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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


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?


DTU Computing Center
Technical University of Denmark