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Date:      Thu, 27 Mar 2003 20:35:24 -0800
From:      Kris Kennaway <kris@obsecurity.org>
To:        Kris Kennaway <kris@obsecurity.org>
Cc:        current@FreeBSD.ORG
Subject:   Re: ACPI using too much CPU on idle system
Message-ID:  <20030328043524.GA18639@rot13.obsecurity.org>
In-Reply-To: <20030324212040.GF2462@rot13.obsecurity.org>
References:  <20030324212040.GF2462@rot13.obsecurity.org>

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On Mon, Mar 24, 2003 at 01:20:40PM -0800, Kris Kennaway wrote:
> top -S shows the following on my machine:
>=20
> CPU states:  0.8% user,  0.0% nice, 80.3% system, 12.9% interrupt,  6.1% =
idle
>=20
>   PID USERNAME PRI NICE   SIZE    RES STATE    TIME   WCPU    CPU COMMAND
>    11 root     -16    0     0K    12K RUN    563:23 32.23% 32.23% idle
>     7 root     -84    0     0K    12K actask   1:33 18.51% 18.51% acpi_ta=
sk2
>     5 root     -84    0     0K    12K actask   1:33 18.21% 18.21% acpi_ta=
sk0
>     6 root     -84    0     0K    12K actask   1:33 17.82% 17.82% acpi_ta=
sk1
>    21 root     -68 -187     0K    12K WAIT     0:55  4.98%  4.98% irq9: f=
xp0 atapci0*
>    17 root     -24 -143     0K    12K WAIT     0:06  0.83%  0.83% swi6: a=
cpitaskq
> =20
> The machine is supposedly idle..no process, disk or network activity,
> so I can't see any reason for all this kernel CPU activity.  What is
> going on?  Is this some kind of software-emulated CPU step-down
> because ACPI has decided my CPU is too fast? :)

Hello, ACPI people?  I haven't had any response to this yet.

Kris

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