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LightPlay: Efficient Replay with GPUs

Conference paper
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Part of the Lecture Notes in Computer Science book series (LNCS, volume 8967)

Abstract

Previous deterministic replay systems reduce the runtime overhead by either relying on hardware support or by relaxing the determinism requirements for replay. We propose LightPlay that fulfills stricter determinism requirements with low overhead without requiring hardware or OS support. LightPlay guarantees that the memory state after each instruction instance in a replay run is the same as in original run. It reduces logging overhead using a lightweight thread local technique that avoids synchronization between threads during the recording run. GPUs are used to efficiently identify the memory ordering constraints that produce the same memory states before the replay run. LightPlay incurs low space overhead for logging as it only stores the part of log where data races occur. During the logging run LightPlay is 20x–100x faster than logging the total order and requires only 1 % space overhead.

Keywords

Memory Access Time Slice Memory Instruction Data Race Runtime Overhead 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.NEC Laboratories AmericaPrincetonUSA
  2. 2.University of CaliforniaRiversideUSA

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