nginx-0.8.29

[Steve]

-------- Original-Nachricht --------
> Datum: Mon, 30 Nov 2009 18:05:48 +0300
> Von: Igor Sysoev <igor at sysoev.ru>
> An: nginx at nginx.org
> Betreff: Re: nginx-0.8.29

> On Mon, Nov 30, 2009 at 04:00:08PM +0100, Steve wrote:
> 
> > > > > On Mon, Nov 30, 2009 at 02:55:00PM +0100, Steve wrote:
> > > > > 
> > > > > > >     *) Feature: the --with-libatomic[=DIR] option in the
> > > configure.
> > > > > > >        Thanks to W-Mark Kubacki.
> > > > > > > 
> > > > > > What is this libatomic? Is it this here ->
> > > > > http://www.hpl.hp.com/research/linux/atomic_ops/
> > > > > 
> > > > > Yes.
> > > > > 
> > > > Is that needed if one is using GCC >= 4.1? Or is this already used
> (in
> > > some way) by this here:
> > > > >     *) Feature: GCC 4.1+ built-in atomic operations usage.
> > > > >        Thanks to W-Mark Kubacki.
> > > 
> > > If GCC supports atomic operations, then nginx uses them. Otherwise, it
> > > uses
> > > own atomic operations for i386, amd64, sparc32/64, ppc32/64.
> > > 
> > > You may force to use libatomic, if you do not like GCC atomic
> operations.
> > > 
> > Okay. I understand. Is there any benefit using libatomic?
> 
> GCC built-ins are better at least for i386 and amd64.
> libatomic is better for ARM:
> http://nginx.org/pipermail/nginx/2009-September/015726.html
> 
Thanks for explaining that to me.


> 
> -- 
> Igor Sysoev
> http://sysoev.ru/en/
> 
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