[mythtv-users] Cool'n'Quiet setup help
allen.p.edwards at gmail.com
Mon Feb 9 05:21:08 UTC 2009
On Sun, Feb 8, 2009 at 8:21 PM, John Drescher <drescherjm at gmail.com> wrote:
> > I apologize if this is a stupid question but I don't have a file
> > called up_threshold on my system. I do have powernowd but not cpufreq.
> > can find online docs for powernowd but again they are many years old and
> > have to assume out of date.
> > Allen
> You do not want powernowd. You want to use the in kernel cpu frequency
> scaling and the in kernel ondemand.
> Here is what should be enabled on an AMD cpu
> jmd1 ~ # zgrep POWERNOW /proc/config.gz
> jmd1 ~ # zgrep CPU_FREQ /proc/config.gz
> # CONFIG_CPU_FREQ_DEBUG is not set
> # CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
> # CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
> # CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
> # CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
> Then here is what I do in a startup script:
> echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
> echo 15 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold
Thank you for the reply,
I take it that the two lines you quote at the end cause the CPU to go to max
frequency at 15% load. That sounds good. I tried to make sense of the
other config settings but I do not have any kind of config file in the /proc
directory. I used some of what you gave me and did some searches but alas
they also gave me things to do on files that I do not have.
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