Performance per What?

Published: 02/13/2013, Last Updated: 02/13/2013

By Tomas Akenine-Möller, Björn Johnsson
Intel Corporation, Lund University

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.

Read the preprint paper: Performance per What? [PDF 240KB]

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 the Journal of Computer Graphics Techniques

Intel Rendering Research

Attachment Size
performance-per-what-paper.pdf 239.8 KB
bibtex.zip 408 B

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804