[LARTC] how to read the stats

[LARTC] how to read the stats

[Alexander Samad]

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Hi

I have setup iproute2 and need a bit of help reading the stats from it


===== output
qdisc htb 1: r2q 10 default 20 direct_packets_stat 0 ver 3.17
 Sent 547326809 bytes 1342627 pkts (dropped 9303, overlimits 2817572
requeues 0) 
 backlog 46p 
qdisc sfq 10: limit 128p quantum 1514b flows 128/1024 perturb 10sec 
 Sent 41874343 bytes 730889 pkts (dropped 0, overlimits 0 requeues 0) 
qdisc sfq 20: limit 128p quantum 1514b flows 128/1024 perturb 10sec 
 Sent 10136008 bytes 69886 pkts (dropped 0, overlimits 0 requeues 0) 
qdisc sfq 30: limit 128p quantum 1514b flows 128/1024 perturb 10sec 
 Sent 495316458 bytes 541852 pkts (dropped 9303, overlimits 0 requeues
0) 
 backlog 46p 


>>>> This I belive is my parent class is has access to the whole 64Kbit
class htb 1:1 root rate 64Kbit ceil 64Kbit burst 80b/8 mpu 0b overhead
0b cburst 1507b/8 mpu 0b overhead 0b level 7 
 Sent 542500093 bytes 1342581 pkts (dropped 0, overlimits 0 requeues 0) 
 rate 7201bit 20pps 
 lended: 322826 borrowed: 0 giants: 0
 tokens: -228224 ctokens: -45568

class htb 1:10 parent 1:1 leaf 10: prio 1 quantum 8 rate 57Kbit ceil
64Kbit burst 80b/8 mpu 0b overhead 0b cburst 1507b/8 mpu 0b overhead 0b
level 0 
 Sent 41874343 bytes 730889 pkts (dropped 0, overlimits 0 requeues 0) 
 rate 681bit 12pps 
 lended: 730878 borrowed: 11 giants: 0
 tokens: 2966 ctokens: 185856

class htb 1:20 parent 1:1 leaf 20: prio 2 quantum 8 rate 32Kbit ceil
57Kbit burst 80b/8 mpu 0b overhead 0b cburst 71b/8 mpu 0b overhead 0b
level 0 
 Sent 10136008 bytes 69886 pkts (dropped 0, overlimits 0 requeues 0) 
 rate 302bit 1pps 
 lended: 68718 borrowed: 1168 giants: 0
 tokens: -149248 ctokens: -73584


>>>> this is the low bandwidth class (bittorrent etc)
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 !


This is on a patched debian 2.6.8 kernel (pom-ng patch'ed) and iproute2-ss040831

Thanks
Alex


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Re: [LARTC] how to read the stats

[Stef Coene]

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@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
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Re: [LARTC] how to read the stats

[Alexander Samad]

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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@docum.org
> ?"Using Linux as bandwidth manager"
> ? ? ?http://www.docum.org/
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
> 

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