Re: [libvirt-users] Strange QoS behavior

On 03.12.2012 16:37, Davide Guerri wrote: > Hi, > I'm having some weird problem with the setup of the QoS on a bridged network. > > As the docs states, outbound/inbound average speed should be expressed in KBps (KBytes per second) but in order to get a maximum speed of 10Mbps (megabits per second) surprising enough I have to use 2560 on the guest (not 1280 as expected). > Using 1280 units I get a speed og 5Mbps. > > I'm aware of peak and burst parameters but even with them I'm seeing the same (long-term) behavior. > > Here follows my configuration. > > Thank you in advance for any help you can provide. > > > > Domain definition (relevant part only) > > virsh # dumpxml mydomain > <domain type='kvm' id='45'> > [...] > <devices> > [...] > <interface type='network'> > <mac address='52:54:00:xx:xx:xx'/> > <source network='br909'/> > <target dev='vnet43'/> > <model type='virtio'/> > <bandwidth> > <inbound average='2560'/> > <outbound average='2560'/> > </bandwidth> > <alias name='net0'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> > </interface> > [...] > </devices> > </domain> > > > The network definition: > virsh # net-dumpxml br909 > <network> > <name>br909</name> > <uuid>07319380-2025-cdcc-924a-149cd0370b56</uuid> > <forward mode='bridge'/> > <bridge name='br909' /> > </network> > > > And iperf result (client and server are on the same vlan and they are running on the same host) > > [ 5] local xx.xx.xx.xx port 5001 connected with xx.xx.xx.yy port 18396 > [ 5] 0.0-30.1 sec 35.4 MBytes 9.87 Mbits/sec Hm, strange. What does: tc class show dev vnet43 tc filter show dev vnet43 tc qdisc show dev vnet43 show?