From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.5-pre1 (2020-06-20) on ip-172-31-74-118.ec2.internal X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=BAYES_00,FROM_ADDR_WS autolearn=no autolearn_force=no version=3.4.5-pre1 Date: 20 Nov 91 14:55:15 GMT From: elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!convex!dale@ames.arc.nasa.gov ( Dale Lancaster) Subject: Re: Real-Time Scheduling and Ada Message-ID: List-Id: In <35430@as0c.sei.cmu.edu> tar@sei.cmu.edu (Thomas Ralya) writes: > 2) in 25 years of building real time systems, I've never heard of a real > time system using either of the dynamic priority scheduling techniques. > (I'm sure they're out there somewhere, but I wonder if they are in > wide-spread use.) I know of one place that used it for handling multiple realtime flight simulations at the same time on the same computer (earliest deadline). However you could not have an abritary number of processes, you had to carefully make sure there were enough time slices to service all compute needs for all processes running. It seems to have worked well, but they are now moving towards multi-processors with one process per processor. dale -- =============================================================================== Dale M. Lancaster Work: 214-497-4581 Convex Computer Corporation Fax: 214-497-4848 Product Manager Internet: dale@convex.com