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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 #include <Kokkos_Core.hpp>
46 #include <gtest/gtest.h>
47
48 /// @Kokkos_Feature_Level_Required:16
49 // Incremental test for parallel_scan.
50 // perform scan on a 1D view of double's and check for correctness.
51
52 namespace Test {
53
54 using value_type = double;
55 const int N = 10;
56
57 template <class ExecSpace>
58 struct TestScan {
59 // 1D View of double
60 using View_1D = typename Kokkos::View<value_type *, ExecSpace>;
61
parallel_scanTest::TestScan62 void parallel_scan() {
63 View_1D d_data("data", N);
64
65 // Initialize data.
66 Kokkos::parallel_for(
67 Kokkos::RangePolicy<ExecSpace>(0, N),
68 KOKKOS_LAMBDA(const int i) { d_data(i) = i * 0.5; });
69
70 // Exclusive parallel_scan call.
71 Kokkos::parallel_scan(
72 Kokkos::RangePolicy<ExecSpace>(0, N),
73 KOKKOS_LAMBDA(const int i, value_type &update_value, const bool final) {
74 const value_type val_i = d_data(i);
75 if (final) d_data(i) = update_value;
76
77 update_value += val_i;
78 });
79
80 // Copy back the data.
81 auto h_data =
82 Kokkos::create_mirror_view_and_copy(Kokkos::HostSpace(), d_data);
83
84 // Check Correctness
85 ASSERT_EQ(h_data(0), 0.0);
86 value_type upd = h_data(0);
87 for (int i = 1; i < N; ++i) {
88 upd += (i - 1) * 0.5;
89 ASSERT_EQ(h_data(i), upd);
90 }
91 }
92 };
93
TEST(TEST_CATEGORY,IncrTest_16_parallelscan)94 TEST(TEST_CATEGORY, IncrTest_16_parallelscan) {
95 TestScan<TEST_EXECSPACE> test;
96 test.parallel_scan();
97 }
98
99 } // namespace Test
100