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SubjectRe: kqueue microbenchmark results
On Wed, Oct 25, 2000 at 09:40:53PM +0200, Jamie Lokier wrote:
> Simon Kirby wrote:
> > And you'd need to take the descriptor out of the read() set in the
> > select() case anyway, so I don't really see what's different.
>
> The difference is that taking a bit out of select()'s bitmap is
> basically free. Whereas the equivalent with events is a bind_event()
> system call.

With the caveat that kevent() will take a changelist at the same time
that it returns an eventlist, so while you do incur some kernel processing
to temporarily disable the descriptor, the system call is essentially
free.
--
Jonathan
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