[LARTC] traffic shaper with htb and imq ==> bad latency

[LARTC] traffic shaper with htb and imq ==> bad latency

[ExElNeT]

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Hi!

I have configured traffic shaping with htb and imq but when i am downloading the latency for example on the Bnet class is very high .....
example:

65 kb/s download
best latency: 56ms
lateny on bnet class while downloading: 400 350 250 350 400 100 300 200 80 200 300 250 .....
To get informations about latency i am marking ping packets with iptables.

I want to play during other users downloading and i want to keep my voicechat useable ... i need low latency

It would be nice if you could help ... 

I am happy about every answer :)

using: gentoo p200mmx 64mb ram 2.4.20 kernel

my script:

### Traffic Shaper

## down 768kbit
## up   128kbit 

tc qdisc add dev $EXTIF root handle 1:0 htb default 13
tc class add dev $EXTIF parent 1:0 classid 1:1 htb rate 16kbps ceil 16kbps prio 0
# Gamevoice
tc class add dev $EXTIF parent 1:1 classid 1:11 htb rate 3kbps ceil 14kbps prio 0
# Bnet
tc class add dev $EXTIF parent 1:1 classid 1:12 htb rate 7kbps ceil 14kbps prio 1
# Normal
tc class add dev $EXTIF parent 1:1 classid 1:13 htb rate 3kbps ceil 14kbps prio 6
# Edonkey
tc class add dev $EXTIF parent 1:1 classid 1:14 htb rate 2kbps ceil 5kbps prio 7

tc qdisc add dev $IMQIF root handle 1:0 htb default 13
tc class add dev $IMQIF parent 1:0 classid 1:1 htb rate 86kbps ceil 86kbps prio 0
# Gamevoice
tc class add dev $IMQIF parent 1:1 classid 1:11 htb rate 3kbps ceil 84kbps prio 0
# Bnet
tc class add dev $IMQIF parent 1:1 classid 1:12 htb rate 7kbps ceil 84kbps prio 1
# Normal
tc class add dev $IMQIF parent 1:1 classid 1:13 htb rate 45kbps ceil 84kbps prio 6
# Edonkey
tc class add dev $IMQIF parent 1:1 classid 1:14 htb rate 24kbps ceil 50kbps prio 7

# Gamevoice
tc filter add dev $EXTIF parent 1: prio 0 protocol ip handle 11 fw flowid 1:11  
# Bnet
tc filter add dev $EXTIF parent 1: prio 0 protocol ip handle 12 fw flowid 1:12  
# Edonkey
tc filter add dev $EXTIF parent 1: prio 0 protocol ip handle 14 fw flowid 1:14

# Gamevoice
tc filter add dev $IMQIF parent 1: prio 0 protocol ip handle 21 fw flowid 1:11  
# Bnet
tc filter add dev $IMQIF parent 1: prio 0 protocol ip handle 22 fw flowid 1:12  
# Edonkey
tc filter add dev $IMQIF parent 1: prio 0 protocol ip handle 24 fw flowid 1:14

greetz
ExElNeT

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Re: [LARTC] traffic shaper with htb and imq ==> bad latency

[Stef Coene]

On Wednesday 26 February 2003 12:34, ExElNeT wrote:
> Hi!
>
> I have configured traffic shaping with htb and imq but when i am
> downloading the latency for example on the Bnet class is very high .....
> example:
>
> 65 kb/s download
> best latency: 56ms
> lateny on bnet class while downloading: 400 350 250 350 400 100 300 200 80
> 200 300 250 ..... To get informations about latency i am marking ping
> packets with iptables.
>
> I want to play during other users downloading and i want to keep my
> voicechat useable ... i need low latency
>
> It would be nice if you could help ...
>
> I am happy about every answer :)
Try to add a small fifo qdisc to your high priority class.

Stef

-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

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