The prime cause why I'm doing this is kacpid, which takes 50% of the CPU sometimes. Furthermore I've got a warning from DMAR. And I suspect also a problems with cpu power regulation:
dmesg
Initializing CPU#0
------------[ cut here ]------------
WARNING: at drivers/pci/dmar.c:588 warn_invalid_dmar+0x7f/0xa0() (Not tainted)
Hardware name: S3210SH
[Firmware Warn]: Your BIOS is broken; DMAR reported at address feb00000 returns all ones!
BIOS vendor: Intel Corporation; Ver: S3200X38.86B.00.00.0042.042820081723; Product Version:
Modules linked in:
Pid: 0, comm: swapper Not tainted 2.6.32-431.el6.i686 #1
Call Trace:
[<c045b0d1>] ? warn_slowpath_common+0x81/0xc0
[<c063728f>] ? warn_invalid_dmar+0x7f/0xa0
[<c063728f>] ? warn_invalid_dmar+0x7f/0xa0
[<c045b163>] ? warn_slowpath_fmt_taint+0x33/0x40
[<c063728f>] ? warn_invalid_dmar+0x7f/0xa0
[<c0b0f787>] ? check_zero_address+0xfb/0x132
[<c067fdef>] ? acpi_tb_verify_table+0x1d/0x46
[<c0b0f7cc>] ? detect_intel_iommu+0xe/0x57
[<c0aff3df>] ? mem_init+0x10/0x2ab
[<c0ae7817>] ? start_kernel+0x1d1/0x3b5
[<c0ae7484>] ? unknown_bootoption+0x0/0x190
---[ end trace a7919e7f17c0a725 ]---
[root@localhost]# cat /proc/acpi/processor/CPU0/info
processor id: 0
acpi id: 1
bus mastering control: no
power management: no
throttling control: no
limit interface: no
[root@localhost]# SELViewer
- System Event #0x83 Informational event: System Event sensor 131 reports Timestamp Clock Sync. Event is first of two expected events from BIOS on every power on. BIOS (Channel #00h)
- System Event #0x83 Informational event: System Event sensor 131 reports Timestamp Clock Sync. Event is second of two expected events from BIOS on every power on. BIOS (Channel #00h)
- System Firmware Progress #0x06 Informational event: System Firmware Progress sensor 6 reports Processor 01 BIOS does not support the current stepping for processor. SMI Handler (Channel #00h)