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Possible bug in "native-merge" SpMV algorithm #2033

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cwpearson opened this issue Nov 7, 2023 · 1 comment
Open
2 tasks

Possible bug in "native-merge" SpMV algorithm #2033

cwpearson opened this issue Nov 7, 2023 · 1 comment
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@cwpearson

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@cwpearson
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#2010 was caused by the merge-based SpMV algorithm being selected in Tpetra for this specific mini-em case. The merge-based SpMV was incorrectly re-using the "merge" algorithm name, and the fix was to change it to "native-merge" so that the merge-based implementation is no longer used.

It's not clear whether something is not quite right with the matrix, or if there is a bug in the merge-based SpMV implementation.

  • modify the reproducer to dump the local matrix on each rank
  • test the "native-merge" SpMV algorithm on the dumped matrices
    • see what there is to see
@cwpearson cwpearson self-assigned this Nov 7, 2023
@brian-kelley
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brian-kelley commented May 17, 2024 •
edited

@cwpearson I think this is the same issue as #2166?

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