Date: Mon, 24 Mar 2003 13:20:40 -0800 From: Kris Kennaway <kris@obsecurity.org> To: current@FreeBSD.org Subject: ACPI using too much CPU on idle system Message-ID: <20030324212040.GF2462@rot13.obsecurity.org>
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top -S shows the following on my machine:
CPU states: 0.8% user, 0.0% nice, 80.3% system, 12.9% interrupt, 6.1% id=
le
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_task2
5 root -84 0 0K 12K actask 1:33 18.21% 18.21% acpi_task0
6 root -84 0 0K 12K actask 1:33 17.82% 17.82% acpi_task1
21 root -68 -187 0K 12K WAIT 0:55 4.98% 4.98% irq9: fxp=
0 atapci0*
17 root -24 -143 0K 12K WAIT 0:06 0.83% 0.83% swi6: acp=
itaskq
=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? :)
Kris
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