Re: how to read the stats

[Alexander Samad <alex@xxxxxxxxxxxx>]

Hi

okay



#!/bin/bash

#
# Script to test TC

IF=${IF:-'eth0'}
SPEED=64
#
# 327b for 256 kbits (1K)
# 131K burst for 100Mb/s
# 12K burst for 10Mb/s
# pipe size /100 /8
BURST=163
BURST=$[$SPEED*1024/100/8]
MTU=1600
MTU=1500


TC='/sbin/tc'
TC='/usr/local/bin/tc'

tc_start2(){
	# install root HTB, point default traffic to 1:20 

	tc qdisc add dev $IF root handle 1: htb default 20

	# shape everything at $SPEED speed - this prevents huge queues in your
	# DSL modem which destroy latency:

	tc class add dev $IF parent 1: classid 1:1 htb rate ${SPEED}kbit ceil ${SPEED}kbit burst ${BURST}b mtu $MTU

	# high prio class 1:10:

	tc class add dev $IF parent 1:1 classid 1:10 htb rate $[9*${SPEED}/10]kbit ceil ${SPEED}kbit burst ${BURST}b prio 1 mtu $MTU quantum 8

	# bulk & default class 1:20 - gets slightly less traffic, 
	# and a lower priority:

	tc class add dev $IF parent 1:1 classid 1:20 htb rate $[5*${SPEED}/10]kbit ceil $[9*${SPEED}/10]kbit burst $[10*${BURST}/10]b cburst $[9*${BURST}/10]b prio 2 mtu $MTU quantum 8

	# for BTTorrent

	tc class add dev $IF parent 1:1 classid 1:30 htb rate $[4*${SPEED}/10]kbit ceil $[8*${SPEED}/10]kbit  burst $[8*${BURST}/10]b cburst $[6*${BURST}/10]b  prio 3 mtu $MTU quantum 8

	# Filters
	# both get Stochastic Fairness:
	tc qdisc add dev $IF parent 1:10 handle 10: sfq perturb 10
	tc qdisc add dev $IF parent 1:20 handle 20: sfq perturb 10
	tc qdisc add dev $IF parent 1:30 handle 30: sfq perturb 10

	# TOS Minimum Delay (ssh, NOT scp) in 1:10:
	tc filter add dev $IF parent 1: protocol ip prio 10 u32 \
		match ip tos 0x10 0xff \
		flowid 1:10

	# ICMP (ip protocol 1) in the interactive class 1:10 so we 
	# can do measurements & impress our friends:
	tc filter add dev $IF parent 1: protocol ip prio 10 u32 \
		match ip protocol 1 0xff \
		flowid 1:10

	# To speed up downloads while an upload is going on, put ACK packets in
	# the interactive class:

	tc filter add dev $IF parent 1: protocol ip pref 1 u32 \
		match ip protocol 6 0xff \
		match u8 0x05 0x0f at 0 \
		match u16 0x0000 0xffc0 at 2 \
		match u8 0x10 0xff at 33 \
		flowid 1:10


	#  limit BTTorent to flow :30
	# want to match all packets that have a source of 6880-6888
	# as I can only match/rate limit out going
	tc filter add dev $IF parent 1: protocol ip prio 10 u32 \
		match ip protocol 6 0xff \
		match ip sport 6880 0xfff0 \
		flowid 1:30

#		match u16 0x1ae0 0xfff0 at 20 \

# Match firewall marks
	tc filter add dev $IF parent 1: protocol ip pref 5 handle 4 fw flowid 1:30

#	# For pings !
#	tc filter add dev eth0 parent 1: protocol ip prio 100 u32 match ip protocol 1 0xFF flowid 1:10

	# rest is 'non-interactive' ie 'bulk' and ends up in 1:20

}

tc_start(){
	tc_start2
}

tc_stop(){
	$TC qdisc del dev $IF root
}

tc_show(){
	$TC -s -d qdisc show dev $IF
	$TC -s -d class show dev $IF
	$TC -s -d filter show dev $IF
}

case "$1" in
	start)
		tc_start
		;;
	stop)
		tc_stop
		;;
	restart)
		tc_stop
		tc_start
		;;
	show)
		tc_show
		;;
	*)
		tc_show
		#exit 1
		;;
esac

exit 0


Thanks

On Thu, Oct 21, 2004 at 09:18:29PM +0200, Stef Coene wrote:
> On Thursday 21 October 2004 11:59, Alexander Samad wrote:
> > class htb 1:30 parent 1:1 leaf 30: prio 3 quantum 8 rate 25Kbit ceil
> > 51Kbit burst 63b/8 mpu 0b overhead 0b cburst 47b/8 mpu 0b overhead 0b
> > level 0
> >  Sent 495316458 bytes 541852 pkts (dropped 9303, overlimits 0 requeues
> > 0)
> >
> > >>> THIS is the line I have problems understanding
> > >>> I read it as 6190bit/sec which seems to be way lower than the 25Kbit
> > >>> set for the rate and much lower than the ceil
> > >>> so why do I have a backlog
> >
> >  rate 6190bit 7pps backlog 46p
> >  lended: 220159 borrowed: 321647 giants: 0
> >  tokens: -493609 ctokens: -242500
> >
> >
> > Having said all that it does seem to be limiting to 25Kbit, with burst
> > upto 51 !
> Can you post the executed tc commands?  Much easier for us to see what you 
> did.
> 
> Stef
> 
> -- 
> stef.coene@xxxxxxxxx
> ?"Using Linux as bandwidth manager"
> ? ? ?http://www.docum.org/
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> LARTC mailing list / LARTC@xxxxxxxxxxxxxxx
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>

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