CPUTYPE

[Roland Smith]

On Wed, May 23, 2007 at 05:50:55PM +0300, Stefan Lambrev wrote:
>  Hi list,
> 
>  From what I read the right CPUTYPE for freebsd/amd64 and
> 
>  CPU: Intel(R) Core(TM)2 CPU         T7200  @ 2.00GHz (1995.02-MHz K8-class 
>  CPU)
>   Origin = "GenuineIntel"  Id = 0x6f6  Stepping = 6
>   
>  Features=0xbfebfbff<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=0xe3bd<SSE3,RSVD2,MON,DS_CPL,VMX,EST,TM2,<b9>,CX16,XTPR,<b15>>
>   AMD Features=0x20100800<SYSCALL,NX,LM>
>   AMD Features2=0x1<LAHF>
> 
>  I should use CPUTYPE?=nocona , right?
>  I just want to be sure :)

Have a look at /usr/src/share/mk/bsd.cpu.mk, especially the bit that
says "Set up the list of CPU features based on the CPU type":

. elif ${MACHINE_ARCH} == "amd64"
.  if ${CPUTYPE} == "opteron" || ${CPUTYPE} == "athlon64" || ${CPUTYPE} == "k8"
MACHINE_CPU = k8 3dnow
.  elif ${CPUTYPE} == "nocona"
MACHINE_CPU = sse3
.  endif
MACHINE_CPU += amd64 sse2 sse mmx

The only extra featuree for "nocona" seems to be the SSE3
instructions. Since your 'Features2' lists SSE3, it is correct.
 
>  Also is nocona right for all Intel x86_64 processors (if I run 
>  freebsd/amd64)
>  like xeon, new pentium D, core (2) duo and etc?

See http://en.wikipedia.org/wiki/SSE3

Roland
-- 
R.F.Smith                                   http://www.xs4all.nl/~rsmith/
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