Frequency scaling survey

[Knapp]

On Thu, Nov 20, 2008 at 8:18 AM, Slim Joe <slimjoe2k8 at gmail.com> wrote:
> 2008/11/19, Owen Townend <owen.townend at gmail.com>:
>
> Thanks again to all the replied.
>
> [...]
>
>> Work comp:
>>
>> % cat /proc/cpuinfo | grep 'model name'
>> model name      : Intel(R) Core(TM)2 Duo CPU     E8400  @ 3.00GHz
>> model name      : Intel(R) Core(TM)2 Duo CPU     E8400  @ 3.00GHz
>> % cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_frequencies
>> 3000000 2667000 2333000 2000000
>> 3000000 2667000 2333000 2000000
>
> The results look strange. Does this mean that you can't throttle the
> E8400 to less than 2GHz?
>
>> Mythbox:
>>
>> % cat /proc/cpuinfo | grep 'model name'
>> model name      : AMD Athlon(tm) Dual Core Processor 4850e
>> model name      : AMD Athlon(tm) Dual Core Processor 4850e
>> % cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_frequencies
>> 2500000 2400000 2200000 2000000 1800000 1000000
>> 2500000 2400000 2200000 2000000 1800000 1000000
>>
>> The 4850e has only a 45W envelope.. so except against the mobile procs
>> it will probably be ahead in the 'most efficient at doing nothing'
>> category.  Especially against my home desktop's Phenom 9600 (125W
>> proc, not powered on at the moment).
>
> I know xHz isn't everything when it comes to performance or power saving.
> However, I was hoping to get results from a processor that can reduce its
> speed down to Pentium II levels. I remember reading an article on FreeBSD
> that shows the list of available frequencies going all the way down to
> ~300MHz.

Long time ago I read something about changing the frequency scaling by
hand. You might want to google into that.



-- 
Douglas E Knapp

http://sf-journey-creations.wikispot.org/Front_Page