On parallel searching (Extended Abstract)

  • Authors:
  • Marc Snir

  • Affiliations:
  • -

  • Venue:
  • PODC '82 Proceedings of the first ACM SIGACT-SIGOPS symposium on Principles of distributed computing
  • Year:
  • 1982

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Abstract

We investigate the complexity of seaching by comparisons a table of n elements on a synchronous, shared memory parallel computer with p processors. We show that O(lgn) steps are required if concurrent access to the same memory cell is not allowed, whereas only O(lgn/lgp) steps are required if simultaneous reads are allowed. We next show that it is possible to search in O(lg(n)/p) steps if more general operations are used.