I often use mpirun --np 2 --machinefile mpd.hosts mpitests-osu_latency mpirun --np 2 --machinefile mpd.hosts mpitests-osu_bw To test bandwidth and latency between to specific nodes (listed in mpd.hosts). On a CentOS/Redhat system these can be installed from the package mpitests-openmpi.
/jon On 2 August 2017 at 18:44:17 +02:00, Faraz Hussain <i...@feacluster.com> wrote: > I have inherited a 20-node cluster that supposedly has an infiniband network. > I am testing some mpi applications and am seeing no performance improvement > with multiple nodes. So I am wondering if the Infiband network even works? > > The output of ifconfig -a shows an ib0 and ib1 network. I ran ethtools ib0 > and it shows: > > Speed: 40000Mb/s > Link detected: no > > and for ib1 it show: > > Speed: 10000Mb/s > Link detected: no > > I am assuming this means it is down? Any idea how to debug further and > restart it? > > Thanks! > > _______________________________________________ > 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> >
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