Path: utzoo!utgpu!watserv1!watmath!att!occrsh!uokmax!apple!julius.cs.uiuc.edu!wuarchive!decwrl!sgi!artibee@noangel.wpd.sgi.com
From: artibee@noangel.wpd.sgi.com (Mary Artibee)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: tcp/ip performance
Message-ID: <69032@sgi.sgi.com>
Date: 11 Sep 90 17:44:11 GMT
Sender: guest@sgi.sgi.com
Lines: 41
Cc: artibee@noangel.wpd.sgi.com

> I am interested to some tests for doing performance
> evaluation of TCP/IP, any suggestions ?

You might consider "ttcp"...

>From vjs@rhyolite.wpd.sgi.com Sat May 12 19:04:05 1990 (Vernon Schryver)
Organization: Silicon Graphics, Inc., Mountain View, CA
Newsgroups: comp.protocols.tcp-ip
Subject: Re: "ttcp" program

Ttcp is handy for tuning a TCP or UDP implementation.

Versions of ttcp can be found in sgi/src on sgi.sgi.com, currently
192.48.153.1.  ttcp.c.brl is the most recent BRL version I've seen.
Ttcp.shar is from last August.  Ttcp.c is our current understanding of what
was acceptable to BRL.  It includes controls for buffer alignment and other
things.  By default it is a file transfer program, needing '-s' to make it
generate and sink data as a test program.

I think there are also versions available from BRL, perhaps on brl.mil.
They are probably newer than sgi:.../ttcp.c.brl.

Ttcp has never appeared in comp.sources.unix, although I understood from
the moderator that it would someday.  If you buy a Silicon Graphics "IRIS",
you'll find ttcp.c among other example and test programs in
/usr/people/4Dgifts.

There was some hassle with the port number.  The original port 2000
conflicted with a certain solar window manager, currently the default
window manager for SGI.  BRL and SGI checked with the Net Gods about
getting an official port number for ttcp, but failed.

Be careful to understand the numbers people give you.  Not long ago a
vendor trying to sell stuff gave me what I thought were some good numbers.
A few weeks later they happened to mention to some of my colleagues that
the numbers were obtained by summing some simultaneous tests.
It is as they say, "lies, damn lies, and benchmarks."

Vernon Schryver
Silicon Graphics
vjs@sgi.com