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Subject: Re: [hwloc-users] Solaris and hwloc
From: Samuel Thibault (samuel.thibault_at_[hidden])
Date: 2012-09-12 18:42:07

Jeff Squyres, le Thu 13 Sep 2012 00:25:24 +0200, a écrit :
> On Sep 12, 2012, at 10:28 AM, Samuel Thibault wrote:
> >> He seems to get an hwloc error any time he tries to bind to more than 1 PU. Is that expected on Solaris?
> >
> > Without lgrp support, unfortunately yes: the processor_bind solaris interface only permits to bind to one processor.
> >
> > With lgrp support, on should be able to bind oneself to sets of whole
> > NUMA nodes. I don't know any interface which would provide a granularity
> > between one processor and one NUMA node.
> Ah. So -- for Open MPI on Solaris using hwloc, all we can do is bind to 1 PU at a time. I suppose we should release-note that...
> (Sorry Siegmar! :-( )
> And just so I understand -- we don't have lgrp support in hwloc, mainly because no one had the cycles/interest to implement it. Is that correct?

No, we have it, but not all solaris systems have it.