Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83 SMI; site ur-laser.uucp Path: utzoo!watmath!clyde!bonnie!akgua!sdcsvax!sdcrdcf!hplabs!hao!seismo!rochester!ur-laser!tomk From: tomk@ur-laser.uucp (Tom Kessler) Newsgroups: net.unix Subject: Re: RatFor on the IBM PC/AT Message-ID: <269@ur-laser.uucp> Date: Sat, 29-Dec-84 12:53:28 EST Article-I.D.: ur-laser.269 Posted: Sat Dec 29 12:53:28 1984 Date-Received: Mon, 31-Dec-84 02:16:45 EST References: <6821@brl-tgr.ARPA> Organization: Lab for Laser Energetics, Univ. of Rochester Lines: 19 >I've a question of my own about Unix/Xenix on the AT. Benchmarks have >shown only a 2-3 times speed advantage of the AT over the PC. If you use >a multi-user OS, doesn't the overhead pretty much eat up that advantage, >giving you in effect only PC capability? I've been told by people who have used Unix/Xenix on the AT (and seen the source) that the version of Xenix on the AT is just the 8086 version of Xenix with the 8286 in the AT running in 8086 compatibility mode with a few minor improvements. Hence it is not very surprising that the AT shows only a 2-3 times increase. One friend of mine said "You mean you're going to give this to paying customers?" when he first saw the Xenix 8286 Kernel. When you are running multiuser your probably better off using a PC. -- -------------------------- Tom Kessler {allegra |seismo }!rochester!ur-laser!tomk Laboratory for Laser Energetics Phone: (716)- 275 - 3786 250 East River Road 275 - 3194 Rochester, New York 14623