multiprocessing.cpu_count returning wrong number of cores

Question

I try to use the following code to decide the number of cores of my laptop:

import multiprocessing
multiprocessing.cpu_count()

The result is 8, but when I open the system report, I can see that I have only 1 CPU with 4 cores.

What's wrong with cpu_count() ?

Answer 1

You have 4 physical cores, but 8 logical processors. For example, you may have a processor with hyper-threading .

From SuperUser: Difference Between Cores and Processors

Answer 2

你有什么CPU，它可能是计算物理核心+虚拟核心。