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sparse_sort_crs: fix column shuffle indices #2346

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merged 2 commits into from
Oct 7, 2024
+5 −1
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sparse_sort_crs: fix column shuffle indices #2346

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3d6bbb2
random_shuffle -> shuffle
cwpearson Sep 26, 2024
47babb4
sparse_sort_crs: Fix row begin/end offset in entry shuffle
cwpearson Sep 26, 2024
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6 changes: 5 additions & 1 deletion perf_test/sparse/KokkosSparse_sort_crs.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -79,8 +79,12 @@ void run_experiment(int argc, char** argv, const CommonInputParams& common_param
// Randomly shuffle the entries within each row, so that the rows aren't
// already sorted. Leave the values alone; this changes the matrix numerically
// but this doesn't affect sorting.
std::random_device rd;
std::mt19937 g(rd());
for (lno_t i = 0; i < m; i++) {
std::random_shuffle(entriesHost.data() + i, entriesHost.data() + i + 1);
const size_type rowBegin = rowmapHost(i);
const size_type rowEnd = rowmapHost(i + 1);
std::shuffle(entriesHost.data() + rowBegin, entriesHost.data() + rowEnd, g);
}
Kokkos::deep_copy(shuffledEntries, entriesHost);
exec_space exec;
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