CPU speed
in [Suse]
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From: lurch on 4 Dec 2009 23:57 On Sat, 05 Dec 2009 02:18:40 +0000, Ulick Magee <ulickatmaildotcom(a)feckoff.invalid> wrote: >marrgol wrote: >> On 2009-12-04 17:34, houghi wrote: >>> The reason is that something already does the changing of the CPU speed >>> so I would not like to install another program if it isn't needed. >> >> It's cpufreq kernel module(s) together with HAL. >> >>>> At least cpufrequtils would let you experiment and see if you could get >>>> the frequency any higher >> >> That's exactly what cpufrequtils is for - just install it, does 100k >> make you a difference? >> >>> I want to force >>> the PC at full speed with the ability to turn things back later. >> >> Then do use cpufrequtils. And if you really don't want to, then >> have a look at the files in /sys/devices/system/cpu/cpu?/cpufreq/. >> They have pretty meaningful names and some(all?) are writable... >> Hint: section 3 of /usr/src/linux/Documentation/cpu-freq/user-guide.txt. >> >> And if you don't mind reboots you can run your cpu(s) at full speed by >> adding CPUFREQ=off kernel boot parameter. > >Great post. It's good to see the nuts and bolts behind the fancy GUI >utilities. > >*Everything* really is a file :) Everything computer-wise is a collection of bits, that are usually, at some point, found in the form of a file.
From: Darklight on 6 Dec 2009 08:00 houghi wrote: > Kevin Nathan wrote: >> Digging more into /etc I found /etc/sysconfig/powersave/cpufreq which >> appears to be where you can set how you want it to be handled (kernel, >> HAL). A comment in that file seems to apply in your case: > > I do not have that file. :-( > > houghi ok if you have the manual for your motherboard get it out and then go into the bios and change the setting so the motherboard does not throttle the cpu. It is obvious to me that the motherboard is throttling the cpu i had a similar problem to you, in that i could not get kpowersave to throttle the cpu. i found out that before i could use kpowersave for dynamic, performance, accustic etc the bios had to be set to throttling. in saying that i am sure if you install kpowersave you can stop the cpu from being throttled from there.
From: Darklight on 6 Dec 2009 08:02 houghi wrote: > Kevin Nathan wrote: >> Digging more into /etc I found /etc/sysconfig/powersave/cpufreq which >> appears to be where you can set how you want it to be handled (kernel, >> HAL). A comment in that file seems to apply in your case: > > I do not have that file. :-( > > houghi one last word throttling a cpu is a good thing in that it prolongs the life of a cpu.
From: Günther Schwarz on 6 Dec 2009 11:18
Darklight wrote: > one last word throttling a cpu is a good thing in that it prolongs the > life of a cpu. Might be. The main effects are that it reduces the electricity bill, allows for longer run time of notebooks as well as slower fan speeds and thus less noise. Günther |