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SubjectRe: [GIT PULL timers] Timer-wheel bandaids^Wcommits for 3.15
On Fri, Feb 28, 2014 at 06:06:38AM +0100, Mike Galbraith wrote:
> On Thu, 2014-02-27 at 17:27 -0800, Paul E. McKenney wrote:
> > Hello, Thomas and Ingo,
> >
> > This pull request contains latency bandaids^Woptimizations to the
> > timer-wheel code that are useful in conjunction with NO_HZ_FULL Kconfig
> > option. These optimizations reduce the jiffy-by-jiffy looping in cases
> > where there is either zero or one timers in the timer wheel, which is
> > a common case for NO_HZ_FULL "worker" CPUs that run almost entirely
> > in usermode for a single task.
> FWIW, these have seen quite a bit of runtime on various boxen, both in
> day to day and piddle about -rt kernels, with zero attention grabbers.

Thank you very much for your testing efforts, Mike!

Thanx, Paul

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