Date: Tue, 21 Jun 2005 09:42:48 -0400 From: Mike Tancsa <mike@sentex.net> To: eng@donut.ugcs.caltech.edu, freebsd-performance@freebsd.org Subject: Re: sustained sequential disk IO runs interactivity into the ground Message-ID: <6.2.1.2.0.20050621092842.05c8cd30@64.7.153.2> In-Reply-To: <20050621025727.GI24844@philemon.async.caltech.edu> References: <20050621025727.GI24844@philemon.async.caltech.edu>
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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
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