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zrebec
Tux's lil' helper
Joined: 07 Dec 2004
Posts: 129
Location: Bratislava / Slovakia
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 Posted: Fri Dec 17, 2004 9:36 am Post subject: Complete HW Update == reinstal gentoo? |
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Hello,
I have a new base HW components ;o) Before I had AMD Athlon XP processor, MSI MainBoard, 3Com Network card.
Now I have Intel Pentium 4 processor, Intel MainBoard, Intel Network card (good, no?  )
I edit my /etc/make.conf with this:
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/etc/make.conf:
CFLAGS="-march=pentium4 -Os -pipe -fomit-frame-pointer -ffast-math -mmmx -msse -msse2 -mfpu"
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It`s a better reinstall gentoo from scratch or I may do:
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emerge -aveDu world
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? I want optimized my gentoo for a speed (perfomance).
My /proc/cpuinfo
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/proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 1
model name : Intel(R) Pentium(R) 4 CPU 1.70GHz
stepping : 2
cpu MHz : 1695.183
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmovpat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
bogomips : 3268.60
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Can I add some flags into CFLAGS in make.conf? For better performance? Thanks. Please
Hopefully I don`t must reinstall my gentoo from Scratch. Or rather yes?
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caspar
Apprentice
Joined: 02 Mar 2003
Posts: 228
Location: 240 000 miles away from moon
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| Posted: Fri Dec 17, 2004 10:17 am Post subject: |
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Can you post your CFLAGS of the Athlon XP configuration? If they were optimized for athlon xp you must recompile all packages. Architecture specific flags do only run on this architecture as far as I know.
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zrebec
Tux's lil' helper
Joined: 07 Dec 2004
Posts: 129
Location: Bratislava / Slovakia
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| Posted: Fri Dec 17, 2004 10:34 am Post subject: |
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Sure. CFLAGS of Athlon-XP:
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CFLAGS="-march=athlon-xp -Os -pipe -fomit-frame-pointer -ffast-math -mmmx -msse -m3dnow"
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caspar
Apprentice
Joined: 02 Mar 2003
Posts: 228
Location: 240 000 miles away from moon
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| Posted: Fri Dec 17, 2004 10:51 am Post subject: |
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You could try to boot with the livecd and chroot-ing into your actual system then. If you can't use your system then you will need a fresh compilation.
One possible solution would be to compile everything for x686 with your old mainboard etc and then inserting the new one and hoping the best. If you can boot you could compile everything for your pentium IV.
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setagllib
n00b
Joined: 15 Dec 2004
Posts: 53
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| Posted: Fri Dec 17, 2004 11:01 am Post subject: |
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I don't mean to be rude, but when you use a -march= value, all of the relevant -mmmx, -msse, etc. flags are implied, and so is -mcpu/-mtune. You do NOT need to specify them by hand, it will not make a lick of a difference - if anything you're slowing gcc down by a few ns because it has to parse more arguments on every start!
If you want to list them all explicitly, at least remember that all of those chips have MMX2 and the Ath XP would probably have 3Dnow2 too. But I don't recommend listing them explicitly.
Sorry for all of that, I just hate seeing ricer CFLAGS, it's the part of the Gentoo-frequenting community I hate and stamping it out is a sort of goal for me. Gentoo, fast as it is, is all about convenience. If you really wanted insane performance you'd probably run DragonFly BSD or something.
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nephlim
n00b
Joined: 06 Aug 2004
Posts: 51
Location: Germany
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| Posted: Fri Dec 17, 2004 11:11 am Post subject: |
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| setagllib wrote: | | If you really wanted insane performance you'd probably run DragonFly BSD or something. |
If you would like to use it do it... 
Doesn't seem it wrong to you to push down Gentoo for another *NIX inside this forum? 
Best regards
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zrebec
Tux's lil' helper
Joined: 07 Dec 2004
Posts: 129
Location: Bratislava / Slovakia
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| Posted: Fri Dec 17, 2004 11:19 am Post subject: |
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Never mind ;o) I will be compiling new gentoo to the another disk and using current system yet. But have you please some good tips for better perfomannce? Thanks for every hint
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bakreule
Apprentice
Joined: 27 Aug 2003
Posts: 233
Location: Paris, France
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| Posted: Fri Dec 17, 2004 11:30 am Post subject: |
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| Quote: | | Doesn't seem it wrong to you to push down Gentoo for another *NIX inside this forum? |
Not at all. If there's something else that fits your needs, use it. Gentoo is popular because it fits the user profile of a lot of people, but it's not the *NIX for everyone. |
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