Publication:
NekBone with Optimized OpenACC directives

Loading...
Thumbnail Image
Identifiers
ISBN: 978-84-608-2581-4
Publication date
2015-10
Defense date
Advisors
Tutors
Journal Title
Journal ISSN
Volume Title
Publisher
Impact
Google Scholar
Export
Research Projects
Organizational Units
Journal Issue
Abstract
Accelerators and, in particular, Graphics Processing Units (GPUs) have emerged as promising computing technologies which may be suitable for the future Exascale systems. Here, we present performance results of NekBone, a benchmark of the Nek5000 code, implemented with optimized OpenACC directives and GPUDirect communications. Nek5000 is a computational fluid dynamics code based on the spectral element method used for the simulation of incompressible flow. Results of an optimized NekBone version lead to 78 Gflops performance on a single node. In addition, a performance result of 609 Tflops has been reached on 16, 384 GPUs of the Titan supercomputer at Oak Ridge National Laboratory.
Description
Proceedings of: Second International Workshop on Sustainable Ultrascale Computing Systems (NESUS 2015). Krakow (Poland), September 10-11, 2015.
Keywords
NekBone, Nek5000, OpenACC, Spectral element method, GPUDirect
Bibliographic citation
Carretero Pérez, Jesús; et.al. (eds.). (2015) Proceedings of the Second International Workshop on Sustainable Ultrascale Computing Systems (NESUS 2015): Krakow, Poland. Universidad Carlos III de Madrid, pp. 63-70.