linux-kernel - Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]

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Message-ID: <20070417200553.GO2986@holomorphy.com>
Date:	Tue, 17 Apr 2007 13:05:53 -0700
From:	William Lee Irwin III <wli@...omorphy.com>
To:	James Bruce <bruce@...rew.cmu.edu>
Cc:	Chris Friesen <cfriesen@...tel.com>, Willy Tarreau <w@....eu>,
	Pekka Enberg <penberg@...helsinki.fi>,
	hui Bill Huey <billh@...ppy.monkey.org>,
	Ingo Molnar <mingo@...e.hu>, Con Kolivas <kernel@...ivas.org>,
	ck list <ck@....kolivas.org>,
	Peter Williams <pwil3058@...pond.net.au>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]

On Tue, Apr 17, 2007 at 09:07:49AM -0400, James Bruce wrote:
> Nonlinear is a must IMO.  I would suggest X = exp(ln(10)/10) ~= 1.2589
> That value has the property that a nice=10 task gets 1/10th the cpu of a 
> nice=0 task, and a nice=20 task gets 1/100 of nice=0.  I think that 
> would be fairly easy to explain to admins and users so that they can 
> know what to expect from nicing tasks.
[...additional good commentary trimmed...]

Lots of good ideas here. I'll follow them.


-- wli
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