NekBone with Optimizaed OpenACC directives
2015 (English)Conference paper (Refereed)
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.
Place, publisher, year, edition, pages
2015. , 8 p.63-70 p.
NekBone/Nek5000, OpenACC, Spectral element method, GPUDi rect
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-180731ISBN: 978-84-608-2581-4OAI: oai:DiVA.org:kth-180731DiVA: diva2:896571
the Second International Workshop on Sustainable Ultrascale Computing Systems (NESUS 2015)
QC 201603082016-01-212016-01-212016-03-08Bibliographically approved