Scheduling trees with large communication delays on two identical processors

  • Authors:
  • F. Afrati;E. Bampis;L. Finta;I. Milis

  • Affiliations:
  • National Technical University of Athens, Athens, Greece 15773;LaMI, Université d'Evry, Evry Cedex, France;LIPN, Université Paris, Villetaneuse Cedex, France 93430;Athens University of Economics and Business, Athens, Greece 10434

  • Venue:
  • Journal of Scheduling
  • Year:
  • 2005

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Abstract

We consider the problem of scheduling trees on two identical processors in order to minimize the makespan. We assume that tasks have unit execution times, and arcs are associated with large identical integer communication delays. We prove that the problem is NP-hard in the strong sense even when restricted to the class of binary trees, and we provide a polynomial-time algorithm for complete binary trees.