Delay-bounded scheduling

  • Authors:
  • Michael Emmi;Shaz Qadeer;Zvonimir Rakamarić

  • Affiliations:
  • Université Paris Diderot, Paris, France;Microsoft Research, Redmond, WA, USA;University of British Columbia, Vancouver, BC, Canada

  • Venue:
  • Proceedings of the 38th annual ACM SIGPLAN-SIGACT symposium on Principles of programming languages
  • Year:
  • 2011

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Abstract

We provide a new characterization of scheduling nondeterminism by allowing deterministic schedulers to delay their next-scheduled task. In limiting the delays an otherwise-deterministic scheduler is allowed, we discover concurrency bugs efficiently---by exploring few schedules---and robustly---i.e., independent of the number of tasks, context switches, or buffered events. Our characterization elegantly applies to any systematic exploration (e.g., testing, model checking) of concurrent programs with dynamic task-creation. Additionally, we show that certain delaying schedulers admit efficient reductions from concurrent to sequential program analysis.