Date: Sun, 26 Sep 2004 00:57:17 +0200 From: Michael Nottebrock <michaelnottebrock@gmx.net> To: Mauro Triulzi <triulzi@freesurf.ch> Cc: freebsd-current@freebsd.org Subject: Re: ATA disk performance (ICH2 controller), some tests and comparison with Linux2.6.5 Message-ID: <200409260057.21357.michaelnottebrock@gmx.net> In-Reply-To: <4155F2DB.6090006@freesurf.ch> References: <4155DC3F.5070904@freesurf.ch> <200409252358.10814.michaelnottebrock@gmx.net> <4155F2DB.6090006@freesurf.ch>
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--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 > <http://lists.freebsd.org/mailman/listinfo/freebsd-current>:/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--
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