Intel Turbo Boost and core parking

[Matthew Galgoci]

> Date: Thu, 9 Jun 2011 14:42:14 +0200
> From: Kenneth Holter <kenneho.ndu at gmail.com>
> Reply-To: redhat-sysadmin-list at redhat.com
> To: redhat-sysadmin-list at redhat.com
> Subject: Intel Turbo Boost and core parking
>
> Hi all,
>
>
> I've get a few servers with Xeon based CPUs, which implements the
> Intel Turbo boost technology. We're looking into whether we've got
> workloads that would benefit from utilizing this dynamic overclocking
> feature.
>
> In order to get the full effect from using this technology, we need to
> find a way to consolidate the workload onto a few CPU cores as
> possible. Processor affinity is one way of achieving this, but it's
> not very flexible. Core parking on the other hand seems to be the way
> to go. After doing some quick googling I've not yet come across
> information on how core parking plays together with linux (especially
> RHEL). Does anyone know if core parking is supported yet, and if so
> how to enable it and so forth?
>
> Best regards,
> Kenneth Holter

Have a look at numactl and cpuset.

-- 
Matthew Galgoci
Network Operations
Red Hat, Inc
919.754.3700 x44155
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"It's not whether you get knocked down, it's whether you get up." - Vince Lombardi