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Date:      Wed, 21 Jul 2010 11:50:28 -0700 (PDT)
From:      Doug Barton <dougb@FreeBSD.org>
To:        Andriy Gapon <avg@icyb.net.ua>
Cc:        freebsd-current@FreeBSD.org
Subject:   Re: Why is intr taking up so much cpu?
Message-ID:  <alpine.BSF.2.00.1007211145410.1737@qbhto.arg>
In-Reply-To: <4C46AAD0.5080003@icyb.net.ua>
References:  <F653FF83-D9CF-42A2-AE9A-B8F914090065@FreeBSD.org> <alpine.BSF.2.00.1007171208010.1538@qbhto.arg> <20100717192128.GM2381@deviant.kiev.zoral.com.ua> <alpine.BSF.2.00.1007180113370.1707@qbhto.arg> <20100718103003.GO2381@deviant.kiev.zoral.com.ua> <4C43541C.3060101@FreeBSD.org> <20100718194109.GU2381@deviant.kiev.zoral.com.ua> <4C435CBE.50500@FreeBSD.org> <20100718202338.GI5485@dan.emsphone.com> <alpine.BSF.2.00.1007192259170.1725@qbhto.arg> <20100720164600.GA85770@dan.emsphone.com> <alpine.BSF.2.00.1007202342350.1717@qbhto.arg> <4C46AAD0.5080003@icyb.net.ua>

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On Wed, 21 Jul 2010, Andriy Gapon wrote:

>
>
> Doug,
>
> could you please show your timer configuration,

Nothing special in /boot/loader.conf, /etc/sysctl.conf, or my kernel. 
It's basically just GENERIC minus devices I don't have, plus the 
following:

options         DDB_CTF
options         VESA
options         GEOM_BDE
device          atapicam 
device          sound
device          snd_hda

Interestingly, I had a runaway intr thing again after watching a flash 
video, but this time it was hdac0, not swi:4.

http://people.freebsd.org/~dougb/bad-dtrace-3-hdac.txt
http://people.freebsd.org/~dougb/bad-dtrace-4-hdac.txt

> part of devinfo -u that describes interrupts

Interrupt request lines:
     0 (attimer0)
     1 (atkbd0)
     3 (root0)
     4 (uart0)
     5-7 (root0)
     8 (atrtc0)
     9 (acpi0)
     10-11 (root0)
     12 (psm0)
     12 (psmcpnp0)
     13 (root0)
     14 (ata0)
     15 (ata1)
     16 (root0)
     17 (wpi0)
     18 (cbb0)
     19 (root0)
     20 (ehci0)
     20 (uhci0)
     20 (hpet0)
     21 (uhci1)
     22 (uhci2)
     23 (uhci3)
     256 (hdac0)

> and top of the output of top -SPH (including the header)
> when high interrupt load strikes?

Will do next time, thanks!


Doug

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