Can memory be used adaptively by uniform algorithms?

  • Authors:
  • Burkhard Englert;Darin Goldstein

  • Affiliations:
  • Dept. of Comp. Engr. & Comp. Science, California State University Long Beach, Long Beach, CA;Dept. of Comp. Engr. & Comp. Science, California State University Long Beach, Long Beach, CA

  • Venue:
  • OPODIS'05 Proceedings of the 9th international conference on Principles of Distributed Systems
  • Year:
  • 2005

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Abstract

We introduce a novel term, memory-adaptive, that intuitively captures what it means for a distributed protocol to most efficiently make use of its shared memory. We also prove three results that relate to our memory-adaptive model. In our store/release protocols processors are required to store a value in shared MWMR memory so that it cannot be overwritten until it has been released by the processor. We show that there do not exist uniformly wait-free store/release protocols using only the basic operations read and write that are memory-adaptive to point contention. We further show that there exists a uniformly wait-free store/release protocol using only the basic operations read and write that is memory-adaptive to total contention. We finally show that there exists a uniformly wait-free store/release protocol using only the basic operations read, write, and write-plus that is memory-adaptive to interval contention and time-adaptive to total contention.