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Subject: Re: [OMPI devel] RFC: changes to modex
From: Gleb Natapov (glebn_at_[hidden])
Date: 2008-04-02 13:58:22

On Wed, Apr 02, 2008 at 12:08:47PM -0400, Jeff Squyres wrote:
> On Apr 2, 2008, at 11:13 AM, Gleb Natapov wrote:
> > On Wed, Apr 02, 2008 at 10:35:03AM -0400, Jeff Squyres wrote:
> >> If we use carto to limit hcas/ports are used on a given host on a
> >> per-
> >> proc basis, then we can include some proc_send data to say "this proc
> >> only uses indexes X,Y,Z from the node data". The indexes can be
> >> either uint8_ts, or maybe even a variable length bitmap.
> >>
> > So you propose that each proc will send info (using node_send())
> > about every
> > hca/proc on a host even about those that are excluded from use by
> > the proc
> > just in case? And then each proc will have to send additional info
> > (using
> > proc_send() this time) to indicate what hcas/ports it is actually
> > using?
> No, I think it would be fine to only send the output after
> btl_openib_if_in|exclude is applied. Perhaps we need an MCA param to
> say "always send everything" in the case that someone applies a non-
> homogeneous if_in|exclude set of values...?
> When is carto stuff applied? Is that what you're really asking about?
There is no difference between carto and include/exclude. I can specify
different openib_if_include values for different procs on the same host.