On Jun 26, 2020, at 7:30 AM, Peter Kjellström via users
<users@lists.open-mpi.org> wrote:
>
>> The cluster hardware is QLogic infiniband with Intel CPUs. My
>> understanding is that we should be using the old PSM for networking.
>>
>> Any thoughts what might be going wrong with the build?
>
> Yes only PSM will perform well on that hardware. Make sure that PSM
> works on the system. Then make sure you got a mca_mtl_psm built.
I think Peter is right: you want to use
mpirun --mca pml cm --mca mtl psm ...
I *think* Intel InfiniPath is PSM and Intel OmniPath is PSM2, so "psm" is what
you want (not "psm2").
Don't try to use pml/ob1 + btl/openib, and don't try to use UCX. PSM is
Intel's native support for its Infinipath network.
--
Jeff Squyres
jsquy...@cisco.com
