Re: CPU Throttling

[Srikanth Konjarla <srikanth konjarla gmail com>]

Todd Denniston wrote:
> Srikanth Konjarla wrote, On 04/30/2008 12:02 AM:
> > Paul Johnson wrote:
> > > On 4/29/08, Srikanth Konjarla <srikanth konjarla gmail com> wrote:
> > > > All,
> > > >
> > > > I run Fedora 8 on Tecra M5.
> > > >
> > > > http://www.smolts.org/show?uuid=pub_f72f9650-72f0-4d83-9c51-0cb13856226b 
> > > >
> > > >
> > > > It appears that the CPU throttling is not available.
> > >
> > > On my Dell laptop, a cpuspeed package is running. look in
> > > system-config-services, see if you have it on.
> > >
> > > I'm using a Nokia tablet now, don't have laptop here.
> > >
> > > Other thought I have is that cpuspeed, rather than throttling, is the
> > > only thing i use anymore. AFAICR, throttling would leave unused
> > > cycles, which is   almost same as making the cpu slower.
> > I have enabled and running the cpuspeed daemon now. However, how do I 
> > monitor if "cpuspeed" is actually working?
>
> watch 'cat \
>  /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq; \
>  cat /proc/acpi/thermal_zone/TZC/temperature'
>
> or for multiple cpu system
> watch 'cat \
>  /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq; \
>  cat /proc/acpi/thermal_zone/TZC/temperature'
>
> cheap, easy, available.
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
1000000
# cat /sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq
1000000

# cat /proc/acpi/thermal_zone/THRM/temperature
temperature:             79 C

Thanks

Srikanth