Oops wrong list, sorry :)
Le 15/11/2019 à 10:49, Brice Goglin a écrit : > Hello > > We have a platform with an old MLX4 partition and another OPA partition. > We want a single OMPI installation working for both kinds of nodes. When > we enable UCX in OMPI for MLX4, UCX ends up being used on the OPA > partition too, and the performance is poor (3GB/s instead of 10). The > problem seems to be that UCX gets enabled because they added support for > OPA in UCX 1.6 even that's just poor OPA support through Verbs. > > The only solution we found is to bump the mtl_psm2_priority to 52 so > that PSM2 gets used before PML UCX. Seems to work fine but I am not sure > it's a good idea. Could OMPI rather tell UCX to disable itself when it > only finds OPA? > > Thanks > > Brice > > > _______________________________________________ > hwloc-users mailing list > hwloc-users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/hwloc-users _______________________________________________ hwloc-users mailing list hwloc-users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/hwloc-users
