Re: [LARTC] HTB Rate and Prio (continued)

From: Andy Furniss <andy.furniss@dsl.pipex.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] HTB Rate and Prio (continued)
Date: Mon, 11 Jul 2005 18:44:40 +0000	[thread overview]
Message-ID: <42D2BE18.5010407@dsl.pipex.com> (raw)
In-Reply-To: <200507111126.j6BBQT5t007024@dhuumrelay0.mail.eu.uu.net>

Gael Mauleon wrote:
> Hi again,
> 
>  
> 
> I keep posting about my problem with HTB ->
> http://mailman.ds9a.nl/pipermail/lartc/2005q3/016611.html

I had a go with what you posted there over lan and with 2 tcp streams it 
behaves as expected (see below for exact test).

Can you reproduce the failiure shaping over a lan rather than your 
internet connection?

If your upstream bandwidth is sold as 2meg then ceil 2000kbit is likely 
to be too high.

You could also try specifying quantum = 1500 on all the leafs as you get 
it auto calculated from rates otherwise (you can see them with tc -s -d 
class ls ...). It didn't affect my test though.

If you are looking at htbs rate counters remember that they use a really 
long average (about 100 sec) so they can mislead.

I tested below with two netperf tcp send tests to ips I added to another 
  PC on my lan.

# /usr/local/netperf/netperf -H 192.168.0.60 -f k -l 60 & 
/usr/local/netperf/netperf -f k -H 192.168.0.102 -l 60 &

which gave -

Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^3bits/sec

  43689  16384  16384    60.09    1884.66
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^3bits/sec

  43689  16384  16384    60.22      51.58

The script -

QOSIN=eth0

tc qdisc del dev $QOSIN root &>/dev/null

tc qdisc add dev $QOSIN root handle 1:0 htb
tc class add dev $QOSIN parent 1:0 classid 1:1 htb rate 2000kbit

### SUBCLASS1

tc class add dev $QOSIN parent 1:1 classid 1:10 htb rate 750kbit ceil 
2000kbit prio 1

tc class add dev $QOSIN parent 1:10 classid 1:101 htb rate 250kbit ceil 
2000kbit prio 1

tc qdisc add dev $QOSIN parent 1:101 handle 101: pfifo limit 10

tc class add dev $QOSIN parent 1:10 classid 1:102 htb rate 250kbit ceil 
2000kbit prio 1

tc qdisc add dev $QOSIN parent 1:102 handle 102: pfifo limit 10

tc class add dev $QOSIN parent 1:10 classid 1:103 htb rate 250kbit ceil 
2000kbit prio 1

tc qdisc add dev $QOSIN parent 1:103 handle 103: pfifo limit 10

tc filter add dev $QOSIN parent 1:0 protocol ip u32 match ip dst 
192.168.0.102 flowid 1:102

###HIGH PRIO ###

tc class add dev $QOSIN parent 1:1 classid 1:50 htb rate 50kbit ceil 
2000kbit prio 0 quantum 1500

tc qdisc add dev $QOSIN parent 1:50 handle 50: pfifo limit 10

### LOW PRIO ###

tc class add dev $QOSIN parent 1:1 classid 1:60 htb rate 50kbit ceil 
2000kbit prio 5 quantum 1500

tc qdisc add dev $QOSIN parent 1:60 handle 60: pfifo limit 10

tc filter add dev $QOSIN parent 1:0 protocol ip u32 match ip dst 
192.168.0.60 flowid 1:60

Andy.

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