compilation architecture

Jakub 'Livio' Rusinek jakub.rusinek at gmail.com
Tue Jan 15 13:07:30 UTC 2008


2008/1/15, Horst H. von Brand <vonbrand at inf.utfsm.cl>:
>
> Callum Lerwick <seg at haxxed.com> wrote:
>
> [...]
>
> > Not quite "three times" faster, but 3.26% faster with i686. A major
> > addition to the i686 architecture was cmov, and gcc is actually very
> > aggressive about eliminating branching using cmovs, increasing
> > performance on modern deeply pipelined processors by eliminating
> > pipeline stalls.
>
> [...]
>
> > I suggest all key performance critical packages be made available in
> > both i386 and i686 versions. glibc and openssl already do this. Off the
> > top of my head, this would include Mesa, I know for a fact the majority
> > of Second Life runtime is actually consumed by T&L inside Mesa/DRI. From
> > what I understand, even Intel's latest chipsets lack hardware T&L. Makes
> > sense, it helps sell more multi-core Intel processors, and probably
> > helps consolidate power management.
>
> Twice the size for 3% improvement in extremely CPU-intensive tasks, and no
> gain whatsoever in load time, etc? That will translate to < 1% improvement
> overall. Lost in the noise, anyway. Not worth it in my book.
> --
> Dr. Horst H. von Brand                   User #22616 counter.li.org
> Departamento de Informatica                    Fono: +56 32 2654431
> Universidad Tecnica Federico Santa Maria             +56 32 2654239
> Casilla 110-V, Valparaiso, Chile               Fax:  +56 32 2797513
>
> --
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>

So what in your opinion should be made to make Fedora faster?

-- 
Jakub 'Livio' Rusinek
http://liviopl.jogger.pl/
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