Messages in this thread | | | Date | Mon, 19 Nov 2007 20:05:29 -0500 | From | Stephen Clark <> | Subject | Re: Power Saving |
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Dave Jones wrote:
>On Mon, Nov 19, 2007 at 07:41:31PM -0500, Stephen Clark wrote: > > Hello List, > > > > I am trying to get throttling to work on the following processor > >I think by throttling, you actually mean changing frequency/voltage ? >(throttling is something else, where the CPU skips every n cycles, > which doesn't actually save any power) > > > with linux 2.6.17-1.2142_FC4 with no luck. > >wow. that's a prehistoric kernel. > > > AMD Athlon(tm) XP 1700+ > >you lose. Only the mobile athlons supported scaling their speed. >And even then, only if the BIOS supported it with the correct tables. >(Typically this means, "only laptops"). > > Dave > > > well what about the info from /proc/
cat /proc/acpi/processor/CPU0/info processor id: 0 acpi id: 0 bus mastering control: no power management: yes throttling control: yes limit interface: yes
and: cat /proc/acpi/processor/CPU0/throttling state count: 2 active state: T0 states: *T0: 00% T1: 50%
and: [root@joker ~]# cat /proc/acpi/processor/CPU0/power active state: C2 max_cstate: C8 bus master activity: d18324c9 states: C1: type[C1] promotion[C2] demotion[--] latency[000] usage[01340140] *C2: type[C2] promotion[--] demotion[C1] latency[090] usage[02980043]
???? Steve
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