On reasoning with the global time assumption

  • Authors:
  • Ambuj K. Singh

  • Affiliations:
  • Univ. of California at Santa Barbara, Santa Barbara

  • Venue:
  • ACM Letters on Programming Languages and Systems (LOPLAS)
  • Year:
  • 1992

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Abstract

Concurrency in distributed systems is usually modeled by a nondeterministic interleaving of atomic events. The consequences of this interleaving (or global time) assumption on the specifications and proofs of distributed programs are examined in this paper. A construction for atomic registers is presented; this construction has the surprising property that it is correct with respect to a specification based on partial orders but is incorrect with respect to a naively derived specification based on global time.