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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright Contributors to the Kokkos project
#include <cstdio>
#include <sstream>
#include <iostream>
#include <Kokkos_Macros.hpp>
#ifdef KOKKOS_ENABLE_EXPERIMENTAL_CXX20_MODULES
import kokkos.core;
#else
#include <Kokkos_Core.hpp>
#endif
namespace Test {
namespace {
template <class T, int N>
class MyArray {
public:
T values[N];
KOKKOS_INLINE_FUNCTION
void operator+=(const MyArray& src) {
for (int i = 0; i < N; i++) values[i] += src.values[i];
}
};
template <class T, int N, class PolicyType, int S>
struct FunctorFor {
double static_array[S];
KOKKOS_INLINE_FUNCTION
void operator()(const typename PolicyType::member_type& /*team*/) const {}
};
template <class T, int N, class PolicyType, int S>
struct FunctorReduce {
double static_array[S];
KOKKOS_INLINE_FUNCTION
void operator()(const typename PolicyType::member_type& /*team*/,
MyArray<T, N>& lval) const {
for (int j = 0; j < N; j++) lval.values[j] += 1 + lval.values[0];
}
};
} // namespace
using policy_type = Kokkos::TeamPolicy<TEST_EXECSPACE>;
using policy_type_128_8 =
Kokkos::TeamPolicy<TEST_EXECSPACE, Kokkos::LaunchBounds<128, 8> >;
// We need to special case for NVIDIA architectures which don't have space for
// 2048 threads ptxas warns and with errors as warning errors out: "ptxas error
// : Value of threads per SM for entry _ZN6... is out of range. .minnctapersm
// will be ignored" And yes I understand I am lying now with the name of the
// policy
#if defined(KOKKOS_ARCH_TURING75) || defined(KOKKOS_ARCH_AMPERE86) || \
defined(KOKKOS_ARCH_AMPERE87) || defined(KOKKOS_ARCH_ADA89) || \
defined(KOKKOS_ARCH_BLACKWELL120)
using policy_type_1024_2 =
Kokkos::TeamPolicy<TEST_EXECSPACE, Kokkos::LaunchBounds<1024, 1> >;
#else
using policy_type_1024_2 =
Kokkos::TeamPolicy<TEST_EXECSPACE, Kokkos::LaunchBounds<1024, 2> >;
#endif
template <class T, int N, class PolicyType, int S>
void test_team_policy_max_recommended_static_size(int scratch_size) {
PolicyType p = PolicyType(10000, Kokkos::AUTO, 4)
.set_scratch_size(0, Kokkos::PerTeam(scratch_size));
int team_size_max_for = p.team_size_max(FunctorFor<T, N, PolicyType, S>(),
Kokkos::ParallelForTag());
int team_size_rec_for = p.team_size_recommended(
FunctorFor<T, N, PolicyType, S>(), Kokkos::ParallelForTag());
int team_size_max_reduce = p.team_size_max(
FunctorReduce<T, N, PolicyType, S>(), Kokkos::ParallelReduceTag());
int team_size_rec_reduce = p.team_size_recommended(
FunctorReduce<T, N, PolicyType, S>(), Kokkos::ParallelReduceTag());
ASSERT_GE(team_size_max_for, team_size_rec_for);
ASSERT_GE(team_size_max_reduce, team_size_rec_reduce);
ASSERT_GE(team_size_max_for, team_size_max_reduce);
Kokkos::parallel_for(PolicyType(10000, team_size_max_for, 4)
.set_scratch_size(0, Kokkos::PerTeam(scratch_size)),
FunctorFor<T, N, PolicyType, S>());
Kokkos::parallel_for(PolicyType(10000, team_size_rec_for, 4)
.set_scratch_size(0, Kokkos::PerTeam(scratch_size)),
FunctorFor<T, N, PolicyType, S>());
MyArray<T, N> val;
double n_leagues = 10000;
Kokkos::parallel_reduce(
PolicyType(n_leagues, team_size_max_reduce, 4)
.set_scratch_size(0, Kokkos::PerTeam(scratch_size)),
FunctorReduce<T, N, PolicyType, S>(), val);
Kokkos::parallel_reduce(
