Path: utzoo!utgpu!cunews!bnrgate!brchh104!brchs1!bnr.ca!rice.edu!sun-spots-request
From: bmskc!oz!paul@uunet.uu.net (Paul Evan Matz)
Newsgroups: comp.sys.sun
Subject: Process "Class":  Timesharing or Realtime;  Is this for real?
Keywords: No Digest Subjects in Unmoderated Mode
Message-ID: <3601@brchh104.bnr.ca>
Date: 5 Jun 91 14:17:00 GMT
Sender: news@brchh104.bnr.ca
Organization: Sunspots, Pseudo-Unmoderated
Lines: 33
Approved: sun-spots@rice.edu
X-Original-Date:    Fri, 24 May 91 14:07:06 EDT

Newsgroups: comp.sys.sun
Distribution: na
Keywords: process class, realtime, realertime

At an Sun OEM developer's conference in the spring of 1990, there was
panel discussion which touched on some impending SunOS/SysVR4
functionality regarding "realer time" aspects of processes.  As I
recall, the plan was to allow classification of processes as either
"Timesharing" or "Realtime";  Timesharing processes would be like the
garden variety Unix process.  They get pre-empted after their slice of
CPU time.  Realtime processes were to be prioritized (20 levels), and
would be allowed to run until they blocked.  I don't remember if a
higher priority process became ready while another was running whether
the current process was pre-empted.  Sounded kind of interesting.

I was wondering what the current state of this functionality is.  Can't
seem to find anything in the 4.1.1 manpages that refer to this.  Is it
in SVR4?  Am I dreaming?

Thanks (wishful thinking).

Regards,
 ____________________________________________________________
| Paul E. Matz, Principal Engineer, PPG Biomedial Systems    |
|   RR 2, Box 55, 26 Lewis Road, Pound Ridge, NY, 10576      |
|   Phone: 914-234-0745, or 914-234-0661                     |
| (in KS:)                                                   |
|   PO Box 15955, 16505 W. 113 Street, Lenexa, Kansas  66215 |
|   Phone: 913-894-7500 x7179  Fax: 913-894-7600             |
| email: {...}!uunet!bmskc!paul or paul@bmskc.ppg.com        |
|____________________________________________________________|