[mustpax]

Thanks for the correction. I was just talking about the de facto behavior I have seen on Linux and BSD for very short sleep intervals (way shorter than 1 second), not necessarily about the behavior as specified by the system call. I should have been clearer.

[tptacek]

I really don't think you've ever seen BSD return in milliseconds after a 1-second sleep. Respectfully, I think you're pretty much just wrong.

[mustpax]

Well, that is not what I meant at all, I meant that I've seen BSD return in say 2 microseconds after calling usleep(1).

But that's usleep not sleep, which is the inaccuracy I was admitting to in the first place.

[tptacek]

Ok, but (a) this article is talking about literally POSIX sleep(3), and (b) there is a ton of confusion on this thread about whether sleep is ms-denominated or seconds-denominated.

Sorry to pile on you, though.

[Dylan16807]

Read it again. He's talking about near-zero sleep calls, not one second sleep calls.

[tptacek]

POSIX sleep() doesn't take subsecond intervals. Maybe he's talking about usleep()?