Performance per What?

Authors: Tomas Akenine-Möller, Intel Corporation and Lund University
Björn Johnsson, Intel Corporation and Lund University

Published: 18 Oct. 2012 in JCGT 1(1):37--41,
http://jcgt.org/published/0001/01/03/
Corresponding Editor: Peter Shirley, NVIDIA
Editor-in-Chief: Morgan McGuire, Williams College & NVIDIA

Abstract

In this short note, we argue that performance per watt, which is often cited in the graphics hardware industry, is not a particularly useful unit for power efficiency in scientific and engineering discussions. We argue that joules per task and watts are more reasonable units. We show a concrete example where nanojoules per pixel is much more intuitive, easier to compute aggregate statistics from, and easier to reason about.

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Citation: Akenine-Möller and Johnsson, Performance per What?, Journal of Computer Graphics Techniques (JCGT), vol. 1, no. 1, 37-41, 18 Oct. 2012. Available online http://jcgt.org/published/0001/01/03/

Copyright: © 2012 Akenine-Möller and Johnsson.

Received: 5 Sept. 2012; Recommended: 18 Sept. 2012; Published: 18 Oct. 2012