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

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Message-ID: <20070418102225.GA32478@elte.hu>
Date:	Wed, 18 Apr 2007 12:22:25 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Andy Whitcroft <apw@...dowen.org>
Cc:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steve Fox <drfickle@...ibm.com>,
	Nishanth Aravamudan <nacc@...ibm.com>
Subject: Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]


* Andy Whitcroft <apw@...dowen.org> wrote:

> > as usual, any sort of feedback, bugreports, fixes and suggestions 
> > are more than welcome,
> 
> Pushed this through the test.kernel.org and nothing new blew up. 
> Notably the kernbench figures are within expectations even on the 
> bigger numa systems, commonly badly affected by balancing problems in 
> the schedular.

thanks! Given the really low preemption latency/granularity default 
(roughly equivalent to 'timeslice length'), and that basically all of my 
focus was on interactivity characteristics, this is a pretty good 
result. I suspect it will be necessary to increase the default to 10 
msecs (or more) to be on the safe side. (Nick has reported a 4% 
kernbench drop so for his kernbench workload it's needed.)

	Ingo
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