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Subject: Re: [hwloc-users] BGQ question.
From: Brice Goglin (Brice.Goglin_at_[hidden])
Date: 2014-03-26 02:57:06


Le 26/03/2014 01:00, Christopher Samuel a écrit :
> On 26/03/14 01:34, Biddiscombe, John A. wrote:
>
> > If I compile on the login node, but run lstopo on the ION, I get
> > this (wrong, below)
>
> If you build this with GCC (the standard system one, not the
> cross-compiler for BGQ) does it still get it wrong?
>
> My suspicion is that the hwloc BGQ backend is designed to fill in
> information for code running under the CNK which would otherwise be
> discoverable under Linux.
>
> I'm not sure it's a good idea to try and use it under RHEL.

If you do so, the BGQ backend disables itself by default because it
doesn't find the right CNK uname info. It falls back to other backends,
Linux here. But you can force the BGQ backend with an env var if really
needed.

Brice