Date: Thu, 21 Sep 2006 11:54:53 -0400 From: Jerry McAllister <jerrymc@msu.edu> To: backyard <backyard1454-bsd@yahoo.com> Cc: freebsd-questions@freebsd.org, RW <list-freebsd-2004@morbius.sent.com> Subject: Re: How "real time" is FreeBSD? Message-ID: <20060921155453.GA32545@gizmo.acns.msu.edu> In-Reply-To: <20060921152110.31431.qmail@web83109.mail.mud.yahoo.com> References: <200609211511.10829.list-freebsd-2004@morbius.sent.com> <20060921152110.31431.qmail@web83109.mail.mud.yahoo.com>
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On Thu, Sep 21, 2006 at 08:21:10AM -0700, backyard wrote: > --- RW <list-freebsd-2004@morbius.sent.com> 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: > > > > ><http://news.zdnet.com/2100-9593_22-6117479.html?part=rss&tag=feed&subj=zd > > > >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. Yes, Mr Heisenberg... > > 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. They have all kinds of calculus and successive approximations in their models. The more CPU they have, the more they add to the design. ////jerry > > -brian > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
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