Re: [Xen-devel] xhci_hcd intterrupt affinity in Dom0/DomU limited to single interrupt

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 08.09.15 at 18:02, <ackerj67@xxxxxxxxx> wrote:
> I believe the driver does support use of multiple interrupts based on
> the previous explanation of the lspci output where it was established
> that the device could use up to 8 interrupts which is what I see on bare
> metal.

Where is the proof of that? All I've seen is output like this

    Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+

which says that one out of eight interrupts is being used. And
if in the native case this would indeed be the case, I don't think
you've provided complete hypervisor and kernel logs for the
Xen case so far, which would allow us to look for respective error
indications. And this (ignoring the line wrapping, which makes
things hard to read - it would be appreciated if you could fix
your mail client)...

> Bare metal:
> 
> cat /proc/interrupts 
>            CPU0       CPU1       CPU2       CPU3       CPU4       CPU5
> CPU6       CPU7       
>   0:         36          0          0          0          0          0
> 0          0  IR-IO-APIC-edge      timer
>[...]
>  27:     337125      47893     708965       4049   53940667     263303
> 87847       4958  IR-PCI-MSI-edge      xhci_hcd

... also shows just a single interrupt being in use.

Jan


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