Small optimization on the datatype commit. #6945
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This patch fixes the merge of contiguous elements into larger but more compact datatypes, and allows for contiguous elements to have thir blocklen increasing instead of the count. The idea is to always maximize the blocklen, aka. the contiguous part of the datatype. Signed-off-by: George Bosilca <bosilca@icl.utk.edu>
elements that can be merged into a larger UINT1 type. Signed-off-by: George Bosilca <bosilca@icl.utk.edu>
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I was able to track back the issue by looking at the datatype from issue #6932. It failed to merge into a single predefined element but the datatype was marked as contiguous, allowing the datatype engine to use one of the optimized pack/unpack function (contig_with_gaps). However, having a composed description mislead the contig_with_gaps function to wrongly interpret the shape of the datatype. Anyway, long story short, this patch fixes the issue and add a test to prevent it from happening in the future. Once merged it should be backported to v3 and v4. |
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@bosilca Any particular reason not to merge this PR? |
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It need to be backported but I don't have time to do it right now. Feel free to do so. |
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This patch fixes the merge of contiguous elements into larger but more
compact datatypes, and allows for contiguous elements to have thir
blocklen increasing instead of the count. The idea is to always maximize
the blocklen, aka. the contiguous part of the datatype.
Possible fix for #6932
Signed-off-by: George Bosilca bosilca@icl.utk.edu