LAPACK Working Note 37: Two Dimensional Basic Linear Algebra Communication Subprograms

  • Authors:
  • Jack J. Dongarra;Robert A. Geijn

  • Affiliations:
  • -;-

  • Venue:
  • LAPACK Working Note 37: Two Dimensional Basic Linear Algebra Communication Subprograms
  • Year:
  • 1991

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Abstract

In this paper, we describe extensions to a proposed set of linear algebra communication routines for communicating and manipulating data structures that are distributed among the memories of a distributed memory MIMD computer. In particular, recent experience shows that higher performance can be attained on such architectures when parallel dense matrix algorithms utilize a data distribution that views the computational nodes as a logical two dimensional mesh. The motivation for the BLACS continues to be to increase portability, efficiency and modularity at a high level. The audience of the BLACS are mathematical software experts and people with large scale scientific computation to perform. A systematic effort must be made to achieve a de facto standard for the BLACS.