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Yacine

2004-Jun-13 13:24 UTC

Consider r2q change, why !?

Hi,

My system always complain with the warning below :
HTB: quantum of class 10099 is small. Consider r2q change.

I simply do not understand why...

Below my tc commands :
/sbin/tc qdisc del dev eth0 root
/sbin/tc qdisc add dev eth0 root handle 1 htb default 99

/sbin/tc class add dev eth0 parent 1: classid 1:2 htb rate 128Kbit

/sbin/tc class add dev eth0 parent 1:2 classid 1:10 htb rate 80Kbit ceil
128Kbit prio 0
/sbin/tc qdisc add dev eth0 parent 1:10 handle 10 sfq perturb 10
/sbin/tc filter add dev eth0 parent 1:0 protocol ip prio 100 u32 match ip
dst ***.***.***.*** classid 1:10

/sbin/tc class add dev eth0 parent 1:2 classid 1:99 htb rate 48Kbit ceil
48Kbit prio 7
/sbin/tc qdisc add dev eth0 parent 1:99 handle 99 sfq perturb 10

My default class quantum (99) is correct I guess :  quantum is >
1500 (my MTU).
If I change the rate of my default class to something >= 79 Kbit then it
work without any warning !?!?

I am just looking for an explanation as I''m lost here...

FYI :
#  tc -V
tc utility, iproute2-ss001007
#  uname -r
2.4.26
#  ip link sh eth0
3: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc htb qlen 1000
    link/ether 00:40:63:c9:b3:32 brd ff:ff:ff:ff:ff:ff

Thanks,
Yacine.

Clifford Payne

2004-Jun-13 16:01 UTC

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Re: Consider r2q change, why !?

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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http-equiv="Content-Type">
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</head>
<body bgcolor="#ffffff" text="#000000">
A little bit of searching brings up this page:
<a class="moz-txt-link-freetext"
href="http://www.docum.org/stef.coene/qos/faq/cache/31.html">http://www.docum.org/stef.coene/qos/faq/cache/31.html</a><br>
<br>
I hope that helps,<br>
Cliff<br>
<br>
Yacine wrote:
<blockquote cite="mid00f301c45149$c4cfed40$1002a8c0@windaube"
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  <meta http-equiv="Content-Type" content="text/html;
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name="GENERATOR">
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  <div><font face="Arial" size="2"><font
face="Times New Roman" size="3">Hi,<br>
  <br>
My system always complain with the warning below :<br>
HTB: quantum of class 10099 is small. Consider r2q change.<br>
...<br>
Thanks,<br>
Yacine.</font><br>
  </font></div>
</blockquote>
</body>
</html>
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