Re: [LARTC] Problems with HTB shaping

["Mindaugas Riauba" <mind@bi.lt>]

> >   I have some strange problems with shaping. Now I'm testing Linux as
> > shaping bridge. Redhat Linux 7.3, kernel plain 2.4.23 with latest HTB
patch
> > from devik and PSCHED_CLOCK_SOURCE changed to PSCHED_CPU.
> >
> >   Some output is at the end of the message. What is strange that
according
> > to interface statistics traffic is shaped more or less OK.
> >   48431590 - 48079196 = 352394 (~275kbps)
> >   But byte count reported by tc is lower.
> >   39061384 - 38778938 = 282446 (~220kbps)
> >
> >   But when I try to look into packets with tcpdump:
> > # tcpdump -c 10000 | fgrep -v $ip | wc -l
> > tcpdump: listening on br0
> >       5
> >
> >   So only 5 packets should go not through filter.
> >
> >   What I'm doing wrong?
> I'm not sure, but I think that the network statistics are counting every
bit
> that's been put on the wire.  And maybe this also includes retransmits.

  Linux box is only bridging traffic. So I think it should not generate some
additional traffic. Default class is also empty.

  Anyway if tc report is right then HTB has problems shaping traffic because
it shows only 220kbps of traffic when configured rate is 256kbps.

  Such behaviour is seen only when box is heavily bashed with UDP traffic
plus
at least one TCP session.

  Mindaugas

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