[mpich-discuss] a question about process-core binding

[Pavan Balaji]

I'm confused here. Your hostfile is requesting for the first 24 
processes to be launched on the first node, the next 24 on the second 
node, and so on. So, Hydra is doing exactly what I'd expect it to. If 
you want to override the number of processes to launch on each node, you 
can use the -ppn option:

% mpiexec -ppn 1 -f hostfile ./foo

  -- Pavan

On 08/02/2011 08:28 PM, teng ma wrote:
> stremi-37.reims.grid5000.fr:24 <http://stremi-37.reims.grid5000.fr:24>
> stremi-34.reims.grid5000.fr:24 <http://stremi-34.reims.grid5000.fr:24>
> stremi-26.reims.grid5000.fr:24 <http://stremi-26.reims.grid5000.fr:24>
> stremi-39.reims.grid5000.fr:24 <http://stremi-39.reims.grid5000.fr:24>
> stremi-3.reims.grid5000.fr:24 <http://stremi-3.reims.grid5000.fr:24>
> stremi-7.reims.grid5000.fr:24 <http://stremi-7.reims.grid5000.fr:24>
> stremi-40.reims.grid5000.fr:24 <http://stremi-40.reims.grid5000.fr:24>
> stremi-28.reims.grid5000.fr:24 <http://stremi-28.reims.grid5000.fr:24>
> stremi-5.reims.grid5000.fr:24 <http://stremi-5.reims.grid5000.fr:24>
> stremi-35.reims.grid5000.fr:24 <http://stremi-35.reims.grid5000.fr:24>
> stremi-32.reims.grid5000.fr:24 <http://stremi-32.reims.grid5000.fr:24>
> stremi-23.reims.grid5000.fr:24 <http://stremi-23.reims.grid5000.fr:24>
> stremi-22.reims.grid5000.fr:24 <http://stremi-22.reims.grid5000.fr:24>
> stremi-25.reims.grid5000.fr:24 <http://stremi-25.reims.grid5000.fr:24>
> stremi-41.reims.grid5000.fr:24 <http://stremi-41.reims.grid5000.fr:24>
> stremi-38.reims.grid5000.fr:24 <http://stremi-38.reims.grid5000.fr:24>
> stremi-6.reims.grid5000.fr:24 <http://stremi-6.reims.grid5000.fr:24>
> stremi-43.reims.grid5000.fr:24 <http://stremi-43.reims.grid5000.fr:24>
> stremi-4.reims.grid5000.fr:24 <http://stremi-4.reims.grid5000.fr:24>
> stremi-36.reims.grid5000.fr:24 <http://stremi-36.reims.grid5000.fr:24>
> stremi-33.reims.grid5000.fr:24 <http://stremi-33.reims.grid5000.fr:24>
> stremi-30.reims.grid5000.fr:24 <http://stremi-30.reims.grid5000.fr:24>
> stremi-8.reims.grid5000.fr:24 <http://stremi-8.reims.grid5000.fr:24>
> stremi-29.reims.grid5000.fr:24 <http://stremi-29.reims.grid5000.fr:24>
> stremi-27.reims.grid5000.fr:24 <http://stremi-27.reims.grid5000.fr:24>
> stremi-21.reims.grid5000.fr:24 <http://stremi-21.reims.grid5000.fr:24>
> stremi-44.reims.grid5000.fr:24 <http://stremi-44.reims.grid5000.fr:24>
> stremi-31.reims.grid5000.fr:24 <http://stremi-31.reims.grid5000.fr:24>
> stremi-9.reims.grid5000.fr:24 <http://stremi-9.reims.grid5000.fr:24>
> stremi-42.reims.grid5000.fr:24 <http://stremi-42.reims.grid5000.fr:24>
> stremi-24.reims.grid5000.fr:24 <http://stremi-24.reims.grid5000.fr:24>
> stremi-20.reims.grid5000.fr:24 <http://stremi-20.reims.grid5000.fr:24>
>
> On Tue, Aug 2, 2011 at 7:58 PM, Pavan Balaji <balaji at mcs.anl.gov
> <mailto:balaji at mcs.anl.gov>> wrote:
>
>
>     On 08/02/2011 03:49 PM, teng ma wrote:
>
>         Another problem is still -binding rr.  -binding rr looks still
>         filling
>         out 1st node's all  slots and then 2nd node's.  Its binding
>         looks the
>         same with cpu on my case.   Do I need some trick on hostfile to
>         reach an
>         effect of OpenMPI's -bynode or MVAPICH2's scatter?
>
>
>     What does the hostfile contain? Can you send it to us?
>
>     --
>     Pavan Balaji
>     http://www.mcs.anl.gov/~balaji <http://www.mcs.anl.gov/%7Ebalaji>
>
>

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji