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