Correct, i was not clear. It spawns more than 7 processes per node. (It spawns 8 of them). Rangam
________________________________________ From: users-boun...@open-mpi.org [users-boun...@open-mpi.org] On Behalf Of Ralph Castain [r...@open-mpi.org] Sent: Tuesday, March 02, 2010 11:55 AM To: Open MPI Users Subject: Re: [OMPI users] Option to use only 7 cores out of 8 on each node When you say "it fails", what do you mean? That it doesn't run at all, or that it still fills each node, or...? On Tue, Mar 2, 2010 at 9:49 AM, Addepalli, Srirangam V <srirangam.v.addepa...@ttu.edu<mailto:srirangam.v.addepa...@ttu.edu>> wrote: Hello All. I am trying to run a parallel application that should use one core less than the no of cores that are available on the system. Are there any flags that i can use to specify this. i tried using the following syntax with machinefile openmpi-1.4-BM/bin/mpirun -np 14 -npernode 7 -machinefile machinefile ven_nw.e <coll.dt5. This fails. Is there any other way around this. When i get two nodes (with 16 cores) allocated from SGE and we want to use only 14 cores out of the 16 allocated. Rangam My machine file has compute-9-8.local compute-9-8.local compute-9-8.local compute-9-8.local compute-9-8.local compute-9-8.local compute-9-8.local compute-9-6.local compute-9-6.local compute-9-6.local compute-9-6.local compute-9-6.local compute-9-6.local compute-9-6.local _______________________________________________ users mailing list us...@open-mpi.org<mailto:us...@open-mpi.org> http://www.open-mpi.org/mailman/listinfo.cgi/users
