Python池图和选择进程数 [英] Python pool map and choosing number of processes

问题描述

在设置进程数时，我很想看看我的机器上实际可以使用多少个线程-如何找到这个?有没有办法确定我可用的线程数?

In setting the number of processes, I'd be keen to see how many threads I can actually use on my machine - how do I find this? Is there a way to determine the number of threads available to me?

推荐答案

您是否想知道 CPU数量?

根据 docs ，您启动一个池并且不区分进程数量，默认数量是系统上的cpu数量:

According to the docs, when you start a pool and don't sepecify the number of processes, the default number is the number of cpu's on the system:

processes是要使用的辅助进程数.如果进程为None，则使用cpu_count()返回的数字.如果初始值设定项不为None，则每个工作进程在启动时都会调用初始值设定项(* initargs).

processes is the number of worker processes to use. If processes is None then the number returned by cpu_count() is used. If initializer is not None then each worker process will call initializer(*initargs) when it starts.

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