Reducing power with dynamic critical path information

  • Authors:
  • John S. Seng;Eric S. Tune;Dean M. Tullsen

  • Affiliations:
  • University of California, San Diego, La Jolla, CA;University of California, San Diego, La Jolla, CA;University of California, San Diego, La Jolla, CA

  • Venue:
  • Proceedings of the 34th annual ACM/IEEE international symposium on Microarchitecture
  • Year:
  • 2001

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Abstract

Recent research has shown that dynamic information regarding instruction criticality can be used to increase microprocessor performance. Critical path information can also be used in processors to achieve a better balance of power and performance. This paper uses the output of a dynamic critical path predictor to decrease the power consumption of key portions of the processor without incurring a corresponding decrease in performance. The optimizations include effective use of functional units with different power and latency characteristics and decreased issue logic power.