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openpmix / prrte

PMIx Reference RunTime Environment (PRRTE)
https://pmix.org
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--tune (ompi option) does not know the mca-param-sets directory #559

Closed abouteiller closed 3 years ago

abouteiller commented 4 years ago

When using mpiexec --tune file we get an error because --tune supports only absolute or relative paths, but does not account for the by-default directories in opal_mca_param_base_file_path (that should resolve to $ompi-prefix/share/openmpi/amca-param-sets/).

Open MPI bug https://github.com/open-mpi/ompi/issues/7737 is possibly related.

Background information

What version of the PMIx Reference Server are you using? (e.g., v1.0, v2.1, git master @ hash, etc.)

Open MPI master

Details of the problem

 salloc -N 1 -Ccauchy  /home/bouteill/ompi/ulfm/ulfm2/debug.build/bin/mpiexec  -n 4  --tune ft-mpi  --omca mpi_show_mca_params env,file,api     02.err_handler
--------------------------------------------------------------------------
Unable to locate the variable file:
   ft-mpi
--------------------------------------------------------------------------

salloc -N 1 -Ccauchy  /home/bouteill/ompi/ulfm/ulfm2/debug.build/bin/mpiexec  -n 4  --tune /home/bouteill/ompi/ulfm/ulfm2/debug.build/share/openmpi/amca-param-sets/ft-mpi  --omca mpi_show_mca_params env,file,api  02.err_handler

(works as intended)
rhc54 commented 4 years ago

That default path no longer exists as the amca parameters are no longer supported. There has been some discussion about providing a path for tune files, but that is sitting in a branch waiting for me to get back to it.