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Subject: Re: [OMPI devel] OMPI 1.6 affinity fixes: PLEASE TEST
From: Mike Dubman (mike.ompi_at_[hidden])
Date: 2012-05-30 13:58:46


no cgroups or cpusets.

On Wed, May 30, 2012 at 4:59 PM, Jeff Squyres <jsquyres_at_[hidden]> wrote:

> On May 30, 2012, at 9:47 AM, Mike Dubman wrote:
>
> > ohh.. you are right, false alarm :) sorry siblings != cores - so it is HT
>
> OMPI 1.6.soon-to-be-1 should handle HT properly, meaning that it will bind
> to all the HT's in a core and/or socket.
>
> Are you using Linux cgroups/cpusets to restrict available cores? Because
> Brice is saying that E5-2650 is supposed to have more cores.
>
>
> > On Wed, May 30, 2012 at 4:36 PM, Brice Goglin <Brice.Goglin_at_[hidden]>
> wrote:
> > Your /proc/cpuinfo output (filtered below) looks like only two sockets
> (physical ids 0 and 1), with one core each (cpu cores=1, core id=0), with
> hyperthreading (siblings=2). So lstopo looks good.
> > E5-2650 is supposed to have 8 cores. I assume you use Linux
> cgroups/cpusets to restrict the available cores. The missconfiguration may
> be there.
> > Brice
> >
> >
> >
> >
> > Le 30/05/2012 15:14, Mike Dubman a écrit :
> >> or, lstopo lies (Im not using the latest hwloc but one which comes with
> distro).
> >> The machine has two dual-code sockets, total 4 physical cores:
> >> processor : 0
> >>
> >> physical id : 0
> >> siblings : 2
> >> core id : 0
> >> cpu cores : 1
> >>
> >> processor : 1
> >>
> >> physical id : 1
> >> siblings : 2
> >> core id : 0
> >> cpu cores : 1
> >>
> >> processor : 2
> >>
> >> physical id : 0
> >> siblings : 2
> >> core id : 0
> >> cpu cores : 1
> >>
> >> processor : 3
> >>
> >> physical id : 1
> >> siblings : 2
> >> core id : 0
> >> cpu cores : 1
> >>
> >>
> >>
> >> On Wed, May 30, 2012 at 3:40 PM, Ralph Castain <rhc_at_[hidden]>
> wrote:
> >> Hmmm...well, from what I see, mpirun was actually giving you the right
> answer! I only see TWO cores on each node, yet you told it to bind FOUR
> processes on each node, each proc to be bound to a unique core.
> >>
> >> The error message was correct - there are not enough cores on those
> nodes to do what you requested.
> >>
> >>
> >> On May 30, 2012, at 6:19 AM, Mike Dubman wrote:
> >>
> >>> attached.
> >>>
> >>> On Wed, May 30, 2012 at 2:32 PM, Jeff Squyres <jsquyres_at_[hidden]>
> wrote:
> >>> On May 30, 2012, at 7:20 AM, Jeff Squyres wrote:
> >>>
> >>> >> $hwloc-ls --of console
> >>> >> Machine (32GB)
> >>> >> NUMANode L#0 (P#0 16GB) + Socket L#0 + L3 L#0 (20MB) + L2 L#0
> (256KB) + L1 L#0 (32KB) + Core L#0
> >>> >> PU L#0 (P#0)
> >>> >> PU L#1 (P#2)
> >>> >> NUMANode L#1 (P#1 16GB) + Socket L#1 + L3 L#1 (20MB) + L2 L#1
> (256KB) + L1 L#1 (32KB) + Core L#1
> >>> >> PU L#2 (P#1)
> >>> >> PU L#3 (P#3)
> >>> >
> >>> > Is this hwloc output exactly the same on both nodes?
> >>>
> >>>
> >>> More specifically, can you send the lstopo xml output from each of the
> 2 nodes you ran on?
> >>>
> >>> --
> >>> Jeff Squyres
> >>> jsquyres_at_[hidden]
> >>> For corporate legal information go to:
> http://www.cisco.com/web/about/doing_business/legal/cri/
> >>>
> >>>
> >>> _______________________________________________
> >>> devel mailing list
> >>> devel_at_[hidden]
> >>> http://www.open-mpi.org/mailman/listinfo.cgi/devel
> >>>
> >>> <lstopo-out.tbz>_______________________________________________
> >>>
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> >>> devel_at_[hidden]
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> >>
> >>
> >> _______________________________________________
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> >>
> >>
> >>
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> >
> >
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>
> --
> Jeff Squyres
> jsquyres_at_[hidden]
> For corporate legal information go to:
> http://www.cisco.com/web/about/doing_business/legal/cri/
>
>
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