Gentoo Archives: gentoo-performance

From: MAL <mal@×××××××.com>
To: kobyboy@××××××.com
Cc: gentoo-performance@g.o
Subject: [gentoo-performance] Re: getting athlon-xp/geforce4 system "on the top"
Date: Wed, 07 May 2003 10:13:48
Message-Id: 3EB8DC50.2050006@komcept.com
In Reply to: Re: [gentoo-performance] getting athlon-xp/geforce4 system "on the top" by Koby Boy
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

Subject Author
Re: [gentoo-performance] Re: getting athlon-xp/geforce4 system "on the top" Jan Jitse Venselaar <J.J.Venselaar@×××××××.nl>