NDLI: Multicore acceleration of priority-based schedulers for concurrency bug detection

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Multicore acceleration of priority-based schedulers for concurrency bug detection

Multicore acceleration of priority-based schedulers for concurrency bug detection

Content Provider	ACM Digital Library
Author	Musuvathi, Madanlal Burckhardt, Sebastian Nagarakatte, Santosh Martin, Milo M.K.
Abstract	Testing multithreaded programs is difficult as threads can interleave in a nondeterministic fashion. Untested interleavings can cause failures, but testing all interleavings is infeasible. Many interleaving exploration strategies for bug detection have been proposed, but their relative effectiveness and performance remains unclear as they often lack publicly available implementations and have not been evaluated using common benchmarks. We describe NeedlePoint, an open-source framework that allows selection and comparison of a wide range of interleaving exploration policies for bug detection proposed by prior work. Our experience with NeedlePoint indicates that priority-based probabilistic concurrency testing (the PCT algorithm) finds bugs quickly, but it runs only one thread at a time, which destroys parallelism by serializing executions. To address this problem we propose a parallel version of the PCT algorithm~(PPCT). We show that the new algorithm outperforms the original by a factor of 5x when testing parallel programs on an eight-core machine. We formally prove that parallel PCT provides the same probabilistic coverage guarantees as PCT. Moreover, PPCT is the first algorithm that runs multiple threads while providing coverage guarantees.
Starting Page	543
Ending Page	554
Page Count	12
File Format	PDF
ISBN	9781450312059
DOI	10.1145/2254064.2254128
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-06-11
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Multithreading Parallel testing Concurrency Probabilistic concurrency testing Priority-based scheduling
Content Type	Text
Resource Type	Article

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