SCHEDULE: NOV 15-20, 2015

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Directive-Based Pipelining Extension for OpenMP

SESSION: Regular & ACM Student Research Competition Poster Reception

EVENT TYPE: Posters, Receptions, ACM Student Research Competition

EVENT TAG(S): HPC Beginner Friendly, Regular Poster

TIME: 5:15PM - 7:00PM

SESSION CHAIR(S): Michela Becchi, Manish Parashar, Dorian C. Arnold

AUTHOR(S):Xuewen Cui, Thomas R. W. Scogland, Bronis R. de Supinski, Wu-chun Feng

ROOM:Level 4 - Lobby

ABSTRACT:

Heterogeneity continues to increase in computing applications, with the rise of accelerators such as GPUs, FPGAs, APUs, and other co-processors. They have also become common in state-of-the-art supercomputers on the TOP500 list. Programming models, such as CUDA, OpenMP, OpenACC and OpenCL are designed to offload compute intensive workloads to co-processors efficiently. However, the naive offload model, synchronously copying and executing, in sequence is inefficient. However, pipelining these activities reduces programmability.

We propose an easy-to-use directive-based pipelining extension for OpenMP. Our extension offers a simple interface to overlap data transfer and kernel computation with an auto-tuning scheduler. We achieve performance improvements between 40% and 60% for a Lattice QCD application.

Chair/Author Details:

Michela Becchi, Manish Parashar, Dorian C. Arnold (Chair) - University of Missouri|Rutgers University|University of New Mexico|

Xuewen Cui - Virginia Polytechnic Institute and State University

Thomas R. W. Scogland - Lawrence Livermore National Laboratory

Bronis R. de Supinski - Lawrence Livermore National Laboratory

Wu-chun Feng - Virginia Polytechnic Institute and State University

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