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

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Message-ID: <51913E0A.6060402@gmail.com>
Date:	Mon, 13 May 2013 12:24:58 -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 05/13/2013 12:13 PM, Toralf Förster wrote:
> On 05/13/2013 07:57 PM, Dirk Brandewie wrote:
>>      cd /sys/fs/cgroup/cpu
>>      mkdir bonic
>>      echo 400 > boinc/cpu.shares
>>      boinc &
>>      echo $! > boinc/tasks
>
> In many places of my scripts for automated testing I use currently the
> "nice -n" prefix at my ThinkPad to keep a long battery life, quiet fan,
> cool CPU. The CPU just runs with minimal frequency but will give
> med/max. power on demand.
>
> If the P-State governor will be the replacement the old behaviour -
>
> the kernel menu config says "will become the perferred ... (sic!)
> ...scaling driver for Sandy bridge processors" -
>
> is there a nifty user space tool which replaces "nice" and do all cgroup
> stuff for the user ?
>

cgexec from the libcgroup-tools package (fedora name) look like it will place
a process in a group for you.

https://wiki.archlinux.org/index.php/Cgroups

Has some useful examples.

--Dirk
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