From owner-freebsd-hackers Sat May 11 21:52:08 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id VAA22417 for hackers-outgoing; Sat, 11 May 1996 21:52:08 -0700 (PDT) Received: from mail.barrnet.net (mail.barrnet.net [131.119.246.7]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id VAA22283 for ; Sat, 11 May 1996 21:51:56 -0700 (PDT) Received: from neon.Glock.COM (neon.glock.com [198.82.228.159]) by mail.barrnet.net (8.7.5/MAIL-RELAY-LEN) with ESMTP id VAA08506 for ; Sat, 11 May 1996 21:51:25 -0700 (PDT) Received: (from mmead@localhost) by neon.Glock.COM (8.7.5/8.7.3) id AAA00407; Sun, 12 May 1996 00:50:48 -0400 (EDT) From: "matthew c. mead" Message-Id: <199605120450.AAA00407@neon.Glock.COM> Subject: Re: 6x86 120+ To: phk@critter.tfs.com (Poul-Henning Kamp) Date: Sun, 12 May 1996 00:50:48 -0400 (EDT) Cc: hackers@freebsd.org In-Reply-To: <5891.831836840@critter.tfs.com> from "Poul-Henning Kamp" at May 11, 96 05:47:20 pm X-Mailer: ELM [version 2.4 PL24 ME8a] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Poul-Henning Kamp writes: > > I just got one of these the other day and installed it. I've > > read before that they accept the full pentium instruction set. > > For all but a few things, it's a fair amount faster than my > > P90(@100). I did notice that these applications that seem slower > > are built with pgcc pentium optimization. Does anyone know if I > > need to build with -m486 to get better performance out of this > > chip, or should I stick with -mpentium? Thanks! > >From what I have heard so far you should only use -mpentium for the P5. > Most of the newer chips run slower with the pentium opts. because the > attempted dual parallel sequences of instructions defeat the lookahead > of the logic in charge of the "RISCification". Oops. I totally missed this in my skim earlier - the way you positioned it, I ended up looking only at the following. :-) I'll try building things without pgcc. > Can we have a number for the FreeBSD-stones ? > cd /usr/src > rm -rf /usr/obj/* > time make world Just about to sup things up to tonight's current and start. However, I realized that I need a little more information to give you a fair number. Mount filesystem with -o async? Use CC="cc -pipe"? I have all of /usr/src and /usr/obj going to a JAZ drive disk, which is slower than my system disks. Any instructions you wanna give me to make the number fairer will help. -matt -- Matthew C. Mead mmead@Glock.COM http://www.Glock.COM/~mmead/