From owner-freebsd-questions@FreeBSD.ORG  Thu Aug 26 20:34:55 2004
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
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 309B216A4CE; Thu, 26 Aug 2004 20:34:55 +0000 (GMT)
Received: from aiolos.otenet.gr (aiolos.otenet.gr [195.170.0.23])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id C139F43D1D; Thu, 26 Aug 2004 20:34:52 +0000 (GMT)
	(envelope-from keramida@ceid.upatras.gr)
Received: from gothmog.gr (patr530-a166.otenet.gr [212.205.215.166])
	i7QKYmqD002160;	Thu, 26 Aug 2004 23:34:49 +0300
Received: from gothmog.gr (gothmog [127.0.0.1])
	by gothmog.gr (8.13.1/8.13.1) with ESMTP id i7QKXEoA034523;
	Thu, 26 Aug 2004 23:33:14 +0300 (EEST)
	(envelope-from keramida@ceid.upatras.gr)
Received: (from giorgos@localhost)
	by gothmog.gr (8.13.1/8.13.1/Submit) id i7QKXDOm034510;
	Thu, 26 Aug 2004 23:33:13 +0300 (EEST)
	(envelope-from keramida@ceid.upatras.gr)
Date: Thu, 26 Aug 2004 23:33:13 +0300
From: Giorgos Keramidas <keramida@ceid.upatras.gr>
To: Gary Kline <kline@tao.thought.org>
Message-ID: <20040826203313.GA531@gothmog.gr>
References: <412D10E7.8020704@makeworld.com>
	<20040826000715.GD89034@thought.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20040826000715.GD89034@thought.org>
Phone: +30-2610-312145
Mobile: +30-6944-116520
cc: freebsd-current@freebsd.org
cc: freebsd-questions@freebsd.org
Subject: Re: 5.3-Beta1: So far, so goo. Day 5.
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 26 Aug 2004 20:34:55 -0000

On 2004-08-25 17:07, Gary Kline <kline@tao.thought.org> wrote:
>
> 	But Q1:  how exactly, does one get rid of the debugging stuff?

You can disable most of the debugging stuff with:

	# /bin/rm -fr /etc/malloc.conf
	# ln -s ajr /etc/malloc.conf

and then commenting our or deleting the following options from your
kernel config file:

%%%
makeoptions	DEBUG=-g		# Build kernel with gdb(1) debug symbols
options 	KDB			# Enable kernel debugger support.
options 	DDB			# Support DDB.
options 	GDB			# Support remote GDB.
options 	INVARIANTS		# Enable calls of extra sanity checking
options 	INVARIANT_SUPPORT	# Extra sanity checks of internal structures, required by INVARIANTS
options 	WITNESS			# Enable checks to detect deadlocks and cycles
options 	WITNESS_SKIPSPIN	# Don't run witness on spinlocks for speed
%%%

Disabling all of these is certainly going to yield a faster system.

> 	And Q2, now that we've got gcc-3.4, would it help to use a higher
> 	opyimization? say, "-O3"?   ....

I'm not sure if the speed gain is significant and worth the risk.
I still use the same make.conf settings, shown below:

	NO_CPU_CFLAGS=  true    # Don't add -march=<cpu> to CFLAGS automatically
	NO_CPU_COPTFLAGS=true   # Don't add -march=<cpu> to COPTFLAGS automatically

and I have commented out the CFLAGS and COPTFLAGS, the same way I did a
year ago and two years ago, etc.