Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: Re: [OMPI users] slowdown with infiniband and latest CentOS kernel
From: Ralph Castain (rhc_at_[hidden])
Date: 2013-12-17 11:45:38


OMPI_MCA_hwloc_base_binding_policy=core

On Dec 17, 2013, at 8:40 AM, Noam Bernstein <noam.bernstein_at_[hidden]> wrote:

> On Dec 17, 2013, at 11:04 AM, Ralph Castain <rhc_at_[hidden]> wrote:
>
>> Are you binding the procs? We don't bind by default (this will change in 1.7.4), and binding can play a significant role when comparing across kernels.
>>
>> add "--bind-to-core" to your cmd line
>
> Now that it works, is there a way to set it via an environment variable, or do I have to put it
> on the command line each time?
>
> Noam_______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users