From owner-freebsd-performance@FreeBSD.ORG Tue Jun 21 13:42:16 2005 Return-Path: X-Original-To: freebsd-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 5C1EB16A41C for ; Tue, 21 Jun 2005 13:42:16 +0000 (GMT) (envelope-from mike@sentex.net) Received: from smarthost1.sentex.ca (smarthost1.sentex.ca [64.7.153.18]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1A68043D48 for ; Tue, 21 Jun 2005 13:42:15 +0000 (GMT) (envelope-from mike@sentex.net) Received: from pumice3.sentex.ca (pumice3.sentex.ca [64.7.153.26]) by smarthost1.sentex.ca (8.13.3/8.13.3) with ESMTP id j5LDfllG016502 for ; Tue, 21 Jun 2005 09:41:47 -0400 (EDT) (envelope-from mike@sentex.net) Received: from lava.sentex.ca (pyroxene.sentex.ca [199.212.134.18]) by pumice3.sentex.ca (8.13.3/8.13.3) with ESMTP id j5LDgE2O015689; Tue, 21 Jun 2005 09:42:14 -0400 (EDT) (envelope-from mike@sentex.net) Received: from simian.sentex.net (simeon.sentex.ca [192.168.43.27]) by lava.sentex.ca (8.13.3/8.13.3) with ESMTP id j5LDg8sG000532 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 21 Jun 2005 09:42:08 -0400 (EDT) (envelope-from mike@sentex.net) Message-Id: <6.2.1.2.0.20050621092842.05c8cd30@64.7.153.2> X-Mailer: QUALCOMM Windows Eudora Version 6.2.1.2 Date: Tue, 21 Jun 2005 09:42:48 -0400 To: eng@donut.ugcs.caltech.edu, freebsd-performance@freebsd.org From: Mike Tancsa In-Reply-To: <20050621025727.GI24844@philemon.async.caltech.edu> References: <20050621025727.GI24844@philemon.async.caltech.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed X-Virus-Scanned: by amavisd-new X-Scanned-By: MIMEDefang 2.51 on 64.7.153.18 X-Scanned-By: MIMEDefang 2.51 on 64.7.153.26 Cc: Subject: Re: sustained sequential disk IO runs interactivity into the ground 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: Tue, 21 Jun 2005 13:42:16 -0000 At 10:57 PM 20/06/2005, eng@donut.ugcs.caltech.edu wrote: >I was doing a dd of dev/zero into a file on a UFS2 filesystem >(softupdates disabled) on a clean 5.4-R system. I see the same issue on RELENG_5 with IDE disk. However, on FreeBSD nfs.sentex.ca 6.0-CURRENT FreeBSD 6.0-CURRENT #1: Fri Jun 17 No such issue against an IDE drive as well as an ARECA RAID5 array. The box is quite responsive while blasting the disks Also just tested against a RELENG_5 box and a twe RAID1 array and no problems. The system is totally responsive while doing So it might be the IDE drivers on RELENG_5 ? Perhaps try sos@freebsd.org's backport of the CURRENT IDE drivers to stable. ---Mike