netdev - Re: Possible regression in HTB

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Message-ID: <48EDE976.5040803@cdi.cz>
Date:	Thu, 09 Oct 2008 13:22:30 +0200
From:	Martin Devera <devik@....cz>
To:	Simon Horman <horms@...ge.net.au>
CC:	Jarek Poplawski <jarkao2@...il.com>,
	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>
Subject: Re: Possible regression in HTB

>> r2q affects computation for all classes
> 
> Sorry, I wasn't aware of that parameter.
> I ran a test now. With the default quantum (6250) for the 500Mbit/s
> class I got:
> 
> 10194: 383384949bits/s 383Mbits/s
> 10197: 285879669bits/s 285Mbits/s
> 10196: 287648424bits/s 287Mbits/s
> -----------------------------------
> total: 956913042bits/s 956Mbits/s
> 
> And when a quantum of 50000 for the 500Mbit/s class I got:
> 
> 10194: 396345613bits/s 396Mbits/s
> 10197: 279511994bits/s 279Mbits/s
> 10196: 281062498bits/s 281Mbits/s
> -----------------------------------
> total: 956920106bits/s 956Mbits/s

thanks! it seems there is no strong dependence. I'm out of simple
explanations and I'd have to simulate it myself.
Unfortunately I can't say when I can do it as I'm in complicated
part of life now....
So that let's live with that 90% of max rate limitation for now.
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