Hello all, I have been doing some MPI benchmarking on an Infiniband cluster.
Specs are: 12 cores/node 2.9ghz/core Infiniband interconnect (TCP also available) Some runtime numbers: 192 cores total: (16 nodes) IntelMPI: 0.4 seconds OpenMPI 3.1.3 (--mca btl ^tcp): 2.5 seconds OpenMPI 3.1.3 (--mca btl ^openib): 26 seconds As you can see there are some issues with these numbers - I suspect user error may be to blame. Are there any additional arguments I should be passing to mpirun in order to get some more performance out of OpenMPI? My command currently looks like: mpirun -np 192 --hostfile $HOSTS --mca btl ^tcp ./<application> Any advice would be appreciated, Thanks, Cooper Cooper Burns Senior Research Engineer <https://www.linkedin.com/company/convergent-science-inc> <https://www.facebook.com/ConvergentScience> <https://twitter.com/convergecfd> <https://www.youtube.com/user/convergecfd> <https://vimeo.com/convergecfd> (608) 230-1551 convergecfd.com <https://convergecfd.com/?utm_source=Email&utm_medium=signature&utm_campaign=CSIEmailSignature>
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