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=1.1 required=5.0 tests=BAYES_40,INVALID_DATE autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f569d,7d68662d79c59f1c X-Google-Attributes: gidf569d,public X-Google-Thread: 109fba,46882e3fad98420e X-Google-Attributes: gid109fba,public X-Google-Thread: 102b75,7d68662d79c59f1c X-Google-Attributes: gid102b75,public X-Google-Thread: 103376,7d68662d79c59f1c X-Google-Attributes: gid103376,public X-Google-Thread: 1108a1,9292211c2d4756a8 X-Google-Attributes: gid1108a1,public X-Google-ArrivalTime: 1995-01-01 12:11:35 PST Path: nntp.gmd.de!Germany.EU.net!howland.reston.ans.net!torn!nott!cunews!revcan!aficom!fourfold!oghma.synapse.net!not-for-mail From: rjc@oghma.synapse.net (Robert J Carter) Newsgroups: comp.lang.c++,comp.object,comp.arch,comp.multimedia,comp.lang.ada Subject: Re: What's Real-Time? (was Re: Widespread C++ Competency Gap?) Message-ID: <3e5t1e$2ad@oghma.synapse.net> Date: 1 Jan 1995 04:35:42 -0500 References: <787227087snz@wslint.demon.co.uk> <3e26mc$n9u@Starbase.NeoSoft.COM> Organization: Oghma Systems NNTP-Posting-Host: oghma.synapse.net Xref: nntp.gmd.de comp.lang.c++:84749 comp.object:19083 comp.arch:27406 comp.multimedia:25729 comp.lang.ada:17724 Date: 1995-01-01T04:35:42-05:00 List-Id: In article , Przemek Klosowski wrote: >The article claims that for large systems the average resource >requirements are vastly different from worst-case requirements, and so >large 'hard' systems in the traditional sense are simply too >wasteful. An example is the telephone system. It is not 'hard real >time': the cost would be just too big. Instead, they figured out how >to manage available resources to have acceptably low failure rates. That's fine as far as it goes, but having done some work myself with reactor systems (I saw your sig), what is an acceptably low failure rate for the emergency shutdown system of a reactor? -- Robert J Carter Oghma Systems Ottawa, Ontario, Canada FAX: +1 613 231.4732 rjc@oghma.synapse.net rjc@oghma.ocunix.on.ca