Re: [Xen-devel] [PATCH] xen: implement vector callback for evtchn delivery

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Thu, 27 May 2010, Boris Derzhavets wrote:
> root@LucidSRV:~# cat /proc/interrupts
>            CPU0       CPU1      
>   0:         29          0   IO-APIC-edge      timer
>   1:        107          0   IO-APIC-edge      i8042
>   4:          1          0   IO-APIC-edge   
>   6:          2          0   IO-APIC-edge      floppy
>   8:          0          0   IO-APIC-edge      rtc0
>   9:          0          0   IO-APIC-fasteoi   acpi
>  12:        187        496   IO-APIC-edge      i8042
>  14:          0          0   IO-APIC-edge      ata_piix
>  15:        933          0   IO-APIC-edge      ata_piix
>  16:        293          0   xen-dyn-event     xenbus
>  17:       5059          0   xen-dyn-event     blkif
>  18:          0          0   xen-dyn-event     blkif
>  19:         72          0   xen-dyn-event     eth0
>  23:          0          0   IO-APIC-fasteoi   uhci_hcd:usb1
>  36:          0          0   IO-APIC-fasteoi   Ensoniq AudioPCI
> NMI:          0          0   Non-maskable interrupts
> LOC:       2767       2901   Local timer interrupts
> SPU:          0          0   Spurious interrupts
> PMI:          0          0   Performance monitoring interrupts
> PND:          0          0   Performance pending work
> PLT:       5211          0   Platform interrupts
> RES:       1189       1949   Rescheduling interrupts
> CAL:        130         89   Function call interrupts
> TLB:        230        179   TLB shootdowns
> TRM:          0          0   Thermal event interrupts
> THR:          0          0   Threshold APIC interrupts
> MCE:          0          0   Machine check exceptions
> MCP:          1          1   Machine check polls
> ERR:          0
> MIS:          0
> 

You definitely have the vector callback enabled.
I am not sure why you receive so many ata_piix interrupts given that you
shouldn't be using the emulated disk at all.
Maybe you are reading from an emulated cdrom?

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