Faraz, do you mean the IPOIB tcp network, ie the ib0 interface? Good question. I would advise joining the Openmpi list. They are very friendly over there. I have always seen polite and helpful replies even to dumb questions there (such as the ones I ask).
I actually had to do something similar recently - we have nodes with only IB, so I had to run OpenMPI over Infiniband, but also say that the control connection had to use the ib0 interface. On 3 August 2017 at 17:41, Faraz Hussain <i...@feacluster.com> wrote: > Thanks for everyone's help. Using the Ohio State tests, qperf and > perfquery I am convinced the IB network is working. The only thing that > still bothers me is I can not get mpirun to use the tcp network. I tried > all combinations of --mca btl to no avail. It is not important, more just > curiosity. > > > > Quoting Michael Di Domenico <mdidomeni...@gmail.com>: > > On Thu, Aug 3, 2017 at 10:10 AM, Faraz Hussain <i...@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 >> _______________________________________________ >> Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing >> To change your subscription (digest mode or unsubscribe) visit >> http://www.beowulf.org/mailman/listinfo/beowulf >> > > > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf >
_______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
