On Sun, 2004-02-01 at 18:07, Dennis Freise wrote: > On Sun, 1 Feb 2004 18:36:25 -0500 > Robert G. Waycott <[EMAIL PROTECTED]> wrote: > > > Okay, okay ... well, like I said ... I run a dual-933 rig right now. I've been > > doing SMP for quite some time in Gentoo. Pretty proficient with it on a P3 > > platform. Just curious how things might be different with P4 Xeons. However, > > since the box here is built with -march=pentium3, docs say that will only work > > with PentiumIII system. Thus, the docs seem to intimate that Pentium4s will > > not work. Though, I can see how this could not necessarily be the case. But > > why wouldn't I want to change over to -march=pentium4 ?? Will this break > > things or something? Won't the programs be a bit better optimized using > > pentium4 for arch? > > >From '/etc/make.conf': > > # PENTIUM4 will generate invalid SSE2 instructions; use 'pentium3' instead. # > > Also, the performance gain when using pentium4 instead of pentium3 is minimal.
I need to disagree. I have a Toshiba Satellite Pro 6100 (Pentium 4 1.8
Ghz), and originally I installed Gentoo with pentium3 (because of the
warning in make.conf). Months later, reading the forums and the mailing
list, several people commented that the pentium4 flag was not dangerous
at all. So I recompiled everything again using pentium4.
My system has no problems since then and, more importantly, it feels
much more faster and based in timings to compile big packages, it's
actually faster (so is not only in my head; genlop -t shows significant
improvement when compiling).
Canek
--
Courtship to marriage, as a very witty prologue to a very dull play.
-- William Congreve
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