Re: [PATCH] intel_idle: disable NHM/WSM HW C-state auto-demotion (v3)

From: Pierre Tardy
Date: Sun Feb 27 2011 - 11:18:07 EST

On Wed, Feb 16, 2011 at 7:22 AM, Len Brown <lenb@xxxxxxxxxx> wrote:
> From: Len Brown <len.brown@xxxxxxxxx>
> Hardware C-state auto-demotion is a mechanism where the HW overrides
> the OS C-state request, instead demoting to a shallower state,
> which is less expensive, but saves less power.
I'm interrested, for pytimechart, to have trace information of what
actual c-state got reached after each idle request.
Do you have any info on how to get that?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at