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From: egisin@orchid.UUCP
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: sockets vs low-level interfaces (was Re: standard interface)
Message-ID: <11697@orchid.waterloo.edu>
Date: Thu, 12-Nov-87 18:52:00 EST
Article-I.D.: orchid.11697
Posted: Thu Nov 12 18:52:00 1987
Date-Received: Sat, 14-Nov-87 11:47:06 EST
References: <11631@orchid.waterloo.edu> <8711110620.AA24292@violet.berkeley.edu>
Organization: U of Waterloo, Ontario
Lines: 7

When I rcp a large file between two idle BSD machines (785 or sun 3/50),
there is no idle time. Read or write never blocks.
The large window size (4K) is an important factor here.

Also, if you just layer a socket library on a low-level (upcall) interface,
you probably won't get as good performance as a tcp/ip designed with
a socket interface from the beginning.