* Chris Wright (chrisw@xxxxxxxxxxxx) wrote: > * Pete Ashdown (pashdown@xxxxxxxxxxxx) wrote: > > ProxMox guest: > > /usr/bin/kvm -monitor unix:/var/run/qemu-server/104.mon,server,nowait -vnc unix:/var/run/qemu-server/104.vnc,password -pidfile /var/run/qemu-server/104.pid -daemonize -usbdevice tablet -name UbuntuServer -smp sockets=2,cores=2 -nodefaults -boot menu=on -vga cirrus -tdf -k en-us -drive file=/var/lib/vz/images/104/vm-104-disk-2.raw,if=ide,index=3 -drive file=/var/lib/vz/images/104/vm-104-disk-1.raw,if=virtio,index=0,boot=on -m 1024 -net tap,vlan=0,ifname=vmtab104i0,script=/var/lib/qemu-server/bridge-vlan -net nic,vlan=0,model=virtio,macaddr=76:3F:1A:03:6D:6F > > > > Ubuntu guest: > > /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 1024 -smp 1 -name ubutest -uuid c0537369-fffa-9680-2f29-2e0cc0406561 -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/ubutest.monitor,server,nowait -monitor chardev:monitor -boot c -drive file=/dev/vg/ubutest,if=virtio,index=0,boot=on -net nic,macaddr=52:54:00:35:11:f1,vlan=0,model=virtio,name=virtio.0 -net tap,fd=51,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0 -parallel none -usb -vnc 0.0.0.0 > > Not sure what userspace you are using, but you are probably not getting > any of the useful offload features set. Checking "ethtool -k $ETH" > in the guest will verify that. > > Try changing this: > > -net nic,macaddr=52:54:00:35:11:f1,vlan=0,model=virtio,name=virtio.0 \ > -net tap,fd=51,vlan=0,name=tap.0 > > to use newer syntax: > > -netdev type=tap,id=netdev0 > -device virtio-net-pci,mac=52:54:00:35:11:f1,netdev=netdev0 > > With just a 1Gb link, you should see line rate from guest via virtio. Just to follow-up for the archives. Pete replied offlist that using the above cmdline eliminates the performance issue. thanks, -chris -- 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
