[Ccing qemu-devel and kvm] "Boylan, Ross" <Ross.Boylan@xxxxxxxx> writes: > Running a Windows 7 VM under KVM, with virtio drivers, the networking was so slow as to be non-functional. > As suggested in comment 11 of https://bugzilla.redhat.com/show_bug.cgi?id=855640, I did ethtool -K eth1 gro off and speeds got much better, ~150Mb/s, although using speedtest.net it was unable to connect to the server for the upload test. > > However, ssh in to the host machine, or to linux VM's running on the same host, became extremely erratic (prone to dropped connections) and slow after making these changes. I was connected via sshuttle for VPN. > > Does anyone have any suggestions? > I would appreciate a cc. > > Thanks. > Ross Boylan > > Details: > Host is running Debian wheezy on amd64. Using virt-manager > libvirt > kvm and bridged networking. > Linux markov00 3.2.0-4-amd64 #1 SMP Debian 3.2.65-1+deb7u2 x86_64 GNU/Linux > Here's one of the network specifications for libvirt: > <interface type='direct'> > <mac address='52:54:00:61:xxxx'/> > <source dev='eth1' mode='vepa'/> > <model type='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> > </interface> > > The Windows drivers came from http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/virtio-win-0.1-100.iso in the 32 bit windows 7 directory of the iso (host is 64 bit, as is the emulated machine; Windows 7 is 32 bit). -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- 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
