RE: [Xen-devel] [PATCH] 1/2: cpufreq/PowerNow! in Xen: Time and platform changes

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

>From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
>Sent: 2007年9月1日 21:58
>options unavailable). But why would available C states change? I
>thought
>these states were implemented internally on the CPU, and so are either
>universally available or not, and I don't see any physical explanation for

Normally C1 (halt) is implemented internally on CPU, while the rest goes 
to chipset which then like to stop CPU clock or other heavy power saving 
work...

Thanks,
Kevin

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