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Date: Fri, 27 Jul 2007 13:02:16 -0600
From: Scott Long <scottl@samsco.org>
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To: Rink Springer <rink@freebsd.org>
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Cc: current@freebsd.org
Subject: Re: Extremely high interrupt count / load on recent CURRENT
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Can you try removing drivers one at time until it goes away?  Also,
what kind of machine is this?

Scott


Rink Springer wrote:
> Hi everyone,
> 
> Since my last csup, I'm encountering very high interrupt counts (and
> thus, a high associated interrupt load) on my workstation.
> 
> vmstat -i reports:
> 
> interrupt                          total       rate
> irq1: atkbd0                       26087          1
> irq14: ata0                           58          0
> irq16: emu10kx0               1051388503      78968
> irq17: nvidia0+                  1189799         89
> irq20: ohci0                       16596          1
> irq21: ehci0                           1          0
> irq22: atapci1                   1387849        104
> irq23: atapci2                    905538         68
> irq24: arcmsr0                    176404         13
> irq27: isp0                           85          0
> irq28: bge0                     37642180       2827
> cpu0: timer                     26627670       1999
> cpu1: timer                     26595670       1997
> Total                         1145956440      86071
> 
> The problem is, when I remove the snd_emu10kx driver (I load it as a
> module in loader(8)), then irq28: bge0 starts to exhibit the same
> pattern, generating thousands of interrupts.
> 
> My kernel is GENERIC + ULE - WITNESS, but the problem also
> occured using plain GENERIC. dmesg is available at
> http://rink.nu/tmp/dmesg-pitchfork.txt
> 
> Can anyone help me track this down?
> 
> Regards,
>