Re: [PATCH documentation 1/2] nohz1: Add documentation.

From: Paul E. McKenney
Date: Thu Apr 11 2013 - 14:28:10 EST

On Thu, Apr 11, 2013 at 10:14:28AM -0700, Arjan van de Ven wrote:
> >+2. Many architectures will place dyntick-idle CPUs into deep sleep
> >+ states, which further degrades from-idle transition latencies.
> >+
> I think this part should just be deleted.
> On x86, the deeper idle states are even used with non-tickless system (the break even times are
> quite a bit less than even 1 msec).
> I can't imagine that ARM is worse on this, at which point the statement above is highly dubious

Interesting point, and I freely admit that I don't have full knowledge
of the energy-consumption characteristics of all the architectures that
Linux supports. Adding a few of the ARM guys on CC for their take,
plus linux-rt-users.

If there are no objections, I will delete point 2 above as Arjan suggests.

Thanx, Paul

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