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To: Kris Kennaway <kris@obsecurity.org>
Cc: Lowell Gilbert <freebsd-questions-local@be-well.no-ip.com>,
	Walter <walterk1@earthlink.net>,
	"freebsd-questions@FreeBSD.org" <freebsd-questions@FreeBSD.ORG>
Subject: Re: kernel optimization
References: <3DB80AF6.4559ED25@earthlink.net> <44bs5j24kb.fsf@be-well.ilk.org>
	<20021024213548.GA54124@xor.obsecurity.org>
From: James McNaughton <jtm63@enteract.com>
Date: 04 Nov 2002 22:15:18 -0600
In-Reply-To: <20021024213548.GA54124@xor.obsecurity.org>
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Kris Kennaway <kris@obsecurity.org> writes:

> On Thu, Oct 24, 2002 at 12:18:44PM -0400, Lowell Gilbert wrote:
> > Walter <walterk1@earthlink.net> writes:
> > 
> > > Q: Do I comment out the "I386_CPU" and "I486_CPU"
> > > lines to optimize for a Pentium, (& if not, how do I,) and
> > 
> > Yes.
> > 
> > > Q: Does it make a significant difference?
> > 
> > It will make the kernel a bit smaller, but it won't speed anything up.
> 
> It will speed up some kernel code, because it will use different
> (non-386 compatible) asm code for things like bzero.
> 
> Kris

Do the options

CPUTYPE=i586/mmx
CFLAGS= -O -pipe
NOPROFILE=true

in /etc/make.conf do anything for the kernel, or do they just affect
userland?

Just wondering...


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