Performance per What?

Tomas Akenine-Möller
Intel Corporation /
Lund University

Björn Johnsson
Intel Corporation /
Lund University

Journal of Computer Graphics Techniques, vol. 1, no. 1, pp. 37-41, 2012.

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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