Re: [patch v7 0/21] sched: power aware scheduling

[Alex Shi]

On 04/15/2013 02:04 PM, Alex Shi wrote:
> On 04/14/2013 11:59 PM, Borislav Petkov wrote:
>> > On Sun, Apr 14, 2013 at 09:28:50AM +0800, Alex Shi wrote:
>>> >> Even some scenario the total energy cost more, at least the avg watts
>>> >> dropped in that scenarios.
>> > 
>> > Ok, what's wrong with x = 32 then? So basically if you're looking at
>> > avg watts, you don't want to have more than 16 threads, otherwise
>> > powersaving sucks on that particular uarch and platform. Can you say
>> > that for all platforms out there?
> The cpu freq boost make the avg watts higher with x = 32, and also make
> higher power efficiency. We can disable cpu freq boost for this if we
> want lower power consumption all time.
> But for my understanding, the power efficient is better way to save power.

BTW, lowest p-state, no freq boost and plus this powersaving policy will
give the lowest power consumption.

And I need to say again. the powersaving policy just effect on system
under utilisation. when system goes busy, it won't has effect.
performance oriented policy will take over balance behaviour.

-- 
Thanks Alex
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