Date: Fri, 12 Oct 2001 17:25:29 -0700 (PDT) From: Mikko Tyolajarvi <mikko@dynas.se> To: jrossiter@symantec.com Cc: hackers@freebsd.org Subject: Re: Severe I/O Problems Message-ID: <200110130025.f9D0PT562604@mikko.rsa.com> References: <OF771AB257.5E1F2BC6-ON88256AE3.0077DC3F@symantec.com>
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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
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