From owner-freebsd-hackers Fri Oct 12 17:25:44 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from tholian.securitydynamics.com (mail.rsasecurity.com [204.167.112.129]) by hub.freebsd.org (Postfix) with SMTP id 83DC337B403 for ; Fri, 12 Oct 2001 17:25:40 -0700 (PDT) Received: from sdtihq24.securitydynamics.com by tholian.securitydynamics.com via smtpd (for hub.FreeBSD.org [216.136.204.18]) with SMTP; 13 Oct 2001 00:22:23 UT Received: from ebola.securitydynamics.com (ebola.securid.com [192.168.7.4]) by sdtihq24.securid.com (Pro-8.9.3/Pro-8.9.3) with ESMTP id UAA16105 for ; Fri, 12 Oct 2001 20:25:35 -0400 (EDT) Received: from spirit.dynas.se (localhost [127.0.0.1]) by ebola.securitydynamics.com (8.9.3+Sun/8.9.1) with SMTP id UAA23086 for ; Fri, 12 Oct 2001 20:25:33 -0400 (EDT) Received: (qmail 25713 invoked from network); 13 Oct 2001 00:25:32 -0000 Received: from explorer.rsa.com (HELO mikko.rsa.com) (10.81.217.59) by spirit.dynas.se with SMTP; 13 Oct 2001 00:25:32 -0000 Received: (from mikko@localhost) by mikko.rsa.com (8.11.6/8.11.6) id f9D0PT562604; Fri, 12 Oct 2001 17:25:29 -0700 (PDT) (envelope-from mikko) Date: Fri, 12 Oct 2001 17:25:29 -0700 (PDT) From: Mikko Tyolajarvi Message-Id: <200110130025.f9D0PT562604@mikko.rsa.com> To: jrossiter@symantec.com Cc: hackers@freebsd.org Subject: Re: Severe I/O Problems Newsgroups: local.freebsd.hackers References: X-Newsreader: NN version 6.5.6 (NOV) Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In local.freebsd.hackers you write: >There appear to be a lot of changes that went into the filesystem and I/O >code between 4.3 and 4.4. A little over a week ago I upgraded my 4.3 box >to 4.4-STABLE and immediately I started having I/O slowdown. I do >development and QA on a program that is very I/O bound, but the changes >between 4.3 and 4.4 aren't small enough that I can ignore them. >A few statistics: >BSD, P4 1.4GHz, ATA100 drives >- Normal test run on 4.3 was taking ~3 hours. >- Normal test run on 4.4 is taking 15-16 hours. >P3-800, ATA66 drives, SuSE Linux 7.1: >- Normal test run takes ~4.5 hours. >UltraSparc 10, Solaris 8, ATA66 drives: >- Normal test run takes ~6 hours. >As you can see, this jump was just phenomenal. Yup, sure looks bad. Post output from at least: % dmesg | grep ata % sysctl -a | grep ata % mount | grep ufs to give people something more to go on. $.02, /Mikko -- Mikko Työläjärvi_______________________________________mikko@rsasecurity.com RSA Security To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message