From owner-freebsd-current Mon Apr 5 22:19:34 1999 Delivered-To: freebsd-current@freebsd.org Received: from zippy.dyn.ml.org (sf3-74.ppp.wenet.net [206.15.84.74]) by hub.freebsd.org (Postfix) with ESMTP id 3967114C12 for ; Mon, 5 Apr 1999 22:19:31 -0700 (PDT) (envelope-from garbanzo@hooked.net) Received: from localhost (garbanzo@localhost [127.0.0.1]) by zippy.dyn.ml.org (8.9.3/8.9.1) with ESMTP id WAA67952; Mon, 5 Apr 1999 22:17:36 -0700 (PDT) (envelope-from garbanzo@hooked.net) Date: Mon, 5 Apr 1999 22:17:36 -0700 (PDT) From: Alex Zepeda To: Matthew Dillon Cc: current@FreeBSD.ORG Subject: Re: EGCS optimizations In-Reply-To: <199904060457.VAA01999@apollo.backplane.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, 5 Apr 1999, Matthew Dillon wrote: > My conclusion: Don't bother with -mpentiumpro or -march=pentiumpro. > Not only do they not result in better performance, -march=pentiumpro > will not run on a K6-2. I dunno about a K6-3. -m does not change > the assembly output at all. -march= does change the assembly output, > but does not appear to result in any noticeable improvement in performance > over not using -m at all. Totally informally, I replaced libc (compiled with -O2) with one compiled with -mpentiumpro and -O6, and compiling kdebase seemed to run a bit slower (GNU make took longer to traverse directories and egcs took a bit longer to run). > Which leads me to believe that using -Os might be beneficial. Have you tried anything beyond -O2? - alex To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message