Gilles' question is correct; the larger point to make here: the openib BTL is obsolete and is actively replaced by the UCX PML. UCX is supported by the vendor (NVIDIA); openib is not.
If you're just starting a new project, I would strongly advocate using UCX instead of openib. On Nov 1, 2021, at 8:26 AM, Gilles Gouaillardet via users <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> wrote: Hi Ben, have you tried export OMPI_MCA_common_ucx_opal_mem_hooks=1 Cheers, Gilles On Mon, Nov 1, 2021 at 9:22 PM bend linux4ms.net<http://linux4ms.net/> via users <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> wrote: Ok, I a am newbie supporting the a HPC project and learning about MPI. I have the following portion of a shells script: export OMPI_MCA_btl_openib_allow_ib=1 export OMPI_MCA_btl_openib_if_include="mlx5_0:1" mpirun -machinefile ${hostlist} \ --mca opal_common_ucx_opal_mem_hooks 1 \ -np $NP \ -N $rpn \ -vv \ My question is there a way to take the '-mca opal_common_ucx_opal_mem_hooks 1 ' and make it into a environment variable like the others ? Thanks Ben Duncan - Business Network Solutions, Inc. 336 Elton Road Jackson MS, 39212 "Never attribute to malice, that which can be adequately explained by stupidity" - Hanlon's Razor -- Jeff Squyres jsquy...@cisco.com<mailto:jsquy...@cisco.com>
