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From: mikkel@cg-d.UUCP
Newsgroups: comp.arch,misc.wanted
Subject: Tightly-coupled, multi-processor UNIX systems?
Message-ID: <280@cg-d.UUCP>
Date: Thu, 5-Mar-87 12:01:17 EST
Article-I.D.: cg-d.280
Posted: Thu Mar  5 12:01:17 1987
Date-Received: Sat, 7-Mar-87 01:46:16 EST
Organization: Compugraphic, Wilmington, Mass.
Lines: 27
Xref: utgpu comp.arch:519 misc.wanted:607


For the last three or four years, I've heard rumors of a very
successful multi-processor UNIX system implemented at some (sub)set of
the following schools: {cmu,yale,purdue}.

The processors, I believe, were semi-tightly connected, meaning
independent caches but operating from a common physical memory address
space and a common set of peripherals.  As the strategy was explained
to me, one processor ran the kernel, having total access to the
internal data structures.  All system calls, from all processes on all
processors, were directed to the designated kernel processor.

Does anyone have experience with such a system?  If so, where can one
find appropriate references?

Thanks.  As usual, I'll collect email response and forward to those
interested in ease-dropping.

Yours,

	Carl Mikkelsen


	Carl Mikkelsen                   ..!decvax!cg-d!mikkel
	Compugraphic Corporation         (617) 658-5600 x 5220
	200 Ballardvale St.		 {Not responsible for}
	Wilmington, Ma. 01887            {much except myself.}