System.nanoTime（）是否在线程间保持一致？ [英] Is System.nanoTime() consistent across threads?

问题描述

我想计算两个事件之间经过的时间，以纳秒为单位。为此，我可以使用 System.nanoTime（），如上所述此处。问题是这两个事件发生在不同的线程中。

I want to count the time elapsed between two events in nanoseconds. To do that, I can use System.nanoTime() as mentioned here. The problem is that the two events are happening in different threads.

由于 nanoTime（）未返回绝对时间戳但是只能用来计算时间差异，我想知道我在两个不同线程上获得的值是否与两个事件之间经过的物理时间一致。

Since nanoTime() doesn't return an absolute timestamp but instead can only be used to calculate time differences, I'd like to know if the values I get on the two different threads are consistent with the physical time elapsed between the two events.

推荐答案

这是应该是，但由于有缺陷的内核或硬件，答案可能是否定的，至少在某些环境中是这样。

It's supposed to be, but due to buggy kernels or hardware, the answer can be no, at least in some environments.

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