Re: [LARTC] htb ceiling

["Gavin" <gavin@raha.com>]

Lubomir Bulej has now released v0.8.3 of his excellent htb.init script which
fixes the problem with the ordering of the output.

Gavin

----- Original Message -----
From: "Martin Devera" <devik@cdi.cz>
To: "Gavin" <gavin@raha.com>
Cc: "Stef Coene" <stef.coene@docum.org>; <LARTC@mailman.ds9a.nl>
Sent: Friday, April 05, 2002 3:10 PM
Subject: Re: [LARTC] htb ceiling


> you have error in conf. As you can see class 1:40 and 1:50 are
> added to the root not as 1:2 children.
> The output of htb.init is wrong - you can see that it uses 1:2
> class before it demands its create ...
> I don't know htb.init - you will have to contact maintainer
> with bugrerport probably ;)
> devik
>
> On Fri, 5 Apr 2002, Gavin wrote:
>
> > I tried it with a minimal config - two classes, each with rate: 256Kbit
and
> > ceiling: 512Kbit and one dest. IP address in each, as well as a default
> > class.  Each specified machine could only pull 256Kbit maximum, either
alone
> > or with the other downloading as well.
> >
> > Output of tc -s qdisc show dev eth1:
> >
> > qdisc sfq 50: quantum 1514b perturb 10sec
> >  Sent 7506464 bytes 4984 pkts (dropped 0, overlimits 0)
> >  backlog 6p
> >
> >  qdisc sfq 40: quantum 1514b perturb 10sec
> >  Sent 4275617 bytes 2829 pkts (dropped 0, overlimits 0)
> >  backlog 3p
> >
> >  qdisc sfq 10: quantum 1514b perturb 10sec
> >  Sent 287102 bytes 542 pkts (dropped 0, overlimits 0)
> >
> >  qdisc htb 1: r2q 100 default 10 dcache 0
> >  deq_util 1/1000000 deq_rate 125 trials_per_deq 0
> >  dcache_hits 0 direct_packets 0
> >  Sent 12069183 bytes 8355 pkts (dropped 0, overlimits 15537)
> >  backlog 9p
> >
> >
> > Output of tc -s class show dev eth1:
> >
> > class htb 1:10 root leaf 10: prio 0 rate 2Mbit ceil 2Mbit burst 15Kb
cburst
> > 4220b
> >  Sent 331368 bytes 678 pkts (dropped 0, overlimits 32)
> >  rate 107bps
> >  lended: 678 borrowed: 0 giants: 0 injects: 0
> >  tokens: 47825 ctokens: 13015
> >
> > class htb 1:2 root prio 0 rate 5Mbit ceil 5Mbit burst 15Kb cburst 8151b
> >  Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
> >  lended: 0 borrowed: 0 giants: 0 injects: 0
> >  tokens: 19199 ctokens: 10190
> >
> > class htb 1:40 root leaf 40: prio 0 rate 256Kbit ceil 512Kbit burst 15Kb
> > cburst 2254b
> >  Sent 4275671 bytes 2830 pkts (dropped 0, overlimits 0)
> >  rate 226bps
> >  lended: 2830 borrowed: 0 giants: 0 injects: 0
> >  tokens: 382801 ctokens: 27588
> >
> > class htb 1:50 root leaf 50: prio 0 rate 256Kbit ceil 512Kbit burst 15Kb
> > cburst 2254b
> >  Sent 8214460 bytes 5467 pkts (dropped 0, overlimits 0)
> >  rate 546bps
> >  lended: 5467 borrowed: 0 giants: 0 injects: 0
> >  tokens: 382801 ctokens: 27588
> >
> > Output of htb.init compile:
> >
> > tc qdisc del dev eth1 root
> > tc qdisc add dev eth1 root handle 1 htb default 10 r2q 100
> >
> > tc class add dev eth1 parent 1:2 classid 1:10 htb rate 2Mbit ceil 2Mbit
> > burst 15k
> > tc qdisc add dev eth1 parent 1:10 handle 10 sfq perturb 10
> >
> > tc class add dev eth1 parent 1:2 classid 1:40 htb rate 256Kbit ceil
512Kbit
> > burst 15k
> > tc qdisc add dev eth1 parent 1:40 handle 40 sfq perturb 10
> > tc filter add dev eth1 parent 1:0 protocol ip prio 100 u32 match ip dst
> > 10.0.0.20 classid 1:40
> >
> > tc class add dev eth1 parent 1:2 classid 1:50 htb rate 256Kbit ceil
512Kbit
> > burst 15k
> > tc qdisc add dev eth1 parent 1:50 handle 50 sfq perturb 10
> > tc filter add dev eth1 parent 1:0 protocol ip prio 100 u32 match ip dst
> > 10.0.0.150 classid 1:50
> >
> > tc class add dev eth1 parent 1: classid 1:2 htb rate 5Mbit burst 15k
> >
> >
> >
> > Gavin
> >
> >
> > ----- Original Message -----
> > From: "Martin Devera" <devik@cdi.cz>
> > To: "Stef Coene" <stef.coene@docum.org>
> > Cc: "Gavin" <gavin@raha.com>; <LARTC@mailman.ds9a.nl>
> > Sent: Friday, April 05, 2002 1:40 PM
> > Subject: Re: [LARTC] htb ceiling
> >
> >
> > > > > tc qdisc add dev eth1 root handle 1 htb default 10 r2q 100
> > > > > tc class add dev eth1 parent 1: classid 1:2 htb rate 5Mbit burst
15k
> > > > > tc class add dev eth1 parent 1:2 classid 1:40 htb rate 256Kbit
ceil
> > 512Kbit
> > > > > burst 15k
> > > > > tc qdisc add dev eth1 parent 1:40 handle 40 sfq perturb 10
> > > > > tc filter add dev eth1 parent 1:0 protocol ip prio 100 u32 match
ip
> > dst
> > > > > 10.0.0.2 classid 1:40
> > > > >
> > > > >  - this allows 10.0.0.2 to download at 256Kbit, even when it is
the
> > only
> > > > > machine doing any downloading.  I can affect this speed by
changing
> > the
> > > > > $rate, but changing $ceil has no effect whatsoever.
> > > > The ceil will prevent 10.0.0.2 to download faster then 512 kbit.
The
> > rate
> > > > will say how much 10.0.0.2 can download compare to the other classes
(so
> > the
> > > > other lines are also relevant :).
> > >
> > > No Stef,
> > > the rate is really measured - it is used as source for DRR weight
> > > (here it is used relative to other classes) and to see whether we
> > > need to borrow from parent - here absolute value matters.
> > > So that the example above should work and give 512k.
> > >
> > > Gavin, did you tried with only these classes present ? (to have
> > > maximaly simplified configuration which exhibits it).
> > > If yes and it really does only 256k then post
> > > tc -s {qdisc,class} show dev ethXX outputs ... as usual
> > > devik
> > >
> > >
> >
> >
> >
>
>

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