Stratified random sampling for power estimation

  • Authors:
  • Chih-Shun Ding;Cheng-Ta Hsieh;Qing Wu;Massoud Pedram

  • Affiliations:
  • Department of Electrical Engineering - Systems, University of Southern California, Los Angeles, CA;Department of Electrical Engineering - Systems, University of Southern California, Los Angeles, CA;Department of Electrical Engineering - Systems, University of Southern California, Los Angeles, CA;Department of Electrical Engineering - Systems, University of Southern California, Los Angeles, CA

  • Venue:
  • Proceedings of the 1996 IEEE/ACM international conference on Computer-aided design
  • Year:
  • 1997

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Abstract

In this paper, we propose a statistical power evaluation framework at the RT-level. We first discuss the power macro-modeling formulation, and then propose a simple random sampling technique to alleviate the the overhead of macro-modeling during RTL simulation. Next, we describe a regression estimator to reduce the error of the macro-modeling approach. Experimental results indicate that the execution time of the simple random sampling combined with power macro-modeling is 50 X lower than that of conventional macro-modeling while the percentage error of regression estimation combined with power macro-modeling is 16 X lower than that of conventional macro-modeling. Hence, we provide the designer with options to either improve the accuracy or the execution time when using power macro-modeling in the context of RTL simulation.