Messages in this thread | | | Subject | Re: [PATCH] Remove timer frequency choice if tickless is enabled | From | Peter Zijlstra <> | Date | Mon, 14 Jan 2008 09:28:15 +0100 |
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On Mon, 2008-01-14 at 09:25 +0100, Ingo Molnar wrote: > (lkml Cc:-ed) > > * Carlos R. Mafra <crmafra2@gmail.com> wrote: > > > choice > > prompt "Timer frequency" > > + depends on !NO_HZ > > default HZ_250 > > help > > Allows the configuration of the timer frequency. It is customary > > we are not there yet to be able to do this. With NO_HZ the tick is only > disabled when we go idle - but it still runs (and we rely on it, for > example in the scheduler code) while we are non-idle. Peter Zijlstra is > working on the 'high-res scheduler tick' feature to remove the scheduler > dependencies.
Yes, and even then we're still not there, there are various other features that are tick driven, among them the RCU quiecent state machine.
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