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=-1.2 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, FROM_STARTS_WITH_NUMS autolearn=no autolearn_force=no version=3.4.4 X-Google-Thread: 103376,f15b862e11b575a4 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news4.google.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Vinzent Hoefler" <0439279208b62c95f1880bf0f8776eeb@t-domaingrabbing.de> Newsgroups: comp.lang.ada Subject: Re: Air traffic control system in Java Date: Thu, 03 Mar 2011 22:44:13 +0100 Message-ID: References: <4d6ffe16$0$17930$a8266bb1@postbox2.readnews.com> <4d7007ba$0$17957$a8266bb1@postbox2.readnews.com> <4d7009ba$0$17936$a8266bb1@postbox2.readnews.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit X-Trace: individual.net zGEvfLkUWHumiUv40XXSDgPXb2CaIJrP3PiuJnJmErN9heh4xb Cancel-Lock: sha1:GGoyst4Bk1+liQRfMejiPUmwU4A= User-Agent: Opera Mail/11.01 (Win32) Xref: g2news2.google.com comp.lang.ada:18756 Date: 2011-03-03T22:44:13+01:00 List-Id: Hyman Rosen wrote: > On 3/3/2011 4:34 PM, Vinzent Hoefler wrote: >> And that's the GC that is used in the ATC system? I would have expected to see >> at least a Real Time Java there with all the RawMemory and NoHeapRealtimeThread >> fuzz. ;) > > I have no idea. But you expressed skepticism about real-time > and Java, and I assumed that was related to the collector. I haven't seen any usable Real Time Java yet. That's where my scepticism comes from. Did you know that not even the scheduling is defined by the language, although Java threads sure can have a priority assigned? Yet, there's no guarantee that the highest priority task will even run. So, yes I still consider Real Time Java an oxymoron. Vinzent. -- A C program is like a fast dance on a newly waxed dance floor by people carrying razors. -- Waldi Ravens