Effects of storage contention on system performance

  • Authors:
  • C. E. Skinner;J. R. Asher

  • Affiliations:
  • -;-

  • Venue:
  • IBM Systems Journal
  • Year:
  • 1969

Quantified Score

Hi-index 0.05

Visualization

Abstract

This paper presents a mathematical model to measure the amount by which a computer's speed is reduced when it time-shares storage with other computers and I/O channels. The method can be applied to any number of processors and/or channels and storage units, although the complexity of the solution does increase rapidly as the number of processors increases. Explicit formulas and numerical results are given for several special cases. The results of a simulation of a shared-memory multiprocessor are presented, showing how closely the mathematical model fits the operation of a simulated system.