linux-kernel - Re: [patch] CFS (Completely Fair Scheduler), v2

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Message-ID: <20070417075146.GM2986@holomorphy.com>
Date:	Tue, 17 Apr 2007 00:51:46 -0700
From:	William Lee Irwin III <wli@...omorphy.com>
To:	Peter Williams <pwil3058@...pond.net.au>
Cc:	Ingo Molnar <mingo@...e.hu>, 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>, caglar@...dus.org.tr,
	Willy Tarreau <w@....eu>,
	Gene Heskett <gene.heskett@...il.com>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>
Subject: Re: [patch] CFS (Completely Fair Scheduler), v2

Ingo Molnar wrote:
>> this is the second release of the CFS (Completely Fair Scheduler) 
>> patchset, against v2.6.21-rc7:
>>    http://redhat.com/~mingo/cfs-scheduler/sched-cfs-v2.patch
>> i'd like to thank everyone for the tremendous amount of feedback and 
>> testing the v1 patch got - i could hardly keep up with just reading the 
>> mails! Some of the stuff people addressed i couldnt implement yet, i 
>> mostly concentrated on bugs, regressions and debuggability.

On Tue, Apr 17, 2007 at 04:46:57PM +1000, Peter Williams wrote:
> Have you considered using rq->raw_weighted_load instead of 
> rq->nr_running in calculating fair_clock?  This would take the nice 
> value (or RT priority) of the other tasks into account when determining 
> what's fair.

I suspect you mean (curr->load_weight*delta_exec)/rq->raw_weighted_load
in update_curr().


-- wli
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