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Date: Thu, 19 Nov 2009 18:27:23 -0500
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From: "illoai@gmail.com" <illoai@gmail.com>
To: neutral neutral <ptr.neutral@gmail.com>
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Cc: freebsd-current@freebsd.org
Subject: Re: High INTERRUPT rate on CPU 0
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2009/11/17 neutral neutral <ptr.neutral@gmail.com>:
> Hello,
>
> Yesterday I get a fresh install of FreeBSD 8.0 RC3 Current. However just
> some hours after the installation the machine began very slow/laggy.
. . .
> $ vmstat -i
> interrupt =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0total =A0 =
=A0 =A0 rate
> irq1: atkbd0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 201 =A0 =A0 =
=A0 =A0 =A00
> irq12: psm0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A09 =A0 =
=A0 =A0 =A0 =A00
> irq16: fwohci0+ =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A02 =A0 =A0 =
=A0 =A0 =A00
> irq19: uhci2 ehci* =A0 =A0 =A0 =A0 =A0 =A0 =A025229879 =A0 =A0 =A089151
> irq23: uhci3 ehci1 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A04852 =A0 =A0 =A0 =
=A0 17
> cpu0: timer =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 565386 =A0 =A0 =
=A0 1997
> irq256: mskc0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0389 =A0 =A0 =
=A0 =A0 =A01
> cpu1: timer =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 562755 =A0 =A0 =
=A0 1988
> Total =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 26363473 =A0 =
=A0 =A093157
> $
>
>
> $ dmesg | grep uhci2
> uhci2: <Intel 82801I (ICH9) U$ dmesg | grep uhci2
> uhci2: <Intel 82801I (ICH9) USB controller> port 0x1840-0x185f irq 19 at
> device 26.2 on pci0
> uhci2: [ITHREAD]
> uhci2: LegSup =3D 0x0010
> usbus2: <Intel 82801I (ICH9) USB controller> on uhci2
> SB controller> port 0x1840-0x185f irq 19 at device 26.2 on pci0
> uhci2: [ITHREAD]
> uhci2: LegSup =3D 0x0010
> usbus2: <Intel 82801I (ICH9) USB controller> on uhci2

Umm, IRQ19 looks a bit suspect.  My noisiest non-CPU IRQ
is running 31, so you're only 3 orders of magnitude higher.

What usb devices do you have attached to those controllers?

--=20
--