Re: CPU Throttling

[Srikanth Konjarla <srikanth konjarla gmail com>]

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?

Srikanth

> While, the suspend
> > resume and function keys work (brightness, sound etc) wondering why the
> > CPU throttling does not work and i also suspect that causes the FAN to
> > run all the time. Is there a workaround or patch?
> >
> > Thanks
> >
> > # acpitool -c
> >    CPU type               : Intel(R) Core(TM)2 CPU         T7200  @ 2.00GHz
> >    Min/Max frequency      : 1000/2000 MHz
> >    Current frequency      : 1000 MHz
> >    Frequency governor     : ondemand
> >    Freq. scaling driver   : acpi-cpufreq
> >    Cache size             : 4096 KB
> >    Bogomips               : 3993.65
> >    Bogomips               : 3990.77
> >
> >    # of CPU's found       : 2
> >
> >    Processor ID           : 0
> >    Bus mastering control  : yes
> >    Power management       : yes
> >    Throttling control     : no
> >    Limit interface        : no
> >    Active C-state         : C0
> >    C-states (incl. C0)    : 4
> >    Usage of state C1      : 813 (0.1 %)
> >    Usage of state C2      : 60224 (11.0 %)
> >    Usage of state C3      : 485253 (88.8 %)
> >
> >    Processor ID           : 1
> >    Bus mastering control  : yes
> >    Power management       : yes
> >    Throttling control     : no
> >    Limit interface        : no
> >    Active C-state         : C0
> >    C-states (incl. C0)    : 4
> >    Usage of state C1      : 1247 (0.1 %)
> >    Usage of state C2      : 163294 (14.3 %)
> >    Usage of state C3      : 490818 (43.0 %)
> >
> > # cat /proc/acpi/processor/CPU0/throttling
> > <not supported>
> > # cat /proc/acpi/processor/CPU1/throttling
> > <not supported>
> >
> > # modinfo toshiba_acpi
> > filename:
> > /lib/modules/2.6.24.4-64.fc8/kernel/drivers/acpi/toshiba_acpi.ko
> > license:        GPL
> > description:    Toshiba Laptop ACPI Extras Driver
> > author:         John Belmonte
> > depends:
> > vermagic:       2.6.24.4-64.fc8 SMP mod_unload 686 4KSTACKS
> >
> > --
> > fedora-list mailing list
> > fedora-list redhat com
> > To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list