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

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Message-ID: <20070530025132.GB6909@holomorphy.com>
Date:	Tue, 29 May 2007 19:51:32 -0700
From:	William Lee Irwin III <wli@...omorphy.com>
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, containers@...ts.osdl.org,
	Ingo Molnar <mingo@...e.hu>, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.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:
> 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 :)
> I would be very interested if this weight calculation can be used for
> smpnice based load balancing purposes too ..

Task weights represent shares of CPU bandwidth. If task i has weight w_i
then its share of CPU bandwidth is intended to be w_i/sum_i w_i.

"Load weight" seems to be used more in the scheduler source.


-- wli
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