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Subject: Re: [OMPI users] slowdown with infiniband and latest CentOS kernel
From: Bernd Dammann (bd_at_[hidden])
Date: 2014-02-26 10:55:05


Hi,

I found this thread from before Christmas, and I wondered what the
status of this problem is. We experience the same problems since our
upgrade to Scientific Linux 6.4, kernel 2.6.32-431.1.2.el6.x86_64, and
OpenMPI 1.6.5.

Users have reported severe slowdowns in all kinds of applications, like
VASP, OpenFOAM, etc.

Using the workaround '--bind-to-core' does only make sense for those
jobs, that allocate full nodes, but the majority of our jobs don't do that.

Is there any news on this issue?

Regards,
Bernd

--
DTU Computing Center
Technical University of Denmark