Messages in this thread | | | Subject | Re: [PATCH RFC tip/core/rcu] Add callback-free CPUs | From | Peter Zijlstra <> | Date | Thu, 06 Sep 2012 20:21:50 +0200 |
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On Thu, 2012-09-06 at 10:46 -0700, Paul E. McKenney wrote: > Getting these > CPUs into adaptive-tick mode more quickly reduces OS jitter, which is > one big expected benefit of adaptive-tick mode.
I'm not sure I agree with that statement. Its a transition thing and therefore statistically irrelevant on the whole -- assuming we transition rarely.
And for those who cannot deal with the transition effects, a barrier was proposed which would wait until the system hit this state -- although the specific implementation of this isn't clear yet afaik.
I very much think we should focus on getting adaptive tick working as simple as possible and worry about transition effects later, if at all.
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