linux-kernel - Re: [RFC] Imprecise timers.

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Message-ID: <20080812215834.GB12911@elf.ucw.cz>
Date:	Tue, 12 Aug 2008 23:58:35 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Venki Pallipadi <venkatesh.pallipadi@...el.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	"arjan@...radead.org" <arjan@...radead.org>
Subject: Re: [RFC] Imprecise timers.

Hi!

> Instead a rounded timer after 5 seconds still ensures atleast 1s idle time on
> the CPU without the overhead.
> 
> There can be many users who really don't care about the deadline or can happliy
> use rounded timers or deferrable timers. Say garbage collectors, cache_reap
> and friends, ondemand governor, vga cursor blinking comes to my mind.

Ok, maybe.

But don't try to play with vga cursor blinking; any irregularity there
will be _very_ visible_.

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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