确定CPU使用率 [英] Determining CPU utilization

问题描述

是否有一个命令或任何其他方式在Linux中获取当前或平均 CPU利用率（用于多处理器环境）？

Is there a command or any other way to get the current or average CPU utilization (for a multi-processor environment) in Linux?

我在一个小系统中使用嵌入式Linux。基本上，我需要确定CPU利用率，因此，如果它是高的，我可以代替转移的新工艺到另一个控制器在系统中，而不是主处理器，它可以是忙于一个更重要的过程上执行的。

I am using embedded Linux in a small system. Basically, I need to determine the CPU utilization, so that if it is high, I can instead divert a new process to another controller in the system, rather than executing on the main processor, which could be busy doing a more important process.

这问题不是仅仅优先处理，其他控制器足以处理新工艺，只是当主处理器不忙，我想preFER它做的执行。

This question is not about merely prioritizing processes, the other controller can sufficiently handle the new process, just that when the main processor is not busy, I would prefer it to do the execution.

推荐答案

您需要两次采样在的/ proc / STAT 的值，并计算平均利用率在这段时间。 （瞬时利用率不作一大堆意义 - 它永远是单核的机器上100％，因为你的utilsation测量code运行时，它看起来）。

You need to sample the values in /proc/stat at two times, and calculate the average utilisation over that time. (Instantaneous utilisation doesn't make a whole lot of sense - it'll always be 100% on a single core machine, since your utilsation-measuring code is running whenever it looks).

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