Improved Performance for Nodal Spectral Element Operators

Autor:	Jörg Stiller, Wolfgang E. Nagel, Uwe Fladrich
Rok vydání:	2008
Předmět:	Floating point Operator (computer programming) Speedup Factorization Hardware and Architecture Computer science Spectral element method Tetrahedron Context (language use) Algorithm Software Symmetry (physics) Theoretical Computer Science
Zdroj:	The International Journal of High Performance Computing Applications. 22:450-459
ISSN:	1741-2846 1094-3420
DOI:	10.1177/1094342007093680
Popis:	The computational performance of the nodal spectral element method (SEM) for tetrahedral grids is evaluated in the context of a high-performance computing platform. The elemental SEM operator is accelerated by the symmetry-based factorization technique of Hesthaven and Teng (SIAM J. Sci. Comp. 21, p. 2352, 2000), which results in a reduced number of floating point operations and memory accesses. However, performance evaluation reveals that a naive implementation of the algorithm causes a severe degradation of computational efficiency. Two algorithmic modifications are proposed which regain (and partly exceed) the efficiency of the original, non-factorized operator and thus recover the asymptotic 9/5 speedup due to factorization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::44d5dfb7dd47e57f37d929adf2e2d697 https://doi.org/10.1177/1094342007093680 Zobrazit plný text záznamu