From: Dave Jones <davej@codemonkey.org.uk>
To: Christopher Meredith <theophile@saintmail.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: PowerNow!, cpufreq, and swsusp
Date: Wed, 12 Mar 2003 17:40:01 -0100 [thread overview]
Message-ID: <20030312183954.GA13653@suse.de> (raw)
In-Reply-To: <3e6f6919.1546.10699@saintmail.net>
On Wed, Mar 12, 2003 at 12:06:33PM -0500, Christopher Meredith wrote:
> Also, cpufreq doesn't seem to do anything. Should it be
> working automatically?
no.
> Even when the machine sits unattended
> for over 8 hours, the fan never turns off and the cpu
> temperature is consustently 69-70 degrees C.
The kernel doesn't define policy, but exposes the necessary
interface to userspace. There are a few folks working on
tools / scripts to adjust the speed dynamically.
look through the cpufreq mailing list archives to find them
(or google)
> What must I do here?
Read Documentation/cpu-freq/user-guide.txt
short: mount sysfs, and ..
(root@evo:cpufreq)# cd /sys/class/cpu/cpufreq/cpu0/cpufreq
(root@evo:cpufreq)# cat /proc/cpuinfo | grep MHz
cpu MHz : 1390.536
(root@evo:cpufreq)# echo powersave >scaling_governor
(root@evo:cpufreq)# cat /proc/cpuinfo | grep MHz
cpu MHz : 529.728
(root@evo:cpufreq)# echo performance >scaling_governor
Dave
next prev parent reply other threads:[~2003-03-12 17:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-12 17:06 PowerNow!, cpufreq, and swsusp Christopher Meredith
2003-03-12 18:40 ` Dave Jones [this message]
2003-03-15 12:56 ` Christopher Meredith
2003-03-13 1:31 ` Nigel Cunningham
-- strict thread matches above, loose matches on Subject: below --
2003-03-12 23:37 Christopher Meredith
2003-03-12 23:41 ` Greg KH
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