netdev - Re: Possible regression in HTB

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Message-Id: <200810081006.38840.denys@visp.net.lb>
Date:	Wed, 8 Oct 2008 10:06:38 +0300
From:	Denys Fedoryshchenko <denys@...p.net.lb>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	Patrick McHardy <kaber@...sh.net>,
	Simon Horman <horms@...ge.net.au>, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>,
	Martin Devera <devik@....cz>
Subject: Re: Possible regression in HTB

On Wednesday 08 October 2008, Jarek Poplawski wrote:
> On Wed, Oct 08, 2008 at 02:31:26AM +0200, Patrick McHardy wrote:
> ...
>
> > I'm pretty sure that the differences are caused by HTB not being
> > in control of the queue since the device is the real bottleneck
> > in this configuration.
>
> Yes, otherwise there would be no requeuing. And, btw. the golden rule
> of scheduling/shaping is limiting below "hardware" limits.
By the way, HTB counting ethernet headers (e.g. if you send 1500 byte ping, it 
will be 1514 in tc counters) . So possible ethernet overhead counted.


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