1 /*
2 //@HEADER
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4 //
5 // Kokkos v. 3.0
6 // Copyright (2020) National Technology & Engineering
7 // Solutions of Sandia, LLC (NTESS).
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9 // Under the terms of Contract DE-NA0003525 with NTESS,
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42 //@HEADER
43 */
44
45 // @Kokkos_Feature_Level_Required:13
46 // Unit test for hierarchical parallelism
47 // Create concurrent work hierarchically and verify if
48 // sum of created processing units corresponds to expected value
49
50 #include <gtest/gtest.h>
51 #include <Kokkos_Core.hpp>
52
53 using SCALAR_TYPE = int;
54
55 namespace Test {
56
57 template <class ExecSpace>
58 struct Hierarchical_Red_B {
runTest::Hierarchical_Red_B59 void run(const int pN, const int sX) {
60 using team_policy = Kokkos::TeamPolicy<ExecSpace>;
61 using member_type = typename Kokkos::TeamPolicy<ExecSpace>::member_type;
62
63 using viewDataType = Kokkos::View<SCALAR_TYPE *, ExecSpace>;
64 viewDataType v("Vector", pN);
65
66 Kokkos::parallel_for(
67 "Team", team_policy(pN, Kokkos::AUTO),
68 KOKKOS_LAMBDA(const member_type &team) {
69 const int n = team.league_rank();
70 SCALAR_TYPE out = 0;
71
72 Kokkos::parallel_reduce(
73 Kokkos::TeamVectorRange(team, sX),
74 [=](const int i, SCALAR_TYPE &tmp) {
75 tmp += n * v.extent(0) + i;
76 },
77 out);
78
79 Kokkos::single(Kokkos::PerTeam(team), [&]() { v(n) += out; });
80 });
81
82 Kokkos::fence();
83 auto v_H = Kokkos::create_mirror_view_and_copy(Kokkos::HostSpace(), v);
84
85 SCALAR_TYPE check = 0;
86 SCALAR_TYPE ref = 0;
87 for (int i = 0; i < pN; ++i) {
88 check += v_H(i);
89 ref += ((sX + i * pN) * (sX + i * pN - 1) - (i * pN * (i * pN - 1))) / 2;
90 }
91 ASSERT_EQ(check, ref);
92 }
93 };
94
TEST(TEST_CATEGORY,IncrTest_13b_Hierarchical_Red)95 TEST(TEST_CATEGORY, IncrTest_13b_Hierarchical_Red) {
96 Hierarchical_Red_B<TEST_EXECSPACE> test;
97 test.run(4, 16);
98 test.run(2, 39);
99 test.run(39, 3);
100 }
101
102 } // namespace Test
103