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Message-ID: <20060922190106.GA32638@elte.hu>
Date: Fri, 22 Sep 2006 21:01:06 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Pavel Machek <pavel@...e.cz>
Cc: Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
Thomas Gleixner <tglx@...utronix.de>,
John Stultz <johnstul@...ibm.com>,
Arjan van de Ven <arjan@...radead.org>
Subject: Re: 2.6.19 -mm merge plans
* Pavel Machek <pavel@...e.cz> wrote:
> > would be nice to merge the -hrt queue that goes right ontop this
> > queue. Even if HIGH_RES_TIMERS is "default n" in the beginning. That
> > gives us high-res timers and dynticks which are both very important
> > features to certain classes of users/devices.
>
> dynticks give benefit of 0.3W, or 20minutes (IIRC) from 8hours on
> thinkpad x60... and they were around for way too long. (When baseline
> is hz=250, it is 0.5W from hz=1000 baseline). It would be cool to
> finally merge them.
note that this is a new implementation of dynticks though, not Con's
older stuff which you probably used, right? But it's fairly low-impact
(just a few lines ontop of hrtimers, here and there), ontop of the
long-existing -hrt queue.
Ingo
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