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: 103376,6394e5e171f847d1 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-09-06 07:05:48 PST Path: archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!news.uchicago.edu!newsswitch.lcs.mit.edu!micro-heart-of-gold.mit.edu!news-out.nuthinbutnews.com!propagator!feed2.newsfeeds.com!newsfeeds.com!newsranger.com!www.newsranger.com!not-for-mail Newsgroups: comp.lang.ada From: Ted Dennison References: <9n4euv$t9m$1@slb6.atl.mindspring.net> <9n5n33$ke5$1@nntp9.atl.mindspring.net> <9n64cd$7mo$1@slb0.atl.mindspring.net> <9n762l$7ah4@news.kvaerner.com> <9n76r2$nkl$1@slb4.atl.mindspring.net> Subject: Re: Ada OS Kernel features Message-ID: X-Abuse-Info: When contacting newsranger.com regarding abuse please X-Abuse-Info: forward the entire news article including headers or X-Abuse-Info: else we will not be able to process your request X-Complaints-To: abuse@newsranger.com NNTP-Posting-Date: Thu, 06 Sep 2001 10:05:14 EDT Organization: http://www.newsranger.com Date: Thu, 06 Sep 2001 14:05:14 GMT Xref: archiver1.google.com comp.lang.ada:12796 Date: 2001-09-06T14:05:14+00:00 List-Id: In article <9n76r2$nkl$1@slb4.atl.mindspring.net>, Brian Catlin says... > >Yes, I just looked at RT-Mach (Real-Time Mach), and it is quite impressive - as >far as microkernels go. The big problem with microkernels is that you have to >use RPC to communicate between services, which is much more expensive than a >simple CALL in a monolithic kernel. >From what I read, Mach supposedly tried to solve that by recognising when one can be transformed into the other. But that recognition code takes CPU cycles too... --- T.E.D. homepage - http://www.telepath.com/dennison/Ted/TED.html home email - mailto:dennison@telepath.com