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Subject: Re: [OMPI devel] 0.9.1rc2 is available
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2009-10-22 09:52:03


I added tickets #21 and #22 about these features.

     https://svn.open-mpi.org/trac/hwloc/ticket/21
     https://svn.open-mpi.org/trac/hwloc/ticket/22

Thanks!

On Oct 22, 2009, at 5:54 AM, Ashley Pittman wrote:

> On Thu, 2009-10-22 at 11:05 +0200, Brice Goglin wrote:
> > Ashley Pittman wrote:
>
> > > Does this imply the default is to report on processes in the
> current
> > > cpuset rather than the entire system? Does anyone else feel that
> > > violates the principal of least surprise?
>
> > Yes, by default, it's the current cpuset. Maybe lstopo should
> report the
> > whole system (it does if you pass --whole-system), or display a
> clear
> > message saying that's it's only showing the current cpuset. Apart
> from
> > lstopo, for real applications, I feel like using the current
> cpuset only
> > is better.
>
> I guess 95% of the time you run it by hand you won't have a cpuset so
> it'll be the same anyway and when you do have a cpuset then it's
> probably what you are interested in.
>
> Could I add a feature request that you can query the topology for
> other
> arbitrary processes in the system? I've taken a look at the source
> and
> it appears I could add this for Linux easily enough (I assume I could
> just change /proc/self/ in src/topology-linux.c:1005?) but doing the
> same for other operating systems isn't something I could do.
>
> It would be a two minute job to add this to padb which would allow you
> to see the topology of all processes within a parallel job at run-time
> without needing to interrupt the job.
>
> Ashley,
>
> --
>
> Ashley Pittman, Bath, UK.
>
> Padb - A parallel job inspection tool for cluster computing
> http://padb.pittman.org.uk
>
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>

-- 
Jeff Squyres
jsquyres_at_[hidden]