cvs commit: src/lib/libnetgraph internal.h msg.c

John Baldwin jhb at freebsd.org
Mon May 14 22:00:37 UTC 2007


On Monday 14 May 2007 05:11:33 pm Poul-Henning Kamp wrote:
> In message <200705141645.55584.jhb at freebsd.org>, John Baldwin writes:
> >On Monday 14 May 2007 10:18:41 am Alexander Motin wrote:
> 
> >>   Log:
> >>   Replace select() by poll() to avoid problems with big
> >>   descriptor number.
> >
> >Why not kevent(2)?
> 
> kevent(2) is most useful if you have many descriptors open
> (ie: apache).

Hmm, some other things use it too even with few fd's such as the name resolver 
in libc.
 
> poll(2) works quite well for a low number of descriptors,
> and doesn't care what their numeric numbers are.
> 
> select(2) is terrible unless you have a limited number of descriptors
> and they are all low numbered.  This is because of the array
> representation.
> 
> 
> Given that poll(2) is a much simpler API than kqueue(2), I'd
> say it was the right choice here.

That's fine, was just asking. :)

-- 
John Baldwin


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