CPU scaling on Intel Centrino Duo?

[Carsten Aulbert]

Hi Duncan,

Duncan Lithgow wrote:
> I've been wondering about this for a while... I maintain a laptop test
> for my laptop
> (https://wiki.ubuntu.com/LaptopTestingTeam/HP_Pavilion_DV8220EA) but
> I've never been able to find out just what range of CPU scaling my
> processor _should_ support. It's always got some scaling, but I don't
> know if that's the right amount - can someone help me?

I don't know if this is the piece of information you are looking for:

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
2266000 1866000 1600000 1333000 1066000 800000

There are other interesting pieces there as well, e.g.

 cat /sys/devices/system/cpu/cpu0/cpufreq/stats/{time,trans}*
2266000 2492847
1866000 128
1600000 48
1333000 96
1066000 400
800000 23431159
   From  :    To
         :   2266000   1866000   1600000   1333000   1066000    800000
  2266000:         0        14         3         9        31        87
  1866000:         4         0         1         1         0         8
  1600000:         1         0         0         2         0         1
  1333000:         3         0         0         0         3         6
  1066000:         4         0         0         0         0        30
   800000:       125         0         0         0         0         0


HTH

Carsten