Re: Green Compiler ?

glen herrmannsfeldt <gah@ugcs.caltech.edu>
Sun, 23 Dec 2012 08:18:05 +0000 (UTC)

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From: glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups: comp.compilers
Date: Sun, 23 Dec 2012 08:18:05 +0000 (UTC)
Organization: Aioe.org NNTP Server
References: 12-12-010
Keywords: design, code
Posted-Date: 23 Dec 2012 18:56:01 EST

Abid <abidmuslim@gmail.com> wrote:


> It seems that the Power Wall is becoming a major issue, especially for High
> Performance Computing. Current compilers work has two dimensional model, i.e.,
> all the optimization phases are targeted either towards reducing execution
> time or code size. My question is: Do we need to change this model and make it
> three dimensional by adding power axis in the search space? If yes, then we
> have to revisit all the phases and adjust them or come up with new cost
> models for these phases.


It should be energy, not power. You can always reduce the power by
doing the calculation slower. Energy is power times time (more
generally, the integral of E(t)dt).


-- glen


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