netdev - Re: testing crazy stuff with iproute2

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Message-Id: <20071228131932.M39091@visp.net.lb>
Date:	Fri, 28 Dec 2007 15:20:13 +0200
From:	"Denys Fedoryshchenko" <denys@...p.net.lb>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: testing crazy stuff with iproute2

Prio is limited. I can have on PPPoE up to 500-600 customers, and i need to 
create for each in ifb device class/qdisc. So prio will not fit.

On Fri, 28 Dec 2007 11:18:27 +0100, Jarek Poplawski wrote
> On Fri, Dec 28, 2007 at 01:44:17AM +0200, Denys Fedoryshchenko wrote:
> ....
> > For bandwidth sharing it is perfect, but i want just to make things, 
which i 
> > did with TBF - some time bursty speed, and then slow down to lower speed 
if 
> > customer is using too much. In theory it has to work like this, but in 
> > practice i am hitting wall. I tried it about 1 year ago, it was same 
thing, 
> > just with another conditions. Seems cburst/burst a bit different thing, 
just 
> > to make load on CPU by HTB less , at high speeds.
> 
> IMHO it's quite possible you're trying to use HTB to things it is
> not intended to do. cburst/burst have to limit burstiness and not
> change rates depending on load. But, maybe they could do the other
> things too whith some tricks, I don't know. I think CBQ or maybe
> HFSC could be better for you. But, if TBF works for you, and you
> don't need sharing (lending) I don't understand why to 'fight'
> with HTB at all. You could maybe use it only to get class hierarchy
> with some high, not limiting rates, or even try e.g. prio + TBF
> combination.
> 
> Regards,
> Jarek P.
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--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.

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