linux-kernel - Re: 3.9.0 + CONFIG_X86_INTEL_PSTATE=y -> ThinkPad T420 with i5 lost ACPI functionality

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Message-ID: <51842F6F.1050005@intel.com>
Date:	Fri, 03 May 2013 14:43:11 -0700
From:	Dirk Brandewie <dirk.brandewie@...il.com>
To:	Toralf Förster <toralf.foerster@....de>
CC:	Dirk Brandewie <dirk.brandewie@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-acpi@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: 3.9.0 + CONFIG_X86_INTEL_PSTATE=y  -> ThinkPad T420 with i5 lost
 ACPI functionality

On 05/03/2013 02:26 PM, Toralf Förster wrote:
> On 05/03/2013 11:10 PM, Dirk Brandewie wrote:
>>
>> ignore_nice_load is a feature of the ondemand governor.
>> The intel_pstate driver is seeing the load presented by the BOINC client
>> and is adjusting the pstate accordingly.
>
> Is the intel_pstate driver a choice for a notebook and friends where a
> grid software is running as a low-prio back ground job ?
>

Probably not.

> Because the CPU will be running mostly at high(er) frequency - which
> always results in a high temperature and short battery time.
>

It would be better IMHO if the client software limited the resources
it uses when the system is not on wall power but that is a seperate
discussion :-)

--Dirk

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