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4 //
5 // Kokkos v. 3.0
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7 // Solutions of Sandia, LLC (NTESS).
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43 */
44
45 // @Kokkos_Feature_Level_Required:10
46 // Unit test for hierarchical parallelism
47 // Create concurrent work hierarchically and verify if
48 // contributions of paticipating processing units corresponds to expected value
49
50 #include <gtest/gtest.h>
51 #include <Kokkos_Core.hpp>
52
53 namespace Test {
54
55 template <class ExecSpace>
56 struct HierarchicalBasics {
57 using policy_t = Kokkos::TeamPolicy<ExecSpace>;
58 using team_t = typename policy_t::member_type;
59
runTest::HierarchicalBasics60 void run(const int nP, int nT) {
61 if (nT > ExecSpace::concurrency()) nT = ExecSpace::concurrency();
62
63 policy_t pol(nP, nT);
64
65 ASSERT_EQ(pol.league_size(), nP);
66 ASSERT_LE(pol.team_size(), nT);
67
68 nT = pol.team_size();
69
70 Kokkos::View<int **, ExecSpace> v("Array_A", nP, nT);
71 Kokkos::parallel_for(
72 "Teams", pol, KOKKOS_LAMBDA(const team_t &team) {
73 const int tR = team.team_rank();
74 const int tS = team.team_size();
75 const int lR = team.league_rank();
76 const int lS = team.league_size();
77 if (lR < lS) {
78 v(lR, tR) = lR * tS + tR;
79 } else {
80 v(lR, tR) = 100000;
81 }
82 });
83 Kokkos::fence();
84 auto h_v = Kokkos::create_mirror_view_and_copy(Kokkos::HostSpace(), v);
85
86 size_t check = 0;
87 size_t ref = nP * nT;
88 for (int i = 0; i < nP; ++i)
89 for (int j = 0; j < nT; ++j) check += h_v(i, j);
90
91 ASSERT_EQ(check, ref * (ref - 1) / 2);
92 }
93 };
94
TEST(TEST_CATEGORY,IncrTest_10_Hierarchical_Basics)95 TEST(TEST_CATEGORY, IncrTest_10_Hierarchical_Basics) {
96 HierarchicalBasics<TEST_EXECSPACE> test;
97
98 // OpenMPTarget backend only accepts >= 32 threads per team
99 #if defined(KOKKOS_ENABLE_OPENMPTARGET)
100 test.run(1, 32);
101 test.run(8, 64);
102 test.run(11, 128);
103 #else
104 test.run(1, 4);
105 test.run(8, 16);
106 test.run(11, 13);
107 #endif
108 }
109
110 } // namespace Test
111