[ovs-discuss] [OVS-DPDK] vhost-user with multiple queues does not work

[Loftus, Ciara]

> 
> Hi,
> 
> when configuring OVS vhost-user interfaces with multiple queues like so:
> 
> ovs-vsctl set Interface vhost-user-0 options:n_rxq=2
> ovs-vsctl set Interface vhost-user-1 options:n_rxq=2
> 
> i get the following warnings when starting ovs-vswitchd:
> 
> 2016-04-04T08:53:28Z|00038|netdev|WARN|vhost-user-0: arguments
> provided to device that is not configurable
> 2016-04-04T08:53:28Z|00039|netdev|WARN|vhost-user-1: arguments
> provided to device that is not configurable
> 
> The guest vm also does not have multiple queues enabled as they are not set
> in ovs.
> Im using OVS 2.5 from git -> branch-2.5 -> commit
> e099c86ca432d1daeaf8edb66225e7edf061c0b0

Hi,

If you are using branch-2.5 you cannot use the n_rxq field. Instead you need to set multiple queues like so:
ovs-vsctl set Open_vSwitch . other_config:n-dpdk-rxqs=4

This sets the number of rxqs for all devices to 4.

Thanks,
Ciara

> 
> Someone had a similar issue or knows a fix?
> 
> Best regards
> Felix