mpiexec problem.

[Pete Wyckoff]

csamuel at vpac.org wrote on Thu, 21 Jun 2007 11:52 +1000:
> On Thu, 21 Jun 2007, Steve Young wrote:
> > The osc mpiexec spawns 8 seperate processes while mpirun does them in
> > parallel. Any ideas what I could try to remedy this? Thanks,
> 
> If you are not using Myrinet (and have not altered the build time default) 
> then you will need to specify the correct MPICH communication lib to use.
> 
> Quoting the manual page:
> 
>        -comm type
[..]
> What you see is often diagnostic of someone using the default MPICH-GM support 
> for a P4 application.

Yeah.  The magic configure option is "--with-default-comm=mpich2".
If you have ideas about how to fix the documentation to make this
stand out better, please let us know.

		-- Pete