From owner-freebsd-performance@FreeBSD.ORG Mon Oct 30 01:33:17 2006 Return-Path: X-Original-To: performance@freebsd.org Delivered-To: freebsd-performance@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B8E5016A407 for ; Mon, 30 Oct 2006 01:33:17 +0000 (UTC) (envelope-from grog@lemis.com) Received: from ext-gw.lemis.com (ext-gw.lemis.com [150.101.14.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7BDC343D46 for ; Mon, 30 Oct 2006 01:33:16 +0000 (GMT) (envelope-from grog@lemis.com) Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.135]) by ext-gw.lemis.com (Postfix) with ESMTP id EBF161330F3; Mon, 30 Oct 2006 12:03:14 +1030 (CST) Received: by wantadilla.lemis.com (Postfix, from userid 1004) id D4DA19C277; Mon, 30 Oct 2006 12:03:14 +1030 (CST) Date: Mon, 30 Oct 2006 12:03:14 +1030 From: Greg 'groggy' Lehey To: Steve Peterson Message-ID: <20061030013314.GD1052@wantadilla.lemis.com> References: <6.2.3.4.0.20061027180329.020bed68@localhost> <4542D941.2070204@centtech.com> <6.2.3.4.0.20061028124559.02105930@localhost> <4543AD35.30205@he.iki.fi> <6.2.3.4.0.20061029095927.05833580@localhost> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="/3yNEOqWowh/8j+e" Content-Disposition: inline In-Reply-To: <6.2.3.4.0.20061029095927.05833580@localhost> User-Agent: Mutt/1.4.2.1i Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 VoIP: sip:0871270137@sip.internode.on.net WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 9A1B 8202 BCCE B846 F92F 09AC 22E6 F290 507A 4223 Cc: performance@freebsd.org, Petri Helenius Subject: Re: gvinum raid5 performance seems slow X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Oct 2006 01:33:17 -0000 --/3yNEOqWowh/8j+e Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sunday, 29 October 2006 at 11:20:33 -0600, Steve Peterson wrote: > Petri -- thanks for the idea. It would be a good idea to quote it. Following this thread is almost impossible. > I ran 2 dds in parallel; they took roughly twice as long in clock > time, and had about 1/2 the throughput of the single dd. On my > system it doesn't look like how the work is offered to the disk > subsystem matters. Try running rawio. That's what it's for. Greg [more trailing junk omitted. Why do you attach it?] -- See complete headers for address and phone numbers. --/3yNEOqWowh/8j+e Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFFRVZaIubykFB6QiMRAsYsAJ0Y0xdUK2eQNw/VqRdtUqwcRBm8ngCeISaB 8IibjbOZY9oaqQV3nGXI1kE= =7D+4 -----END PGP SIGNATURE----- --/3yNEOqWowh/8j+e--