On Sunday, September 20, 2020 2:47 PM, Patrick O'Callaghan <p...@usb.ve> wrote:

> On Sat, 2020-09-19 at 16:38 +0000, Zir Blazer wrote:
>
> > Note that while MSI Interrupts are always better, in many cases they are 
> > not enabled by default or are broken somehow. I see often in PCI 
> > Passthrough scenarios for Windows with people complaining about some type 
> > of audio stuttering that in many cases gets solved by explicitly enabling 
> > MSI, as the OS or the Drivers appears to not always do so. So even when 
> > using modern OSes legacy PCI Interrupts performance may be important.
>
> Slightly OT: I sometimes get audio stutter on Windows passthrough. How
> do I enable MSI interrupts?

Please have a look at 
https://vfio.blogspot.com/2014/09/vfio-interrupts-and-how-to-coax-windows.html
Or 
https://forums.guru3d.com/threads/windows-line-based-vs-message-signaled-based-interrupts-msi-tool.378044/


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