From owner-freebsd-questions Thu Oct 24 8: 4:40 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EB67E37B401 for ; Thu, 24 Oct 2002 08:04:38 -0700 (PDT) Received: from albatross.prod.itd.earthlink.net (albatross.mail.pas.earthlink.net [207.217.120.120]) by mx1.FreeBSD.org (Postfix) with ESMTP id A3AAE43E6E for ; Thu, 24 Oct 2002 08:04:38 -0700 (PDT) (envelope-from walterk1@earthlink.net) Received: from user-0cal9lv.cable.mindspring.com ([24.170.166.191] helo=earthlink.net) by albatross.prod.itd.earthlink.net with esmtp (Exim 3.33 #1) id 184jXJ-0002AC-00 for freebsd-questions@FreeBSD.org; Thu, 24 Oct 2002 08:04:38 -0700 Message-ID: <3DB80C07.9BDDFE63@earthlink.net> Date: Thu, 24 Oct 2002 10:04:39 -0500 From: Walter X-Mailer: Mozilla 4.77C-CCK-MCD {C-UDP; EBM-APPLE} (Macintosh; U; PPC) X-Accept-Language: en MIME-Version: 1.0 To: "freebsd-questions@FreeBSD.org" Subject: Re: kernel optimization References: <3DB80AF6.4559ED25@earthlink.net> Content-Type: text/plain; charset=us-ascii; x-mac-type="54455854"; x-mac-creator="4D4F5353" Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Never mind... I just found the explanation further down (from the "machine i386" line in LINT. Sorry. # CPU OPTIONS # # You must specify at least one CPU (the one you intend to run on); # deleting the specification for CPUs you don't need to use may make # parts of the system run faster. This is especially true removing # I386_CPU. # cpu I386_CPU cpu I486_CPU cpu I586_CPU # aka Pentium(tm) cpu I686_CPU # aka Pentium Pro(tm) Walter wrote: > I haven't yet found notes on optimizing the kernel by > telling the compiler I have a Pentium rather than just > a 386-compatible processor. I presume these lines > in the kernel configuration file deal with this: > > machine i386 > cpu I386_CPU > cpu I486_CPU > cpu I586_CPU > cpu I686_CPU > > Q: Do I comment out the "I386_CPU" and "I486_CPU" > lines to optimize for a Pentium, (& if not, how do I,) and > Q: Does it make a significant difference? > > TIA. > > Walter > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message