[PATCH] smartsched: Tweak the default scheduler intervals

Mouse mouse at Rodents-Montreal.ORG
Tue Nov 5 10:03:05 PST 2013


> But then I read BSD's setitimer man page, and was suddenly very happy
> I run something else.  (Honestly, you're on the runqueue, you know
> how to set timers more finely than 100Hz and you already expect to be
> awake for the next 10ms, maybe do the trivial amount of integer math
> required to kick the timer interrupt both when the user asked for it
> and on the next scheduler tick.)

You don't say which BSD, nor which version; there is no single "BSD's
setitimer manpage".  But at least some of the BSDs run on hardware that
simply cannot do what you suggest.

Unless you think they should install a different setitimer manpage
depending on which hardware is in use (which has its own problems,
mostly involving human expectations).

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