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NVIDIA GTC San Jose 2017

S7193 - Achieving Portable Performance for GTC-P with OpenACC on GPU, Multi-Core CPU, and Sunway Many-Core Processor

Session Speakers
Session Description

Gyrokinetic Toroidal Code developed in Princeton (GTC-P) delivers highly-scalable plasma turbulence simulations at extreme scales on world-leading supercomputers such as Tianhe-2 and Titan. The aim of this work to achieve portable performance in a single source code for GTC-P. We developed the first OpenACC implementation for GPU, CPU, and Sunway processor. The results showed the OpenACC version achieved nearly 90% performance of NVIDIA?CUDA?version on GPU and OpenMP version on CPU; the Sunway OpenACC version achieved 2.5X speedup in the entire code. Our work demonstrates OpenACC can deliver portable performance to complex real-science codes like GTC-P. In additional, we request adding thread-id support in OpenACC standard to avoid expensive atomic operations for reductions.


Additional Session Information
Intermediate
Talk
HPC and Supercomputing
Higher Education / Research
25 minutes
Session Schedule