Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!decwrl!sgi!karsh@trifolium.esd.sgi.com
From: karsh@trifolium.esd.sgi.com (Bruce Karsh)
Newsgroups: comp.sys.sgi
Subject: Re: Don't want to be interrupted
Message-ID: <101516@sgi.sgi.com>
Date: 4 May 91 14:37:42 GMT
References: <15332@darkstar.ucsc.edu>
Sender: guest@sgi.sgi.com
Reply-To: karsh@trifolium.sgi.com (Bruce Karsh)
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 20

In article mmcohen@ssyx.ucsc.edu (Michael M. Cohen) writes:

>While I am rendering real time video to NTSC tape,
>I don't want anything to slow me down to below 30 fps.
>This slowdown can occur if I move the mouse, if someone
>logs in, if mail arrives, the disk updates etc...
>Is there an easy way to lock out all distractions
>temporarily? Perhaps someone has a shell to find
>demons and stop them (and another to later bring them
>back to life)? Might be necessary to temporarily
>incapacitate the scheduler and swapping also (application
>should have no problem fitting in existing memory)?
>[machine id 4D310VGX-FX irix 3.3.2 16mb]

You can do pretty by using the npri command to give your process a high
non-degrading priority or by using the schedctl system call.  You can also
lock your process in memory by using the plock system call.

			Bruce Karsh
			karsh@sgi.com