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From: Pieter de Goeje <pieter@degoeje.nl>
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Date: Wed, 10 Jan 2007 09:13:00 +0100
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Cc: Oliver Fromme <olli@lurza.secnetix.de>
Subject: Re: /etc/make.conf CPUTYPE question (nacona vs. pentium4)
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On Tuesday 09 January 2007 10:46, Oliver Fromme wrote:
> Hi,
>
> I'm trying to write an appropriate CPUTYPE entry for
> /etc/make.conf for the following machine:
>
> CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (2799.95-MHz 686-class CPU)
>   Origin =3D "GenuineIntel"  Id =3D 0xf41  Stepping =3D 1
>   Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,
>                       SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,
>                       DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>   Features2=3D0x441d<SSE3,RSVD2,MON,DS_CPL,CNTX-ID,<b14>>
>   Logical CPUs per core: 2
>
> I've read the appropriate sections in the make.conf(5)
> manpage, /usr/share/examples/etc/make.conf and even
> /usr/share/mk/bsd.cpu.mk, but they don't really help.
>
> So far I've been using "CPUTYPE=3Dpentium4", but I wonder
> if "nocona" would be better, however I'm not sure if my
> CPU above qualifies as a nocona one.  I think the main
> difference is that nocona supports SSE3, and SSE3 is
> indeed listed in the CPU features above, so ...

=46rom what I found on the Internet it seems that "Nocona" is the name of t=
he=20
first Xeon CPU that supports long mode (x86-64). Your CPU definately doesn'=
t=20
support long mode, so nocona isn't "right". (S)SSE3 adds only a few=20
instructions but they are really useful (in my opinion).

GCC(1) suggests:
           prescott
               Improved version of Intel Pentium4 CPU with MMX, SSE, SSE2 a=
nd
               SSE3 instruction set support.

Cheers,
Pieter