每个处理器产生多个线程是有意义的吗？ [英] Does it make sense to spawn more than one thread per processor?

问题描述

从逻辑角度来看，应用程序可能需要几十或几百个线程，其中一些线程将在大多数时间内休眠，但是少数线程将始终并发运行。问题是：在系统中生成比处理器更多的并发线程有意义吗？还是浪费？

From a logical point of view an application may need dozens or hundreds of threads, some of which will we sleeping most of the time, but a very few will be always running concurrently. The question is: Does it make any sense to spawn more concurrent threads than processors there are in a system, or it is a waste?

我看过一些服务器应用程序实现一个调度程序来逻辑管理任务（通常称为作业），但也产生了很多线程，所以我看不到的好处是什么。

I've seen some server applications that implement a scheduler to logically manage tasks (often called jobs), but also spawning a lot of threads, so I don't see where the benefit is.

感谢。

推荐答案

当然。如果您的软件频繁使用磁盘或网络IO，您通常可以通过添加几个线程来提高吞吐量。这些额外的线程将被唤醒并做其他线程阻塞IO。

Sure. If your software makes frequent use of disk or network IO, you can often improve throughput by adding a few more threads. Those extra threads will be awake and doing stuff while the other threads are blocking on IO.

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