virtualization – unbalanced IRQs in virtual devices

I noticed on the top of my linux server that one CPU had a much larger number of software interrupts than all the other 7 cores. Digging further, I noticed that this kernel is anchored to a particular irq that turns out to be a virtio device. Infact each core has an affinity towards a particular virtio device

virtio0-config
virtio0 control
virtio0 event
virtio0 application
virtio2-config
virtio2-input.0
virtio2-output.0
virtio3-config
virtio3-input.0
virtio3-output.0
virtio4-config
virtio4-input.0
virtio4-output.0

In this list, virtio4-input.0 has, in particular, a very high number of interruptions and I can not find out what is special about this particular device. any track will be very useful. The machine in question is a nutanix VM running on a Linux host.