Hi, We've done a lots of tests on htb class to study behaviuor of delay. We use this simple configuration: tc qdisc add dev eth1 handle 1:0 root htb tc class add dev eth1 parent 1:0 classid 1:1 htb rate 5000000 ceil 5000000 burst 30000 quantum 1600 tc class add dev eth1 parent 1:1 classid 1:10 htb prio 1 rate 1000000 ceil 1000000 quantum 1600 tc filter add dev eth1 parent 1:0 protocol ip prio 1 handle 1 fw classid 1:10 tc class add dev eth1 parent 1:1 classid 1:20 htb prio 1 rate 1500000 ceil 1500000 quantum 1600 tc filter add dev eth1 parent 1:0 protocol ip prio 1 handle 2 fw classid 1:20 tc class add dev eth1 parent 1:1 classid 1:100 htb prio 1 rate 2500000 ceil 2500000 quantum 1600 tc filter add dev eth1 parent 1:0 protocol ip prio 1 handle 10 fw classid 1:100 We create, with SmartBits device, 3 flows with this characteristics: 1° flows : lenght layer 2 64 - frame per second 1758 - bandwith total 900096 2° flows : lenght layer 2 1000 - frame per second 167 - bandwith total 1336000 3° flows : lenght layer 2 1500 - frame per second 187 - bandwith total 2244000 We are in conform traffic situation. The results of tests show us that a lots of packet of 3° flow have a certain delay (between 5ms - 100ms) but we can understand the reason. If we change the frame per second of 3° flows to 120 , we notice that the 2° flows have a certain delay too and nothing delay on the 3° flows!!!!!! How it can be possible ? How works qdisc pfifo_fast attached to each class ? Where can be generate this delayed ? We use htb version 3.7 on Kernel 2.4.20. Thank, thank, thank !!!! Ale&Enrick. _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
