Parallel optimization algorithm for minimum execution-time multiprocessor scheduling problem

Hironori Kasahara, Atsusi Itoh, Hisamitsu Tanaka, Keisuke Itoh

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    1 Citation (Scopus)


    This paper proposes a parallel optimization algorithm PDF/IHS for the minimum execution-time multiprocessor scheduling problem which is a strong NP-hard optimization problem. PDF/IHS is a parallelization and efficient implementation of the only practical optimization algorithm DF/IHS among those which have been proposed for this scheduling problem. In PDF/IHS, processors perform depth-first search in parallel on a heuristically generated search tree in such a way that it is searched hierarchically from the left- and right-hand sides. The effectiveness of PDF/IHS has been verified by simulation and practical parallel processing on Alliant FX4. As a result, it has been recognized that most of the problems which required a long time by DF/IHS can be solved approximately in time 1/m by PDF/IHS using m processors. Moreover, even for a problem which required a very long time or could not be solved in a practical time by DF/IHS, it has been verified that PDF/IHS can give solutions in time less than 1/m.

    Original languageEnglish
    Pages (from-to)54-65
    Number of pages12
    JournalSystems and Computers in Japan
    Issue number13
    Publication statusPublished - 1992


    ASJC Scopus subject areas

    • Computational Theory and Mathematics
    • Hardware and Architecture
    • Information Systems
    • Theoretical Computer Science

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