I used to tune the performance of OpenMPI on InfiniBand by changing the OpenMPI MCA parameters for openib component (see https://www.open-mpi.org/faq/?category=openfabrics). Now I migrate to a new cluster that deploys Intel's omni-path interconnect, and my previous approach does not work any more. Does anyone know how to tune the performance for omni-path interconnect (what OpenMPI component to change) ?
The version of OpenMPI is openmpi-1.10.2-hfi. I have included the output from opmi_info and openib parameters that I used to change. Thanks! Sincerely, Michael
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