LARTC - Jul 2002 - [tcng] drawing with gnuplot

hi,

Is there a way with tcsim to see how different channels got used i.e. say I have
three channels

egress {
	class(<$a>) if ip_src == 192.168.0.1;
	class(<$b>) if ip_src == 192.168.0.2;
	class(<$c>) if ip_src == 192.168.0.3;

	htb(...) {
		$a = class { htb(rate X1, ceil Y1 ...) };
		$b = class { htb(rate X2, ceil Y2 ...) };
		$c = class { htb(rate X3, ceil Y3 ...) };
	}
}

now I want to "send" alot of packets in different speeds from these
three addreses and see how channels got used when borrowing happens and in what
proportions .... as I saw in the examples of the tcsim i see only E,D stuff...
in fact the examples are very hard to undersand...
I read the whole tcng there is no one full example of say cbq and/or tbf usage
(for beginners :") ).  :"(

thanx alot

PS. I got errors on "make test", tommorow will save it on fdd and will
post them on the list ....
There is one good news HTB is included in Mandrake 8.2 :"), so i dont need
to patch.
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raptor@unacs.bg wrote:
> Is there a way with tcsim to see how different channels got used i.e. say
> I have three channels
There''s no general way to distinguish classes (*). However, since
you select by source IP address, you can let tcsim_filter split flows
by that:

tcsim ... | tcsim_filter ... src | tcsim_plot

(*) In principle, I could export skb->tc_index, which is always set
    when using the egress or ingress qdiscs, but since skb->tc_index
    gets assigned some more-or-less arbitrary values, additional
    information would be needed to make this data useful. Perhaps
    something to consider after switching from tcsim to umlsim.
> I read the whole tcng there is no one full example of say cbq and/or
> tbf usage (for beginners :") ).  :"(
Not sure if this helps, but there is examples-ng/tbf

In general, the tcng documentation doesn''t try to explain how to use
the qdiscs (semantics, parameters, etc.), since all that is basically
the same as with "tc".
> PS. I got errors on "make test", tommorow will save it on fdd and
will
> post them on the list ....
"make test" errors are always interesting :-)

- Werner

-- 
  _________________________________________________________________________
 / Werner Almesberger, Buenos Aires, Argentina         wa@almesberger.net /
/_http://icapeople.epfl.ch/almesber/_____________________________________/
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