Scaling governor via sysctl?
in [Debian]
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From: Todd A. Jacobs on 28 Jan 2010 00:10 On Wed, Jan 27, 2010 at 08:42:13PM -0800, Todd A. Jacobs wrote: > I get nothing. Why can I write to a value in sysfs that can't be > accessed with sysctl? And more importantly, how am I supposed to do this > at boot without sysctl.conf? Two quick answers, but a remaining question. The default governor can be set in /etc/default/cpufrequtils, and can be changed with: sudo cpufreq-set -g ondemand which probably just does the same thing as echoing to the right key in sysfs. However, I still don't understand why I can't set it with sysctl. What's up with that? -- "Oh, look: rocks!" -- Doctor Who, "Destiny of the Daleks" -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Tilo Schwarz on 28 Jan 2010 16:20 On Thu, 28 Jan 2010 05:42:13 +0100, Todd A. Jacobs <nospam(a)codegnome.org> wrote: > I'd like to set my scaling governor in /etc/sysctl.conf, rather than by > echoing a value to: > > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor > > However, I'm not finding a key for it via the sysctl utility. When I > run: > > sysctl -a | fgrep -i cpu > > I get nothing. Why can I write to a value in sysfs that can't be > accessed with sysctl? And more importantly, how am I supposed to do this > at boot without sysctl.conf? > I use sysfs.conf: #grep demand /etc/sysfs.conf devices/system/cpu/cpu0/cpufreq/scaling_governor = ondemand -- Regards, Tilo -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Carl Johnson on 29 Jan 2010 17:40 "Tilo Schwarz" <tilo(a)tilo-schwarz.de> writes: > On Thu, 28 Jan 2010 05:42:13 +0100, Todd A. Jacobs > <nospam(a)codegnome.org> wrote: > >> I'd like to set my scaling governor in /etc/sysctl.conf, rather than by >> echoing a value to: >> >> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor >> >> However, I'm not finding a key for it via the sysctl utility. When I >> run: >> >> sysctl -a | fgrep -i cpu >> >> I get nothing. Why can I write to a value in sysfs that can't be >> accessed with sysctl? And more importantly, how am I supposed to do this >> at boot without sysctl.conf? >> > > I use sysfs.conf: > > #grep demand /etc/sysfs.conf > devices/system/cpu/cpu0/cpufreq/scaling_governor = ondemand If you have the cpufrequtils package installed, then just edit /etc/defaults/cpufrequtils to specify which you want at boot. -- Carl Johnson carlj(a)peak.org -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Todd A. Jacobs on 30 Jan 2010 03:10 On Fri, Jan 29, 2010 at 02:26:40PM -0800, Carl Johnson wrote: > If you have the cpufrequtils package installed, then just edit > /etc/defaults/cpufrequtils to specify which you want at boot. The /etc/defaults/cpufrequtils file over-rides the value (if any) in /etc/sysfs.conf, but I think it's important to know that values can be set there, too. Thanks for the help. -- "Oh, look: rocks!" -- Doctor Who, "Destiny of the Daleks" -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Tilo Schwarz on 30 Jan 2010 09:00
On Fri, 29 Jan 2010 23:26:40 +0100, Carl Johnson <carlj(a)peak.org> wrote: > "Tilo Schwarz" <tilo(a)tilo-schwarz.de> writes: > >> On Thu, 28 Jan 2010 05:42:13 +0100, Todd A. Jacobs >> <nospam(a)codegnome.org> wrote: >> >>> I'd like to set my scaling governor in /etc/sysctl.conf, rather than by >>> echoing a value to: >>> >>> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor >>> >>> However, I'm not finding a key for it via the sysctl utility. When I >>> run: >>> >>> sysctl -a | fgrep -i cpu >>> >>> I get nothing. Why can I write to a value in sysfs that can't be >>> accessed with sysctl? And more importantly, how am I supposed to do >>> this >>> at boot without sysctl.conf? >>> >> >> I use sysfs.conf: >> >> #grep demand /etc/sysfs.conf >> devices/system/cpu/cpu0/cpufreq/scaling_governor = ondemand > > If you have the cpufrequtils package installed, then just edit > /etc/defaults/cpufrequtils to specify which you want at boot. I don't have the cpufrequtils package installed. -- Regards, Tilo -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org |