"""In CPython, the global interpreter lock, or GIL, is a mutex that prevents multiplenative threads from executing Python bytecodes at once. This lock is necessary mainlybecause CPython’s memory management is not thread-safe. (However, sinc…
GIL全局解释器锁 1.什么是GIL 官方解释:'''In CPython, the global interpreter lock, or GIL, is a mutex that prevents multiple native threads from executing Python bytecodes at once. This lock is necessary mainly because CPython’s memory management is not thread-safe…
一.线程队列 队列特性:取一个值少一个,只能取一次,没有值的时候会阻塞,队列满了,也会阻塞 queue队列 :使用import queue,用法与进程Queue一样 queue is especially useful in threaded programming when information must be exchanged safely between multiple threads. 三种类型: (1)先进先出 (fifo) q=queue.Queue 先进先出队列 (2)#后进…
我们使用高并发,一次是创建1万个线程去修改一个数并打印结果看现象: from threading import Thread import os def func(args): global n n = args print(n, os.getpid()) n = 100 t_list = [] for i in range(10000): t = Thread(target=func, args=(i,)) t.start() t_list.append(t) for t in t_list:…
