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-Thread: 103376,38d01316d66d8f95 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Received: by 10.68.189.197 with SMTP id gk5mr5149510pbc.1.1331208272242; Thu, 08 Mar 2012 04:04:32 -0800 (PST) MIME-Version: 1.0 Path: h9ni2289pbe.0!nntp.google.com!news2.google.com!news3.google.com!proxad.net!feeder1-2.proxad.net!weretis.net!feeder4.news.weretis.net!eternal-september.org!feeder.eternal-september.org!mx04.eternal-september.org!.POSTED!not-for-mail From: Simon Clubley Newsgroups: comp.lang.ada Subject: Re: Ada and linux real time Date: Thu, 8 Mar 2012 12:04:31 +0000 (UTC) Organization: A noiseless patient Spider Message-ID: References: <8kb66jddm0qb.1piup0wfaho1$.dlg@40tude.net> <3a01f684-b544-4051-985d-58aab98e832c@v2g2000vbx.googlegroups.com> <13z45jd9irz9x.1j2hj7ayxwkyj.dlg@40tude.net> Injection-Date: Thu, 8 Mar 2012 12:04:31 +0000 (UTC) Injection-Info: mx04.eternal-september.org; posting-host="4pjzwDT2MPp9AkNxUo/C4Q"; logging-data="10070"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX199iGJ63jRtED+OxHRM2lL1Dd0ej+fGWCE=" User-Agent: slrn/0.9.8.1 (VMS/Multinet) Cancel-Lock: sha1:H0ccZmddNT9YsOyoahvD5xNIw4M= Date: 2012-03-08T12:04:31+00:00 List-Id: On 2012-03-07, Eilie wrote: > On 2012-03-07, Dmitry A. Kazakov wrote: >> On Wed, 7 Mar 2012 04:10:14 -0800 (PST), slos wrote: >> >> I cannot tell for Linux, because I didn't use it for real-time purposes >> yet. Ideally it should derive the system time from the TSC. However >> scheduling would likely limited when controlled by timer interrupts. The >> minimal waiting time is then determined by the timer's period. You should >> look for this kernel setting if you want go below 10ms, or what the actual >> limit is. >> > > And what OS do you use for real-time purposes? Look at RTEMS. It has Ada support built in. I recommend you read through the online documentation first to decide if it's suitable for you. Start at http://www.rtems.com/ Simon. -- Simon Clubley, clubley@remove_me.eisner.decus.org-Earth.UFP Microsoft: Bringing you 1980s technology to a 21st century world