From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 19708 invoked by alias); 29 May 2006 16:26:28 -0000 Received: (qmail 19684 invoked by uid 22791); 29 May 2006 16:26:27 -0000 X-Spam-Check-By: sourceware.org Received: from nz-out-0102.google.com (HELO nz-out-0102.google.com) (64.233.162.196) by sourceware.org (qpsmtpd/0.31) with ESMTP; Mon, 29 May 2006 16:26:22 +0000 Received: by nz-out-0102.google.com with SMTP id n29so583223nzf for ; Mon, 29 May 2006 09:26:20 -0700 (PDT) Received: by 10.65.97.16 with SMTP id z16mr1130576qbl; Mon, 29 May 2006 09:26:20 -0700 (PDT) Received: by 10.64.199.17 with HTTP; Mon, 29 May 2006 09:26:20 -0700 (PDT) Message-ID: <69dd805e0605290926m745c0cf2yc19b9fd400e7fa9b@mail.gmail.com> Date: Mon, 29 May 2006 16:26:00 -0000 From: "Fabian Scheler" To: "R Vamshi Krishna" Cc: ecos-discuss@ecos.sourceware.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: X-IsSubscribed: yes Mailing-List: contact ecos-discuss-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: ecos-discuss-owner@ecos.sourceware.org Subject: Re: [ECOS] Hard-Realtime behaviour X-SW-Source: 2006-05/txt/msg00229.txt.bz2 > IFAIK a "Hard" real-time OS is an Operting System in which the worst-case > execution time of the system calls is either known beforehand or > computable based on the how the application is configured (aka no. of > threads, no. of interrupting sources, their periodicity) etc.. but I have > not been successful. you have not been successful regarding what? - to show that all parts of the kernel API have deterministic behaviour or are suitable for a use in hard real-time systems? Which ones? Maybe you should restrict the usage of the kernel API to achive hard real-time compliance (e.g. abstaining the processor voluntarily makes the analysis of any real-time system nasty!!) ? Ciao, Fabian -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss