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  1. Apache Arrow
  2. ARROW-2479

[C++] Have a global thread pool

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    Details

    • Type: Wish
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.10.0
    • Component/s: C++

      Description

      A few parts of Arrow have started spawning threads to parallelize CPU-bound tasks. They do so by launching a hard-coded number of threads, disregarding machine configuration or the fact that Arrow itself might be used from several threads at once (so hardcoding 8 threads might end up launch N * 8 threads if the user is calling Arrow from N threads at once...).

      Instead we probably want a global thread pool policy, with a singleton thread pool for CPU-bound tasks (using, by default, a number of threads equal to the machine's capacity).

      See discussion in https://github.com/apache/arrow/pull/1893

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              • Assignee:
                pitrou Antoine Pitrou
                Reporter:
                pitrou Antoine Pitrou
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