Re: How to simulate a device which generates an interrupt every 8.3 ms

[Peter Maydell]

On Thu, 10 Dec 2020 at 05:28, Weiss, Howard <Howard.Weiss2@hologic.com> wrote:
>
> Hi –
>
>
>
> I am writing a Windows 10 device driver which receives an interrupt from 
> hardware every 8.3 ms.  I am simulating the hardware device in a linux 
> QEMU/KVM VM with Windows 10 installed.  How do I program my simulated device 
> to generate an interrupt every 8.3 ms? Under windows, I would generate a high 
> resolution timer interrupt using the windows multi-media API.  What is the 
> QEMU/KVM equivalent?

Use a QEMUTimer. You can set the expiry period in nanoseconds.
Note that you should probably not expect QEMU's timing to be
accurate to exactly 8.3ms.

thanks
-- PMM