On Thu, 21 Jun 2007 14:57:23 +0300
"Török Edvin" <[EMAIL PROTECTED]> wrote:
> On 6/21/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> >
> > Not at all, still the same.
>
> Then maybe your BIOS correctly reports C4 through acpi. BTW I tested
> on a Dell Inspiron 6400.
> ACPI reports 3 c-states in dmesg:
>
> ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
> ACPI: Processor [CPU0] (supports 8 throttling states)
> ACPI: CPU1 (power states: C1[C1] C2[C2] C3[C3])
> ACPI: Processor [CPU1] (supports 8 throttling states)
>
> Also /proc/acpi/processor/CPU0/power:
> active state: C0
> max_cstate: C8
> bus master activity: 00000000
> maximum allowed latency: 8000 usec
> states:
> C1: type[C1] promotion[--] demotion[--]
> latency[001] usage[00004077] duration[00000000000000000000]
> C2: type[C2] promotion[--] demotion[--]
> latency[001] usage[04337133] duration[00000000007870996131]
> C3: type[C3] promotion[--] demotion[--]
> latency[085] usage[02418145] duration[00000000013129058814]
>
> Could you please check your dmesg output, and see how many C-states
> it reports?
>
> Thanks,
> Edwin
It's the same and powertop never shows C4. I have ThinkPad Z61m with
Core 2 Duo (T5500).
active state: C0
max_cstate: C8
bus master activity: 00000000
maximum allowed latency: 8000 usec
states:
C1: type[C1] promotion[--] demotion[--]
latency[001] usage[00003983] duration[00000000000000000000]
C2: type[C2] promotion[--] demotion[--]
latency[001] usage[00375366] duration[00000000000015440633]
C3: type[C3] promotion[--] demotion[--]
latency[017] usage[02998755] duration[00000000003428718244]
ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
ACPI: Processor [CPU0] (supports 8 throttling states)
ACPI: CPU1 (power states: C1[C1] C2[C2] C3[C3])
ACPI: Processor [CPU1] (supports 8 throttling states)
BTW should be CPU idle power consumption same regardless of frequency?
I can see the difference only under load.
Adam
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