Starvation-free transactional memory-system protocols

  • Authors:
  • Mridha Mohammad Waliullah;Per Stenstrom

  • Affiliations:
  • Department of Computer Science and Engineering, Chalmers University of Technology, Göteborg, Sweden;Department of Computer Science and Engineering, Chalmers University of Technology, Göteborg, Sweden

  • Venue:
  • Euro-Par'07 Proceedings of the 13th international Euro-Par conference on Parallel Processing
  • Year:
  • 2007

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Abstract

Transactional memory systems trade ease of programming with runtime performance losses in handling transactions. This paper focuses on starvation effects that show up in systems where unordered transactions are committed on a demand-driven basis. Such simple commit arbitration policies are prone to starvation. The design issues for commit arbitration policies are analyzed and novel policies that reduce the amount of wasted computation due to roll-back and, most importantly, that avoid starvation are proposed. We analyze in detail how to incorporate them in a TCC-like transactional memory protocol. The proposed schemes have no impact on the common-case performance and add quite modest complexity to the baseline protocol.