From owner-freebsd-stable@FreeBSD.ORG Sat Nov 19 12:37:38 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BEBDA16A41F; Sat, 19 Nov 2005 12:37:38 +0000 (GMT) (envelope-from johan@stromnet.org) Received: from pne-smtpout1-sn1.fre.skanova.net (pne-smtpout1-sn1.fre.skanova.net [81.228.11.98]) by mx1.FreeBSD.org (Postfix) with ESMTP id 814C943D55; Sat, 19 Nov 2005 12:37:30 +0000 (GMT) (envelope-from johan@stromnet.org) Received: from elfi2.stromnet.org (81.231.107.13) by pne-smtpout1-sn1.fre.skanova.net (7.2.060.1) id 437DDFC20002BFCA; Sat, 19 Nov 2005 13:37:28 +0100 Received: from localhost (localhost [127.0.0.1]) by elfi2.stromnet.org (Postfix) with ESMTP id A9E18CF0D6; Sat, 19 Nov 2005 13:37:25 +0100 (CET) Received: from elfi2.stromnet.org ([127.0.0.1]) by localhost (elfi.stromnet.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 00639-04; Sat, 19 Nov 2005 13:37:22 +0100 (CET) Received: from [10.10.0.6] (vpn1-c1.stromnet.org [10.10.0.6]) by elfi2.stromnet.org (Postfix) with ESMTP id C32ABCF0C6; Sat, 19 Nov 2005 13:37:22 +0100 (CET) In-Reply-To: <20051119013552.GC735@garage.freebsd.pl> References: <991F35AA-151B-4AEA-82BD-5F4AEDF28424@stromnet.org> <74994962-5050-47BD-897B-DE3880B9EBD5@stromnet.org> <1132353600.903.19.camel@genius1.i.cz> <20051119013552.GC735@garage.freebsd.pl> Mime-Version: 1.0 (Apple Message framework v746.2) Content-Type: text/plain; charset=ISO-8859-1; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: quoted-printable From: =?ISO-8859-1?Q?Johan_Str=F6m?= Date: Sat, 19 Nov 2005 13:38:25 +0100 To: Pawel Jakub Dawidek X-Mailer: Apple Mail (2.746.2) X-Virus-Scanned: amavisd-new at stromnet.org Cc: freebsd-stable@freebsd.org Subject: Re: Page fault, GEOM problem?? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Nov 2005 12:37:38 -0000 On 19 nov 2005, at 02.35, Pawel Jakub Dawidek wrote: > On Sat, Nov 19, 2005 at 01:55:57AM +0100, Johan Str=F6m wrote: > +> I just noticed another thing... My disk performance... sucks! :P > +> > +> Some examples (from an otherwise unloaded system): > +> > +> root@elfi:/home/johan$ time dd if=3D/dev/zero of=3Dbigfile.zero =20 > bs=3D1024 count=3D1000000 > +> 1000000+0 records in > +> 1000000+0 records out > +> 1024000000 bytes transferred in 77.014797 secs (13296146 bytes/sec) > > You won't get more with such small block size. Try bs=3D128k. Hi Can't say that a bigger blocksize did much better.. root@elfi:/home/johan$ time dd if=3D/dev/zero of=3Dbigfile.zero bs=3D128k = =20 count=3D10000 10000+0 records in 10000+0 records out 1310720000 bytes transferred in 98.519181 secs (13304211 bytes/sec) root@elfi:/home/johan$ time dd if=3D/dev/zero of=3Dbigfile.zero bs=3D512k = =20 count=3D10000 ^C3587+0 records in 3587+0 records out 1880621056 bytes transferred in 145.049578 secs (12965367 bytes/sec) root@elfi:/home/johan$ time dd if=3D/dev/zero of=3Dbigfile.zero bs=3D50k = =20 count=3D10000 10000+0 records in 10000+0 records out 512000000 bytes transferred in 38.536217 secs (13286203 bytes/sec) All this time, iostats MB/s column wouldnt go over 0.24MB/s... Back on GENERIC: root@elfi:/home/johan$ time dd if=3D/dev/zero of=3Dbigfile.zero bs=3D128k = =20 count=3D10000 10000+0 records in 10000+0 records out 1310720000 bytes transferred in 99.497358 secs (13173415 bytes/sec) root@elfi:/home/johan$ time dd if=3D/dev/zero of=3Dbigfile.zero bs=3D512k = =20 count=3D1000 1000+0 records in 1000+0 records out 524288000 bytes transferred in 39.019239 secs (13436654 bytes/sec) Still slow.. However, iostat goes up as high as 5.64MB/s on each disk =20= in the mirror. > > --=20 > Pawel Jakub Dawidek http://www.wheel.pl > pjd@FreeBSD.org http://www.FreeBSD.org > FreeBSD committer Am I Evil? Yes, I Am!