A Time Complexity Bound for Adaptive Mutual Exclusion

  • Authors:
  • Yong-Jik Kim;James H. Anderson

  • Affiliations:
  • -;-

  • Venue:
  • DISC '01 Proceedings of the 15th International Conference on Distributed Computing
  • Year:
  • 2001

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Abstract

We consider the time complexity of adaptive mutual exclusion algorithms, where "time" is measured by counting the number of remote memory references required per critical-section access. We establish a lower bound that precludes a deterministic algorithm with O(log k) time complexity (in fact, any deterministic o(k) algorithm), where k is "point contention." In contrast, we show that expected O(log k) time is possible using randomization.