On Sat, Nov 21, 2015 at 8:56 AM, Jeremy Jongepier <jeremy@autostatic.com> wrote:

On 11/21/2015 02:40 PM, Ede Wolf wrote:
> Following the discussion about irq_balance, I was having a look at my
> interrupts, I figured that my most important devices all share a single
> one:
>
>
> cat /proc/interrupts:
>
> 20: <CPU List> IR-IO-APIC 20-fasteoi ohci_hcd:usb9, snd_rme9652,
> vfio-intx(0000:07:00.0)
>
> So some USB, my passed-through parallel card and my soundcard are all
> sharing interrupt #20.
>
> Now I wonder, is there a way to force the system to use a dedicated
> interrupt just for the soundcard?

No, unless the system supports MSI (Message Signaled Interrupts) and the
sound card could use that. It's been a while since I had to use that so
I have no links at hand :(

Actually, it depends on the BIOS in your motherboard.

In general, most laptops and many newer motherboards do not allow interrupt/slot assignment to be controlled.

Most older desktop-y motherboards and a few contemporary ones do.

If you can't find it in the BIOS setup stuff, then it probably isn't there.