Performance evaluation of compiler controlled power saving scheme

Jun Shirako, Munehiro Yoshida, Naoto Oshiyama, Yasutaka Wada, Hirofumi Nakano, Hiroaki Shikano, Keiji Kimura, Hironori Kasahara

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    Multicore processors, or chip multiprocessors, which allow us to realize low power consumption, high effective performance, good cost performance and short hardware/software development period, are attracting much attention. In order to achieve full potential of multicore processors, cooperation with a parallelizing compiler is very important. The latest compiler extracts multilevel parallelism, such as coarse grain task parallelism, loop parallelism and near fine grain parallelism, to keep parallel execution efficiency high. It also controls voltage and clock frequency of processors carefully to reduce energy consumption during execution of an application program. This paper evaluates performance of compiler controlled power saving scheme which has been implemented in OSCAR multigrain parallelizing compiler. The developed power saving scheme realizes voltage/frequency control and power shutdown of each processor core during coarse grain task parallel processing. In performance evaluation, when static power is assumed as one-tenth of dynamic power, OSCAR compiler with the power saving scheme achieved 61.2 percent energy reduction for SPEC CFP95 applu without performance degradation on 4 processors and 87.4 percent energy reduction for mpeg2encode, 88.1 percent energy reduction for SPEC CFP95 tomcatv and 84.6 percent energy reduction for applu with real-time deadline constraint on 4 processors.

    Original languageEnglish
    Title of host publicationLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
    Pages480-493
    Number of pages14
    Volume4759 LNCS
    Publication statusPublished - 2008
    Event6th International Symposium on High Performance Computing, ISHPC 2005 and 1st International Workshop on Advanced Low Power Systems, ALPS 2006 - 6th International Symposium on High
    Duration: 2005 Sep 72005 Sep 9

    Publication series

    NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
    Volume4759 LNCS
    ISSN (Print)03029743
    ISSN (Electronic)16113349

    Other

    Other6th International Symposium on High Performance Computing, ISHPC 2005 and 1st International Workshop on Advanced Low Power Systems, ALPS 2006
    City6th International Symposium on High
    Period05/9/705/9/9

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    ASJC Scopus subject areas

    • Computer Science(all)
    • Biochemistry, Genetics and Molecular Biology(all)
    • Theoretical Computer Science

    Cite this

    Shirako, J., Yoshida, M., Oshiyama, N., Wada, Y., Nakano, H., Shikano, H., Kimura, K., & Kasahara, H. (2008). Performance evaluation of compiler controlled power saving scheme. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 4759 LNCS, pp. 480-493). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 4759 LNCS).