Gihub CI: demonstrate fails when using OpenMPI 5.0.5 #1070
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wkliao
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DO NOT MERGE
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Close this for now. It can be reopened later to test the future release of OpenMPI. |
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After several tests using different versions of OpenMPI, it appears that
5.0.6 fixed the data sieving problem we suspect. This PR demonstrates
it by building Darshan with both 5.0.5 and 5.0.6. Only 5.0.5 failed.
The small test MPI program
mpi_file_write.ccalls onlyMPI_File_write()once, running on 4 MPI processes. when using OpenMPI 5.0.5, the test
program ran fine, but the contents of generated Darshan log file were corrupted.
According to OpenMPI 5.0.6 Release note:
UFS component to ensure data consistency, especially when using
data-sieving operations, which require broader locking.
Most likely relevant fix in OpenMPI 5.0.6 is open-mpi/ompi#12759