Newsgroups: comp.realtime
Path: utzoo!utgpu!watserv1!watmath!watmsg!sccowan
From: sccowan@watmsg.uwaterloo.ca (S. Crispin Cowan)
Subject: Re: real-time multicomputer systems
Message-ID: <1990May25.192221.25494@watmath.waterloo.edu>
Sender: daemon@watmath.waterloo.edu (Owner of Many System Processes)
Organization: University of Waterloo
References: <4228@hcx1.SSD.CSD.HARRIS.COM>
Date: Fri, 25 May 90 19:22:21 GMT
Lines: 27

In article <4228@hcx1.SSD.CSD.HARRIS.COM> steve@SSD.CSD.HARRIS.COM (Steve Brosky) writes:
>CX/RT, from Harris Computer Systems, is a Unix compatible operating system that
>runs on the Night Hawk platform: a tightly-coupled, shared-bus symmetric 
>multiprocessor containing up to 8 MC68030 CPUs, per-processor external caches
>and local memories, and a large global memory.  All times listed below 
>are for a 20MHz 68030.
[stuff]
>* fast context switch times -- 40-60 microseconds

This is obviously crucial to real-time response, and seems much faster
than conventional Unix context switching time.  How did you get Unix to
context switch so quickly?

Crispin
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