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From: Mel <fbsd.questions@rachie.is-a-geek.net>
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Date: Thu, 29 Jan 2009 07:38:38 -0900
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Cc: Artem Kuchin <matrix@itlegion.ru>
Subject: Re: 6.8 became very slow
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On Thursday 29 January 2009 06:39:22 Artem Kuchin wrote:

> I am sure this is not the case because the new raid was simply recreated
> manually using 3ware bios and
> then freebsd installed and then old data copied from backup.

Ah, I got that wrong from your mail.

> BTW, here are the interrupts:
> interrupt                          total       rate
> irq14: ata0                           47          0
> irq15: ata1                      4818547          3
> irq28: em0                     137807398        105
> irq72: twe0                     66970618         51
> cpu0: timer                   2606991398       2000
> cpu1: timer                   2596549865       1992
> cpu2: timer                   2606991199       2000
> cpu3: timer                   2596549863       1992
> Total                        10616678935       8145

That should be normal:
cpu0: timer                    961443545       1999
irq256: em0                       660532          1
cpu1: timer                    961433589       1999

$ sysctl kern.clockrate
kern.clockrate: { hz = 1000, tick = 1000, profhz = 2000, stathz = 133 }

Not much has gone in 6-STABLE since 6.4 release. I would sync binaries in one 
jail that is offensive at the moment and restart it. See if the problem goes 
away for that jail.
Resolver libraries and openssl have had an update for security patches, but 
that doesn't explain the kernel having a hard time.
-- 
Mel

Problem with today's modular software: they start with the modules
    and never get to the software part.