From owner-freebsd-stable Wed Feb 13 21:28:19 2002 Delivered-To: freebsd-stable@freebsd.org Received: from smtp.bmi.net (smtp.bmi.net [204.57.191.31]) by hub.freebsd.org (Postfix) with ESMTP id 58BE837B402 for ; Wed, 13 Feb 2002 21:28:16 -0800 (PST) Received: from johncoop.MSHOME (drumheller-router.bmi.net [206.63.201.3] (may be forged)) by smtp.bmi.net (Pro-8.9.3/Pro-8.9.3) with ESMTP id VAA25369; Wed, 13 Feb 2002 21:27:39 -0800 Date: Wed, 13 Feb 2002 21:27:38 -0800 From: John Merryweather Cooper To: Kris Kennaway Cc: Roman Shterenzon , freebsd-stable@freebsd.org Subject: Re: src/share/mk/bsd.cpu.mk Message-ID: <20020213212738.A82456@johncoop.MSHOME> References: <20020214011555.F33346-200000@alchemy.oven.org> <20020213210855.A5744@xor.obsecurity.org> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit In-Reply-To: <20020213210855.A5744@xor.obsecurity.org>; from kris@obsecurity.org on Wed, Feb 13, 2002 at 21:08:55 -0800 X-Mailer: Balsa 1.3.1 Lines: 31 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Since the Athlon/Duron have CMOV and the K6 does not, isn't it practically a wash? Whatever, scheduling benefits there might be for using K6 scheduling may be lost by not managing delay slots as well (since the pentiumpro has CMOV). Of course, this depends on what gcc 2.95.x actually does in the two cases . . . On 2002.02.13 21:08 Kris Kennaway wrote: > On Thu, Feb 14, 2002 at 01:20:27AM +0200, Roman Shterenzon wrote: > > > . if ${CPUTYPE} == "k7" > > -_CPUCFLAGS = -march=k6 # gcc doesn't support athlon yet, but > it will > > +_CPUCFLAGS = -march=pentiumpro # gcc doesn't support athlon > yet, but it will > > When I wrote this I was informed that the athlon benefits more from k6 > optimizations than pentiumpro. > > Kris > -- _ | |V| / ' || MacroHard -- \ \_| | | \_, || the perfection of form over | ----------------------------------|| substance, marketing over | Web: http://www.borgsdemons.com || performance, and greed over | AIM: johnmcooper || design . . . | =====================================================================/ Public Key: http://www.borgsdemons.com/Personal/pgpkey.asc | =====================================================================\ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message