What you probably want to do is add --cpu-list a,b,c... to each mpirun command, where each one lists the cores you want to assign to that job.
> On Sep 8, 2017, at 6:46 AM, twu...@goodyear.com wrote: > > > I posted this question last year and we ended up not upgrading to the newer > openmpi. Now I need to change to openmpi 1.10.5 and have the same issue. > > Specifically, using 1.4.2, I can run two 12 core jobs on a 24 core node and > the > processes would bind to cores and only have 1 process per core. ie not > oversubscribe. > > What I used with 1.4.2 was: > mpirun --mca mpi_paffinity_alone 1 --mca btl openib,tcp,sm,self ... > > Now with 1.10.5, I have tried multiple combinations of map-to core, bind-to > core > etc and cannot run 2 jobs on the same node without oversubcribing. > > Is there a solution to this? > > Thanks for any info > tom > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/users _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
