Re: kqueue()/kevent(), select() and poll()

[Doug White]

On Sat, 18 Nov 2000, Maxime Henrion wrote:

   Hi,
 
 I was wondering if it was reasonnable to implement the select() and poll()
 system calls as kqueue()/kevent() wrappers. This would make any application
 using these system calls benefit from the performance improvements of the new
 kernel thread.
 
 Do you think it's possible and that it won't cause some portability problems ?

Also, select() works on more descriptors than kqueue/kevent() does
currently (i.e. NFS).

Doug White|  FreeBSD: The Power to Serve
[EMAIL PROTECTED] |  www.FreeBSD.org



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Re: kqueue()/kevent(), select() and poll()

[Alfred Perlstein]

* Maxime Henrion [EMAIL PROTECTED] [001118 06:03] wrote:
   Hi,
 
 I was wondering if it was reasonnable to implement the select() and poll()
 system calls as kqueue()/kevent() wrappers. This would make any application
 using these system calls benefit from the performance improvements of the new
 kernel thread.
 
 Do you think it's possible and that it won't cause some portability problems ?

It would just cause more overhead.  To implement select()/poll() using
kevent would necessitate building up an eventlist that was comprised of
EVFILT_ONESHOT events, then after return or timeout clearing the
events that hadn't fired.

-- 
-Alfred Perlstein - [[EMAIL PROTECTED]|[EMAIL PROTECTED]]
"I have the heart of a child; I keep it in a jar on my desk."


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