linux-kernel - Re: Renice X for cpu schedulers

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Message-ID: <20070420035717.GA1028@wotan.suse.de>
Date:	Fri, 20 Apr 2007 05:57:17 +0200
From:	Nick Piggin <npiggin@...e.de>
To:	Mark Lord <lkml@....ca>
Cc:	Con Kolivas <kernel@...ivas.org>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Matt Mackall <mpm@...enic.com>,
	William Lee Irwin III <wli@...omorphy.com>,
	Peter Williams <pwil3058@...pond.net.au>,
	Mike Galbraith <efault@....de>, ck list <ck@....kolivas.org>,
	Bill Huey <billh@...ppy.monkey.org>,
	linux-kernel@...r.kernel.org,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Renice X for cpu schedulers

On Thu, Apr 19, 2007 at 09:17:25AM -0400, Mark Lord wrote:
> Con Kolivas wrote:
> s go ahead and think up great ideas for other ways of metering out cpu 
> >bandwidth for different purposes, but for X, given the absurd simplicity 
> >of renicing, why keep fighting it? Again I reiterate that most users of SD 
> >have not found the need to renice X anyway except if they stick to old 
> >habits of make -j4 on uniprocessor and the like, and I expect that those 
> >on CFS and Nicksched would also have similar experiences.
> 
> Just plain "make" (no -j2 or -j9999) is enough to kill interactivity
> on my 2GHz P-M single-core non-HT machine with SD.

Is this with or without X reniced?


> But with the very first posted version of CFS by Ingo,
> I can do "make -j2" no problem and still have a nicely interactive destop.

How well does cfs run if you have the granularity set to something
like 30ms (30000000)?
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