From owner-freebsd-current@FreeBSD.ORG Thu Sep 9 20:38:20 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 B804C16A4CE; Thu, 9 Sep 2004 20:38:20 +0000 (GMT) Received: from spider.deepcore.dk (cpe.atm2-0-53484.0x50a6c9a6.abnxx9.customer.tele.dk [80.166.201.166]) by mx1.FreeBSD.org (Postfix) with ESMTP id D501D43D5E; Thu, 9 Sep 2004 20:38:19 +0000 (GMT) (envelope-from sos@DeepCore.dk) Received: from [194.192.25.143] (laptop.deepcore.dk [194.192.25.143]) by spider.deepcore.dk (8.12.11/8.12.10) with ESMTP id i89KcCTb040919; Thu, 9 Sep 2004 22:38:12 +0200 (CEST) (envelope-from sos@DeepCore.dk) Message-ID: <4140BF0B.6090308@DeepCore.dk> Date: Thu, 09 Sep 2004 22:37:31 +0200 From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= User-Agent: Mozilla Thunderbird 0.7.2 (X11/20040802) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Kevin Oberman References: <20040909202807.1F5295D09@ptavv.es.net> In-Reply-To: <20040909202807.1F5295D09@ptavv.es.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable cc: sos@FreeBSD.ORG cc: freebsd-current@FreeBSD.ORG cc: Bjoern Koenig Subject: Re: poor ATA disk speed with ICH2 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: Thu, 09 Sep 2004 20:38:20 -0000 Kevin Oberman wrote: > Here are the results of my last test back in May plus tests done on a > kernel built from sources downloaded on Sep. 6. Is that going to catch > your fix? I don't see much difference. Do you have version number I can= > check? Sep 6 should be fine if we are talking -current, on RELENG_5 it=20 "depends" since the MFC was done on the 6'th.. >=20 > Buffer V4 Read V4 Write V5 Read V5 Write =20 > 512 8385790 8111781 6921714 5115853 7130873 5261294 > 1k 15457027 14865113 12330562 7811422 12494677 7952281 > 2k 25677856 25273251 19939822 10572186 20137339 10708676 > 4k 27083255 25897711 27096896 12860586 27064850 12982472 > 8k 27079563 26033768 27097726 14416520 27017494 14497783 > 16k 27082575 Oops! 27082273 15316924 26936316 15374888 > 32k 27080720 25908336 27100118 15816203 26977041 15853140 > 64k 27079904 26008387 27096093 16073422 26939153 15938326 > 128k 27055901 25928520 27095673 16073422 > 256k 27076467 25918950 27090967 16118789 > 512k 27045087 25987266 27077925 16006708 > 1m 27026694 25738575 27060626 15879266 >=20 > Read: dd if=3D/dev/ad2 of=3D/dev/null bs=3Dnnn > Write:dd if=3D/dev/zero of=3D/dev/ad2 bs=3Dnnn > All tests run for about 30 seconds. > All tests in single-user mode. Nothing on ad2 is mounted. > Debug (WITNESS, INVARIANTS, malloc checking) disabled. > While the test is running, the disk being written to "sings" with the > frequency somewhat dependent on the size of the write. On read, I get > silence. When I copy my full disk (if=3Dad0 of=3Dad2), I can clearly he= ar > the sound of the actuator moving the heads constantly toward the end of= > the backup. I assume that they are being returned to track 0 on a > repeated basis. There should be no seeks on a lone write to the raw disk, if there is=20 you have HW problems as the driver doesn't issue any seeks at all then. What disks are this BTW ? -S=F8ren