Memory efficient parallel matrix multiplication operation for irregular problems

  • Authors:

  • Manojkumar Krishnan;Jarek Nieplocha

  • Affiliations:

  • Pacific Northwest National Laboratory, Richland, WA;Pacific Northwest National Laboratory, Richland, WA

  • Venue:
  • Proceedings of the 3rd conference on Computing frontiers
  • Year:
  • 2006

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Abstract

Regular distributions for storing dense matrices on parallel systems are not always used in practice. In many scientific applicati RUMMA) [1] to handle irregularly distributed matrices. Our approach relies on a distribution independent algorithm that provides dynamic load balancing by exploiting data locality and achieves performance as good as the traditional approach which relies on temporary arrays with regular distribution, data redistribution, and matrix multiplication for regular matrices to handle the irregular case. The proposed algorithm is memory-efficient because temporary matrices are not needed. This feature is critical for systems like the IBM Blue Gene/L that offer very limited amount of memory per node. The experimental results demonstrate very good performance across the range of matrix distributions and problem sizes motivated by real applications.