Hello

I'm planning so install Gentoo on an IBM Tkinkpad T41p. This Notebook has a
Pentium M Processor. I need most stable but fast CFLAGS for this processor.
Can anyone help me?

Bye
Olli

Oliver Bohlen wrote:

> I'm planning so install Gentoo on an IBM Tkinkpad T41p. This Notebook has
> a Pentium M Processor. I need most stable but fast CFLAGS for this
> processor. Can anyone help me?

Look at my CFLAGS in thread 'CFLAGS -which -Ox??'

--
Krzysiek 'Nelchael' Pawlik RLU #322999 krzysiek.pawlik@people.pl
gentoo base system kernel 2.6.5 GPG Key ID: 0x7E226904
http://fatcat.ftj.agh.edu.pl/~nelchael/ http://www.ps.nq.pl/
"Experience is what you get when you don't get what you want."

Oliver Bohlen wrote:
> Hello
>
> I'm planning so install Gentoo on an IBM Tkinkpad T41p. This Notebook has a
> Pentium M Processor. I need most stable but fast CFLAGS for this processor.
> Can anyone help me?
>
> Bye
> Olli

I'm err, sure this has been done before, u sure u tried google group search?

http://groups.google.com/groups?num=...gs&btnG=Search
http://groups.google.com/groups?hl=e...tn G%3DSearch

--
Ben M.

Oliver Bohlen wrote:

> Hello
>
> I'm planning so install Gentoo on an IBM Tkinkpad T41p. This Notebook has a
> Pentium M Processor. I need most stable but fast CFLAGS for this processor.
> Can anyone help me?
>
> Bye
> Olli

nice laptop.

after my discussion with Krzysiek in another thread, i think i finally
understand what the right optimization would be.

CFLAGS="-O3 -march=pentium4 -mfpmath=sse,387 -malign-double -mmmx -msse
-msse2 -fomit-frame-pointer -funroll-loops"

Krzysiek, please correct or confirm!

Charles Banas polluted the internet with:

> after my discussion with Krzysiek in another thread, i think i finally
> understand what the right optimization would be.
>
> CFLAGS="-O3 -march=pentium4 -mfpmath=sse,387 -malign-double -mmmx -msse
> -msse2 -fomit-frame-pointer -funroll-loops"


is the "pentium m" we are talking about here the "pentium 4m"?
or are those two different cpus ?


--
.......cheers................
....phil reither.............

Charles Banas wrote:

>> I'm planning so install Gentoo on an IBM Tkinkpad T41p. This Notebook has
>> a Pentium M Processor. I need most stable but fast CFLAGS for this
>> processor. Can anyone help me?
>
> nice laptop.
>
> after my discussion with Krzysiek in another thread, i think i finally
> understand what the right optimization would be.
>
> CFLAGS="-O3 -march=pentium4 -mfpmath=sse,387 -malign-double -mmmx -msse
> -msse2 -fomit-frame-pointer -funroll-loops"
>
> Krzysiek, please correct or confirm!



I have a P4M laptop too

Don't use -O3 for production system. Why? O3 doesn't give as much increase
in speed if copared with O2, but makes the compilation a lot longer. It
simply isn't worth it. Besides using 03 uses so called 'not-safe'
optimizations - they can render your system unstable (rare, but possible).
O2 applies (almost) all safe optimizations, and thus it's the best choice
for production systems.

BTW.
Charles add the '-pipe' to CFLAGS - it will decrease compilation time
(especially with huge C++ based projects (eg. OOo, KDE))

--
Krzysiek 'Nelchael' Pawlik RLU #322999 krzysiek.pawlik@people.pl
gentoo base system kernel 2.6.5 GPG Key ID: 0x7E226904
http://fatcat.ftj.agh.edu.pl/~nelchael/ http://www.ps.nq.pl/
"Experience is what you get when you don't get what you want."

phil reither wrote:

> is the "pentium m" we are talking about here the "pentium 4m"?
> or are those two different cpus ?

For both CPUs same flags apply.

--
Krzysiek 'Nelchael' Pawlik RLU #322999 krzysiek.pawlik@people.pl
gentoo base system kernel 2.6.5 GPG Key ID: 0x7E226904
http://fatcat.ftj.agh.edu.pl/~nelchael/ http://www.ps.nq.pl/
"Experience is what you get when you don't get what you want."

Charles Banas wrote:

> after my discussion with Krzysiek in another thread, i think i finally
> understand what the right optimization would be.
>
> CFLAGS="-O3 -march=pentium4 -mfpmath=sse,387 -malign-double -mmmx -msse
> -msse2 -fomit-frame-pointer -funroll-loops"
>
> Krzysiek, please correct or confirm!

The Pentium M is actually based on the Pentium 3, therefore I would not not
recommend to use "-march=pentium4". However the "Pentium 4-M" is an almost
unmodified Pentium 4 (at least so I've been told). Despite their similar
names, "Pentium M" and "Pentium 4-M" are very different CPUs. Don't confuse
them!

I'm running Gentoo on a Pentium M notebook (Maxdata Pro 8000X). These CFLAGS
seem to work without problems:
CFLAGS="-O2 -march=pentium3 -mmmx -msse -funroll-loops -fomit-frame-pointer
-fforce-addr -frename-registers -fprefetch-loop-arrays -falign-functions=64
-pipe"

HAND
Bernhard

Krzysiek Pawlik wrote:
>
> I have a P4M laptop too
>
then your advice would be the most helpful.

> Don't use -O3 for production system. Why? O3 doesn't give as much increase
> in speed if copared with O2, but makes the compilation a lot longer. It
> simply isn't worth it. Besides using 03 uses so called 'not-safe'
> optimizations - they can render your system unstable (rare, but possible).
> O2 applies (almost) all safe optimizations, and thus it's the best choice
> for production systems.
>
which i knew, but i didn't think the three flags -O3 introduce made such
negative changes (in addition to the minor performance gain.

> BTW.
> Charles add the '-pipe' to CFLAGS - it will decrease compilation time
> (especially with huge C++ based projects (eg. OOo, KDE))
>
i realize that, i just forgot it. i normally have -pipe in there, i
just forgot to add it this time.

Bernhard Stiftner wrote:

>
> The Pentium M is actually based on the Pentium 3, therefore I would not not
> recommend to use "-march=pentium4". However the "Pentium 4-M" is an almost
> unmodified Pentium 4 (at least so I've been told). Despite their similar
> names, "Pentium M" and "Pentium 4-M" are very different CPUs. Don't confuse
> them!
>
i actually checked the specs on the IBM laptop in question and saw it
was a recent model with pentium-4 specs. although, i did think the
speeds were a bit low for a Pentium 4. in any case, i deduced form the
specs that it was a Pentium 4. am i wrong?