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From: Ulick Magee on 4 Dec 2009 17:40
houghi wrote:
>
> It is 2.00Ghz when nothing is going on. It is 2.83Ghz when a lot is
> going on. It is different depending on the load. I want to be able to
> put it at 2.83Ghz all the time.
>
> I do see it change from time to time.

Ah, right, I thought you meant it was 2GHz all the time.



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Ulick Magee

Free software and free formats for free information for free people.
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From: DenverD on 4 Dec 2009 18:16
i notice a CPU frequency modulation module loading into my
kernel....how about yours?...seems if such exists in your setup if it
can't load it can't do anything but run balls out..

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DenverD (Linux Counter 282315) via Thunderbird 2.0.0.23 (20090817),
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#1 SMP i686 athlon
From: lurch on 4 Dec 2009 19:15
On Fri, 04 Dec 2009 14:19:22 +0000, baron
<baron.nospam(a)linuxmaniac.nospam.net> wrote:

>houghi Inscribed thus:
>
>> Ulick Magee wrote:
>>> houghi wrote:
>>>> Darklight wrote:
>>>>> kpowersave
>>>>
>>>> Anything else? The above is not installed. I could install it
>>>> obviously, but something more generic would be nice.
>>>
>>> Houghi, is your google/scroogle broken? :-P
>>
>> No, it is not. I just am unable to find what program is already
>> installed on my machine that already does the changes and either
>> disable or reconfigure it.
>>
>>> First result for:
>>>
>>> configure cpu speed linux
>>>
>>> gives cpufreq. First result for cpufreq is:
>>
>> cpufreq is not installed
>>
>>> http://www.kernel.org/pub/linux/utils/kernel/cpufreq/cpufreq.html
>>>
>>> which links to:
>>>
>>>
>http://www.kernel.org/pub/linux/utils/kernel/cpufreq/cpufrequtils.html
>>>
>>> cpufrequtils is in the main repo.
>>
>> Also not installed, just like kpowersave. ;-)
>>
>>>
>>> HTH, HAND and remember, GIYF :-;
>>
>> Ah, so the best alternative not to install something is to install
>> something? And yet something must be already installed on my machine
>> that let it go from 2.83 to 2.00. Or something must have set it to
>> 'ondemand'. I would like to have it as performance.
>>
>> So some setting somewhere does some changes and I would like to know
>> how and how I can change it.
>>
>> houghi
>
>Hi Houghi,
>Its quite likely that the CPU speed is actually 2000 for a 2.8Ghz cpu.
>I'm guessing that you have an intel cpu.


THIS is the right answer. The FSB, Memory, and main core busses are all
at different actual rates.

How though do you justify his mplayer pre-cacheing issues? They would
indicate that something is indeed different.
From: marrgol on 4 Dec 2009 20:23
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.


--
mrg
From: Ulick Magee on 4 Dec 2009 21:18
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 :)




--

Ulick Magee

Free software and free formats for free information for free people.
Open Office for Windows/OSX/Linux: http://www.openoffice.org
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