From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=0.6 required=5.0 tests=BAYES_00,TO_NO_BRKTS_FROM_MSSP autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,216b18d81cce4f75 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-06-29 07:59:18 PST Path: archiver1.google.com!newsfeed.google.com!sn-xit-02!supernews.com!nntp-relay.ihug.net!ihug.co.nz!out.nntp.be!propagator-dallas!news-in-dallas.newsfeeds.com!newsranger.com!www.newsranger.com!not-for-mail Newsgroups: comp.lang.ada From: Ted Dennison References: <%3H_6.416$Kf3.3173@www.newsranger.com> <9hfgrm$ngd$1@nh.pace.co.uk> <3B3B6D4C.5DEC7D52@online.no> <9hfv15$s59$1@nh.pace.co.uk> <9hfvo1$sbd$1@nh.pace.co.uk> <9hhv2m$ivm$1@nh.pace.co.uk> Subject: Re: Ada Microkernel? Message-ID: <4J0%6.1684$Kf3.17425@www.newsranger.com> X-Abuse-Info: When contacting newsranger.com regarding abuse please X-Abuse-Info: forward the entire news article including headers or X-Abuse-Info: else we will not be able to process your request X-Complaints-To: abuse@newsranger.com NNTP-Posting-Date: Fri, 29 Jun 2001 10:59:12 EDT Organization: http://www.newsranger.com Date: Fri, 29 Jun 2001 14:59:12 GMT Xref: archiver1.google.com comp.lang.ada:9257 Date: 2001-06-29T14:59:12+00:00 List-Id: In article <9hhv2m$ivm$1@nh.pace.co.uk>, Marin David Condic says... > >My OS book from back in my college days is so old, I don't think it would be >anywhere close to up to date with modern OS theory. That's why I'm asking >for a recommendation. Mine is only about 4 years old, but I'm getting the feeling that's ancient history too. :-( It talks a lot about MACH, but doesn't mention L4. >"switch selectable" IOW, it would be useful to make WindowsNT have a >"Real-Time" mode so you could run critical processes on it, yet have all >the tools & services available to you that programming in non-real-time >usually does. Indeed, there are third-party products to do just that. (From >what I've seen, they tend to duplicate most of the Windows API, put a RTOS >under it, then run Windows as a lower priority process.) RTX. The commercial sims we build in-house are all moving to it. I suspect I'll become quite familiar with it in the next few months. Who knows, I might even take a crack at a Gnat port someday.. >I think the biggest area of contention between the two would be the >scheduler. I don't see how things like device drivers, interrupt processing, I was thinking you ought to be able to somehow mark a process as "non time-slicing" or somesuch so that it could be scheduled along with normal user processes, but still be realtime. Any real-time process is probably going to be higher-priority than a user process, but it could still use the same scheduler this way. But I'm not an expert in this field, so I'm guessing there may be some instrinsic problems I don't see. --- T.E.D. homepage - http://www.telepath.com/dennison/Ted/TED.html home email - mailto:dennison@telepath.com