Date: Mon, 13 Nov 1995 13:42:45 +0000 From: Simon Marlow <simonm@dcs.gla.ac.uk> To: uhclem (Frank Durda IV) <@fw.ast.com:uhclem@nemesis> Cc: current@freebsd.org Subject: Re: Disk I/O that binds Message-ID: <199511131422.GAA06017@who.cdrom.com> In-Reply-To: Your message of "Sun, 12 Nov 1995 13:13:00 %2B0700." <m0tEhqS-000J05C@nemesis.lonestar.org>
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> My system where I have seen something that somewhat resembles his > description is a mixed IDE SCSI system, and when things bog, the hog > process and the binding process are both trying to get to the same > SCSI drive. The IDE is for swap and root and is idle during these events. > > And in answer to someone elses' question, there was no tape I/O or > CD-ROM I/O active during these events on either system. Only SCSI disk. Just a guess, but could this be caused by the disk request sorting done by FreeBSD? New requests get entered into the queue possibly before old ones, and it could be a long time before a request finally gets serviced. Cheers, Simon -- Simon Marlow simonm@dcs.gla.ac.uk Research Assistant http://www.dcs.gla.ac.uk/~simonm/ finger for PGP public key
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