Twelve ways to fool the masses when giving parallel-in-time results

Publikationstyp
Conference Paper
Date Issued
2021-08-25
Sprache
English
Author(s)
Götschel, Sebastian  orcid-logo
Minion, Michael  
Ruprecht, Daniel  orcid-logo
Speck, Robert  
Institut
Mathematik E-10  
TORE-URI
http://hdl.handle.net/11420/10591
First published in
Springer proceedings in mathematics & statistics  
Number in series
356
Start Page
81
End Page
94
Citation
Springer Proceedings in Mathematics and Statistics 356: 81-94 (2021)
Contribution to Conference
9th Parallel-in-Time Workshop, PinT 2020  
Publisher DOI
10.1007/978-3-030-75933-9_4
Scopus ID
2-s2.0-85115189662
Publisher
Springer Nature
Getting good speedup—let alone high parallel efficiency—for parallel-in-time (PinT) integration examples can be frustratingly difficult. The high complexity and large number of parameters in PinT methods can easily (and unintentionally) lead to numerical experiments that overestimate the algorithm’s performance. In the tradition of Bailey’s article “Twelve ways to fool the masses when giving performance results on parallel computers”, we discuss and demonstrate pitfalls to avoid when evaluating the performance of PinT methods. Despite being written in a light-hearted tone, this paper is intended to raise awareness that there are many ways to unintentionally fool yourself and others and that by avoiding these fallacies more meaningful PinT performance results can be obtained.
DDC Class
510: Mathematik
More Funding Information
The work of Minion was supported by the U.S. Department of Energy, Office of Science, Office of Advanced Scientific Computing Research, Applied Mathematics program under contract number DE-AC02005CH11231. Part of the simulations was performed using resources of the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.