From owner-freebsd-geom@FreeBSD.ORG Thu Mar 29 16:18:23 2007 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E2AA916A401; Thu, 29 Mar 2007 16:18:23 +0000 (UTC) (envelope-from pjd@garage.freebsd.pl) Received: from mail.garage.freebsd.pl (arm132.internetdsl.tpnet.pl [83.17.198.132]) by mx1.freebsd.org (Postfix) with ESMTP id 72DCD13C44B; Thu, 29 Mar 2007 16:18:23 +0000 (UTC) (envelope-from pjd@garage.freebsd.pl) Received: by mail.garage.freebsd.pl (Postfix, from userid 65534) id A982448805; Thu, 29 Mar 2007 18:18:21 +0200 (CEST) Received: from localhost (154.81.datacomsa.pl [195.34.81.154]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.garage.freebsd.pl (Postfix) with ESMTP id 76BD6487F2; Thu, 29 Mar 2007 18:18:11 +0200 (CEST) Date: Thu, 29 Mar 2007 18:18:07 +0200 From: Pawel Jakub Dawidek To: Eric Anderson Message-ID: <20070329161807.GB3325@garage.freebsd.pl> References: <003401c7712a$f71ebb60$6502a8c0@peteruj> <005c01c77134$28e0fce0$6502a8c0@peteruj> <86zm5xph7o.fsf@dwp.des.no> <005301c771e4$bb0a3900$6502a8c0@peteruj> <86lkhg5oz5.fsf@dwp.des.no> <007c01c771fe$805b2fc0$6502a8c0@peteruj> <86odmc42mh.fsf@dwp.des.no> <460BE21E.7070700@freebsd.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="hHWLQfXTYDoKhP50" Content-Disposition: inline In-Reply-To: <460BE21E.7070700@freebsd.org> X-PGP-Key-URL: http://people.freebsd.org/~pjd/pjd.asc X-OS: FreeBSD 7.0-CURRENT i386 User-Agent: mutt-ng/devel-r804 (FreeBSD) X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on mail.garage.freebsd.pl X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=BAYES_00 autolearn=ham version=3.0.4 Cc: Ivan Voras , freebsd-geom@freebsd.org Subject: Re: raid3 is slow X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Mar 2007 16:18:24 -0000 --hHWLQfXTYDoKhP50 Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Mar 29, 2007 at 10:58:22AM -0500, Eric Anderson wrote: > On 03/29/07 10:52, Ivan Voras wrote: > >Dag-Erling Sm?=B8rgrav wrote: > >>You don't seem to understand what the load averages mean. They are > >>the average number of runnable threads in the scheduler queue over the > >>last one, five and fifteen seconds. Certain workloads will drive up > >>the load averages without consuming all available CPU time. This is > >>particularly the case for workloads where small chunks of data (e.g. > >>RAID3 stripes) are passed around between multiple threads. > >But, in his case the threads DO seem to consume much more CPU time than = they should - especially the g_down thread. In this case, load avg ( as an = approximation of real=20 > >system load) is useful, and he's not concerned without cause. >=20 >=20 > It would be good to see output of a ps -auxl next time he's running the t= est. Maybe I missed it, but I think we should start from asking about CPU he uses:) Full dmesg would be best. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --hHWLQfXTYDoKhP50 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGC+a/ForvXbEpPzQRArH9AKDdbz9+hbDpbQgi+WBJJiHmi/mjJwCg05eS BaNOgfF7v/hUTqzRYgHsLl8= =awLv -----END PGP SIGNATURE----- --hHWLQfXTYDoKhP50--