Andreas Klauer wrote: > > On Sun, Mar 05, 2006 at 02:33:17PM -0800, gypsy wrote: > > Since I understand your ASCII art and comments, I would very much > > appreciate it if you would draw what you see and criticize the > > following. Hopefully I'll better understand after that! > > Uh, right. Don't take anything I say for granted, though. Understood. > > tc qdisc add dev imq0 root handle 1: htb default 20 > > > > tc class add dev imq0 parent 1: classid 1:2 htb rate 4522kbit ceil \ > > 4760kbit burst 16k cburst 16k quantum 1500 > > > > tc class add dev imq0 parent 1:2 classid 1:1 htb rate 4522kbit ceil \ > > 4760kbit burst 16k cburst 16k > > > > tc class add dev imq0 parent 1:1 classid 1:10 htb rate 2487kbit \ > > ceil 4760kbit burst 16k cburst 16k quantum 1500 prio 1 > > > > tc class add dev imq0 parent 1:1 classid 1:20 htb rate 2034kbit \ > > ceil 4341kbit burst 10k cburst 16k quantum 1500 prio 4 > > First, here is what I see: > > 1: HTB root qdisc (default 20) > | > \--- 1:2 HTB root class (4522kbit/4760kbit) > | > \--- 1:1 HTB class (4522kbit/4760kbit) > | > \--- 1:10 HTB leaf class (2487kbit/4760kbit) > \--- 1:20 HTB leaf class (2034kbit/4341kbit) > > Now on to the criticising; the root class has a higher ceil than rate. > However, different rate/ceil makes only sense if there is someone to > borrow bandwidth from, which is not the case here. The root class > acquires bandwidth directly from the QDisc, which has unlimited resources, > as the root class itself is supposed to be the limiting factor. So what > you have here should practically be no different from a 4760kbit class. > > The 1:1 class seems to be useless; it has exactly the same settings > as it's parent, except for quantum, which is not explicitely set. > Furthermore, it does not have any siblings. Does not make sense to > me as such a class will just use exactly the same rate as it's parent. > Compare the statistics of these two classes below. > > > class htb 1:1 parent 1:2 rate 4522Kbit ceil 4760Kbit burst 16Kb cburst > > 16Kb > > Sent 7826237 bytes 27128 pkts (dropped 0, overlimits 0) > > rate 1728bit 4pps > > lended: 1954 borrowed: 0 giants: 0 > > tokens: 39532 ctokens: 37555 > > > > class htb 1:2 root rate 4522Kbit ceil 4760Kbit burst 16Kb cburst 16Kb > > Sent 7826237 bytes 27128 pkts (dropped 0, overlimits 0) > > rate 1728bit 4pps > > lended: 0 borrowed: 0 giants: 0 > > tokens: 39532 ctokens: 37555 > > As for the leaf classes, their rates are fine (add up to the parent > class rate), except that the parent actually can use 4760kbit rate > rather than 4522kbit. Their priorities are questionable; using 1 and 4 > here should not be any different from 1 and 2 or 3 and 6 or 0 and 1. The four is a "leftover", but I want it clear that 1:10 has priority over 1:20. > It's one high- and one low-priority class either way. I would probably > set a priority just for the low priority class, so that it becomes > more obvious what is intended by this setting here. > > That what you wanted? > > Regards > Andreas Klauer Thank you. Yes, that is exactly what I wanted. It was also every bit as understandable as I expected, so THANK YOU again. I thrashed with this because when I set it up with only a 1:1 (where 1:2 is now), NOTHING ever was recorded in the root and no borrowing would occur. The more I thrashed, the more confused I became. With this, I think I can fix it. -- gypsy _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
