Thanks for reporting this bug and helping to make Ubuntu better. Unfortunately your reference links got abbreviated so I was unable to follow them.
Could you please provide a little more information about your particular setup: 1. Which version of Ubuntu are you on? I'm wondering whether the KVM 0.14-rc1 in natty still has this problem. If you're not on natty, I'll ask you to try to reproduce with the latest qemu and kernels (separately and together) so we can try to nail this down. 2. Can you give the full command being executed in both cases (i.e. ps -ef or /proc/$pid/cmdline output)? Since presumably this is being spawned through two layers (by eucalyptus through libvirt), there could be inadvertant bad interactions between some of the options. 3. I'll wait to see output of 2, but will probably want to see the results with the shortest possible hand-made kvm command lines. ** Changed in: qemu-kvm (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in ubuntu. https://bugs.launchpad.net/bugs/723983 Title: virtio-net performance in 10Gbs lan -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs