Adaptive Pipeline Depth Control for Processor Power-Management

  • Authors:
  • Affiliations:
  • Venue:
  • ICCD '02 Proceedings of the 2002 IEEE International Conference on Computer Design: VLSI in Computers and Processors (ICCD'02)
  • Year:
  • 2002

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Abstract

A method of managing the power consumption of an embedded, single-issue processor by controlling its pipeline depth is proposed. The execution time will be increased but, if the method is applied to applications with slack time, the user-perceived performance may not be degraded. Two techniques are shown using an existing asynchronous processor as a starting point. The first method controls the pipeline occupancy using a token mechanism, the secondenables adjacent pipeline stages to be merged, by making the latches between them permanently' transparent. An energy reduction of up to 16% is measured, using a collection of five benchmarks.