Howto: Gentoo Ricing 183%

Lechium · Apprentice Joined: 04 Apr 2005 Posts: 244

Actually the benchmark was done from my very normal and basic gentoo box, which had F@H client running at the time. It is a Pentium D, with a very very lightweight installation (sans kde lol), so guess that contributed.
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Omega21 · Posted: Sun Dec 04, 2005 4:36 am Post subject:

Thats awesome!
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aidanjt · Posted: Sat Dec 10, 2005 4:58 am Post subject:

I discovered that if you follow this ricers howto and bootstrap during a full moon my 3.2Ghz P4 o/ced to 5.8 liquid nitrogen cooled magically sprang up an extra 200Mhz clock making it 6Ghz!!.. Imagine what it would do if I did it during a solar eclipse!?!? the hidden CFLAG --fomfgwft-opts also works wonders.

thedarave · n00b Joined: 21 Jul 2004 Posts: 19

I heard that if you patch "flame_decal.h" to the vanilla kernel, it makes it go faster.

Now lets see who else has seen that Futurama episode...

-Steve-
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silverpig · Posted: Wed Feb 08, 2006 7:30 pm Post subject:

-omg-optimized

That had me in stitches.

But where are

-mtype-r
-mNOS

or maybe more appropriately for a computer

-mLN2

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Tamsco · Guru Joined: 04 Aug 2004 Posts: 313 Location: dmse.mit.edu

XenoTerraCide · Veteran Joined: 18 Jan 2004 Posts: 1418 Location: MI, USA

make sure you're using the 2.7 kernel series. whatever you do make sure the second number of the kernel is odd.
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XenoTerraCide · Veteran Joined: 18 Jan 2004 Posts: 1418 Location: MI, USA

also don't forget to have them include flags there processor doesn't support. like

mark_alec · Posted: Wed Mar 01, 2006 10:06 am Post subject:

XenoTerraCide · Veteran Joined: 18 Jan 2004 Posts: 1418 Location: MI, USA

damn must have missed that one... yeah I see it now right next to -omg-mmxadv and -m4dnow (used for rendering things in 4 "spatial dimensions") enabling...
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amne · Posted: Wed Mar 01, 2006 10:23 am Post subject:

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

Just a not-joking, serious note: I'm using an ~x86 system with a sempron 3100+ rev.E
machine.Since seems that I'm forced to use march=athlon-xp here (cause march=k8 is for ~AMD64 only),
I decided to add the cflags "-msse -msse2 -msse3", however, speed-up is very limited,
even for blender rendering(152 sec becomed 148) I think cause:
or 1) gcc isn't really good with sse2
or 2) sse2 needs optimized code to works
or 3) sse2 just doesn't give much performances (but strangely, sse2 versions of blender
for win32 is reported to gain more than 30% speed... which makes me think 1 or 2 are the correct answer...)
or 4) sse2 is just not supported for 32 bits enviroments (+athlon-xp)?
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Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

I can answer myself, right answer was 1 for gcc 3.4.x ,with a note:

even with -O3 -msse2 -msse3 -mfpmath=sse -mfpmath=sse,387 thing didn't changed too much, my renders becamed
only 6% faster than with a plain -O2.... (143 seconds)

answer was gcc 3.4 isn't handling well the sse-sse2 optimizations for fpmath(at least not as intel compiler does),
autovectorization is in gcc 4.1,so with gcc 4.1 it should perform more (but I can't thell how much).

EDIT: I did a test. The same scene in blender took me 2:32 to render in a blender built with gcc-3.5-r1 and just "-O2",
the same scene took me 1:55 to render in a blender built with gcc-4.1 and "-O3 -ftree-vectorize -msse -msse2 -ftree-vecorizer-verbose=1 -mfpmath=sse".
20% less time is good for 3D apps,as it can save hours in batch renderings, so IMHO with gcc-4.1.0 the 3D apps will be a little
exception to the gentoo ricing....
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aidanjt · Posted: Tue Mar 07, 2006 12:01 am Post subject:

Well, you can't beat hand assembled SIMD code for the areas that are truely important. 6% isn't too bad.

Fitzzy · n00b Joined: 07 Nov 2005 Posts: 17 Location: Fitzville

And to all you ricers out there with slow machines, here is a nice ricer tip!:

Always emerge packages on faster machines because those binaries will also be faster when run on slower machines!

red-wolf76 · Posted: Fri Apr 14, 2006 9:02 am Post subject:

I've another sure-fire suggestion for further optimilazing your Gentoo-experience. Paint your computer case red, wear only red clothes and change your console colour setting to only output red text. As everyone worth his salt knows, «Red onez go fasta!»...

Umm... I better not post my emerge --info here :lol:

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SirYes · Posted: Sat Apr 15, 2006 9:56 pm Post subject:

Sure the quite often forgotten prelinking makes wonders! Just remember to add USE="pic" flag and prelink all possible applications with all libraries they happen to use. Then find the preload/prefetch patches or Gentoo baselayout and you're golden.

Only that and the need for 4GB of RAM (or more...) because all that applications and libraries would be loaded upon boot into the memory in One Giant Swoop... But then, you'll be much rejoiced

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red-wolf76 · Posted: Sun Apr 16, 2006 9:56 am Post subject:

reub2000 · Guru Joined: 31 Jan 2004 Posts: 364

Varean · Posted: Tue Apr 18, 2006 3:57 am Post subject:

Someone fire up a 200 mHz CPU machine w/ 18 mB of RAM and maybe 2 gigs of HD space(I know people out there Gentoo these), and seriosuly try this out. Heck, who needs overcl0cking with this stuff!?

Brilliant piece!
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tane_stelzer · Posted: Sun Jul 02, 2006 5:17 am Post subject:

OMG that is the most funniest guide i have ever read. I love it. I will try your options sometime on my old computer.....
Tane
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Monkeh · Veteran Joined: 06 Aug 2005 Posts: 1656 Location: England

zxy · Posted: Mon Jul 03, 2006 1:39 pm Post subject:

NEW: try F1-sources-3.0.0-pre1.

Here is the link www.f1-sources.org/download/testing/unstable/alpha/f1-sources-just-out-git01.ebuild