What are the best CFLAGS for Athlon XP 2000+ ?

sH · 2007-08-26 06:33:35

Hello everyone.

I want to make some packages faster
What are the best settings for makepkg.conf for the Athlon XP 2000+ ?

So far I just changed the "march" line to athlon-xp, though I don't know if this exists at all
Would appreciate any help! Thanks.

#
CARCH="i686"
CHOST="i686-pc-linux-gnu"

#-- Exclusive: will only run on i686
# -mtune builds exclusively for an architecture
# -mcpu optimizes for an architecture, but builds for the whole processor family
CFLAGS="-march=athlon-xp -mtune=generic -O2 -pipe"
CXXFLAGS="-march=athlon-xp -mtune=generic -O2 -pipe"
#-- Make Flags: change this for DistCC/SMP systems
#MAKEFLAGS="-j2"

PS: Are there any groovy things I can tell the configure script of xvidcore to tune it for Athlon XP?

Last edited by sH (2007-08-26 06:40:26)

qlus · 2007-08-26 07:00:19

http://wiki.archlinux.org/index.php/Safe_Cflags

shining · 2007-08-26 07:20:00

sH wrote:

I want to make some packages faster

Then start hacking and improve their code

[vEX] · 2007-08-26 11:46:46

I think -mtune=native would enable all CPU wise optimisations available for your CPU and should therefor be better than using -mtune=generic, there is a thread somewhere on the forums about the -mtune=native switch.

sH · 2007-08-26 15:07:12

Thanks alot. 3fps more with xvid Thanks for the link to the gentoo site. Very useful.

mrbug · 2007-08-26 21:16:53

CFLAGS="-09 -march=s6000 -pipe=65536 -funroll-every-loop -mrice -mabi=rice -omg-optimized --disable-all-instructions -DREENABLE_FAST_EXECUTION -feverything-at-once -Wl,--wait-all"
CXXFLAGS="${CFLAGS} -muse-gcc"
LDFLAGS="-04 -static -Rsymbols"

(it's a joke)

heleos · 2007-08-26 21:24:39

mrbug wrote:

CFLAGS="-09 -march=s6000 -pipe=65536 -funroll-every-loop -mrice -mabi=rice -omg-optimized --disable-all-instructions -DREENABLE_FAST_EXECUTION -feverything-at-once -Wl,--wait-all"
CXXFLAGS="${CFLAGS} -muse-gcc"
LDFLAGS="-04 -static -Rsymbols"

(it's a joke)

Ut oh......

(kidding )

shining · 2007-08-26 21:32:54

Maybe it's not that stupid to try optimizing for an app as cpu intensive as a video encoder.
There might be better ways though : changing the option of the encoder itself usually have a much bigger effect.
Also trying other encoders to see if they are more performant.

mrbug · 2007-08-27 02:33:42

Seriously, though... I'm running this:
CFLAGS="-O2 -march=pentium4 -msse2 -mfpmath=ssei -pipe -mtune=native"

It seems to be pretty sane with enough optimizations to speed up video encoding through the use of processor blahblah

I have noticed that mplayer loads a little quicker than with the defaults (using time). The biggest suggestion that anyone can make would be to stop ALL unnecessary processes. You don't need to run GNOME and Pidgin and Firefox and Transmission and ........... to encode video, so it'd be best to not do that.

I usually start en/transcodes before I goto bed. That way, it doesn't matter how long it takes.

Arch Linux

#1 2007-08-26 06:33:35

What are the best CFLAGS for Athlon XP 2000+ ?

#2 2007-08-26 07:00:19

Re: What are the best CFLAGS for Athlon XP 2000+ ?

#3 2007-08-26 07:20:00

Re: What are the best CFLAGS for Athlon XP 2000+ ?

#4 2007-08-26 11:46:46

Re: What are the best CFLAGS for Athlon XP 2000+ ?

#5 2007-08-26 15:07:12

Re: What are the best CFLAGS for Athlon XP 2000+ ?

#6 2007-08-26 21:16:53

Re: What are the best CFLAGS for Athlon XP 2000+ ?

#7 2007-08-26 21:24:39

Re: What are the best CFLAGS for Athlon XP 2000+ ?

#8 2007-08-26 21:32:54

Re: What are the best CFLAGS for Athlon XP 2000+ ?

#9 2007-08-27 02:33:42

Re: What are the best CFLAGS for Athlon XP 2000+ ?

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