Dear all,
Thank you for your information.
From: [EMAIL PROTECTED]
Subject: Re: Pentium 3 Clock Frequency Control
Date: Sun, 28 Jan 2007 00:14:54 +0500
Message-ID: [EMAIL PROTECTED]
applecom FK [EMAIL PROTECTED] wrote:
applecom
applecom Is it posible to control Pentium 3 clock frequency on FreeBSD?
applecom The purpose is to reduce the power consumption and lengthen battery
applecom life.
applecom In addition, how can we know what speed of cpu clock frequecy a cpu
applecom supports and what speed a cpu take at any given time? I suppose
applecom that a command which returns each information exist.
applecom Well, a couple years ago I patched to, if I remember correctly,
applecom 5.4 kernel and it made this need possible at least on Pentium M.
applecom I tried to find the web page but I failed.
applecom I am using FreeBSD6.0-RELEASE now.
applecom
applecom Look at
applecom http://lists.freebsd.org/pipermail/freebsd-acpi/2005-March/001346.html
applecom Hope it helps.
I thought cpufreq.ko is a driver for cpu frequecy control,
as its man page says. I loaded it to the kernel, with nothing changed
like below.
The output of my sysctl is differen from the website you showed me. The
sysctl of his mentioned acpi, which I disabled. I chose apm, because
it turned off the TFT backlight, which acpi failed. TFT backlight off
is also critical for the power-saving.
Any suggetions?
Still, I would like to know what cpu the cpufreq.ko supports. Its man
page does not say anything. And I would like to know whether we have
any other drivers on which this function is implemented.
--
FK.
-- Quoted from Man --
DESCRIPTION
The cpufreq driver provides a unified kernel and user interface to CPU
frequency control drivers. It combines multiple drivers offering differ-
ent settings into a single interface of all possible levels. Users can
access this interface directly via sysctl(8) or by indicating to
/etc/rc.d/power_profile that it should switch settings when the AC line
state changes via rc.conf(5).
-- End of quatation --
sysctl dev.cpu
dev.cpu.0.%driver: cpu
dev.cpu.0.%parent: legacy0
sysctl dev | grep apm
dev.apm.0.%desc: APM BIOS
dev.apm.0.%driver: apm
dev.apm.0.%parent: legacy0
kldstat
Id Refs AddressSize Name
1 12 0xc040 3d5e94 kernel
21 0xc07d6000 51f8 snd_t4dwave.ko
32 0xc07dc000 1d9c8sound.ko
41 0xc07fa000 57ac apm.ko
52 0xc15d7000 c000 ipfw.ko
61 0xc15e5000 4000 ipdivert.ko
71 0xc163b000 4000 logo_saver.ko
81 0xc1643000 15000linux.ko
91 0xc2011000 8000 cpufreq.ko
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