CPU Turbo mode

Adrian Chadd adrian at freebsd.org
Sat Nov 9 09:25:40 UTC 2013

On 8 November 2013 16:08, Warren Block <wblock at wonkity.com> wrote:

> When it shows 2201, it's in Turbo mode.  I don't know if there is anywhere
> that shows the actual speed of the single core that is going faster.

I enabled this on a 4-core sandy bridge (E3-1260L IIRC) and all four
cores suddenly grew a few % more clock cycles. But, it was on a server
whose fans are cranked high anyway, so the CPU temperature only grew a
degree or two.

I think Turbo Boost is boosting all cores that have work on it; it's
up to the thread/process scheduler to keep the thermal envelope such
that the overclocking works.


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