numCols,
apiId);
}
}
}
}
TEST(std_algorithms_count_team_test, count_returns_nonzero) {
constexpr bool searchedValueExist = true;
run_all_scenarios<DynamicTag, double>(searchedValueExist);
run_all_scenarios<StridedTwoRowsTag, int>(searchedValueExist);
run_all_scenarios<StridedThreeRowsTag, unsigned>(searchedValueExist);
}
TEST(std_algorithms_count_team_test, count_returns_zero) {
constexpr bool searchedValueExist = false;
run_all_scenarios<DynamicTag, double>(searchedValueExist);
run_all_scenarios<StridedTwoRowsTag, int>(searchedValueExist);
run_all_scenarios<StridedThreeRowsTag, unsigned>(searchedValueExist);
}
} // namespace TeamCount
} // namespace stdalgos
} // namespace Test
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