Is System.nanoTime() consistent across threads?

Question

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.

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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.

Answer 1

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