* Andi Kleen <[email protected]> wrote:
> > at least the current out-of-idle code already does what amounts to a
> > PM-timer read when exiting from C2 or C3 mode. The
>
> C2/C3 are already slow. I more worry about C1.
C2/C3 are only slow in older CPUs - and they are getting faster and
faster. (also, newer systems do less of C1, due to increased energy
awareness.)
would be nice to measure the overhead/impact i suspect.
Ingo
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