From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stef Coene <stef.coene@docum.org>
Date: Sun, 16 Nov 2003 11:09:27 +0000
Subject: Re: [LARTC] htb with negative number of tokens
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To: lartc@vger.kernel.org

On Sunday 16 November 2003 01:49, Jacek Bilski wrote:
> Hello!
>
> I run my script, then check the results. Pieces of output:
>
> <result>
>
>  root@arthur:/etc/init.d# tc -s -d class show dev imq0
> class htb 1:1010 parent 1:1 rate 7Kbit ceil 50Kbit burst 999b/8 mpu 0b
> overhead 0b cburst 999b/8 mpu 0b overhead 0b level 6
>  Sent 13646 bytes 42 pkts (dropped 0, overlimits 0)
>  rate 106bps
>  lended: 0 borrowed: 22 giants: 0
>  tokens: -155926 ctokens: -95231
>
> class htb 1:1023 parent 1:1020 leaf 1023: prio 3 quantum 1000 rate 2Kbit
> ceil 50Kbit burst 999b/8 mpu 0b overhead 0b cburst 999b/8 mpu 0b
> overhead 0b level
> 0
>  Sent 315580 bytes 964 pkts (dropped 0, overlimits 0)
>  rate 5485bps 16pps backlog 44p
>  lended: 60 borrowed: 860 giants: 0
>  tokens: -3424256 ctokens: -62464
>
> class htb 1:1032 parent 1:1030 leaf 1032: prio 2 quantum 1000 rate 3Kbit
> ceil 50Kbit burst 999b/8 mpu 0b overhead 0b cburst 999b/8 mpu 0b
> overhead 0b level
> 0
>  Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
>  lended: 0 borrowed: 0 giants: 0
>  tokens: 2133332 ctokens: 128000
>
> class htb 1:1045 parent 1:1040 leaf 1045: prio 5 quantum 1000 rate 1Kbit
> ceil 50Kbit burst 999b/8 mpu 0b overhead 0b cburst 999b/8 mpu 0b
> overhead 0b level
> 0
>  Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
>  lended: 0 borrowed: 0 giants: 0
>  tokens: 6400000 ctokens: 128000
>
> class htb 1:1054 parent 1:1050 leaf 1054: prio 4 quantum 1000 rate 1Kbit
> ceil 50Kbit burst 999b/8 mpu 0b overhead 0b cburst 999b/8 mpu 0b
> overhead 0b level
> 0
>  Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
>  lended: 0 borrowed: 0 giants: 0
>  tokens: 6400000 ctokens: 128000
>
> class htb 1:1 root rate 50Kbit ceil 50Kbit burst 999b/8 mpu 0b overhead
> 0b cburst 999b/8 mpu 0b overhead 0b level 7
>  Sent 322094 bytes 1014 pkts (dropped 0, overlimits 0)
>  rate 5593bps 16pps
>  lended: 803 borrowed: 0 giants: 0
>  tokens: -186353 ctokens: -186353
>
> </result>
>
> 1. Why do I have negative number of tokens in some classes, especially
> 1:1 ? I don't think it should be possible.
Why not?  Class 1:1 has child classes.  These child classes are able to sen=
d=20
pckets as long as they have tokens.  Even if the parent has no tokens left,=
=20
they still can send packets as long as they have tokens.  So they can drag =

the parent tokens negative.
But I don't understand why class 1:1023 has negative tokens?  Is this is a =

leaf class ?

> 2. Probably connected to question 1, having rate=CEilPkbit why can I
> still download stuff at rate ~10Kbyte/s?
Normally you shouldn't.

> (If output isn't enough I can send my script which is quite big,
> ~14Kbytes)
Can you send us only the tc class/qdisc commands ?

Stef

--=20
stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.openprojects.net

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