[mpich-discuss] Latency tests on different sockets and different nodes

[Pavan Balaji]

Can you upgrade to the latest version of MPICH2?  In 1.2.1p1, the 
default mpiexec was still mpd, which is not supported anymore.

The usage of mpiexec is listed here:

http://wiki.mcs.anl.gov/mpich2/index.php/Using_the_Hydra_Process_Manager

If you don't want to upgrade the mpich2 version, you can just download 
the latest version of hydra (mpiexec) and use it with mpich2-1.2.1p1.

  -- Pavan

On 07/18/2012 08:10 AM, BAKER, MYLES D. (LARC-E302) wrote:
> Is there a way to specify which sockets and which nodes I want to run
> processes on?
>
> I have a small test file to measure latency when using message passing.
> My hostfile is setup like this:
>
> interactive_node:4
> slave_node1:4
> slave_node2:4
> slave_node3:4
> slave_node4:4
>
> If I want to instantiate two processes to run this latency testing
> program on, how can I use mpiexec to do this?
>
>  > mpiexec -l -np 2 -l latency
>
> Seems to randomly choose between available nodes. If I can use the -host
> option, but it doesn't allow me to specify specific cores. Do I need to
> change the machine/host file, or is there an additional command to help
> with this? I am using 1.2.1p1 mpiexec.
>
> Thanks,
> Myles
>
> *BAKER, MYLES D. (LARC-E302)*
> *-----------------------------------------------------
> *Mail Stop 420, B1250 R177
> myles.d.baker at nasa.gov <mailto:myles.d.baker at nasa.gov>
> LaRC Ext:  x46393
>
>
>
>
>
>
>
>
> _______________________________________________
> mpich-discuss mailing list     mpich-discuss at mcs.anl.gov
> To manage subscription options or unsubscribe:
> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
>

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