From owner-freebsd-hackers@FreeBSD.ORG  Mon May  5 10:09:17 2014
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Date: Mon, 05 May 2014 12:09:02 +0200
From: Stefan Esser <se@freebsd.org>
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Subject: Re: Leaving the Desktop Market
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Cc: Matthias Apitz <guru@unixarea.de>
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Am 05.05.2014 11:17, schrieb Matthias Apitz:
> El día Saturday, May 03, 2014 a las 04:59:48PM -0700, Kevin Oberman escribió:
> 
>> Available is not required. Set it to C8. That guarantees that you will use
>> the lowest available. The correct incantation in rc.conf is "Cmax".
>> performance_cx_lowest="Cmax"
>> economy_cx_lowest="Cmax"
>>
>> But, unless you want laggy performance, you will probably also want:
>> hint.p4tcc.0.disabled=1
>> hint.acpi_throttle.0.disabled=1
>> in /boot/loader.conf. Low Cx states and TCC/throttling simply don't mix
>> well and TCC is not effective, as mentioned earlier in this thread.
> 
> In the output of:
> 
> $ sysctl -a | fgrep dev.cpu.0.freq_
> dev.cpu.0.freq_levels: 1600/2000 1333/1533 1066/1066 800/600
> 
> what does mean the value after the slash .../nnnn ?

This is the nominal power consumption (TDP) in mW for that level.
These numbers correspond to 2W at 1600MHz and 0.6W at 800MHz.

Is this an Atom or some other ultra-low power CPU?

Regards, STefan