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From: info-vax@ucbvax.ARPA
Newsgroups: fa.info-vax
Subject: TCP/IP and DECnet speeds
Message-ID: <2535@ucbvax.ARPA>
Date: Sun, 14-Oct-84 21:09:59 EDT
Article-I.D.: ucbvax.2535
Posted: Sun Oct 14 21:09:59 1984
Date-Received: Tue, 16-Oct-84 03:44:39 EDT
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Organization: University of California at Berkeley
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From: Lee Moore  

I don't have any figures on the speeds on the TWG or Berkeley TCP/IP
but I do have the following quote from the last Usenix conference.
The paper is called "4bsd Unix TCP/IP and VMS DECNET: Experience in
Negotiating a Peaceful Coexistance" (p323-5) by Van Jacobson et al
of Lawrence Berkeley Labs.  They are working with an early version
of SRI TCP/IP (now a product of TWG).

       "We are still in the process of system performance investigation
	but have some preliminary results.  It probably comes as no
	surprise (at least, to a Unix audience) that we find 4bsd TCP/IP
	has substantially better performance than VMS DECNET.  In our
	tests to date, the Unix throughput has been higher and CPU
	utilization lower than VMS.  The Eunice TCP/IP performance is
	not as good as the Unix performance, probably owing to the
	high `cost' of a VMS QIO. (...) We were suprised to find that,
	in most cases, the Eunice TCP/IP outperforms VMS DECNET in
	both throughput and CPU utilization."

Please, no flames to me!

=lee

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