[mpich-discuss] Hydra binding option

[Pavan Balaji]

To bind them to the same core you need to give:

mpiexec -binding user:0,0 -n 2 ./myprocess

"-1" means that you don't care where the second process is bound to, and 
the OS will schedule it wherever it likes (likely to the second core).

  -- Pavan

On 07/21/2012 04:52 PM, Gonzalo Martín Cruz wrote:
> Hi all,
>
> I am working with MPICH2 v.1.4.1p1 in a dual core machine and I am
> trying to bind two mpi processes to run in the same core (id 0)
> executing the following command:
>
> mpiexec -binding user:0,-1 -n 2 ./myprocess
>
> But this way every process is binded to one different core (id 0 and 1
> respectively). The only way I have been able to binding both processes
> to same core (id 0) is executing the following command two times:
>
> mpiexec -binding user:0 -n 1 ./myprocess
>
> What am I doing wrong?
>
> Thank you guys!
>
> ------------------------------------------------------------------------------------------------
> Gonzalo Martín Cruz
> Computer Arquitecture Group
> Computer Science Department
> Universidad Carlos III de Madrid
> e-mail: gmcruz at arcos.inf.uc3m.es <mailto:gmcruz at arcos.inf.uc3m.es>
> ------------------------------------------------------------------------------------------------
>
>
>
>
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji