From owner-freebsd-net  Thu Mar 25  9:47:23 1999
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From: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
Message-Id: <199903251351.OAA12974@labinfo.iet.unipi.it>
Subject: Re: Dummynet
To: mbretter@sbox.tu-graz.ac.at (Michael Bretterklieber)
Date: Thu, 25 Mar 1999 14:51:32 +0100 (MET)
Cc: freebsd-net@FreeBSD.ORG
In-Reply-To: <99032516440600.00307@babsi.tu-graz.ac.at> from "Michael Bretterklieber" at Mar 25, 99 04:21:10 pm
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> > > I added: pipe 1 ip from A to B
> > > 
> > > and a bw of 64KBytes/s results in an effective bw of 2.5KBytes/s 
> > > (counted via ftp)
> > > 128KBytes/s -> 5 KBytes/s
> > > 256KBytes/s -> 10 KBytes/s
> > > etc...?!
> > 
> > send me the output of "ipfw show" and "ipfw pipe show"
> > plus how big is the file -- for a very short one you won't be able to
> > measure the real throughput using ftp because of tcp slow start.
> > 
> > 	luigi
> PC1              Bridge          PC2
> |----|          |---------|     |------|
> | xl0|----------|ed1   ed0|-----|      |
> |----|          |---------|     |------|
> 192.168.0.238      no IP         192.168.0.96
> 
> I transmitted one file with 56940 Bytes from PC1 to PC2 via ftp
> in 13.24 sec. (4.30 KByte/s):
> 
> Here is the output from "ipfw show":
> 00010  69 75877 pipe 1 ip from 192.168.0.238 to 192.168.0.96
> 00150   0     0 allow ip from any to any via lo0
> 00200   0     0 deny ip from any to 127.0.0.0/8
> 65535  12     0 allow ip from any to any
> 
> Here is the output from "ipfw pipe show":
> 00001: 1.000 Mbit/s  0 ms 100 sl. -- 10 pkts (352720 B) 0 drops

there must be some problem somewhere, are you sure you have the latest
bridge.c ipfw.c and ip_dummynet.c and binaries are derived
from them -- it makes no sense
that you have 10 pkts in the queue and certainly
they cannot sum up to over 300Kbytes.
(it might well be my fault... can you refresh me on your
os and the version of the above files... in doubt rm kernel bridge.o
ipfw.o ip_dummynet.o from your compile dir and rebuild one.)

	luigi


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