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From: Michael John Hanby (mhanby_at_[hidden])
Date: 2006-12-20 18:28:26

Howdy, I'm new to cluster administration, MPI and high speed networks.

I've compiled my OpenMPI using these settings:

./configure CC='icc' CXX='icpc' FC='ifort' F77='ifort'
--with-mvapi-libdir=/usr/local/topspin/lib64 --enable-static

I'm running a Gromacs -np 16 job that I submitting using Sun Grid Engine
and OpenMPI that's going to run for several hours.

The job was submitted with:
mpirun -np 16 -machinefile machines mdrun ......

I've been asked by the owner of the cluster "How can you prove to me
that this openmpi job is using the Infiniband network?"

At first I thought a simple netstat -an on the compute nodes might tell
me, however I don't see the Infiniband IP's in the list so I'm thinking
maybe I need to be looking elsewhere.

Ompi_info reports:
  MCA mpool: mvapi (MCA v1.0, API v1.0, Component v1.1.2)
  MCA btl: mvapi (MCA v1.0, API v1.0, Component v1.1.2)

Thanks for any suggestions,