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

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Message-ID: <450FA50F.1010207@openvz.org>
Date:	Tue, 19 Sep 2006 12:06:39 +0400
From:	Pavel Emelianov <xemul@...nvz.org>
To:	sekharan@...ibm.com
CC:	balbir@...ibm.com, Rik van Riel <riel@...hat.com>,
	Srivatsa <vatsa@...ibm.com>,
	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>, devel@...nvz.org,
	Matt Helsley <matthltc@...ibm.com>,
	Hugh Dickins <hugh@...itas.com>,
	Alexey Dobriyan <adobriyan@...l.ru>,
	Kirill Korotaev <dev@...ru>, Oleg Nesterov <oleg@...sign.ru>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added	user
 memory)

Chandra Seetharaman wrote:
> On Mon, 2006-09-18 at 16:37 +0400, Pavel Emelianov wrote:
>   
>> 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)
>>     
>
> I am confused. Are you changing the parameters on how the user want the
> groups to be controlled.
>   

Nope. I just calculate some auxiliary values to acheive the goal.

> They want the resource usage to be between 30 and 70, but you change it
> to be 30-45. 
>   

User wants group to consume _at_least_ 30%. I do provide it, but do not
prevent it from consuming more.

>   
>> To stop future "errors" remember that this is a simplified program that
>> considers guarantees to be <= 100%, sum of guarantees to be <= 100% etc.
>>
>> -------------------------------------------------------------------------
>> Using Tomcat but need to do more? Need to support web services, security?
>> Get stuff done quickly with pre-integrated technology to make your job easier
>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>> _______________________________________________
>> ckrm-tech mailing list
>> https://lists.sourceforge.net/lists/listinfo/ckrm-tech
>>     

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