From owner-freebsd-realtime Mon Oct 1 5:29:22 2001 Delivered-To: freebsd-realtime@freebsd.org Received: from meta.lo-res.org (meta.lo-res.org [195.58.189.92]) by hub.freebsd.org (Postfix) with ESMTP id 09AD537B409 for ; Mon, 1 Oct 2001 05:29:19 -0700 (PDT) Received: from localhost (aaron@localhost) by meta.lo-res.org (8.11.6/8.11.6) with ESMTP id f91CTLh06217; Mon, 1 Oct 2001 14:29:21 +0200 (CEST) (envelope-from aaron@meta.lo-res.org) Date: Mon, 1 Oct 2001 14:29:21 +0200 (CEST) From: aaron To: Pat Villani Cc: Bart Kus , realtime@FreeBSD.ORG Subject: Re: Ping? In-Reply-To: <3BB84A07.3BCD6C97@monmouth.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-realtime@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Mon, 1 Oct 2001, Pat Villani wrote: > Actually, I think there are quite a few folks here, but activity is nil. > > I have a broader question. What is the demand for a real-time UNIX-like > operating system? I know there are companies such as QNX and OS9 with > popular products, which I have experience with both, but my observations > have been that demand for others has not been high. In fact, I get the > feeling that there has been a decline in demand for this type of > operating system. This may seem somewhat off topic, but it questions > the value of a real-time FreeBSD project. It may help explain why > traffic here is non-existent. Well I guess it would not hurt to have some things like low-latency patches, etc. (linux has that after all :))) I am sure it would make *BSD more useful. recently I had to program a sound "pacemaker" (i.e. a heartbeat .wav is sent to the soundcard regularly). So this is not real-time, BUT: since the rate was meant to change constantly (ranging from 33 bpm to 120), I could not use /dev/rtc. Neither did the usleep() and nanosleep() function calls give me the precision which I wanted. signals were useless. Now some of you might wonder why I mention that sound not-even realtime simple project: because with sound output you can immediately feel if something is happening 100ms to late :) So, to sum it up: maybe its not a priority for freebsd but low latency things would sure make freebsd become more of a desktop multimedia OS (seems we are going in that direction anyway with all the KDE great stuff). Linux is going that way, why should not freebsd to some extent? --> some realtime capabilities would be great. greetings, aaron. --- COSHER = Completely Open Source, Headers, Engineering, and Research [ (C) Matt Blaze I believe ] To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-realtime" in the body of the message