The Nonuniform Distribution of Instruction-Level and Machine Parallelism and its Effect on Performance

  • Authors:
  • N. P. Jouppi

  • Affiliations:
  • -

  • Venue:
  • IEEE Transactions on Computers
  • Year:
  • 1989

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Abstract

A methodology for quickly estimating machine performance is developed. A first-order estimate is based on the average degree of machine parallelism. A second-order model corrects for the effects of nonuniformities in instruction-level and machine parallelism and is shown to be accurate to within 15% for three widely different machine pipelines: the CRAY-1, the MultiTitan, and a dual-issue superscalar machine.