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: 103376,3025dd6d917b499c X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Received: by 10.66.79.36 with SMTP id g4mr304759pax.38.1349970279812; Thu, 11 Oct 2012 08:44:39 -0700 (PDT) Received: by 10.236.114.164 with SMTP id c24mr223786yhh.17.1349970279740; Thu, 11 Oct 2012 08:44:39 -0700 (PDT) Path: jt13ni4110pbb.1!nntp.google.com!kt20no28172610pbb.1!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Thu, 11 Oct 2012 08:44:39 -0700 (PDT) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=12.35.64.226; posting-account=qZVz2QoAAAAN9WxYp-9jYb7jORc4Zqwt NNTP-Posting-Host: 12.35.64.226 References: <38af7fb8-b0a4-4a31-87aa-b7b698cc89c3@googlegroups.com> <3ca0ffd0-1764-484b-8fab-17c0d2dd9463@googlegroups.com> <1f645050-cf4c-40bf-a797-9687b69e4a54@googlegroups.com> <18ats2960nsvm$.kfufsnul13aq$.dlg@40tude.net> <5072c9ae$0$6562$9b4e6d93@newsspool4.arcor-online.net> <4keoa6epdxt7.1nnwxy7v7ar90.dlg@40tude.net> <5072dc68$0$6554$9b4e6d93@newsspool4.arcor-online.net> <1f7cmfp1l65w1.1deog8cfxbs0u$.dlg@40tude.net> <5072e37a$0$6556$9b4e6d93@newsspool4.arcor-online.net> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <1df8bb52-e659-4539-98f8-67ee60fbce1c@googlegroups.com> Subject: Re: Ada, the best language with the not-so-best tool chain From: mjsilva@scriptoriumdesigns.com Cc: mailbox@dmitry-kazakov.de Injection-Date: Thu, 11 Oct 2012 15:44:39 +0000 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Date: 2012-10-11T08:44:39-07:00 List-Id: On Tuesday, October 9, 2012 2:32:31 AM UTC-7, Dmitry A. Kazakov wrote: > Huh, are you building bombs, guys? (:-)) For most physical processes 1ms, >=20 > even 10ms cycle is more than enough. Linux can easily deliver you 1ms >=20 > cycle. I've got one AVR project with interrupts every 60us, and I need <1us latenc= y. The entire board is about 8 sq. cm. Should I port that over to Linux w= ith 1000x the memory requirements, and if so, could I even get that kind of= response? I think you have a very myopic view of what people are doing wi= th low end (but still remarkably powerful) hardware. >=20 > And who is talking about performance while choosing an ARM? >=20 >=20 >=20 > > GNAT is running on ARM under RTEMS. I don't know what the current bare >=20 > > metal status is for ARM, although people have posted in the past in >=20 > > c.l.a about work they have done on this. RTEMS takes on the order of 1MB of memory, I believe. Way too big for a gr= eat many otherwise useful 32-bit parts. Did the MIL-STD-1750A designs that= used to run Ada all require 1MB? I know the Lego port doesn't require tha= t much memory (the ARM on that platform has 256k of flash and 64k of RAM).