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 22:34:04 +0100 Message-ID: References: <4d6ffe16$0$17930$a8266bb1@postbox2.readnews.com> <4d7007ba$0$17957$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 cwMuqBfXWsMGw3f2tzzfRAVgU//iUuNVkY46UCHEiNpZVfI8nO Cancel-Lock: sha1:V4GJY7woHPRjdsKsHGvXSsfpMqw= User-Agent: Opera Mail/11.01 (Win32) Xref: g2news2.google.com comp.lang.ada:18753 Date: 2011-03-03T22:34:04+01:00 List-Id: Hyman Rosen wrote: > On 3/3/2011 4:13 PM, Vinzent Hoefler wrote: >> Hyman Rosen wrote: >> >>> >>> >>> And the arguments about it are flying through the air >>> as fast as the planes :-) >> >> WTF!? Isn't air traffic control supposed to be a real-time task? And they do >> it in _Java_? > > Well, here's a paper by IBM that's ten years old, > , > Java without the Coffee Breaks: > A Nonintrusive Multiprocessor Garbage Collector > > In this paper we present a new multiprocessor garbage collector > that achieves maximum measured pause times of 2.6 milliseconds > over a set of eleven benchmark programs that perform significant > amounts of memory allocation. 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. ;) Vinzent. -- A C program is like a fast dance on a newly waxed dance floor by people carrying razors. -- Waldi Ravens