Re: [PATCH] ACPI: Fix the incorrect calculation about C-state idle time

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On Wed, Jun 02, 2010 at 11:04:09AM +0800, yakui.zhao@xxxxxxxxx wrote:
> From: Zhao Yakui <yakui.zhao@xxxxxxxxx>
> 
> The C-state idle time is not calculated correctly, which will return the wrong
> residency time in C-state. It will have the following effects:
>    1.  The system can't choose the deeper C-state when it is idle next time.
> Of course the system power is increased. E.g. On one server machine about 40W
> idle power is increased.
>    2.  The powertop shows that it will stay in C0 running state about 95% time
> although the system is idle at most time.

What kind of system was this seen on?

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
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