Re: CPU Throttling
Paul Johnson wrote:
On 4/29/08, Srikanth Konjarla <srikanth.konjarla(a)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
>
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