From owner-freebsd-questions Mon Sep 2 6:51:36 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 3122137B400 for ; Mon, 2 Sep 2002 06:51:32 -0700 (PDT) Received: from mail.liwing.de (mail.liwing.de [213.70.188.162]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1444C43E42 for ; Mon, 2 Sep 2002 06:51:31 -0700 (PDT) (envelope-from rehsack@liwing.de) Received: (qmail 67164 invoked from network); 2 Sep 2002 13:51:29 -0000 Received: from stingray.liwing.de (HELO liwing.de) ([213.70.188.164]) (envelope-sender ) by mail.liwing.de (qmail-ldap-1.03) with SMTP for ; 2 Sep 2002 13:51:29 -0000 Message-ID: <3D736CC7.306B928@liwing.de> Date: Mon, 02 Sep 2002 15:51:03 +0200 From: Jens Rehsack Organization: LiWing IT-Services X-Mailer: Mozilla 4.8 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: magudexter Cc: Gary Jennejohn , freebsd-questions@freebsd.org Subject: Re: k6 or i686 optimization on AMD Athlon? References: <20020902125705.39456.qmail@web20310.mail.yahoo.com> Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit 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 magudexter wrote: > > I will probably use the i686 as you suggested. I > wanted to know if the k6 support has more/better > features than the i686 - I guess not. > > Btw do you know anything about the non exec feature on > the i386 in FreeBSD - meaning that the stack no longer > executes code; this is a great increase in security as > it is the usual method for buffer overflows? Or do you > know where to ask/look for it? I have checked the assembly output using gcc 9.95.2, but on a linux system. This compiler supports -march=k6-2, too. Code quality (badest --> best) i586 k6 i686 k6-2 k7 So if you must deside between k6 and i686 I'd recommend i686 for code quality. But I tried both on a freebsd system with a k6-2 and get the subjective feeling that k6 is little faster. So I think it depends on what you wanna do with it. Jens > Thanks for the advices! > > --- Gary Jennejohn wrote: > > magudexter writes: > > > Okay, but when will the gcc3.21 make it into the > > > stable release? > > > > Dunno, but you can always install the port. > > Considering that 4.7 > > is due out soon I don't think the release > > engineering team is > > going to import a new gcc. There was enough > > controversy among > > the -current crowd when gcc-3.2 was imported. > > > > > And until then, for the gcc-2.95.3 > > > (the one found in the stable version) what setting > > you > > > know works better: > > > i686 or k6? > > > > > > > I used i686. The Athlon is more an i688 than an > > i586. > > > > --- > > Gary Jennejohn / garyj@jennejohn.org gj@freebsd.org > > gj@denx.de > > > > __________________________________________________ > Do You Yahoo!? > Yahoo! Finance - Get real-time stock quotes > http://finance.yahoo.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message -- L i W W W i Jens Rehsack L W W W L i W W W W i nnn gggg LiWing IT-Services L i W W W W i n n g g LLLL i W W i n n g g Friesenstraße 2 gggg 06112 Halle g g g Tel.: +49 - 3 45 - 5 17 05 91 ggg e-Mail: Fax: +49 - 3 45 - 5 17 05 92 http://www.liwing.de/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message