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Re: Frequency scaling not working



On Thu, 2007-11-22 at 10:59 -0600, Mikkel L. Ellertson wrote:
> Aaron Konstam wrote:
> > When I issue the commands above I get:
> > [akonstam cyrus ~]$ cat /proc/acpi/processor/CPU0/throttling
> > state count:             8
> > active state:            T0
> > state available: T0 to T7
> > states:
> >    *T0:                  00%
> >     T1:                  12%
> >     T2:                  25%
> >     T3:                  37%
> >     T4:                  50%
> >     T5:                  62%
> >     T6:                  75%
> >     T7:                  87%
> > [akonstam cyrus ~]$
> > cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
> > 1867000 1600000 1333000 1067000 800000
> > 
> > Now the second set of numbers are the ones I actually see as cpu
> > frequencies. The first makes no sense at all. Can any one explain the
> > output?
> > 
> The T0 through T7 are throttle settings number 0 through 7. So you
> would use a value of 4 to throttle the CPU to 50%. If hte CPU
> supports only 3 different throttle settings, I would ounl expect to
> see T0 through T3.
However, I see only the cpuspeeds (5 of them) displayed by:
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
So why are there 8 throttle settings? What setting would give me no
throttling? It is a mystery.
--
=======================================================================
A baby is an alimentary canal with a loud voice at one end and no
responsibility at the other.
=======================================================================
Aaron Konstam telephone: (210) 656-0355 e-mail: akonstam sbcglobal net


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