Pentium M and ISO of Gentoo

xavan · n00b Joined: 20 Jun 2003 Posts: 50

What ISO have I to download for my centrino Laptop?
pentium 3, 4 or x86?

matteo* · Posted: Thu Nov 27, 2003 12:54 pm Post subject:

the iso for pentium 4..
it's written here: http://store.gentoo.org/index.php?item=17&action=viewitem

Wildhoney · n00b Joined: 08 Mar 2003 Posts: 66 Location: Germany

i say the iso for pentium 3!
http://store.gentoo.org/index.php?item=16&action=viewitem

compiled my hole system for p3, runs like a charm.
have a T40p IBM Thinkpad.

hulk2nd · Posted: Thu Nov 27, 2003 2:06 pm Post subject:

compiled my whole system for p4, runs like a charm.

i think there is no 'perfect' optimization for the pentium-m yet. someone posted a benchmark the average between penium3 and pentium4 optimization is the same. so doesn't matter what you chose atm.

greets,
hulk

Wildhoney · n00b Joined: 08 Mar 2003 Posts: 66 Location: Germany

p3 optimisation ist better, trust me or you will die a horrible death. Death comes often with a red hat, so watch out!

scnr,

Wildhoney

xavan · n00b Joined: 20 Jun 2003 Posts: 50

Well everybody has is own opinion.
When will the next version of gentoo comes?(with the 2.6kernel)?
Maybe with pentium M optimization

thundersteele · Apprentice Joined: 30 Aug 2003 Posts: 219

gentoo already has 2.6 kernel. This only depends on which one you choose when installing. You can change to 2.6 kernel any day.

Optimization flags have mainly to do with gcc. Don't know if there are efforts to make an

Wildhoney · n00b Joined: 08 Mar 2003 Posts: 66 Location: Germany

xavan · n00b Joined: 20 Jun 2003 Posts: 50

Which kernel do you prefer for a laptop?

matteo* · Posted: Fri Nov 28, 2003 4:11 pm Post subject:

thundersteele · Apprentice Joined: 30 Aug 2003 Posts: 219

me too. currently test10. Has all in, so you don't need special patchsets like AC-sources etc.

feffi · Posted: Sat Nov 29, 2003 7:42 pm Post subject: OK, pals

Hi dudes,

I only can recommend you a pentium III optimization. This has several reasons:

- Pentium-M is a redesign of a Pentium III (not a Pentium4)
- Gentoo systems (including my old) emerged with pentium 4 encounter situations from strange problems with portage or system-files to complete unrecoverable crashes
- Pentium-M has no HyperThreading, so all optimizations in this direction will be useless

If you don't trust me, search this forum and gcc forums and take your own picture.

BTW: If you need some hints on optimizing towards a Pentium-M look at my thread here: Acer 803 LCi Notebook Config (maybe a sticky?)
or THE thread on CFLAGS here
_________________
have fun

feffi

/(bb|[^b]{2})/ that is the Question!

Gentoo-Wiki: Acer Travelmate 803 LCi manual

xavan · n00b Joined: 20 Jun 2003 Posts: 50

OK thx a lot

scrllock · Tux's lil' helper Joined: 14 Oct 2002 Posts: 102

Mambo · n00b Joined: 18 Oct 2003 Posts: 12

should be able to use pentium3 and just specify sse2

scrllock · Tux's lil' helper Joined: 14 Oct 2002 Posts: 102

but will that imply all of the other pentium-4 optimizations? no reason to not optimize for the processor you have, that's the point of gentoo.

thundersteele · Apprentice Joined: 30 Aug 2003 Posts: 219

gurke · Apprentice Joined: 10 Jul 2003 Posts: 260

the problems with arch pentium4 have nothing to do with the pentium-m, but with some bugs in gcc-3.2 and lower (sse code). they are definitly fixed in 3.3, but it seems to work with 3.2 ok, by now (the latest GRP is compiled with arch pentium4). i have mine running with the GRP for 2 month now (and upgraded a lot, too), and it runs without any problems. the pentium-m is not a "higher frequency" pentium3 (or "lower frequency" pentium4) like some people say, but a new chip-design, that supports all the command extensions of the pentium 4, so it should work fine with pentium4 settings.

LLoydBates · Posted: Mon Dec 08, 2003 8:07 am Post subject:

USE="mmx mmx2 sse sse2 [..]"

CFLAGS"-march=pentium3 -mcpu=pentium4 [..]"

i'm running my Centrino with this .. compiled from stage 1
works wonderfull

TenPin · Guru Joined: 26 Aug 2002 Posts: 500 Location: Kansas City

http://www.ussg.iu.edu/hypermail/linux/kernel/0310.0/0398.html

Adamal · Posted: Sun Jan 18, 2004 8:46 am Post subject:

The pentium M is neither a P3 or a P4. It is the first processor that was designed from the start with mobility in mind. You could say that it is a cross between the best features of the pentium 3 and 4. I don't think you could go wrong with either optimizations, but I believe that the P4 optimization would be better for this processor.

jcmorris · Apprentice Joined: 11 Jun 2003 Posts: 174

If you do a cat /proc/cpuinfo, you'll notice that it is in the P6 family. It is based on a modified P3 core, with some Pentium 4 extensions, such as SSE2 and a faster bus. Doing a heavy googling, and after reading a bit of the Intel Optimization guide, and reading discussions between developers, it seems to me that it is best to optimize for either a pentium 3 or i686 (I don't think you'll notice much of a difference). Here are my CFLAGS:

-march=pentium3 -msse2

I think those would be the best processor optimizations. Oh, and definitely optimize with -O3 and possibly -funroll-loops. The P-M has a 1 MB L2 cache, use it!

jcm
_________________
Desktop:
Athlon64 3000+ (Socket 939 Venice)
Asus A8N-SLI
1GB Dual-Channel DDR 3200
NVidia Geforce 6800 256MB

Laptop:
IBM R40
Pentium M 1.4 GHz
256 MB RAM

jcmorris · Apprentice Joined: 11 Jun 2003 Posts: 174

Oh, and one more thing guys, make sure you compile the kernel for a Pentium 4, because I'm not sure, but I think it needs this in order for the kernel to support SSE2.

jcm
_________________
Desktop:
Athlon64 3000+ (Socket 939 Venice)
Asus A8N-SLI
1GB Dual-Channel DDR 3200
NVidia Geforce 6800 256MB

Laptop:
IBM R40
Pentium M 1.4 GHz
256 MB RAM

jcmorris · Apprentice Joined: 11 Jun 2003 Posts: 174