On Tue, Mar 6, 2012 at 7:28 AM, Dave Love <d.l...@liverpool.ac.uk> wrote:
> Could someone confirm whether this is a bug or misunderstanding the doc > (in which case it's not just me, and it needs clarifying!)? I haven't > looked at the current code in the hope of a quick authoritative answer. > > This is with 1.5.5rc3, originally on Interlagos, but also checked on > Magny Cours. It's also seen on two Interlagos with different physical > numbering of the logical processors. > > On a 48-core Magny Cours with > > mpirun --bysocket --bind-to-core --report-bindings -np 48 > > what I get is two processes per core, e.g.: > > [node247:09521] [[58099,0],0] odls:default:fork binding child > [[58099,1],14] to socket 2 cpus 4000 > ... > [node247:09521] [[58099,0],0] odls:default:fork binding child > [[58099,1],38] to socket 2 cpus 4000 > > and hwloc-ps confirms the situation. However, I (and my boss, who did > it originally) expect one per core. With --bycore we do see one per > core, of course. > > Is that actually expected? > Well, no - it shouldn't do that, so I would expect it is a bug. Will try to look at it, but probably won't happen until next week due to travel. > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
