Got hold of some 10Ge cards and did some light benchmarking of kvm networking with and without vhost net accelerator, while enabling x2apic emulation. I've put a summary of results here: http://www.linux-kvm.org/page/VhostNet#Performance Main conclusions: vhost net improves latency (a lot) and bandwidth/cpu utilization (less). With x2apic and a recent guest, virtio userspace has decent bandwidth but high latency and cpu utilization. vhost net bandwidth can get very close to native bandwidth (95%). We still have work to do tuning virtio guest drivers. -- MST -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
