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  1. JDK
  2. JDK-8140793

getAvailableProcessors may incorrectly report the number of cpus in Docker container

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Details

    • Bug
    • Resolution: Duplicate
    • P4
    • None
    • 8, 9
    • hotspot

    Description

      OperatingSystemMXBean.getAvailableProcessors should return the number of processors made available to the process. Docker can place limits on it.
      Mis-reporting the number can throw off heuristics for optimizing computations based on memory size and available processors.
      It is hinted that the number of processors reported from /proc on linux reports the hardware processors not those permitted to the process.

      sysconf(_SC_NPROCESSORS_CONF) may be more reliable in this case.

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              Unassigned Unassigned
              rriggs Roger Riggs
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                Updated:
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