I tried mpi-io tests from mpich 4.3 with openmpi 4.1 on the ac922 system that I understand was used to fix ompio problems on lustre. I'm puzzled that I still see failures.
I don't know why there are disjoint sets in mpich's test/mpi/io and src/mpi/romio/test, but I ran all the non-Fortran ones with MCA io defaults across two nodes. In src/mpi/romio/test, atomicity failed (ignoring error and syshints); in test/mpi/io, the failures were setviewcur, tst_fileview, external32_derived_dtype, i_bigtype, and i_setviewcur. tst_fileview was probably killed by the 100s timeout. It may be that some are only appropriate for romio, but no-one said so before and they presumably shouldn't segv or report libc errors. I built against ucx 1.9 with cuda support. I realize that has problems on ppc64le, with no action on the issue, but there's a limit to what I can do. cuda looks relevant since one test crashes while apparently trying to register cuda memory; that's presumably not ompio's fault, but we need cuda.
