From owner-freebsd-amd64@FreeBSD.ORG Sun Oct 9 05:34:29 2005 Return-Path: X-Original-To: freebsd-amd64@freebsd.org Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6ED9616A41F for ; Sun, 9 Oct 2005 05:34:29 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2539243D46 for ; Sun, 9 Oct 2005 05:34:29 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (CPE0050040655c8-CM00111ae02aac.cpe.net.cable.rogers.com [70.30.70.180]) by elvis.mu.org (Postfix) with ESMTP id 0C27D1A3C1B; Sat, 8 Oct 2005 22:34:29 -0700 (PDT) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id DBF50511FE; Sun, 9 Oct 2005 01:10:34 -0400 (EDT) Date: Sun, 9 Oct 2005 01:10:34 -0400 From: Kris Kennaway To: ray@redshift.com Message-ID: <20051009051034.GB93028@xor.obsecurity.org> References: <3.0.1.32.20051008215252.00a74ba8@pop.redshift.com> <3.0.1.32.20051008202606.00a74ba8@pop.redshift.com> <3.0.1.32.20051008202606.00a74ba8@pop.redshift.com> <3.0.1.32.20051008215252.00a74ba8@pop.redshift.com> <3.0.1.32.20051008220300.00a74ba8@pop.redshift.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="OwLcNYc0lM97+oe1" Content-Disposition: inline In-Reply-To: <3.0.1.32.20051008220300.00a74ba8@pop.redshift.com> User-Agent: Mutt/1.4.2.1i Cc: freebsd-amd64@freebsd.org, Kris Kennaway Subject: Re: /etc/make.conf X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Oct 2005 05:34:29 -0000 --OwLcNYc0lM97+oe1 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sat, Oct 08, 2005 at 10:03:00PM -0700, ray@redshift.com wrote: > I've been running those flags for years - if you would like to supply some logic > as to why they won't work on the AMD platform, then maybe that would help. If > your advice is just "don't do that, it's bad", then doesn't help much. -O2 has > always worked fine for our production servers. What flag specifically are you > nervous about? -funroll-loops is kind of stupid to use globally. Chances are it's hurting your performance more than it's helping. -O2 was also unsafe prior to the 5.x branch, but it should be OK now post-5.x (where it's the default). Kris --OwLcNYc0lM97+oe1 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDSKZKWry0BWjoQKURApo+AKCFQTYNDtxcCyCpjnG1Mz+gxStsPACfcuop zib9ZSEZCMEpQXXxm2AjJj0= =7K4X -----END PGP SIGNATURE----- --OwLcNYc0lM97+oe1--