As Zachary explained below, each process is in a different directory, so he'll need to use an MPMD launch and can't do -n 16 directly. -- Pavan On 11/27/2012 09:42 PM US Central Time, Jeff Hammond wrote:

Did you try "mpiexec -n 16 ..."?

Sent from my iPhone

On Nov 27, 2012, at 10:37 PM, Zachary Stanko <[email protected] <mailto:[email protected]>> wrote:

...

Hello,

I am running an MPI program on a machine with two 16-core processors yet, no matter what configuration I use with mpiexec, I am only receiving 4 simultaneous processes. I would like to maximize this machine's potential and run 8 or 16 processes. I have tried all of the channel selections and tried the -binding option. Since I need to specify a different working directory for each process (due to many output files with naming conflicts), I have a config file with 8 lines of the form:

-n 1 -binding auto -dir <mydir01> <myprog> <inpfile> -n 1 -binding auto -dir <mydir02> <myprog> <inpfile> ...etc

and I run:

mpiexec -configfile <filename>

Am I doing something wrong, or does MPICH just know best and cannot run more than 4 jobs at a time on this system?

Thanks,

Zak _______________________________________________ discuss mailing list <mailto:[email protected]>[email protected] <mailto:[email protected]> To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss

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