high CPU activity for interrupts

[guru at Sisis.de]

Hello,

This is with FreeBSD 5.4-REL on a Fujitsu-Siemens notebook, type Amilo.
Without inserting or using any PCMCIA card from time ti time I see
an increasing temperature of the CPU (this was the only reason why
I noted it at all) and top shows:

CPU states:  0.8% user,  0.0% nice,  0.4% system, 22.9% interrupt, 76.0% idle

The high rate of interrupts are coming from cardbus somehow:

$ vmstat -i
interrupt                          total       rate
irq0: clk                        1526386         99
irq1: atkbd0                       19720          1
irq4: sio0                             2          0
irq6: fdc0                            10          0
irq7:                                  3          0
stray irq7                             3          0
irq8: rtc                        1953511        127
irq9: acpi0                         1102          0
irq11: cbb1 pcm0++*            126785936       8304 <***********
irq12: psm0                       116294          7
irq14: ata0                        70657          4
irq15: ata1                        33673          2
Total                          130507297       8548

Some more infos from sysctl:

$ sysctl -a | fgrep cbb
hw.cbb.start_memory: 2281701376
hw.cbb.start_16_io: 256
hw.cbb.start_32_io: 4096
hw.cbb.debug: 0
dev.cbb.0.%desc: ENE CB1420 PCI-CardBus Bridge
dev.cbb.0.%driver: cbb
dev.cbb.0.%location: slot=9 function=0 handle=\_SB_.PCI0.CRD0
dev.cbb.0.%pnpinfo: vendor=0x1524 device=0x1420 subvendor=0x17c0 subdevice=0x320
2 class=0x060700
dev.cbb.0.%parent: pci0
dev.cbb.1.%desc: ENE CB1420 PCI-CardBus Bridge
dev.cbb.1.%driver: cbb
dev.cbb.1.%location: slot=9 function=1 handle=\_SB_.PCI0.CRD1
dev.cbb.1.%pnpinfo: vendor=0x1524 device=0x1420 subvendor=0x17c0 subdevice=0x320
2 class=0x060700
dev.cbb.1.%parent: pci0
dev.cardbus.0.%parent: cbb0
dev.cardbus.1.%parent: cbb1
dev.pccard.0.%parent: cbb0
dev.pccard.1.%parent: cbb1
$ sysctl -a | fgrep pcm
hw.snd.pcm0.buffersize: 16384
hw.snd.pcm0.vchans: 4
hw.snd.pcm0.ac97rate: 48000
dev.pcm.0.%desc: SiS 7012
dev.pcm.0.%driver: pcm
dev.pcm.0.%location: slot=2 function=7
dev.pcm.0.%pnpinfo: vendor=0x1039 device=0x7012 subvendor=0x17c0 subdevice=0x200
0 class=0x040100
dev.pcm.0.%parent: pci0


What can I do?

	matthias

-- 
Matthias Apitz / Sisis Informationssysteme GmbH
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