Python 程序如何确定它正在哪个内核上运行？

我需要调试一个使用以下命令的 Python 3 程序multiprocessing module.

我想跟踪（多核机器的）哪些核心正在使用以及如何使用。

Q:我正在寻找一种方法让 Python 代码确定哪个核心正在运行它。

我发现的最接近的是使用以下内容：

multiprocessing.current_process()._identity[0] - 1

Putting aside the fact that such code appears to be "going behind the API,"¹ as far as I can tell, the code that initializes the _identity attribute makes no reference to the underlying hardware², which I think is unsatisfactory.

^{1 For one thing, I can find no official documentation for the _identity attribute, as one would expect from the leading underscore in the name.
2 More specifically, this code evaluates something like next(_process_counter), where _process_counter is initially set to the value itertools.count(1), and uses the the result as the basis for the _identity attribute's value.}

这绝对是操作系统特定的问题，但以下是在 Windows 中执行此操作的方法（source）。正如评论中提到的，处理器编号可能会一直在变化，除非您专门将任务固定到给定的核心（超出了本答案的范围）。

from ctypes import *
from ctypes import wintypes

class PROCESSOR_NUMBER(Structure):
    _fields_ = [("Group", wintypes.WORD),
                ("Number", wintypes.BYTE),
                ("Reserved", wintypes.BYTE)]

pn = PROCESSOR_NUMBER()

windll.kernel32.GetCurrentProcessorNumberEx(byref(pn))

print(pn.Number)

Edit:适用于 Ubuntu 20.04.5 (WSL)

from ctypes import *
libc = CDLL("libc.so.6")
print(libc.sched_getcpu())