From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Ingo Molnar <mingo@elte.hu>
Cc: "Carlos R. Mafra" <crmafra2@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Remove timer frequency choice if tickless is enabled
Date: Mon, 14 Jan 2008 09:28:15 +0100 [thread overview]
Message-ID: <1200299295.7415.0.camel@twins> (raw)
In-Reply-To: <20080114082543.GC18296@elte.hu>
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.
prev parent reply other threads:[~2008-01-14 8:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080112020026.GB5849@Pilar.physics.ucla.edu>
[not found] ` <20080112032718.GA3946@Pilar.socal.rr.com>
2008-01-14 8:25 ` Ingo Molnar
2008-01-14 8:28 ` Peter Zijlstra [this message]
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