如何持续占用80％的CPU？ [英] How to occupy 80% CPU consistently?

问题描述

我正在寻找一种以一致的方式完全占据单个CPU的80％（或任何其他数量）的方法。

对于某些测试触发组件的单元测试，我需要这样做在特定的CPU利用率条件下

为此，我可以假设计算机处于空闲状态。

I'm looking for a way to occupy exactly 80% (or any other number) of a single CPU in a consistent manner.
I need this for some unit test that tests a component that triggers under specific CPU utilization conditions
For this purpose I can assume that the machine is otherwise idle.

什么是健壮且可能独立于操作系统的方法？

What's a robust and possibly OS independent way to do this?

推荐答案

80％的时间都不会占用CPU。 CPU始终处于使用状态或空闲状态。在一段时间内，您可以使平均使用率达到80％。您是否需要一个特定的时间段进行平均？此伪代码应可在各种平台上工作，并且超过1秒的CPU使用率为80％：

There is no such thing as occupying the CPU 80% of the time. The CPU is always either being used, or idle. Over some period of time, you can get average usage to be 80%. Is there a specific time period you want it to be averaged over? This pseudo-code should work across platforms and over 1 second have a CPU usage of 80%:

while True:
    startTime = time.now()
    while date.now() - startTime < 0.8:
        Math.factorial(100) // Or any other computation here
    time.sleep(0.2)

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