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Subject: Re: [OMPI users] slowdown with infiniband and latest CentOS kernel
From: Noam Bernstein (noam.bernstein_at_[hidden])
Date: 2013-12-17 11:39:43


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

Yeay - it works. Thank you very much for the help. I guess something must have
changed with the default binding for new kernel + 1.7.3.

                                                                                                        Noam


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