Strange cpufreq effects

[loftwyr]

I have enabled cpufreq in my kernel with everything turned on and emerged cpufreqd and cpudyn.

strangely, I get different readings in /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq and scaling_min_freq

Here's what dmesg says:

Code: Select all

powernow-k8: Found 2 AMD Athlon 64 / Opteron processors (version 1.50.4)
powernow-k8:    0 : fid 0xe (2200 MHz), vid 0x8 (1350 mV)
powernow-k8:    1 : fid 0x2 (1000 MHz), vid 0x12 (1100 mV)

cpuinfo_min_freq is 1000000 but scaling_min_freq is 1452000.

1.45 GHz isn't on the powernow list yet that's what my system slows to. If I try to adjust scaling_min_freq 1000000 to my machine locks up.

What am I doing wrong or is this just some weird bug?

I'm using a GA-K8NF-9 with an AMD X2 4200+ and the latest kernel.

[mudrii]

OK
so your problem you have AMD dual core that mean 2 CPU you should apply cpufreqd for both cores not only for one.
run cpufreqd for each CPU

Code: Select all

Enable CPU scaling
modprobe powernow-k8
modprobe cpufreq-ondemand
echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo ondemand > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor 

copy above lines in /etc/conf.d/local.start
and on the next reboot you will have working cpu freq scaling for both cores.

Output
powernow-k8: 0 : fid 0xe (2200 MHz), vid 0x8 (1350 mV)
powernow-k8: 1 : fid 0x2 (1000 MHz), vid 0x12 (1100 mV)

mean that you 2 in 1 CPU can scale from 2200 Mhz to 1000 Mhz

And scaling will work auto depend on CPU load so it will not required any intervention from user side.