Eventlet超时未退出 [英] Eventlet timeout not exiting

问题描述

为什么eventlet允许它完成6秒，而在5秒后应该退出缩进?

Why does eventlet allow it to finish the 6 seconds, when it should exit the indentation after 5 seconds?

>>> with eventlet.Timeout(5):
        time.sleep(6)
        x = 1
>>> x
1

推荐答案

Eventlet提供了协作式多线程.这意味着您需要放弃控制，以使集线器或协程(在这种情况下，集线器实现超时)有运行的机会.要进行产量控制:

Eventlet provides cooperative multithreading. Which means you need to yield control to give hub or coroutines (in this case, hub implements timeouts) chance to run. To yield control:

• 使用绿色版本的IO和睡眠
• 或执行eventlet.monkey_patch()，现在您可以使用常规的time，socket等模块，并与Eventlet合作用绿色"版本代替.

• either use green versions of IO and sleep
• or execute eventlet.monkey_patch(), now you can use regular time, socket, etc modules, replaced by "green" versions, cooperating with Eventlet.

任何没有绿色调用的CPU严格代码，例如[_ for _ in xrange(1000000000)]都根本无法中断.如果您发现自己处于类似情况，请将eventlet.sleep(0)放在循环中的某个位置，它将进入Eventlet集线器并允许超时工作.

Any CPU tight code without green calls, for example [_ for _ in xrange(1000000000)] is impossible to interrupt at all. If you find yourself in similar situation, place eventlet.sleep(0) somewhere in loop, that would enter Eventlet hub and allow timeouts to work.

这篇关于Eventlet超时未退出的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！