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?