Javier Vasquez wrote:

> Hi,
>
> I've been trying to enable throttling (cpufreq) on a coppermine
> (pentium iii) stepping 6, but I haven't had success. This is under a
> toshiba satellite 2800-s202.
>
> I've compiled kernel even selecting the option relaxed check (of
> course specifying right processor and such). This processor
> corresponds to the speedstep-smi module, and I've even tried all
> suggestions under:
>
> http://powersave.sourceforge.net/powersave/Cpufreq.html
>
> and their combinations. I've also tried enabling modules toshiba and
> toshiba_acpi, but that doesn't seem to help on the task.
>
> Has anyone faced this before? Does anyone have suggestion on how to
> proceed? I can't provide the .config file right now, but later when
> getting back home I would if required... One thing is that I'm
> compiling the power stuff as modules, so I can install/uninstall them
> as required for trials, I don't think that's a problem, but maybe
> having them embedded in the kernel core helps, I don't know...
>
> Thanks,
>

AFAIK that processor doesn't support Dynamic CPU Speed Scaling.

Ritesh
--
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"


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On Tuesday 13 February 2007, Javier Vasquez wrote:
> I admit I'm not knowledgeable enough in the topic, but on windows the
> processor can go from high freq to low freq under battery mode. *Also
> the bios has an option to keep the freq high, low or dynamically set.
> I chose by bios to be dynamically set of course. *So I'm kind of
> perplex about your comment. *Also I read from the kernel itself that
> speedstep-smi supports coppermine cpus with the chipset I have, but of
> course it hadn't worked yet since I'm mailing...
>

AFAIK Intel's Speedstep Technology in only implemented in the Mobile familyof
processors from Intel. I really don't know what family the coppermine cpu
falls under.

> How did you confirm this cpu doesn't support throttling?

Check for the "est" cpu flag in /proc/cpuinfo. If available, your processor
supports the Speedstep Technology.

Ritesh
--
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is
research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"

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On Wednesday 14 February 2007, Javier Vasquez wrote:
> The est flag doesn't show up in /proc/cpuinfo, and
> /proc/acpi/processor/CPU0/info indicates no throttling suppor, but I
> though that indicates the kernel doesn't support throttling for this
> cpu, which doesn't imply the cpu doesn't support it. *Again I don't
> understan how come under windows the basic speedstep function works
> (only 2 frequences suportted), and the bios support dynamically
> setting of the frequency, if the cpu doesn't really support any of
> that...
>
> Any ways, I can accept reality, ...

Blame Intel for that.

The specs aren't really put for this particular processor. Now the reason why
it isn't available is not known, probably a marketing reason.

There was a patch long back on lkml to print a message in dmesg when this cpu
was seen, to show that the kernel doesn't support Speedstep on this
processor.

I don't know the current state. Probably it won't be implemented.

Ritesh
--
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is
research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"

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