Frequency scaling not working
Mikkel L. Ellertson
mikkel at infinity-ltd.com
Thu Nov 22 16:59:45 UTC 2007
Aaron Konstam wrote:
> When I issue the commands above I get:
> [akonstam at 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 at 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.
Mikkel
--
Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!
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