On the relative dominance of paging algorithms

  • Authors:
  • Reza Dorrigiv;Alejandro López-Ortiz;J. Ian Munro

  • Affiliations:
  • Cheriton School of Computer Science, University of Waterloo, Waterloo, ON, N2L 3G1, Canada;Cheriton School of Computer Science, University of Waterloo, Waterloo, ON, N2L 3G1, Canada;Cheriton School of Computer Science, University of Waterloo, Waterloo, ON, N2L 3G1, Canada

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2009

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Abstract

In this paper, we give a finer separation of several known paging algorithms using a new technique called relative interval analysis. This technique compares the fault rate of two paging algorithms across the entire range of inputs of a given size, rather than in the worst case alone. Using this technique, we characterize the relative performance of LRU and LRU-2, as well as LRU and FWF, among others. We also show that look-ahead is beneficial for a paging algorithm, a fact that is well known in practice but it was, until recently, not verified by theory.