%_openmpi_load \
 . /etc/profile.d/modules.sh; \
 module load mpi/openmpi-%{_arch}; \
 export PRTE_MCA_rmaps_default_mapping_policy=:oversubscribe
%_openmpi_unload \
 . /etc/profile.d/modules.sh; \
 module unload mpi/openmpi-%{_arch};