PolicyType(n_leagues, team_size_rec_reduce, 4)
.set_scratch_size(0, Kokkos::PerTeam(scratch_size)),
FunctorReduce<T, N, PolicyType, S>(), val);
Kokkos::fence();
}
template <class T, int N, class PolicyType>
void test_team_policy_max_recommended(int scratch_size) {
test_team_policy_max_recommended_static_size<T, N, PolicyType, 1>(
scratch_size);
// FIXME_SYCL prevent running out of total kernel argument size limit
#ifdef KOKKOS_ENABLE_SYCL
test_team_policy_max_recommended_static_size<T, N, PolicyType, 100>(
scratch_size);
#else
test_team_policy_max_recommended_static_size<T, N, PolicyType, 1000>(
scratch_size);
#endif
}
TEST(TEST_CATEGORY, team_policy_max_recommended) {
int max_scratch_size = policy_type::scratch_size_max(0);
test_team_policy_max_recommended<double, 2, policy_type>(0);
test_team_policy_max_recommended<double, 2, policy_type>(max_scratch_size /
3);
test_team_policy_max_recommended<double, 2, policy_type>(max_scratch_size);
test_team_policy_max_recommended<double, 2, policy_type_128_8>(0);
test_team_policy_max_recommended<double, 2, policy_type_128_8>(
max_scratch_size / 3 / 8);
test_team_policy_max_recommended<double, 2, policy_type_128_8>(
max_scratch_size / 8);
test_team_policy_max_recommended<double, 2, policy_type_1024_2>(0);
test_team_policy_max_recommended<double, 2, policy_type_1024_2>(
max_scratch_size / 3 / 2);
test_team_policy_max_recommended<double, 2, policy_type_1024_2>(
max_scratch_size / 2);
test_team_policy_max_recommended<double, 16, policy_type>(0);
test_team_policy_max_recommended<double, 16, policy_type>(max_scratch_size /
3);
test_team_policy_max_recommended<double, 16, policy_type>(max_scratch_size);
test_team_policy_max_recommended<double, 16, policy_type_128_8>(0);
test_team_policy_max_recommended<double, 16, policy_type_128_8>(
max_scratch_size / 3 / 8);
test_team_policy_max_recommended<double, 16, policy_type_128_8>(
max_scratch_size / 8);
test_team_policy_max_recommended<double, 16, policy_type_1024_2>(0);
test_team_policy_max_recommended<double, 16, policy_type_1024_2>(
max_scratch_size / 3 / 2);
test_team_policy_max_recommended<double, 16, policy_type_1024_2>(
max_scratch_size / 2);
}
template <typename TeamHandleType, typename ReducerValueType>
struct MinMaxTeamLeagueRank {
KOKKOS_FUNCTION void operator()(const TeamHandleType& team,
ReducerValueType& update) const {
int const x = team.league_rank();
if (x < update.min_val) {
update.min_val = x;
}
if (x > update.max_val) {
update.max_val = x;
}
}
};
TEST(TEST_CATEGORY, team_policy_minmax_scalar_without_plus_equal_k) {
using ExecSpace = TEST_EXECSPACE;
using ReducerType = Kokkos::MinMax<int, Kokkos::HostSpace>;
using ReducerValueType = typename ReducerType::value_type;
using DynamicScheduleType = Kokkos::Schedule<Kokkos::Dynamic>;
using TeamPolicyType = Kokkos::TeamPolicy<ExecSpace, DynamicScheduleType>;
using TeamHandleType = typename TeamPolicyType::member_type;
static constexpr int num_teams = 17;
ReducerValueType val;
ReducerType reducer(val);
TeamPolicyType p(num_teams, Kokkos::AUTO);
MinMaxTeamLeagueRank<TeamHandleType, ReducerValueType> f1;
Kokkos::parallel_reduce(p, f1, reducer);
ASSERT_EQ(val.min_val, 0);
ASSERT_EQ(val.max_val, num_teams - 1);
}
} // namespace Test
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