The International Conference for High Performance Computing, Networking, Storage, and Analysis
The International Conference for High Performance Computing, Networking, Storage, and Analysis
Workshop:P3HPC: 2021 International Workshop on Performance, Portability, and Productivity in HPC
Authors: John Pennycook and Jason Sewall (Intel Corporation)
Abstract: Our previously proposed metric for performance portability has been successful in spurring the development of tools and encouraging fair and meaningful evaluations of applications and programming frameworks. However, several practitioners have critiqued its formulation and questioned its interpretation.
In this presentation, we revisit and clarify our criteria for a useful performance portability metric, and present a derivation of our metric from first principles to inform its interpretation in a variety of scenarios. We explore the implications of this derivation for practitioners, providing clear guidance for when it is appropriate to use our metric and when alternative metrics are more suitable.