[mpich-discuss] I can not control the number of processes on a multicore machine

[Pavan Balaji]

You need to use:

% mpdboot -f mpd.hosts -n 2 --ncpus=4

Or you can use Hydra (this does not require mpdboot at all):

% mpiexec.hydra -f mpd.hosts -n 8 vasp

 -- Pavan

On 11/11/2009 09:43 PM, jiajf wrote:
> I use MPICH2, I have two linux box with 4 cpus respectively. my
> mpd.hosts is as follows:
> 
> m0101:4
> m0102:4
> 
> the mpd is started by mpdboot -f mpd.hosts.
> when I use mpiexec as follows:
> "mpiexec -n 8 vasp"
> 
> I found five processes is running on m0101 and other three on m0102. I
> want to know how to run four processes on every box?
> Is anyone can help?
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji