On 4/25/2012 1:00 PM, Jeff Squyres wrote:
On Apr 25, 2012, at 12:51 PM, Ralph Castain wrote:
Sounds rather bizarre. Do you have lstopo on your machine? Might be useful to
see the output of that so we can understand what it thinks the topology is like
as this underpins the binding code.
The
On Apr 25, 2012, at 12:51 PM, Ralph Castain wrote:
> Sounds rather bizarre. Do you have lstopo on your machine? Might be useful to
> see the output of that so we can understand what it thinks the topology is
> like as this underpins the binding code.
>
> The -nooversubscribe option is a red her
Sounds rather bizarre. Do you have lstopo on your machine? Might be useful to
see the output of that so we can understand what it thinks the topology is like
as this underpins the binding code.
The -nooversubscribe option is a red herring here - it has nothing to do with
the problem, nor will i
>I just re-read the thread. I think there's a little confusion between the
terms "processor" and "MPI process" here. You said "As a pre-processing
step, each processor must figure out which other processors it must
communicate with by virtue of sharing neighboring grid points." Did you
mean "MPI pr
I just re-read the thread.
I think there's a little confusion between the terms "processor" and "MPI
process" here.
You said "As a pre-processing step, each processor must figure out which other
processors it must communicate with by virtue of sharing neighboring grid
points."
Did you mean
> Any chance you could upgrade to Open MPI 1.5.5? It has a better version
of the processor affinity stuff than the 1.4 series.
Did this and recompiled everything that depended on OMPI. No difference
whatsoever. It still tells me, if I specify -np 2 for example, that "There
are not enough slots ava
is some run time option I'm not setting properly, etc.
>
> Thanks
>
> Kyle
>
> On Tue, Apr 24, 2012 at 4:15 PM, wrote:
> From: Ralph Castain
> Subject: Re: [OMPI users] MPI doesn't recognize multiple cores
>available onmulticore machines
>
Any chance you could upgrade to Open MPI 1.5.5? It has a better version of the
processor affinity stuff than the 1.4 series.
On Apr 25, 2012, at 10:35 AM, Kyle Boe wrote:
> I tried this and got the same result. Any other thing I might be missing...?
>
> >Did you tell it --bind-to-core? If not
I tried this and got the same result. Any other thing I might be missing...?
>Did you tell it --bind-to-core? If not, then the procs would be unbound to
any particular core - so your code might well think they are "sharing"
cores.
d
> correctly, or there is some run time option I'm not setting properly, etc.
>
> Thanks
>
> Kyle
>
> On Tue, Apr 24, 2012 at 4:15 PM, wrote:
> From: Ralph Castain
> Subject: Re: [OMPI users] MPI doesn't recognize multiple cores
>available onmult
ething not configured correctly, or there is some run time option
I'm not setting properly, etc.
Thanks
Kyle
On Tue, Apr 24, 2012 at 4:15 PM, wrote:
> From: Ralph Castain
> Subject: Re: [OMPI users] MPI doesn't recognize multiple cores
> available onmulticore machines
&g
You don't need a hostfile to run multiple procs on the localhost.
What version of OMPI are you using? What was the original issue?
On Apr 24, 2012, at 4:07 PM, Jingcha Joba wrote:
> Try using slots in hostfile ?
>
> --
> Sent from my iPhone
>
> On Apr 24, 2012, at 2:52 PM, Kyle Boe wrote:
>
Try using slots in hostfile ?
--
Sent from my iPhone
On Apr 24, 2012, at 2:52 PM, Kyle Boe wrote:
> I'm having a problem trying to use OpenMPI on some multicore machines I have.
> The code I am running was giving me errors which suggested that MPI was
> assigning multiple processes to the sam
I'm having a problem trying to use OpenMPI on some multicore machines I
have. The code I am running was giving me errors which suggested that MPI
was assigning multiple processes to the same core (which I do not want).
So, I tried launching my job using the -nooversubscribe option, and I get
this e
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