linux-kernel - Re: [ckrm-tech] [RFC] [PATCH 0/3] Add group fairness to CFS

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Message-ID: <20070530001406.GA8449@gnuppy.monkey.org>
Date:	Tue, 29 May 2007 17:14:06 -0700
From:	Bill Huey (hui) <billh@...ppy.monkey.org>
To:	Srivatsa Vaddagiri <vatsa@...ibm.com>
Cc:	"Li, Tong N" <tong.n.li@...el.com>,
	Nick Piggin <nickpiggin@...oo.com.au>, tingy@...umass.edu,
	ckrm-tech@...ts.sourceforge.net, Balbir Singh <balbir@...ibm.com>,
	efault@....de, pwil3058@...pond.net.au, kernel@...ivas.org,
	linux-kernel@...r.kernel.org,
	William Lee Irwin III <wli@...omorphy.com>,
	containers@...ts.osdl.org, Ingo Molnar <mingo@...e.hu>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	"Bill Huey (hui)" <billh@...ppy.monkey.org>
Subject: Re: [ckrm-tech] [RFC] [PATCH 0/3] Add group fairness to CFS

On Mon, May 28, 2007 at 10:09:19PM +0530, Srivatsa Vaddagiri wrote:
> On Fri, May 25, 2007 at 10:14:58AM -0700, Li, Tong N wrote:
> > is represented by a weight of 10. Inside the group, let's say the two
> > tasks, P1 and P2, have weights 1 and 2. Then the system-wide weight for
> > P1 is 10/3 and the weight for P2 is 20/3. In essence, this flattens
> > weights into one level without changing the shares they represent.
> 
> What do these task weights control? Timeslice primarily? If so, I am not
> sure how well it can co-exist with cfs then (unless you are planning to
> replace cfs with a equally good interactive/fair scheduler :)

It's called SD. From Con Kolivas that got it right the first time around :)

> I would be very interested if this weight calculation can be used for
> smpnice based load balancing purposes too ..

bill

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