Fix issue with MPI tags on some MPI distributions. #1268
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cyrush
approved these changes
Apr 8, 2024
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Some blueprint algorithms use MPI tags to help indicate intent of a message and they may use large numbers for the tags. It turns out that some MPI distributions do not like large tag values. This PR changes a communication helper class in relay so it passes tags through a safe_tag() function that clamps tags at MPI_TAG_UB so they work with MPI rather than having MPI abort.