[Beowulf] frequency scaling

Mahmood Sayed mahmood.sayed at gmail.com
Mon Sep 21 06:18:39 PDT 2015

Nuke it from the bios. It's the only way to be sure. 

Mahmood Sayed
HPC Admin, NIEHS  

> On Sep 21, 2015, at 8:27 AM, Michael Di Domenico <mdidomenico4 at gmail.com> wrote:
> What steps are generally taken to remove frequency scaling from a box?
> I'm curious if there's something above and beyond (from the linux
> side), more then echo'ing performance into the governors and disabling
> cpuspeed/kondemand
> i did those and i see the freq locked in /proc/cpuinfo and /sys
> entries, but when i run cpufreq-aperf, it looks like the cpu's are
> still scaling (presumably voltage scaling).
> These are sandy bridge processors and I'm wondering if a trigger in
> the bios is only way to remove the scaling.
> any thoughts?
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