Abstract
Achieving high-performance of large scientific codes is a difficult task. This has led to the development of numerous mini-applications that are more tractable to analyse, while retaining performance characteristics of their full-sized counterparts. These 'mini-apps' also enable faster hardware evaluation, and for sensitive codes allow evaluation of systems outside of access approval processes. In this paper we develop a mini-application of a geometric multigrid, unstructured grid Computational Fluid Dynamics (CFD) code, designed to exhibit similar performance characteristics without sharing code. We detail our experiences developing this application, using guidelines detailed in existing research, and contribute further additions to these to aid future mini-application developers. Our application is validated against the inviscid flux routine of HYDRA, a CFD code developed by Rolls-Royce, which confirms that the parent kernel and mini-application share fundamental causes of parallel inefficiency. We then use the mini-application to assess the impact of Intel's Knights Landing (KNL) on performance. We find that the mini-app and parent kernel continue to share scaling characteristics, however a comparison with Broadwell performance exposed significant differences between the kernels that were undetected by the validation.
Original language | English |
---|---|
Title of host publication | Proceedings - 26th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing, PDP 2018 |
Editors | Igor Kotenko, Ivan Merelli, Pietro Lio |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Pages | 68-76 |
Number of pages | 9 |
ISBN (Electronic) | 9781538649756 |
DOIs | |
Publication status | Published - 6 Jun 2018 |
Event | 26th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing, PDP 2018 - Cambridge, United Kingdom Duration: 21 Mar 2018 → 23 Mar 2018 |
Publication series
Name | Proceedings - 26th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing, PDP 2018 |
---|
Conference
Conference | 26th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing, PDP 2018 |
---|---|
Country/Territory | United Kingdom |
City | Cambridge |
Period | 21/03/18 → 23/03/18 |
Bibliographical note
Publisher Copyright:© 2018 IEEE.
Keywords
- computational fluid dynamics
- high performance computing
- performance analysis
- scientific computing
ASJC Scopus subject areas
- Computer Networks and Communications
- Hardware and Architecture