ASC Tri-lab Co-design Level 2 Milestone Report 2015

Technical Report · Wed Sep 23 00:00:00 EDT 2015

DOI:https://doi.org/10.2172/1240955· OSTI ID:1240955

Hornung, Rich ^[1]; Jones, Holger ^[1]; Keasler, Jeff ^[1]; Neely, Rob ^[1]; Pearce, Olga ^[1]; Hammond, Si ^[2]; Trott, Christian ^[2]; Lin, Paul ^[2]; Vaughan, Courtenay ^[2]; Cook, Jeanine ^[2]; Hoekstra, Rob ^[2]; Bergen, Ben ^[3]; Payne, Josh ^[3]; Womeldorff, Geoff ^[3]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In 2015, the three Department of Energy (DOE) National Laboratories that make up the Advanced Sci- enti c Computing (ASC) Program (Sandia, Lawrence Livermore, and Los Alamos) collaboratively explored performance portability programming environments in the context of several ASC co-design proxy applica- tions as part of a tri-lab L2 milestone executed by the co-design teams at each laboratory. The programming environments that were studied included Kokkos (developed at Sandia), RAJA (LLNL), and Legion (Stan- ford University). The proxy apps studied included: miniAero, LULESH, CoMD, Kripke, and SNAP. These programming models and proxy-apps are described herein. Each lab focused on a particular combination of abstractions and proxy apps, with the goal of assessing performance portability using those. Performance portability was determined by: a) the ability to run a single application source code on multiple advanced architectures, b) comparing runtime performance between \native" and \portable" implementations, and c) the degree to which these abstractions can improve programmer productivity by allowing non-portable implementation details to be hidden from the application developer. This report captures the work that was completed for this milestone, and outlines future co-design work to be performed by application developers, programming environment developers, compiler writers, and hardware vendors.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-07NA27344
• OSTI ID: 1240955
• Report Number(s): LLNL-TR-677453
• Country of Publication: United States
• Language: English

Related Subjects

97 MATHEMATICS AND COMPUTING