Comment (by Steven R. Brandt):

I set and exported OMP_NUM_THREADS=4 and manually asked MPI to run with 12 procs. Is that considered wrong/buggy? I suppose I could also have set CACTUS_NUM_THREADS and CACTUS_NUM_PROCS. Regardless, I thought using smt threads was generally expected to be not helpful and to be avoided by default?

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/1326/running-loopcontrol-on-strange-number-of