From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oliver Hookins Date: Mon, 09 Jan 2006 02:44:01 +0000 Subject: Re: [LARTC] HTB traffic shaping odd effects Message-Id: <43C1CDF1.8050805@anchor.com.au> List-Id: References: <43BE1D93.2040409@anchor.com.au> In-Reply-To: <43BE1D93.2040409@anchor.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Andy Furniss wrote: > Oliver Hookins wrote: > >> Hi, >> >> I'm trying to perform some (what I consider) basic traffic shaping on >> our network utilising HTB. I have mostly reused the example on the >> lartc.org site: >> >> tc qdisc add dev eth0 root handle 1: htb default 10 >> tc class add dev eth0 parent 1: classid 1:1 htb rate 100mbit burst 24k >> tc class add dev eth0 parent 1:1 classid 1:10 htb rate 50mbit ceil >> 80mbit burst 19k > > > burst 19k will limit you unless your HZ00 Our HZ is 512. >> tc class add dev eth0 parent 1:1 classid 1:20 htb rate 1mbit ceil >> 1mbit >> tc qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10 >> tc qdisc add dev eth0 parent 1:20 handle 20: sfq perturb 10 >> tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip src >> X.X.X.X flowid 1:20 >> >> So we have a total of 100mbit to be used, the default class 1:10 gets >> 50mbit and a ceiling of 80mbit whereas my test host X.X.X.X gets only >> 1mbit in any situation. Some rate limiting is definitely happening, >> but I am finding the outbound traffic is limited to 2mbit instead of >> 1mbit. If I change the rate (to say 10mbit) the outbound traffic gets >> up to again twice the rate (in this case 20mbit). > > > Not sure can you show output of tc -s -d class ls dev eth0 while it's > running at 2x speed. class htb 1:1 root rate 100Mbit ceil 100Mbit burst 24Kb/8 mpu 0b cburst 132644b/8 mpu 0b level 7 Sent 741267447736 bytes 735629628 pkts (dropped 0, overlimits 0) rate 4316188bps 22688pps lended: 489885589 borrowed: 0 giants: 0 tokens: -78 ctokens: 6677 class htb 1:10 parent 1:1 leaf 10: prio 0 quantum 200000 rate 50Mbit ceil 80Mbit burst 19Kb/8 mpu 0b cburst 106440b/8 mpu 0b level 0 Sent 740240463634 bytes 734522966 pkts (dropped 429910165, overlimits 0) rate 4233957bps 22358pps lended: 244988819 borrowed: 489885528 giants: 0 tokens: -293 ctokens: 6636 class htb 1:20 parent 1:1 leaf 20: prio 0 quantum 13107 rate 1Mbit ceil 1Mbit burst 2Kb/8 mpu 0b cburst 2Kb/8 mpu 0b level 0 Sent 755354078 bytes 755048 pkts (dropped 0, overlimits 0) rate 84198bps 321pps backlog 4p lended: 755220 borrowed: 61 giants: 0 tokens: -21517 ctokens: -21517 -- Regards, Oliver Hookins _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc