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Subject: Re: idle Athlon with IOAPIC is 10C warmer since 2.6.3-bk1
From: Len Brown <len.brown@intel.com>
To: "Prakash K. Cheemplavam" <PrakashKC@gmx.de>
Cc: Thomas Schlichter <thomas.schlichter@web.de>, ross@datscreative.com.au,
       "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>, linux-kernel@vger.kernel.org
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On Fri, 2004-03-19 at 14:22, Prakash K. Cheemplavam wrote:

> Hmm, I just did a cat /proc/acpi/processor/CPU0/power:
> active state:            C1
> default state:           C1
> bus master activity:     00000000
> states:
>     *C1:                  promotion[--] demotion[--] latency[000] 
> usage[00000000]
>      C2:                  <not supported>
>      C3:                  <not supported>
> 
> I am currently NOT using APIC mode (nforce2, as well) and using vanilla 
> 2.6.4. It seems C1 halt state isn't used, which exlains why I am having 
> trouble to keep my CPU cooler these day. I once started a thread 
> suspecting acpi timer, but it is not the case. It seems to be something 
> else. As I don't use PIC, it cannot be that  8259-timer-ack-fix.patch 
> causin git, or can it? Maybe something broken in ACPI? I might try out 
> older kernels to find out...
> 
> Prakash

Actually I think it is that we don't _count_ C1 usage.

cheers,
-Len


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