> Looks like driver interrupts, on cpu #0, and at IPL
> 4.
>
> What interrupts are bound to cpu 0 / IPL 4, on your
> machine? This information is printed by
>
> echo ::interrupts | mdb -k
This is whole lot while 'sane' (close to 0 CPU use):
IRQ Vect IPL Bus Trg Type CPU Share APIC/INT# ISR(s)
1 0x41 5 ISA Edg Fixed 1 1 0x0/0x1 i8042_intr
4 0xb0 12 ISA Edg Fixed 0 1 0x0/0x4 asyintr
7 0x43 5 ISA Edg Fixed 1 1 0x0/0x7 ecpp_isr
9 0x81 9 PCI Lvl Fixed 1 1 0x0/0x9 acpi_wrapper_isr
12 0x42 5 ISA Edg Fixed 0 1 0x0/0xc i8042_intr
14 0x40 5 ISA Edg Fixed 0 1 0x0/0xe ata_intr
15 0x44 5 ISA Edg Fixed 1 1 0x0/0xf ata_intr
16 0x88 9 PCI Lvl Fixed 1 3 0x0/0x10 drm_irq_handler_wrap,
wpi_intr, bge_intr
18 0x84 9 PCI Lvl Fixed 1 2 0x0/0x12 pcic_intr, uhci_intr
19 0x85 9 PCI Lvl Fixed 0 2 0x0/0x13 hci1394_isr, uhci_intr
20 0x82 9 PCI Lvl Fixed 1 2 0x0/0x14 uhci_intr, ehci_intr
21 0x83 9 PCI Lvl Fixed 0 2 0x0/0x15 audiohd_intr, uhci_intr
22 0x20 1 PCI Lvl Fixed 0 1 0x0/0x16 sdhost_intr
24 0x86 7 PCI Edg MSI 1 1 - pepb_intr_handler
25 0x30 4 PCI Edg MSI 0 1 - pepb_intr_handler
26 0x87 7 PCI Edg MSI 1 1 - pepb_intr_handler
160 0xa0 0 Edg IPI all 0 - poke_cpu
192 0xc0 13 Edg IPI all 1 - xc_serv
208 0xd0 14 Edg IPI all 1 - kcpc_hw_overflow_intr
209 0xd1 14 Edg IPI all 1 - cbe_fire
210 0xd3 14 Edg IPI all 1 - cbe_fire
240 0xe0 15 Edg IPI all 1 - xc_serv
241 0xe1 15 Edg IPI all 1 - apic_error_intr
device | cpu0 %tim cpu1 %tim
-------------+------------------------------
ata#1 | 0 0.0 0 0.0
audiohd#0 | 2 0.0 0 0.0
bge#0 | 0 0.0 59 0.0
ehci#0 | 0 0.0 4 0.0
hci1394#0 | 2 0.0 0 0.0
i915#0 | 0 0.0 59 0.0
pcic#0 | 0 0.0 2 0.0
uhci#0 | 0 0.0 4 0.0
uhci#1 | 2 0.0 0 0.0
uhci#2 | 0 0.0 2 0.0
uhci#3 | 2 0.0 0 0.0
wpi#0 | 0 0.0 59 0.1
The latter doesn't change very much once the mess has started, though (this is
after the CPU use has bumped to 50%):
device | cpu0 %tim cpu1 %tim
-------------+------------------------------
ata#0 | 1 0.0 0 0.0
ata#1 | 0 0.0 0 0.0
audiohd#0 | 1 0.0 0 0.0
bge#0 | 0 0.0 2 0.1
ehci#0 | 0 0.0 1 0.0
hci1394#0 | 1 0.0 0 0.0
i915#0 | 0 0.0 2 0.0
pcic#0 | 0 0.0 1 0.0
uhci#0 | 0 0.0 1 0.0
uhci#1 | 1 0.0 0 0.0
uhci#2 | 0 0.0 1 0.1
uhci#3 | 1 0.0 0 0.0
wpi#0 | 0 0.0 2 0.0
Uwe
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