Users
Subject: Re: [OMPI users] openmpi single node jobs using btl openib
Hi Gilles,
- btl/vader has a higher exclusivity than btl/sm, so bottom line, vader should
be used instead of sm
Yes, I believe vader is being used in our case. I should say self,vader in my
previous posts.
- is your
with-cma
> >
> > So the question remains why OpenMPI choose openib over self,sm for single
> > node jobs? Isn't there a mechanism to differentiate btl networks for
> > single/multi-node jobs?
> >
> > Thanks,
> > Jingchao
> > From: users on
:* Tuesday, February 7, 2017 2:14:40 PM
*To:* Open MPI User's List
*Subject:* Re: [OMPI users] openmpi single node jobs using btl openib
Can you try upgrading to Open MPI v2.0.2? We just released that last
week with a bunch of bug fixes.
> On Feb 7, 2017, at 3:07 PM, Jingchao Zhan
,
Jingchao
From: users on behalf of Jeff Squyres
(jsquyres)
Sent: Tuesday, February 7, 2017 2:14:40 PM
To: Open MPI User's List
Subject: Re: [OMPI users] openmpi single node jobs using btl openib
Can you try upgrading to Open MPI v2.0.2? We just released that
Jingchao
> From: users on behalf of Tobias Kloeffel
>
> Sent: Tuesday, February 7, 2017 2:54:46 AM
> To: Open MPI Users
> Subject: Re: [OMPI users] openmpi single node jobs using btl openib
>
> Hello Jingchao,
> try to use -mca mpi_leave_pinned 0, also for multinode jobs.
&
jobs?
Thanks,
Jingchao
From: users on behalf of Tobias Kloeffel
Sent: Tuesday, February 7, 2017 2:54:46 AM
To: Open MPI Users
Subject: Re: [OMPI users] openmpi single node jobs using btl openib
Hello Jingchao,
try to use -mca mpi_leave_pinned 0, also for multinode jo
Hello Jingchao,
try to use -mca mpi_leave_pinned 0, also for multinode jobs.
kind regards,
Tobias Klöffel
On 02/06/2017 09:38 PM, Jingchao Zhang wrote:
Hi,
We recently noticed openmpi is using btl openib over self,sm for
single node jobs, which has caused performance degradation for some
a
Hi,
We recently noticed openmpi is using btl openib over self,sm for single node
jobs, which has caused performance degradation for some applications, e.g.
'cp2k'. For opempi version 2.0.1, our test shows single node 'cp2k' job using
openib is ~25% slower than using self,sm. We advise users do