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Date: Mon, 2 Sep 2002 04:01:57 -0700 (PDT)
From: magudexter <magudexter@yahoo.com>
Subject: k6 or i686 optimization on AMD Athlon?
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Hello!

Every time I build a source I want to specify the
proper compiler parameters in order to max out the
performance. This is the case with make world.

I recently purchase a AMD XP processor belonging to
the k7 family. Even though the /etc/default/make.conf
mentions the k7 processor in CPUTYPE the cc compiler
know only k6 and i686(alias pentiumpro).

Every build using the make.conf with the CPUTYPE=k7
make actually a build with march=k6(which belongs to
i586 family). 
    I am not aware of the internals of these
processors but wouldn't it be wise to use i686 to the
AMD Duron/Athlon/TB/XP processors to gain more
performance then the k6 build?

P.S. And one more question - does FreeBSD supports the
non-exec stack available on the i386 family (*any*
detail on these is appreciated)?

Thanks,
   Costin

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