Open MPI logo

Hardware Locality Development Mailing List Archives

  |   Home   |   Support   |   FAQ   |  

This web mail archive is frozen.

This page is part of a frozen web archive of this mailing list.

You can still navigate around this archive, but know that no new mails have been added to it since July of 2016.

Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.

Subject: [hwloc-devel] BGQ empty topology with MPI
From: Daniel Ibanez (dan.a.ibanez_at_[hidden])
Date: 2012-03-20 22:37:01


Hello,

I am trying out hwloc on a very early access Blue Gene /Q system.
I've built hwloc from source and am running test programs that use it.
The most serious issue I'm observing is that when MPI and hwloc
are used in the same program, hwloc aborts with "Topology became empty,
aborting!".
This does not happen when only hwloc calls are made in the program:
then the topology can see all 64 PUs.

Please let me know if theres a hint of what could be causing it,
where to post, and what info to provide.

Thanks,

-- 
Dan Ibanez