Re: [PATCH RFC nohz_full v2 2/7] nohz_full: Add rcu_dyntick datafor scalable detection of all-idle state

[Mike Galbraith]

On Mon, 2013-07-01 at 12:16 -0700, Paul E. McKenney wrote: 
> On Mon, Jul 01, 2013 at 11:34:13AM -0700, Josh Triplett wrote:

> > > > This also naturally raises the question "How can we let userspace get
> > > > accurate time without forcing a timer tick?".
> > > 
> > > We don't.  ;-)
> > 
> > We don't currently, hence my question about how we can. :)
> 
> Per-CPU atomic clocks?

Great idea, who needs timekeeping code. 

http://www.euronews.com/2013/04/02/swiss-sets-sights-on-miniscule-atomic-clock/

-Mike

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