On Thu, Dec 13, 2018 at 09:27:12PM +0000, Paul Swanson wrote: > Hi, > > I'm trying to understand how interval timers work in OpenBSD, > but I'm a little stuck on this line from the getitimer / setitimer man page: > > "Time values smaller than the resolution of the system clock > are rounded up to this resolution (typically 10 milliseconds)." > > Does this mean that 10 milliseconds is the shortest interval possible > with a system interval timer? > > If so, are there other userland options for more precise timers? > > I'm mainly interested in AMD64. > > Thanks in advance, > > Paul
The resolution of the system clock is governed by hz. man 9 hz On amd64, it's set to 100, which means 10ms. We don't have a tickless model to support arbitrary precision timers. -ml
