Re: [Bug-gnubg] Optimization For Athlon Chip?

[Achim Mueller]

Am So, 2003-02-16 um 11.19 schrieb Morten Wang:
> * address@hidden
> > Is it possible to optimize GNU for the Athlon chip?
> 
> Mine is, but it's a linux-version, and built locally.  I'm running
> configure like this (with gcc 3.2.1):
> 
> ./configure CFLAGS="-O3 -march=athlon-xp -mcpu=athlon-xp -mfpmath=sse"
> 
> I'm not sure if the speed increase from optimizing for Athlons is
> actually noticeable.  I could do some testing locally if anyone's
> interested.

I did a lot of experiments with compiler optimisation on a Gentoo-Linux
system. My experiences are, that you loose more time while finding
another 0.5 or 1% using a certain compiler flag.

It may sound silly, but for practical reasons it seems cheaper buying a
better board, ram and processor than getting frustated while watching
undefinably segmentation faults, system freezings or similar occurances.

But what I can do today is compiling gnubg-stable on a FreeBSD (Athlon
2200, MSI KT3V, 500MB DDR ram) with these or even more sharp options and
do a longer rollout comparing it with my usual gnubg-stable. I bet it
will be less than 2% gain.

Ciao

Achim

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achim mueller, anne-frank-str. 25, D-48431 rheine
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