From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 4613 invoked by alias); 24 Jun 2005 11:41:19 -0000 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 Received: (qmail 4225 invoked by uid 22791); 24 Jun 2005 11:41:01 -0000 Received: from smtp1.iitb.ac.in (HELO smtp1.iitb.ac.in) (203.199.51.149) by sourceware.org (qpsmtpd/0.30-dev) with SMTP; Fri, 24 Jun 2005 11:41:01 +0000 Received: (qmail 11045 invoked from network); 24 Jun 2005 17:10:57 +0530 Received: from unknown (HELO ldns1.iitb.ac.in) (10.200.12.1) by smtp1.iitb.ac.in with SMTP; 24 Jun 2005 17:10:57 +0530 Received: (qmail 21421 invoked by uid 509); 24 Jun 2005 11:37:08 -0000 Received: from 10.105.1.1 by ldns1 (envelope-from , uid 501) with qmail-scanner-1.25 (clamdscan: 0.85.1/955. spamassassin: 3.0.2. Clear:RC:1(10.105.1.1):. Processed in 0.017815 secs); 24 Jun 2005 11:37:08 -0000 Received: from unknown (HELO cse.iitb.ac.in) (10.105.1.1) by ldns1.iitb.ac.in with SMTP; 24 Jun 2005 11:37:08 -0000 Received: (qmail 21246 invoked by uid 509); 24 Jun 2005 11:40:12 -0000 Received: from vamshi@cse.iitb.ac.in by jeeves.cse.iitb.ac.in by uid 507 with qmail-scanner-1.22-st-qms (clamdscan: 0.73. spamassassin: 2.63. Clear:RC:1(10.105.1.11):. Processed in 0.015025 secs); 24 Jun 2005 11:40:12 -0000 X-Antivirus-cse.iitb.ac.in-Mail-From: vamshi@cse.iitb.ac.in via jeeves.cse.iitb.ac.in X-Antivirus-cse.iitb.ac.in: 1.22-st-qms (Clear:RC:1(10.105.1.11):. Processed in 0.015025 secs Process 21241) Received: from mars.cse.iitb.ac.in (10.105.1.11) by cse.iitb.ac.in with SMTP; 24 Jun 2005 11:40:12 -0000 Date: Fri, 24 Jun 2005 11:41:00 -0000 From: R Vamshi Krishna To: ecos-discuss@sources.redhat.com In-Reply-To: <20050624112732.GA7187@lunn.ch> Message-ID: References: <20050624112732.GA7187@lunn.ch> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Subject: Re: [ECOS]: Is eCos Hard Real Time OS ?? X-SW-Source: 2005-06/txt/msg00234.txt.bz2 On Fri, 24 Jun 2005, Andrew Lunn wrote: > On Fri, Jun 24, 2005 at 04:37:42PM +0530, R Vamshi Krishna wrote: >> >> Is eCos a Hard Real Time OS ? > > No, its a soft real time system. It never give guarantees that task X > will finish by time Z, which is the normal definition of hard real > time. eCos will do its best to ensure that the high priority task gets > to run before the low priority task, which for most embedded systems > is enough. > > Andrew > > Then what parts do I re-write to make it hard-real time ? Because I want to use eCos but also I need a hard reak-time OS. -- Vamshi -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss