Introduction

This note is about device passthrough in KVM. Idealy, device passthrough will give you near-native performance in the VMs.

Basic idea

1. Devices in the same IOMMU group should be passed through to the VM together.

2. Devices on the same physical board should (better) be passed through together.

   • This is especially true for NVIDIA graphics card where there are video and audio (and even usb controller for newer models) on the same board. And their …