You are probably using the ofi mtl - could be psm2 uses loopback method? Sent from my iPhone
> On Mar 11, 2019, at 8:40 AM, Michael Di Domenico <mdidomeni...@gmail.com> > wrote: > > i have a user that's claiming when two ranks on the same node want to > talk with each other, they're using the NIC to talk rather then just > talking directly. > > i've never had to test such a scenario. is there a way for me to > prove one way or another whether two ranks are talking through say the > kernel (or however it actually works) or using the nic? > > i didn't set any flags when i compiled openmpi to change this. > > i'm running ompi 3.1, pmix 2.2.1, and slurm 18.05 running atop omnipath > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/users _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
