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Date:      Wed, 6 Dec 2000 07:12:09 GMT
From:      Cliff Sarginson <cliff@raggedclown.net>
To:        Cliff Sarginson <cliff@raggedclown.net>, Alfred Perlstein <bright@wintelcom.net>, parkpark <parkpark@home.com>, questions@FreeBSD.ORG
Subject:   Re: theoretical limit for TCP/IP connections
Message-ID:  <E143YkL-0000Co-00@post.mail.nl.demon.net>

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> > * parkpark <parkpark@home.com> [001205 20:50] wrote:
> > > 
> > > Pleaes Help me to investigate the theoretical limit for TCP/IP
> > > connections over a 100Mbps line. I like to  know what the line
> > > capacity is for a client which does: connect(), write(), close(),
> > > and the server does: accept(), read(), close().  These calculations
> > > are complicated, but I'm sure soneone can find me some snaswers.
> > > Please  hemp me to do the calculations as soon as possible as this
> > > will give me a better idea of how good my current performance is
> > > compared to the theoretical limit for Freebsd!.
> > 
> > Please wrap lines at 70 characters.
> > 
> > Er, I've gotten full 100mbit with not very fast pentium machines.
> > 
> > I'm not sure what you mean exactly by your question though.
> > 
Or do you mean actual connections, doing nothing in particular ?
Better clarify !

> I presume what you are really asking is about the efficiency of
> the protocol implementations from FBSD.
> I guess there are programs out there. But what exactly are you 
> comparing it with ?
> 
> An easy test would be to do some large file transfers I would have thought.
> Maybe some NFS copying. Set up a controlled environment and try it out.
> 
> On the other hand since you have heard of accept,connect and other socket
> level system calls you could write your own test program ! That is not
> very difficult to do. (if you want to pay me, I will write them for you :).
> 
> 
> Remember there are a lot of things going on here.
> 100Mbits is the hardware spec. of the ethernet, the raw bit transfer rate.
> There will also be the TCP/IP overhead.
> There will also be the application protocol overhead.
> The quality of your network hardware
> 
> Etc.
> 
> Let us know what you are comparing it with...
> 
> Cliff
> 
> 
> 
> 
> 
> 
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