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