Large Scale Parallel Structured AMR Calculations Using the SAMRAI Framework

Author

Wissink, Andrew M. ; Hornung, Richard D. ; Kohn, Scott R. ; Smith, Steve S. ; Elliott, Noah

Author_Institution

Lawrence Livermore National Laboratory

fYear

2001

fDate

10-16 Nov. 2001

Firstpage

22

Lastpage

22

Abstract

This paper discusses the design and performance of the parallel data communication infrastructure in SAMRAI, a software framework for structured adaptive mesh refinement (SAMR) multi-physics applications. We describe requirements of such applications and how SAMRAI abstractions manage complex data communication operations found in them. Parallel performance is characterized for two adaptive problems solving hyperbolic conservation laws on up to 512 processors of the IBM ASCI Blue Pacific system. Results reveal good scaling for numerical and data communication operations but poorer scaling in adaptive meshing and communication schedule construction phases of the calculations. We analyze the costs of these different operations, addressing key concerns for scaling SAMR computations to large numbers of processors, and discuss potential changes to improve our current implementation.

Keywords

Adaptive mesh refinement; Application software; Costs; Data communication; Government; Grid computing; Laboratories; Large-scale systems; Libraries; Scientific computing;

fLanguage

English

Publisher

ieee

Conference_Titel

Supercomputing, ACM/IEEE 2001 Conference

Print_ISBN

1-58113-293-X

Type

conf

DOI

10.1109/SC.2001.10029

Filename

1592798