The only way IOMMU will help is if you start assigning HW resources directly to the VM. Just having it available doesn't make things faster. It would help to know exactly what Motherboard/CPU is advertising this feature. IOMMU is a system specific IO mapping mechanism and…

I run XenServer in a network engineering environment running several security gateways. Have been running for two years now. Works great for a fully functional free virtualization system. Very solid system.