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From: van@LBL-CSAM.ARPA (Van Jacobson)
Newsgroups: comp.protocols.tcp-ip
Subject: 4.3bsd tcp code for Sun available
Message-ID: <8706182025.AA02976@lbl-csam.arpa>
Date: Thu, 18-Jun-87 16:25:45 EDT
Article-I.D.: lbl-csam.8706182025.AA02976
Posted: Thu Jun 18 16:25:45 1987
Date-Received: Sun, 21-Jun-87 17:24:02 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 30

A port of the 4.3bsd tcp code to Sun OS v3.3 is available
for anonymous ftp from host lbl-rtsg.arpa as compressed
tar file 4.3tcp4sun.tar.Z (~ 50KB).  This code reflects
what Berkeley is presently running (as of June 6th) and
includes all the bug fixes and performance enhancements
made since the 4.3bsd release.

In limitted testing we have found that the 4.3 code improves
local net performance by about a factor of two over the
code that came with Sun v3.3.  E.g., throughput on an ftp
between two Sun 3/50s went from 100KByte/sec to 190KByte/sec.

Most of the post-distribution changes in 4.3 have had to do
with performance over congested links (like the Arpanet).
We expected, and observed, a large performance improvement
over the Sun (nee 4.2bsd) code.  Unfortunately we couldn't
quantify the change:  In six file transfer trials over
the Arpanet at midday, the 4.3 code delivered an average of
1.2KB/sec.  The original Sun code timed out without completing
a transfer on all six trials.  Thus, we are postulating an
infinite improvement.

The tarchive contains objects for a 68020.  Since the tcp
code is Berkeley's and not in any way derived from Sun's
code, all the source is included.  Note that this is only
the 4.3 tcp and doesn't include the 4.3 fixes made to ip,
icmp or udp (this 4.3 tcp does not depend on any of these
fixes and will run in a Sun v3.3 system as-is).  

  - Van