Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!us.feeder.erje.net!news.snarked.org!newsfeed.news.ucla.edu!usenet.stanford.edu!news.iecc.com!.POSTED!nerds-end From: glen herrmannsfeldt Newsgroups: comp.compilers Subject: Re: Green Compiler ? Date: Fri, 28 Dec 2012 16:14:20 +0000 (UTC) Organization: Aioe.org NNTP Server Lines: 13 Sender: johnl@iecc.com Approved: comp.compilers@iecc.com Message-ID: <12-12-031@comp.compilers> References: <12-12-010@comp.compilers> <12-12-012@comp.compilers> <12-12-022@comp.compilers> <12-12-028@comp.compilers> NNTP-Posting-Host: news.iecc.com X-Trace: leila.iecc.com 1356817859 94606 64.57.183.58 (29 Dec 2012 21:50:59 GMT) X-Complaints-To: abuse@iecc.com NNTP-Posting-Date: Sat, 29 Dec 2012 21:50:59 +0000 (UTC) Keywords: architecture, performance Posted-Date: 29 Dec 2012 16:50:58 EST X-submission-address: compilers@iecc.com X-moderator-address: compilers-request@iecc.com X-FAQ-and-archives: http://compilers.iecc.com Xref: csiph.com comp.compilers:815 Hans-Peter Diettrich wrote: (snip) > Please note that most CMOS processor power consumption results from > switching (stray) capacities, and only a small percentage for leak > currents. E.g. a register or gate consumes such power whenever a bit is > changed, and almost nothing when it has reached an stable state. Used to be true. Now, quantum tunneling through the oxide is a very significant quiescent current for CMOS. -- glen