[mpich2-dev] running mpich2 single pc dual core machine

[Rajeev Thakur]

You can run multiple application processes. For example:
 
% mpd &
% mpiexec -n 4 a.out
 
will run 4 a.out processes on the same machine.
 
For best performance, configure MPICH2 with --with-device=ch3:nemesis and
rerun make, make install.
 
Rajeev
 


  _____  

From: owner-mpich2-dev at mcs.anl.gov [mailto:owner-mpich2-dev at mcs.anl.gov] On
Behalf Of Alexandre Souza
Sent: Friday, July 11, 2008 2:47 PM
To: mpich2-dev at mcs.anl.gov
Subject: Re: [mpich2-dev] running mpich2 single pc dual core machine


Hi,
I am confused.. So there is no advantage in using mpich2 in a single pc dual
core machine ?
Thanks,
Alex


On 7/11/08, Rajeev Thakur <thakur at mcs.anl.gov> wrote: 

On a single PC, you just need to do "mpd &". Only a single mpd daemon is
needed for all processes on that machine.
 
Rajeev


  _____  

From: owner-mpich2-dev at mcs.anl.gov [mailto:owner-mpich2-dev at mcs.anl.gov] On
Behalf Of Alexandre Souza
Sent: Friday, July 11, 2008 9:46 AM
To: mpich2-dev at mcs.anl.gov
Subject: [mpich2-dev] running mpich2 single pc dual core machine




Hi All,

I have one question regarding running 2 processes in a single pc dual core
machine:

if I have two (one core) pcs I start the mpich with : mpdboot -n 2 -f
~/mpd.hosts

with mpd.hosts contents: node0

                                      node1

How can I use mpdboot in a single pc with dual core in order to have the
same effect above.

Is using : mpdboot -n 1 ~/mpd.hosts -ncpus=2 a correct approach ?

 (in the last case mpd.hosts contents is just : node0).

Any comment would be very helpful.

Alex


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