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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,1c3d4536a687b7b0 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2000-09-02 15:54:44 PST Path: supernews.google.com!sn-xit-02!sn-east!supernews.com!news-feed.riddles.org.uk!newsengine.sol.net!newspump.sol.net!news.execpc.com!newspeer.sol.net!cpk-news-hub1.bbnplanet.com!news.gtei.net!newshub.northeast.verio.net!verio!newsfeed.mathworks.com!cyclone.swbell.net!nnrp3.sbc.net.POSTED!not-for-mail From: "Pat Rogers" Newsgroups: comp.lang.ada References: <39ADAE51.30550667@mtws.visicom.com> <39ADD3A3.381DEF17@ix.netcom.com> <39AF20CE.FDBDFFFE@mtws.visicom.com> <39AF2DEC.71D8B897@ix.netcom.com> Subject: Re: Ada 95 tasking problems with Ada 83 code X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.00.3018.1300 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.3018.1300 Message-ID: Date: Sat, 2 Sep 2000 17:54:25 -0500 NNTP-Posting-Host: 208.191.184.67 X-Complaints-To: abuseswbell.net X-Trace: nnrp3.sbc.net 967935271 208.191.184.67 (Sat, 02 Sep 2000 17:54:31 CDT) NNTP-Posting-Date: Sat, 02 Sep 2000 17:54:31 CDT Organization: SBC Internet Services Xref: supernews.google.com comp.lang.ada:485 Date: 2000-09-02T17:54:25-05:00 List-Id: "Richard Riehle" wrote in message news:39AF2DEC.71D8B897@ix.netcom.com... > Reminder: you still need to take a look at RMA if you have 100 concurrent tasks. I confess I don't see why. Surely the number of tasks, by itself, doesn't require a schedulability analysis. (There may very well be deadlines associated, but that hasn't been indicated as far as I know.) Absent deadlines, then this is "just" a concurrent program, in which case the issues are maximizing throughput and ensuring liveness. Liveness isn't a function of the number of tasks, so I don't see the connection. On the other hand, let's say there are deadlines. In that case, a static-priority preemptive scheduling scheme may not be the right approach (e.g., RMA). Perhaps a dynamic scheme might be best -- say Earliest Deadline First (which is optimal too). In other words, it seems to me that that the info so far -- 100 tasks -- isn't sufficient to require use of any schedulability analysis, RMA or otherwise. (Sure, the more tasks one has the more likely a general-purpose tasking system is to bog down, but that is a separate issue I would think.) Of course you know these things, so what am I missing? --- Patrick Rogers Consulting and Training in: http://www.classwide.com Deadline Schedulability Analysis progers@classwide.com Software Fault Tolerance (281)648-3165 Real-Time/OO Languages Adam ... does not deserve all the credit; much is due to Eve, the first woman, and Satan, the first consultant. Mark Twain