Analysis and comparison of two general sparse solvers for distributed memory computers

  • Authors:
  • Patrick R. Amestoy;Iain S. Duff;Jean-Yves L'excellent;Xiaoye S. Li

  • Affiliations:
  • ENSEEIHT-IRIT;CERFACS and Rutherford Appleton Laboratoy;ENSEEIHT-IRIT and LIP-ENS Lyon;NERSC-Lawrence Berkeley National Laboratory

  • Venue:
  • ACM Transactions on Mathematical Software (TOMS)
  • Year:
  • 2001

Quantified Score

Hi-index 0.00

Visualization

Abstract

This paper provides a comprehensive study and comparison of two state-of-the-art direct solvers for large sparse sets of linear equations on large-scale distributed-memory computers. One is a multifrontal solver called MUMPS, the other is a supernodal solver called superLU. We describe the main algorithmic features of the two solvers and compare their performance characteristics with respect to uniprocessor speed, interprocessor communication, and memory requirements. For both solvers, preorderings for numerical stability and sparsity play an important role in achieving high parallel efficiency. We analyse the results with various ordering algorithms. Our performance analysis is based on data obtained from runs on a 512-processor Cray T3E using a set of matrices from real applications. We also use regular 3D grid problems to study the scalability of the two solvers.