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Date:      Mon, 13 Nov 2000 10:10:30 -0800
From:      Scott Gasch <scott@mail.medsp.com>
To:        questions@freebsd.org
Subject:   sluggish machine
Message-ID:  <20001113101026.A43179@www.medsp.com>

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Hello,

This sounds crazy but there is something wrong with my FreeBSD
4.1.1-STABLE box.  I recently upgraded from 4.0-RELEASE where things
were fine.  But now, the machine is slow.

There are no processes consuming the CPU and the load average is near
zero.  So it's not a scheduling / resource demand issue.  Network
traffic seems normal.  It seems to me that it has something to do with
the IO system... whenever file IO happens the whole machine gets very
slow.  The mouse slows down in X, the keyboard interrupt is not
processed and it consistently takes about 5 seconds to save a small
text file from any editor!  In addition, editing (typing/moving the
cursor around) is like using MS-Outlook when another email comes in --
every once in a while the whole thing just freezes up for 5 sec!  This
happens with emacs and vi both.

I've looked at the system logs and found no driver complaining about a
bum hard disk or otherwise.  But it seems to me like something is
masking off interrupts and taking an inordinately long time to
reenable them.  Rebooting does not help.  How can I narrow down the
cause and track this problem?

Thanks,
Scott

P.S. There is no "strange" hardware on this box IMO.  Nothing that
doesn't have a pretty stable driver.  With the possible exception of
the (empty) USB ports.

-- 
Scott Gasch
scott@wannabe.guru.org


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