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From: wunder@hpcea.HP (Walter R. Underwood)
Newsgroups: net.unix-wizards
Subject: Re: Looking for Real Time Unix
Message-ID: <2370004@hpcea.HP>
Date: Wed, 2-Jul-86 14:35:59 EDT
Article-I.D.: hpcea.2370004
Posted: Wed Jul  2 14:35:59 1986
Date-Received: Wed, 9-Jul-86 02:00:28 EDT
References: <63@rdlvax.UUCP>
Organization: HP Corporate Engineering - Palo Alto, CA
Lines: 14

HP-UX is a real-time Unix.  I am not a real-time wizard, but people
here have a lot of experience with real-time OS's, and put a lot of
careful effort into this kernel.

There was a paper on the subject at the Atlanta Usenix, "Decreasing
Realtime Process Dispatch Latency through Kernel Preemption." The work
was done for the Spectrum kernel (HP9000 Model 840, a hot machine), and
I don't know if it has made it to the 68000 kernel.  The 68000 machines
(HP9000 Model 320) do have real-time stuff, I just don't know whether
they have kernel preemption.

Walter Underwood
Not an official spokesman for
Hewlett-Packard