notify userland about C-state changes
Sean Bruno
seanbru at yahoo-inc.com
Wed Oct 3 16:21:41 UTC 2012
On Wed, 2012-10-03 at 06:08 -0700, Andriy Gapon wrote:
> >
> > So quick question, does this happen a lot on a system with a
> sporadic
> > workload? Does this introduce overhead to the system to service the
> > notification requests?
>
> I am not sure who can answer this question. It is up to ACPI platform
> to decide
> when it changes _available C-states_. OS doesn't have control over
> that.
>
Hrm ... what changes to the machine would make this happen while the
machine is running? things like the switching from battery to line
power?
> P.S. I hope you haven't confused this notification for a notification
> about
> _current_ C-state changing.
I did have it confused. Thanks for putting this note in.
Sean
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