An Example of Porting PETSc Applications to Heterogeneous Platforms with OpenACC

Autor:	Pi-Yueh Chuang, Fernanda Foertter
Rok vydání:	2018
Předmět:	Workflow Titan (supercomputer) Source lines of code Speedup Multigrid method Computer science Parallel computing General-purpose computing on graphics processing units Supercomputer Porting
Zdroj:	Accelerator Programming Using Directives ISBN: 9783319748955 WACCPD@SC
DOI:	10.1007/978-3-319-74896-2_1
Popis:	In this paper, we document the workflow of our practice to port a PETSc application with OpenACC to a supercomputer, Titan, at Oak Ridge National Laboratory. Our experience shows a few lines of code modifications with OpenACC directives can give us a speedup of 1.34x in a PETSc-based Poisson solver (conjugate gradient method with algebraic multigrid preconditioner). This demonstrates the feasibility of enabling GPU capability in PETSc with OpenACC. We hope our work can serve as a reference to those who are interested in porting their legacy PETSc applications to modern heterogeneous platforms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bafb08c82601e57f359b4fe9c0c356ff https://doi.org/10.1007/978-3-319-74896-2_1 Zobrazit plný text záznamu