HPC-MW Technical Report
HPC-MW 2004-001 (February 2004)

TITLE
Preconditioned Iterative Linear Solvers for Unstructured Grids on the Earth Simulator

AUTHORS
Kengo Nakajima (RIST)

CONTACT PERSON
Kengo Nakajima (RIST)  (nakajima@tokyo.rist.or.jp)

KEY WORDS & PHRASES
Earth Simulator, SMP Cluster, Hybrid, Flat MPI, Unstructured Grid, Preconditioned Iterative Solvers

ABSTRACT
Efficient parallel preconditioned iterative linear solvers for unstructured grid have been developed for symmetric multiprocessor (SMP) cluster architectures with vector processors such as the Earth Simulator. Three types of preconditioning methods (ICCG, multigrid and selective-blocking for contact problems) have been developed and performance has been demonstrated on the Earth Simulator using flat-MPI and hybrid parallel programming models. Simple 3D linear elastic problems with more than 2.2x10^9 DOF have been solved using 3x3 block ICCG(0) method and PDJDS/CM-RCM reordering on 176 nodes of the Earth Simulator, achieving performance of 3.80 TFLOPS. Multicolor and RCM ordering provide excellent parallel and vector performance of the three preconditioned methods on the Earth Simulator.

REPORT DATE
February 7th, 2004

ANY OTHER IDENTIFYING INFORMATION OF THIS REPORT
submitted to HPC Asia 2004,
7th International Conference on
High Performance Computing and Grid in Asia Pacific Region
Omiya Sonic City, Tokyo Area, Japan
July 20-22, 2004.

FULL LENGTH REPORT
PDF Version : HPCMW04_001.pdf (388KB)   :3+8pages

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