Coupled Newton-Krylov solver for improved CHAD cache utilization and performance.

Canfield, T. R. ; Chien, T. H. ; Domanus, H. M. ; Tentner, A. M. ; Tzanos, C. P. ; Valentin, R. A. ; Weber, D. P.

Technical Information Center Oak Ridge Tennessee

关键词: Fluid flow;    Hydrodynamics;    Computerized simulation;    C codes;    Navier-stokes equations;   

RP-ID  :  DE2001775257

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

CHAD (Computational Hydrodynamics for Advanced Design) is a computer program that has been developed to analyze flows in automotive and defense applications. Extensive performance analysis of the CHAD computer program indicated a need to address cache memory use to increase computational performance. Several strategies have been adopted to achieve this goal: simultaneous solution of the coupled Navier-Stokes equations, data clustering, and data ordering. A coupled Newton-Krylov solver has been incorporated into a version of the CHAD program, resulting in consistent improvement in run times that varies from 50% to 200%. Further work will be required to tune the solver for optimal performance. In addition, experiments with data cluster and reordering indicate a potential for performance improvement.