From owner-freebsd-questions@FreeBSD.ORG Thu Sep 21 15:21:21 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 65BE516A407 for ; Thu, 21 Sep 2006 15:21:21 +0000 (UTC) (envelope-from backyard1454-bsd@yahoo.com) Received: from web83109.mail.mud.yahoo.com (web83109.mail.mud.yahoo.com [216.252.101.38]) by mx1.FreeBSD.org (Postfix) with SMTP id EF48443D55 for ; Thu, 21 Sep 2006 15:21:10 +0000 (GMT) (envelope-from backyard1454-bsd@yahoo.com) Received: (qmail 31433 invoked by uid 60001); 21 Sep 2006 15:21:10 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:Received:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=qW3pXuzU4Vx+B4CLGCProFEolHXM8dEakOtUpa1MS1XhHVyKPwHK8f4IsauNiB5+mTwV+mKUAb7koST4yDcCEbteq6yeaqrTo16J9BaIAJ7Xc/MHGhQ4s5/S3TjfjtBOIAtfvyVL+A3JYUW9GIKv3zgIXyN0SX3OvDXvkv1UQ9c= ; Message-ID: <20060921152110.31431.qmail@web83109.mail.mud.yahoo.com> Received: from [63.240.228.37] by web83109.mail.mud.yahoo.com via HTTP; Thu, 21 Sep 2006 08:21:10 PDT Date: Thu, 21 Sep 2006 08:21:10 -0700 (PDT) From: backyard To: RW , freebsd-questions@freebsd.org In-Reply-To: <200609211511.10829.list-freebsd-2004@morbius.sent.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Cc: Subject: Re: How "real time" is FreeBSD? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: backyard1454-bsd@yahoo.com List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Sep 2006 15:21:21 -0000 --- RW wrote: > On Thursday 21 September 2006 06:12, Walt Pawley > wrote: > > At 11:47 PM -0500 9/20/06, W. D. wrote: > > >Just reading this about Linux on ZDNet and was > wondering: > > > > > >nn> > > > > Cybernetic floobydust, IMHO. > > If you read what the banker says: " for each > thousandth of a second that its > trading software can act faster than competitors' > software, the company would > see $100 million a year in new revenue." > and for every extra trade they do they change the stock price faster and faster making them more money. They're creating the money by manipulating the market faster; the market doesn't create itself... How can they even quantify this so called loss when their trading is constantly changing the state of the market. > It seems to me that they are really misunderstanding > the problem. What they > need is a system that's fast most of the time, > rather than one that meets an > arbitary deadline all the time. In other words they > need a fast system, not a > realtime system. > I would imagine an extra 100 million would buy quite a dusy of a system at that... processing data at a rate of 1000 Hz doesn't seem to suggest a real-time system is required when the average clock is 1 million times faster then that. its not like they're doing FFT's on a Radar signal, to determine if its a bogey and arming the appropriate countermeasures so they can be deployed the second the blip appears on the operators screen. -brian