From owner-freebsd-current@FreeBSD.ORG Sat Sep 25 22:57:25 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 136C616A4CE for ; Sat, 25 Sep 2004 22:57:25 +0000 (GMT) Received: from meitner.wh.uni-dortmund.de (meitner.wh.uni-dortmund.de [129.217.129.133]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6C75443D39 for ; Sat, 25 Sep 2004 22:57:24 +0000 (GMT) (envelope-from michaelnottebrock@gmx.net) Received: from lofi.dyndns.org (pc2-105.intern.meitner [10.3.12.105]) by meitner.wh.uni-dortmund.de (Postfix) with ESMTP id 7F4901674DE; Sun, 26 Sep 2004 00:57:23 +0200 (CEST) Received: from kiste.my.domain (lofi@kiste.my.domain [192.168.8.4]) (authenticated bits=0) by lofi.dyndns.org (8.12.10/8.12.10) with ESMTP id i8PMvMmG069409 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NO); Sun, 26 Sep 2004 00:57:22 +0200 (CEST) (envelope-from michaelnottebrock@gmx.net) From: Michael Nottebrock To: Mauro Triulzi Date: Sun, 26 Sep 2004 00:57:17 +0200 User-Agent: KMail/1.7 References: <4155DC3F.5070904@freesurf.ch> <200409252358.10814.michaelnottebrock@gmx.net> <4155F2DB.6090006@freesurf.ch> In-Reply-To: <4155F2DB.6090006@freesurf.ch> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1268261.DerFzrbzhT"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200409260057.21357.michaelnottebrock@gmx.net> X-Virus-Scanned: by amavisd-new cc: freebsd-current@freebsd.org Subject: Re: ATA disk performance (ICH2 controller), some tests and comparison with Linux2.6.5 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 25 Sep 2004 22:57:25 -0000 --nextPart1268261.DerFzrbzhT Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Sunday 26 September 2004 00:36, Mauro Triulzi wrote: > Michael Nottebrock wrote: > > also substantially impact system performance. If you want to > > do performance measurement, benchmarking, and optimization, > > you'll want to turn them off. This includes various WITNESS- > > related kernel options, INVARIANTS, malloc debugging flags > > in userland, and various verbose features in the kernel. Many > > developers choose to disable these features on build machines > > to maximize performance. > > > >So... did you turn off all those? > > Yes of course: > > foo# uname -a > FreeBSD foo.bar.com 6.0-CURRENT FreeBSD 6.0-CURRENT #0: Sat Sep 25 > 17:54:29 CEST 2004 > triulzi at foo.bar.com > :/usr/src/sys/= i3 >86/compile/MYKERNEL i386 > > source tree actualized and built today, *all debugging options disabled There's more places than the kernel config to turn off performance killing= =20 debugging, in particular malloc's options - in CURRENT it defaults to AJ,=20 while on releases/stable it defaults to aj (see malloc manpage, paragraph=20 TUNING). =2D-=20 ,_, | Michael Nottebrock | lofi@freebsd.org (/^ ^\) | FreeBSD - The Power to Serve | http://www.freebsd.org \u/ | K Desktop Environment on FreeBSD | http://freebsd.kde.org --nextPart1268261.DerFzrbzhT Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQBBVffRXhc68WspdLARAidIAKCD11oBbjX//FbU8IHp8MABsy0qlgCdH7o4 Kd4coxxrqc7tEkS4ygn7uJA= =s9r5 -----END PGP SIGNATURE----- --nextPart1268261.DerFzrbzhT--