In the realm of multithreading, precise control over thread sleep duration is crucial. While Unix systems offer a diverse array of sleep functions, Windows natively provides only Sleep with millisecond granularity. This can pose a challenge for applications requiring sub-millisecond sleep intervals.
The inability to achieve sub-millisecond sleep on Unix stems from the system call select, which, contrary to popular belief, does not guarantee precise sleep durations. The time specified is merely a minimum, and the thread may be scheduled for execution at a much later point, especially if other threads are actively processing.
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