Date: Wed, 1 Nov 2000 22:48:56 +0000 (GMT) From: Terry Lambert <tlambert@primenet.com> To: msmith@FreeBSD.ORG (Mike Smith) Cc: drosih@rpi.edu (Garance A Drosihn), tlambert@primenet.com (Terry Lambert), drony@spray.se, freebsd-smp@FreeBSD.ORG Subject: Re: HLT Message-ID: <200011012249.PAA05692@usr08.primenet.com> In-Reply-To: <200011012119.eA1LJI433523@mass.osd.bsdi.com> from "Mike Smith" at Nov 01, 2000 01:19:18 PM
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> > >I think the real question is why, under normal operating > > >conditions, should overheating be a problem for you? > > > > While that is a good question, there's another question > > that comes to my mind. If my dual-processor system will > > have close-to-nothing to do all night while I'm out of > > the office, then why should I have both CPU's running > > at full-bore? What is the advantage of burning up the > > extra electricity and generating the extra heat, when > > there's going to be nothing to do for several hours? > > It's not that there's no advantage; until ACPI is working properly there > is no *alternative*. Someone should educate people on: 1) The amount of energy it takes, in excess of what it takes for a normal appliance, to manufacture an "energy star" appliance. NB: It actually takes more additional energy to manufacture one, than is saved over the expected lifetime of the HW, but manufactures generally pay significantly less per KWH than you do, so front loading the payment for the extra electricity is a net economic win for consumers (even if it's a net economic loss for the environment). 2) Compared to what idle-looping CPUs consume, I guess not everyone is aware of what fans, electromechanical devices that they are, actually consume, either? It's only recently that we have multispeed fans, and fans that shut themselves down, based on input from the output of thermisters. NB: Compare the expected battery life on laptops that have comparable speed processors, where one implements with a heatsink, and the other implements with a fan. I know it's politically correct and all, but like plastic grocery bags that get recycled into bus benches vs. paper sacks which don't biodegrade (ever) in landfills for lack of exposure to sun, water, and air to feed the necessary aerobic organisms, false environmentalism is pretty rampant these days (assuming that it's false environmentalism, not false economy, which resulted in the statement about HLTed CPU vs. non-HLTed CPU power consumption). Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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