[Beowulf] How to know if infiniband network works?

[Michael Di Domenico]

On Thu, Aug 3, 2017 at 10:10 AM, Faraz Hussain <info at feacluster.com> wrote:
> Thanks, I installed the MPI tests from Ohio State. I ran osu_bw and got the
> results below. What is confusing is I get the same result if I use tcp or
> openib ( by doing --mca btl openib|tcp,self with my mpirun command ). I also
> tried changing the environment variable: export OMPI_MCA_btl=tcp,self,sm .
> Results are the same regardless of tcp or openib..
>
> And when I do ifconfig -a I still see zero traffic reported for the ib0 and
> ib1 network.

if openmpi uses RDMA for the traffic ib0/ib1 will not show traffic,
you have to use perfquery