Placement-proximity-based voltage island grouping under performance requirement

Huaizhi Wu, Martin D.F. Wong, I. Min Liu, Yusu Wang

Research output: Contribution to journalArticlepeer-review


High power consumption not only leads to short battery life for hand-held devices but also causes on-chip thermal and reliability problems in general. As power consumption is proportional to the square of supply voltage, reducing supply voltage can significantly reduce power consumption. Multi-supply voltage (MSV) has previously been introduced to provide finer grain power and performance tradeoff. In this paper, we propose a methodology on top of a set of algorithms to exploit nontrivial voltage island boundaries for optimal power versus design-cost tradeoff under performance requirement. Our algorithms are efficient, robust, and error-bounded and can be flexibly tuned to optimize for various design objectives (e.g., minimal power within a given number of voltage islands, or minimal fragmentation in voltage islands within a given power bound) depending on the design requirement. Our experiment on real industry designs shows a tenfold improvement of our method over current logical-boundary-based industry approach.

Original languageEnglish (US)
Article number4237245
Pages (from-to)1256-1269
Number of pages14
JournalIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Issue number7
StatePublished - Jul 2007


  • Low power
  • Optimization, timing
  • Voltage island

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering


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