Was able to easily reproduce this now with just 'iperf -c <ip> -d". When I ran your longer loop before it never seemed to happen. I believe '-n 10' just made it transfer more data, which smoothed over the inequities here.
[ ID] Interval Transfer Bandwidth [ 5] 0.0-10.0 sec 20.5 MBytes 17.1 Mbits/sec [ 4] 0.0-10.0 sec 564 MBytes 471 Mbits/sec I'm not sure there's really a bug here, as opposed to the host cpu doing the best it can to load-balance too much work. I'll re-try with raring now and look for any differences. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1079212 Title: network slow when 2 VMs using virtio net bridged to same pyhs. network device on kvm host To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1079212/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
