From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Furniss Date: Wed, 27 Jul 2005 21:53:11 +0000 Subject: Re: [LARTC] HTB and PRIO qdiscs introducing extra latency when output Message-Id: <42E80247.7010100@dsl.pipex.com> List-Id: References: <1122460110.8454.11.camel@pgala.it.nuigalway.ie> In-Reply-To: <1122460110.8454.11.camel@pgala.it.nuigalway.ie> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Jonathan Lynch wrote: > Andy, Many thanks for your reply. Below is some output from the queueing > disciplines to show that the filters are working correctly and they are > going to the right classes. OK classification looks good then. > > pass_on means if no class id equal to the result of the filter is found > then try next filter, which is the BE class in this case. Ahh I'll have to play with this dsmark stuff one day :-) > > So back to the main question, could anyone tell me why the delay is so > high (30ms) for VoIP packets which are treated with the EF phb when the > outgoing interface of core router to network c is saturated ? I would test next with htb setup like (assuming you are HZ00 - you will be under rate if not) - ... tc class add dev $1 parent 2:0 classid 2:1 htb rate 90Mbit ceil 90Mbit quantum 1500 burst 12k cburst 12k tc class add dev $1 parent 2:1 classid 2:10 htb rate 1500kbit ceil 90Mbit quantum 1500 burst 12k cburst 12k ... tc class add dev $1 parent 2:1 classid 2:20 htb rate 5Mbit ceil 90Mbit quantum 1500 burst 12k cburst 12k ... If that doesn't make things any better then you could try giving the 2:10 class a rate alot higher than it needs and see if that helps. Andy. _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc