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Subject: Re: [OMPI users] How do I run OpenMPI safely on a Nehalem standalone machine?
From: Terry Frankcombe (terry_at_[hidden])
Date: 2010-05-09 23:45:21


> I don't know what Jeff meant by that, but we haven't seen a feasible way
> of disabling HT without rebooting and using the BIOS options.

According to this page:
http://dag.wieers.com/blog/is-hyper-threading-enabled-on-a-linux-system
in RHEL5/CentOS-5 it's easy to switch it on and off on the fly. No
wizardry required.

(Disclaimer: I neither run RHEL nor bugger about with HT.)