SCHEDULE: NOV 15-20, 2015

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A Performance Evaluation of Kokkos and RAJA using the TeaLeaf Mini-App

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):Matt Martineau, Simon McIntosh-Smith, Wayne Gaudin, Mike Boulton, David Beckingsale

ROOM:Level 4 - Lobby

ABSTRACT:

In this research project we have taken the TeaLeaf ’mini-app’ and developed several ports using a mixture of new and mature parallel programming models. Performance data collected on modern HPC devices demonstrates the capacity for each to achieve portable performance.

We have discovered that RAJA is a promising model with an intuitive development approach, that exhibits good performance on CPUs, but currently lack functional portability. Kokkos requires more up-front development, but presents a highly competitive option for performance portability on CPUs and NVIDIA GPUs. The results show that Kokkos can exhibit performance to within 5% of OpenMP and hand-optimised CUDA for some solvers, and collaboration with Sandia demonstrated that good performance could be achieved on Intel Xeon Phi devices at the expense of GPU performance.

Our poster presents highlights of the results collected during this research to enable open discussion about the benefits of each model for application developers.

Chair/Author Details:

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

Matt Martineau - University of Bristol

Simon McIntosh-Smith - University of Bristol

Wayne Gaudin - Atomic Weapons Establishment

Mike Boulton - University of Bristol

David Beckingsale - Lawrence Livermore National Laboratory

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