Re: 2.6.16rc5 'found' an extra CPU.

[Romano Giannetti <romanol@upcomillas.es>]

On Thu, Mar 02, 2006 at 07:53:39AM -0800, Zwane Mwaikambo wrote:
> On Thu, 2 Mar 2006, Romano Giannetti wrote:
> 
> > On Thu, Mar 02, 2006 at 12:49:53AM -0500, Brown, Len wrote:
> > > 
> > > I'm afraid that even after we get this stuff out of /proc
> > > and into sysfs where it belongs, we'll have to leave /proc/acpi around
> > > for a while b/c unfortunately people are under the impression
> > > that the path names there actually mean something and
> > > they can actually count on them -- which they can't.
> > 
> > Is it possible to obtain the same control/information with sysfs that is
> > available from /proc/acpi? For example, I use quite extensively CPU
> > throttling on my VAIO ("cool & quiet home-made mode"), and I was unable to
> > find the equivalent of /proc/acpi/processor/CPU0/throttling ...
> 
> I can't help thinking that that should be going through cpufreq.

Yes, I agree. But in the relevant /sys/devices/system/cpu/cpu0/cpufreq there
were no "throttling" options (well: as of 2.6.11). Maybe it's something
failing in my old vaio fx701, but scaling down frequencies is not sufficient
to keep it cool (compiling a kernel in summer in Madrid without air
conditioning reliably triggers thermal shutdown if I do not throttle the CPU
at level 4 when overheating; I have a little python script running for it).

Romano 

-- 
Romano Giannetti             -  Univ. Pontificia Comillas (Madrid, Spain)
Electronic Engineer - phone +34 915 422 800 ext 2416  fax +34 915 596 569
http://www.dea.icai.upcomillas.es/romano/

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