Hilarious - I wrote that code and I have no idea who added that option or what it is supposed to do. I can assure, however, that it isn’t implemented anywhere.
Perhaps if you tell us what pattern you are trying to get, we can advise you on the proper cmd line to get there? On Jun 21, 2019, at 1:43 PM, Noam Bernstein <noam.bernst...@nrl.navy.mil <mailto:noam.bernst...@nrl.navy.mil> > wrote: On Jun 21, 2019, at 4:04 PM, Ralph Castain via users <firstname.lastname@example.org <mailto:email@example.com> > wrote: I’m unaware of any “map-to cartofile” option, nor do I find it in mpirun’s help or man page. Are you seeing it somewhere? >From "mpirun —help”: tin 1431 : mpirun --help mapping mpirun (Open MPI) 4.0.1 Usage: mpirun [OPTION]... [PROGRAM]... Start the given program using Open RTE -cf|--cartofile <arg0> Provide a cartography file followed by all the other mapping-related options. Maybe what I want is best described as not doing round-robin, but I see no way to do that either. Noam
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