Do not include the “bind-to core” option.the mapping directive already forces that
Sent from my iPad > On Nov 16, 2017, at 7:44 AM, Noam Bernstein <noam.bernst...@nrl.navy.mil> > wrote: > > Hi all - I’m trying to run mixed MPI/OpenMP, so I ideally want binding of > each MPI process to a small set of cores (to allow for the OpenMP threads). > From the mpirun docs at > https://www.open-mpi.org//doc/current/man1/mpirun.1.php > I got the example that I thought corresponded to what I want, > % mpirun ... --map-by core:PE=2 --bind-to core > So I tried > mpirun -x OMP_NUM_THREADS --map-by core:PE=4 --bind-to core -np 32 python > ….. > > However, when I run this (with openmpi 3.0.0 or with 1.8.8) I get the > following error: > A request for multiple cpus-per-proc was given, but a directive > was also give to map to an object level that cannot support that > directive. > > Please specify a mapping level that has more than one cpu, or > else let us define a default mapping that will allow multiple > cpus-per-proc. > > Am I doing something wrong, or is there a mistake in the docs, and it should > bind to something other than core? > > > thanks, > > Noam > > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/users
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