I am running into dead ends trying to find an mpirun option to display the device selected for each process. I use
mpirun --report-bindings to view the bindings to nodes/cpus/cores. But I cannot find an equivalent option that displays the hardware path used for OpenMPI messaging. Or the device parameters that go with that, if they are programmable. I have found I can see the openib message selecting InfiniBand when I add -mca btl_base_verbose 10 [compute-0-30.local:02597] [rank=0] openib: using port mlx4_0:1 But, I get lots of other messages that are just noise for this purpose. There must be a routing table somewhere being constructed (ORTE?). I could not find an MCA option to show that. Is there a better way to get this information? My Google searching has not turned up anything. If not, I'd like to put in a request for an mpirun option similar to --report-bindings that displays the routing table and/or device bindings and programmable settings used. Thank you very much. Larry Baker US Geological Survey 650-329-5608 ba...@usgs.gov
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