cat /proc/interrupts

[Len Brown]

On Thursday 14 February 2008 01:12, Justin Mattock wrote:
> Hello; I'm concerned with my cat /proc/interrupts, I'm not seeing any
> interrupts  for timer on cpu1, Rescheduling interrupts is there, and the
> local timer, is this normal;
> im using nubuntu on a macbook pro 15'(the mac with ati no powerplay support)
> kernel 2.6.25-rc1;
> 
> 
>              CPU0       CPU1
>   0:      885432              0   IO-APIC-edge      timer            <--?
>   9:        94702              0   IO-APIC-fasteoi   acpi
>  14:            88               0   IO-APIC-edge      ata_piix
>  15:              0               0   IO-APIC-edge      ata_piix
> <--is this a phantom wakeup?
>  16:   1016525              0   IO-APIC-fasteoi   uhci_hcd:usb4
>  17:     319692              0   IO-APIC-fasteoi   wifi0
>  18:             37              0   IO-APIC-fasteoi   uhci_hcd:usb3
>  19:       13136              0   IO-APIC-fasteoi   ata_piix, uhci_hcd:usb2
>  22:     408499              0   IO-APIC-fasteoi   HDA Intel
>  23:         4709              0   IO-APIC-fasteoi   uhci_hcd:usb1
> NMI:            0              0   Non-maskable interrupts
> LOC:    34600    865484   Local timer interrupts
> RES:  861474  1146784   Rescheduling interrupts
> CAL:           45          111   function call interrupts
> TLB:       2306        2008   TLB shootdowns
> TRM:            0              0   Thermal event interrupts
> SPU:            0               0   Spurious interrupts
> ERR:            0
> MIS:             0
> 
> 
> Am I missing something for IO-APIC in my kernel config?

no, you're fine.
the timer doesn't have to go to each cpu.
in fact, it is being re-distributed to the LOC vector
because the actual LOC timer is disabled in C3 on this system.

cheers,
-len