On Mon, Mar 11, 2019 at 12:19 PM Ralph H Castain <r...@open-mpi.org> wrote: > OFI uses libpsm2 underneath it when omnipath detected > > > On Mar 11, 2019, at 9:06 AM, Gilles Gouaillardet > > <gilles.gouaillar...@gmail.com> wrote: > > It might show that pml/cm and mtl/psm2 are used. In that case, then yes, > > the OmniPath library is used even for intra node communications. If this > > library is optimized for intra node, then it will internally uses shared > > memory instead of the NIC.
would it be fair to assume that, if we assume the opa library is optimized for intra-node using shared memory, there shouldn't be much of a difference between the opa library and the ompi library for local rank to rank comms is there a way or tool to measure that? i'd like to run the tests toggling opa vs ompi libraries and see if or really how much a difference there is _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
