[mvapich-discuss] Options for mpispawn

[Jonathan Perkins]

On Tue, Jun 16, 2009 at 03:17:00PM -0500, Laurence Marks wrote:
> On Tue, Jun 16, 2009 at 1:18 PM, Jonathan Perkins <
> perkinjo at cse.ohio-state.edu> wrote:
> 
> > On Tue, Jun 16, 2009 at 12:52:51PM -0500, Laurence Marks wrote:
> > > Are there any environment/startup files for mpispawn which are node
> > specific?
> >
> > Are you asking whether there are any files created by mpispawn
> > temporarily when mpispawn is invoked or are you asking whether there are
> > any options that changes the behavior of mpispawn?
>
> Here is what I would like to do, either:a) Set processor affinity off if
> mpispawn is only spawning 1 mpi (MPISPAWN_LOCAL_NPROCS=1)
> b) Set processor affinity off if mpispawn in running on a specific computer,
> e.g. by looking in /etc/mpispawn.rc or similar.

Okay, you're asking for some sort of configuration options based on
either runtime conditions or preset configuration file(s).  We don't
currently support this but can consider it for future releases.  Based
on my first glance it appears that option a) should be possible.

As you may already know, you can disable processor affinity by setting
MV2_ENABLE_AFFINITY=0 on the mpirun_rsh command line if you want to
globally disable this.  Either way, I'll discuss this with my team
members to see whether we can take these situations into account.

-- 
Jonathan Perkins
http://www.cse.ohio-state.edu/~perkinjo
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