From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lawrence MacIntyre Date: Wed, 12 May 2004 16:36:28 +0000 Subject: [LARTC] HFSC Message-Id: <40A2528C.3030306@ornl.gov> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Hi: I am using a machine with the 2.4.26 kernel, and trying to compare the performance of the HTB qdisc with the HFSC one. I have the following simple script that allows me to have a video stream on port 1234 while it limits a ttcp UDP stream so that the video stream is unimpaired. #!/bin/bash tc qdisc add dev eth0 root handle 1: htb default 12 tc class add dev eth0 parent 1: classid 1:1 htb rate 30mbit ceil 30mbit tc class add dev eth0 parent 1:1 classid 1:10 htb rate 20mbit ceil 30mbit tc class add dev eth0 parent 1:1 classid 1:11 htb rate 10mbit ceil 30mbit tc qdisc add dev eth0 parent 1:10 handle 20: pfifo limit 5 tc qdisc add dev eth0 parent 1:11 handle 30: pfifo limit 5 tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip dport 1234 0xffff flowid 1:10 tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip dport 5001 0xffff flowid 1:11 Now I would like to try H-FSC. I'm not sure exactly how to go about this. I thought that creating a ul class with two ls classes inside and then putting an rt class in one of the ls classes for the video might work, but I can't seem to get it to work. For example, #!/bin/bash /usr/local/bin/tc qdisc add dev eth0 root handle 1: hfsc /usr/local/bin/tc class add dev eth0 parent 1: classid 1:1 hfsc ul m1 30mbit d 0 m2 30mbit ls m1 30mbit d 0 m2 30mbit When the second command is executed, the machine simply drops all packets going through it. I would like to try the 2.6 kernel, but my machine has an Adaptec SCSI controller that has a broken driver for the 2.6 kernel. I don't understand why this statement causes the machine to drop all packets on the eth0 interface. -- Lawrence MacIntyre 865.574.8696 lpz@ornl.gov Oak Ridge National Laboratory High Performance Information Infrastructure Technology Group _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/