On Thu, 25 Jun 2020 14:04:12 +0000 "CHESTER, DEAN \(PGR\) 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. We run several truescale clusters but I've not tried OpenMPI-4.x there... /Peter K
