Hello I try to place executables on different sockets on different nodes with Open MPI 2.1.1. Therefore I use something like the following command: mpirun --map-by ppr:1:node -np 1 numactl -N 0 /bin/hostname : -np 1 numactl -N 1 /bin/hostname But from the output I see, that all processes are placed on the same node.
Trying the same with Intel MPI using the following command export I_MPI_JOB_RESPECT_PROCESS_PLACEMENT=no mpirun -ppn 1 -np 1 /bin/hostname : -np 1 /bin/hostname processes go to different nodes as desired. So I am wondering if "--map-by" is a "local option" according to the mpirun man page and how I can achieve the desired behaviour with Open MPI. Thanks for your help. Best Christoph Niethammer _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
