From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Kierdelewicz <marek@piasta.pl>
Subject: Re: QoS weirdness : HTB accuracy
Date: Thu, 25 Mar 2010 19:31:40 +0100
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To: Julien Vehent <julien@linuxwall.info>
Cc: netfilter <netfilter@vger.kernel.org>

> Hello folks,

Hi,

>I observe unused bandwidth on my QoS policy that I cannot explain.
>Conditions are: I have a HTB tree with 8 classes and a total rate of
>768kbits. I use the ATM option so I assume the real rate to be
>something close to 675kbits (about 88% of the ethernet rate).

Try adding p/bfifo or sfq qdisc under the classes. See if it chances
things. Don't ask me why. It just solved some problems in my case. W/o
qdisc I could sometimes see stalls like yours.

Best regards,
Marek