SC20 Proceedings

The International Conference for High Performance Computing, Networking, Storage, and Analysis

Tracking Performance Portability on the Yellow Brick Road to Exascale

Workshop:P3HPC: 3rd International Workshop on Performance Portability and Productivity

Authors: Tom Deakin, Andrei Poenaru, Tom Lin, and Simon McIntosh-Smith (University of Bristol)

Abstract: With exascale machines on our immediate horizon, there is a pressing need for applications to be made ready to best exploit these systems. However, there will be multiple paths to exascale, with each system relying on processor and accelerator technologies from different vendors. As such, applications will be required to be portable between these different architectures, but it is also critical that they are efficient too. These double requirements for portability and efficiency begets the need for performance portability. In this study we survey the performance portability of different programming models, including the open standards OpenMP and SYCL, across the diverse landscape of exascale and pre-exascale processors from Intel, AMD, NVIDIA, Fujitsu, Marvell, and Amazon, together encompassing GPUs and CPUs based on both x86 and Arm architectures. We also take a historical view and analyze how performance portability has changed over the last year.

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