Re: Poor performance of G5 on GNOME's CPU benchmarks.
On Sun, 2008-08-03 at 17:56 +0200, Bastian Blank wrote:
> On Sun, Aug 03, 2008 at 05:32:26PM +0200, Michel Dänzer wrote:
> > On Sun, 2008-08-03 at 11:53 +0900, Charles Plessy wrote:
> > >
> > > The result is that on some particular types of computations, the G5
> > > performs extremely bad: something like twice slower as an old 1.5 Ghz
> > > Celeron machine. For some other tests, the performances of the
> > > processors scale with the frequency.
> >
> > Most likely, the x86 binaries tend to have optimizations for SSE/MMX
>
> Which x86 binaries?
The ones he ran on the Core 2 / Celeron CPUs.
> > whereas the powerpc binaries tend not to have VMX/Altivec optimizations.
>
> You need an CPU which supports Altivec first. Most of them does not.
The 970 aka G5 does though.
--
Earthling Michel Dänzer | http://tungstengraphics.com
Libre software enthusiast | Debian, X and DRI developer
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