Methods for partitioning data to improve parallel execution time for sorting on heterogeneous clusters

  • Authors:
  • Christophe Cérin;Jean-Christophe Dubacq;Jean-Louis Roch

  • Affiliations:
  • LIPN, CNRS UMR 7030, Université de Paris Nord, Villetaneuse, France;LIPN, CNRS UMR 7030, Université de Paris Nord, Villetaneuse, France;CNRS – INRIA – INPG – UJF, Projet MOAIS, ID-IMAG, Montbonnot-Saint-Martin, France

  • Venue:
  • GPC'06 Proceedings of the First international conference on Advances in Grid and Pervasive Computing
  • Year:
  • 2006

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Abstract

The aim of the paper is to introduce general techniques in order to optimize the parallel execution time of sorting on a distributed architectures with processors of various speeds. Such an application requires a partitioning step. For uniformly related processors (processors speeds are related by a constant factor), we develop a constant time technique for mastering processor load and execution time in an heterogeneous environment and also a technique to deal with unknown cost functions. For non uniformly related processors, we use a technique based on dynamic programming. Most of the time, the solutions are in ${\mathcal O}$(p) (p is the number of processors), independent of the problem size n. Consequently, there is a small overhead regarding the problem we deal with but it is inherently limited by the knowing of time complexity of the portion of code following the partitioning.