Open MPI logo

Hardware Locality Users' Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Hardware Locality Users mailing list

Subject: Re: [hwloc-users] BGQ question.
From: Chris Samuel (samuel_at_[hidden])
Date: 2014-03-25 09:27:43


On Tue, 25 Mar 2014 08:22:51 AM Jeff Hammond wrote:

> I am inclined to think the issue us that ion Linux uses only 16 cores. When
> hwloc does n-- for CNK to skip the 17th (OS) core, it gets the wrong answer
> for Linux.

Not here, it exposes all 17 cores on our BG/Q IO nodes.

I wonder if it's something that got changed in V1R2M1 from V1R2M0?

[...]
> I'm not sure hwloc on BGQ ion ion needs and special hook either. Isn't Linux
> PPC support enough?

I'd have thought that'd be the case.

cheers!
Chris

-- 
 Christopher Samuel        Senior Systems Administrator
 VLSCI - Victorian Life Sciences Computation Initiative
 Email: samuel_at_[hidden] Phone: +61 (0)3 903 55545
 http://www.vlsci.org.au/      http://twitter.com/vlsci