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Subject: Re: [OMPI users] slowdown with infiniband and latest CentOS kernel
From: Dave Love (d.love_at_[hidden])
Date: 2014-03-04 05:48:30

Tru Huynh <tru_at_[hidden]> writes:

> afaik, 2.6.32-431 series is from RHEL(and clones) version >=6.5


> otoh, it might be related to

That looks likely. As we bind to cores, we wouldn't see it for MPI
processes, at least, and will see higher performance generally. (I read
or replied carelessly in thinking this was about binding, rather than a
possible scheduling issue.)

It really is time to take core binding seriously at least 15 years after
NUMA became significant.