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I'm searching for an MPICH option similar to what I_MPI_DEBUG=5 in Intel MPI does: prints process process mapping and shows which communication provider (e.g. TCP, infiband) is being used. Ideally, this would be in the form of an environment variable but I'd be happy to know about any command line parameters too. Does any option like this exist for MPICH 4? Many thanks. |
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You can set |
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Do you mean the CPU binding? E.g.
If so, you can try setting |
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You can set
MPIR_CVAR_DEBUG_SUMMARY=1
to let process 0 dump some information during init. There isn't a place to dump the process mapping currently, mostly because no one has requested yet :)