Re: CPU Throttling

[Todd Denniston <Todd Denniston ssa crane navy mil>]

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.

--
Todd Denniston
Crane Division, Naval Surface Warfare Center (NSWC Crane)
Harnessing the Power of Technology for the Warfighter