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zckun

Python multiprocessing ValueError

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  •   zckun Jun 28, 2020 3585 views
    This topic created in 2132 days ago, the information mentioned may be changed or developed.

    机器配置: Windows 10 企业版 64 位 Intel(R) Xeon(R) Platinum 8173M 内核:56 逻辑处理器:112

    用 python multiprocessing 中的进程池会出现 ValueError: need at most 63 handles, got a sequence of length 114

    这是 windows 才会有的异常么,很少用 windows,也第一次用这种 U,google 也找不到什么答案

    3 replies    2020-06-28 21:36:23 +08:00
    UN2758
        1
    UN2758  
       Jun 28, 2020
    可能和 numa 有关?win10 设计是 64 个核心一个 numa 调度,可能是这方面的问题
    hareandlion
        2
    hareandlion  
       Jun 28, 2020   2
    貌似有人提过类似的 bug
    https://bugs.python.org/issue26903

    CPython 底层源码里 max_workers 加了限制
    https://github.com/python/cpython/commit/39889864c09741909da4ec489459d0197ea8f1fc

    看 issue 的状态是已经在 3.7 和 3.8 版本里修复了,更新一下 Python 版本试试?
    这种硬件超过软件设计的情况也算难得了吧
    volvo007
        3
    volvo007  
       Jun 28, 2020
    win10 有个 workstation 版本,这个能解决核心的调度问题吗?
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