linux-kernel - Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory)

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Message-ID: <450E9327.8020004@openvz.org>
Date:	Mon, 18 Sep 2006 16:37:59 +0400
From:	Pavel Emelianov <xemul@...nvz.org>
To:	balbir@...ibm.com
CC:	sekharan@...ibm.com, Srivatsa <vatsa@...ibm.com>,
	Rik van Riel <riel@...hat.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	CKRM-Tech <ckrm-tech@...ts.sourceforge.net>,
	Dave Hansen <haveblue@...ibm.com>, Andi Kleen <ak@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrey Savochkin <saw@...ru>,
	Matt Helsley <matthltc@...ibm.com>,
	Hugh Dickins <hugh@...itas.com>,
	Alexey Dobriyan <adobriyan@...l.ru>,
	Kirill Korotaev <dev@...ru>, Oleg Nesterov <oleg@...sign.ru>,
	devel@...nvz.org
Subject: Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added	user
 memory)

Balbir Singh wrote:

[snip]
>
> The program (calculate_limits()) listed on the website does not work for
> the following case
>
> N=2;
> R=100;
> g[2] = {30, 30};
>
>
> The output is -10 and -10 for the limits
>
> For
>
> N=3;
> R=100;
> g[3] = {30, 30, 10};
>
> I get -70, -70 and -110 as the limits
>
> Am I interpreting the parameters correctly? Or the program is broken?
>

Program on site is broken. Thanks for noticing:

$ gcc guar.c -o guar
$ ./guar 30 30
guar lim
  30  70 ( 70/1)
  30  70 ( 70/1)
$ ./guar 30 30 10
guar lim
  30  45 ( 90/2)
  30  45 ( 90/2)
  10  25 ( 50/2)


To stop future "errors" remember that this is a simplified program that
considers guarantees to be <= 100%, sum of guarantees to be <= 100% etc.
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