Date: Wed, 01 Nov 2000 18:55:17 -0800 From: Seth Leigh <seth@pengar.com> To: freebsd-smp@FreeBSD.ORG Subject: Re: HLT Message-ID: <3.0.6.32.20001101185517.00c6def8@hobbiton.shire.net> In-Reply-To: <200011012249.PAA05692@usr08.primenet.com> References: <200011012119.eA1LJI433523@mass.osd.bsdi.com>
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Someone write this down, so we don't forget. The environment *must* be one of Terry's hot buttons. Beware, lest you push it! Seth At 10:48 PM 11/1/2000 +0000, Terry Lambert wrote: >> > >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 > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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