Gentoo Logo
Gentoo Spaceship




Note: Due to technical difficulties, the Archives are currently not up to date. GMANE provides an alternative service for most mailing lists.
c.f. bug 424647
List Archive: gentoo-performance
Navigation:
Lists: gentoo-performance: < Prev By Thread Next > < Prev By Date Next >
Headers:
To: kobyboy@...
From: MAL <mal@...>
Subject: Re: getting athlon-xp/geforce4 system "on the top"
Date: Wed, 07 May 2003 11:13:36 +0100
Koby Boy wrote:
> On Tue, 2003-05-06 at 03:24, eNTi wrote:
>>CFLAGS="-mcpu=athlon-xp -O3 -pipe -m3dnow -msse -mmmx -Wall -fomit-frame-pointer" / CHOST="i686-pc-linux-gnu"
> 
> I've got an Athon-XP 2400 (2 GHz) but I've over clocked it to the
> equivalent of an Athlon-XP 2600 (2.2GHz).  My CFLAGS look like this:
> 
> CFLAGS="-mcpu=athlon-xp -march=athlon-xp -O3 -fforce-addr
> -fomit-frame-pointer -funroll-loops -frerun-cse-after-loop
> -frerun-loop-opt -falign-functions=4 -foptimize-sibling-calls
> -fexpensive-optimizations -pipe -m3dnow -mmmx -msse -mfpmath=sse,387"

-march=athlon-xp implies:
   -mcpu=athlon-xp

-march=athlon-xp implies:
   -m3dnow
   -mmmx
   -msse

-O3 implies -O2 which implies:
   -frerun-loop-opt
   -frerun-cse-after-loop
   -frerun-loop-opt
   -falign-functions
   -fexpensive-optimizations

-mfpmath=sse,387 is still unstable.. asking for trouble!

Lastly, many people have expressed that -funroll-loops slows down more 
code than it speeds up.

I'd be surprised if you see much improvement over '-O3 -pipe', in 99% of 
apps, not worth it's time in debugging broken code :/

man gcc *g*

MAL


--
gentoo-performance@g.o mailing list

Replies:
Re: Re: getting athlon-xp/geforce4 system "on the top"
-- Jan Jitse Venselaar
References:
getting athlon-xp/geforce4 system "on the top"
-- eNTi
Re: getting athlon-xp/geforce4 system "on the top"
-- Koby Boy
Navigation:
Lists: gentoo-performance: < Prev By Thread Next > < Prev By Date Next >
Previous by thread:
Re: getting athlon-xp/geforce4 system "on the top"
Next by thread:
Re: Re: getting athlon-xp/geforce4 system "on the top"
Previous by date:
Re: getting athlon-xp/geforce4 system "on the top"
Next by date:
Re: Re: getting athlon-xp/geforce4 system "on the top"


Updated Jun 17, 2009

Summary: Archive of the gentoo-performance mailing list.

Donate to support our development efforts.

Copyright 2001-2013 Gentoo Foundation, Inc. Questions, Comments? Contact us.