From: Paolo Ornati <ornati@fastwebnet.it>
To: "Francis Moreau" <francis.moro@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Slower CPU frequency reported by the kernel
Date: Fri, 2 Feb 2007 15:33:27 +0100 [thread overview]
Message-ID: <20070202153327.1a06cffd@localhost> (raw)
In-Reply-To: <38b2ab8a0702020603h480fc1dfm22267089341cbe0e@mail.gmail.com>
On Fri, 2 Feb 2007 15:03:31 +0100
"Francis Moreau" <francis.moro@gmail.com> wrote:
> it's seems that the cpu freq scaling depends on a user space tool.
Yes, it depends on the selected governor.
In the case of "userspace" governor you (or a program) can set the speed
writing to "/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed".
Usually a deamon monitor the CPU usage and increase the frequency when
you need it.
> Could you tell me how I can find if there're such tools installed on
> my computer ?
"ps -A" and look for something like "cpufreqd"
There are different deamon for this: cpufreqd, cpudyn...
Anyway it is started by an init script, so you should find it looking
at "ls /etc/init.d/".
--
Paolo Ornati
Linux 2.6.20-rc7 on x86_64
next prev parent reply other threads:[~2007-02-02 14:33 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-02 11:11 Slower CPU frequency reported by the kernel Francis Moreau
2007-02-02 12:04 ` Paolo Ornati
2007-02-02 13:14 ` Jesper Juhl
2007-02-02 13:48 ` Francis Moreau
2007-02-02 14:03 ` Francis Moreau
2007-02-02 14:20 ` Arjan van de Ven
2007-02-02 15:27 ` Francis Moreau
2007-02-02 14:33 ` Paolo Ornati [this message]
2007-02-02 15:31 ` Francis Moreau
2007-02-03 12:19 ` lnx.tmp
2007-02-03 12:42 ` Di, Wu
2007-02-06 18:38 ` Langsdorf, Mark
2007-02-07 10:40 ` Andi Kleen
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