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Date: Thu, 10 Jul 2014 11:44:14 +0400
From: Alexander Volkov <vaa@altlinux.org>
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Subject: Re: [sisyphus] cpufreq-simple
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On 2014-07-10 11:09:50 +0400, Anton Farygin wrote:
AF> On 10.07.2014 09:45, Alexander Volkov wrote:
AF> >On 2014-07-09 18:21:40 +0300, Michael Shigorin wrote:
AF> >MS> On Wed, Jul 09, 2014 at 03:14:22PM +0400, Alexander Volkov wrote:
AF> >MS> > Вопрос по настройке частоты проца - 
AF> >установил cpufreq-simple,
AF> >MS> > но он не может рулить - нет доступа в 
AF> >/sys.
AF> >MS> > Модуль ядра загрузился.  Это где 
AF> >собака порылась?
AF> >
AF> >MS> Что за процессор и что в dmesg | grep pstate ?
AF> >model name      : Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
AF> >[    0.359728] Intel pstate controlling: cpu 0
AF> >[    0.359736] Intel pstate controlling: cpu 1
AF> >[    0.359747] Intel pstate controlling: cpu 2
AF> >[    0.359754] Intel pstate controlling: cpu 3
AF> >Поставил powersave, сделало вид, что 
AF> >применилось, однако:
AF> >cpupower frequency-info
AF> >analyzing CPU 0:
AF> >   driver: intel_pstate
AF> >   CPUs which run at the same hardware frequency: 0
AF> >   CPUs which need to have their frequency coordinated by software: 0
AF> >    maximum transition latency: 0.97 ms.
AF> >   hardware limits: 800 MHz - 3.60 GHz
AF> >    available cpufreq governors: performance, powersave
AF> >    current policy: frequency should be within 800 MHz and 3.60	  
AF> >    GHz.
AF> >   The governor "powersave" may decide which	speed to use
AF> >   within this range.
AF> >   current CPU frequency is 3.20 GHz (asserted by call to hardware).
AF> >   boost state support:
AF> >     Supported: yes
AF> >     Active: yes
AF> 
AF> Добавьте параметр ядру intel_pstate=disable
AF> 
AF> перезагрузитесь и посмотрим результат.
AF> 
О, помогло:
current CPU frequency is 800 MHz (asserted by call to hardware)

--
 Regards, Alexander