Re: Green Compiler ?

glen herrmannsfeldt <gah@ugcs.caltech.edu>
Fri, 28 Dec 2012 16:14:20 +0000 (UTC)

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From: glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups: comp.compilers
Date: Fri, 28 Dec 2012 16:14:20 +0000 (UTC)
Organization: Aioe.org NNTP Server
References: 12-12-010 12-12-012 12-12-022 12-12-028
Keywords: architecture, performance
Posted-Date: 29 Dec 2012 16:50:58 EST

Hans-Peter Diettrich <DrDiettrich1@aol.com> 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


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