Power-aware compiler controllable chip multiprocessor

Hiroaki Shikano, Jun Shirako, Yasutaka Wada, Keiji Kimura, Hironori Kasahara

    Research output: Contribution to journalArticle

    1 Citation (Scopus)


    A power-aware compiler controllable chip multiprocessor (CMP) is presented and its performance and power consumption are evaluated with the optimally scheduled advanced multiprocessor (OSCAR) parallelizing compiler. The CMP is equipped with power control registers that change clock frequency and power supply voltage to functional units including processor cores, memories, and an interconnection network. The OSCAR compiler carries Out coarse-grain task parallelization of programs and reduces power consumption using architectural power control support and the compiler's power saving scheme. The performance evaluation shows that MPEG-2 encoding on the proposed CMP with four CPUs results in 82.6% power reduction in real-time execution mode with a deadline constraint on its sequential execution time. Furthermore, MP3 encoding on a heterogeneous CMP with four CPUs and four accelerators results in 53.9% power reduction at 21.1-fold speed-up in performance against its sequentral execution in the fastest execution mode.

    Original languageEnglish
    Pages (from-to)432-439
    Number of pages8
    JournalIEICE Transactions on Electronics
    Issue number4
    Publication statusPublished - 2008 Apr



    • Chip multiprocessor
    • Frequency and voltage control
    • Parallelizing compiler

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials

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