Hi,
With 2.5.73 with ACPI enabled on my P4 HT system irq 18 seems to be
very busy:
CPU0 CPU1
0: 633529 76869 IO-APIC-edge timer
2: 0 0 XT-PIC cascade
9: 0 0 IO-APIC-level acpi
14: 12139 0 IO-APIC-edge ide0
15: 2 0 IO-APIC-edge ide1
16: 58707 0 IO-APIC-level uhci-hcd, uhci-hcd, nvidia
17: 56840 0 IO-APIC-level Intel ICH5
18: 88494437 48181320 IO-APIC-level ide2, uhci-hcd
19: 15975 0 IO-APIC-level uhci-hcd
20: 183 0 IO-APIC-level ohci1394
21: 1647 0 IO-APIC-level eth0
23: 68 0 IO-APIC-level ehci_hcd
NMI: 0 0
LOC: 710285 710628
ERR: 0
MIS: 0
ide2 is the onboard Intel SATA (ICH5) controller. I am not sure what is
causing these interrupts.
Top shows a lot of CPU load being generated caused by the high interrupt
count:
81 processes: 80 sleeping, 1 running, 0 zombie, 0 stopped
CPU0 states: 2.0% user 58.0% system 0.0% nice 0.0% iowait 40.0%
idle
CPU1 states: 3.0% user 0.0% system 0.0% nice 0.0% iowait 97.0%
idle
Mem: 515480k av, 198452k used, 317028k free, 0k shrd, 14760k
buff
122252k active, 50596k inactive
Swap: 787176k av, 0k used, 787176k free 94040k
cached
I've had the same problem with 2.4.21 plus a recent ACPI. What can be
the culprit?
Cheers,
Jurgen