[ovs-dev] Multiqueue in vhost using OVS-DPDK

[Ravi Kerur]

On Wed, Jul 11, 2018 at 11:32 AM Ian Stokes <ian.stokes at intel.com> wrote:

> On 7/11/2018 7:23 PM, Ian Stokes wrote:
> > On 7/11/2018 7:02 PM, Ravi Kerur wrote:
> >> Hello OVS-DPDK team,
> >>
> >> I am using OVS 2.9.90 for my vhost-virtio testing and had some
> >> questions on
> >> vhost multiqueue support, it doesn't seem to be working correctly.
> Kindly
> >> let me know if multiqueue is supported? I am using following link as a
> >> reference.
> >>
> >>
> https://software.intel.com/en-us/articles/configure-vhost-user-multiqueue-for-ovs-with-dpdk
> >>
> >>
> >
> > Hi Ravi, that document was wrote for OVS 2.5 and DPDK 2.2. There have
> > been a number of changes since then. I'll need to update it.
> >
> > I would suggest following the ovs docs
> >
> >
> http://docs.openvswitch.org/en/latest/topics/dpdk/vhost-user/#adding-vhost-user-ports-to-the-guest-qemu
> >
> >
> > specifically the section for multi queue as it describes the options
> > required.
> >
> >> ovs-vswitchd --version
> >> ovs-vswitchd (Open vSwitch) 2.9.90
> >> DPDK 17.11.2
> >> ovs-vsctl get Open_vSwitch . dpdk_version
> >> "DPDK 17.11.2"
> >> ovs-vsctl get Open_vSwitch . dpdk_initialized
> >> true
> >>
> >> ovs-vsctl set Interface vhost-user-0 options:n_rxq=2
> >> ovs-vsctl set Interface vhost-user-0 options:n_txq=2
> >> ovs-vsctl set Interface vhost-user-1 options:n_rxq=2
> >> ovs-vsctl set Interface vhost-user-1 options:n_txq=2
> >
> > You do not need to set the number of rxqs for vhost devices now in OVS
> > DPDK. This is set automatically when you launch a guest vm.
> >
> > Txqs are autmatically set by ovs dpdk also (it's the numbers of PMDs in
> > the core mask +1) so no need to set it here.
> >
> > You only need to set the number of rxqs if you were using multiple ports
> > on a physical dpdk port.
>
> Apologies, I meant multiple queues on a physical dpdk port.
>

Thank you Ian. Let me go through the document and get back to you if I have
any questions.

>
> Ian
> >
> > Ian
> >>
> >> I see following messages in openvswitch logs
> >> 2018-07-11T17:13:54.644Z|00210|netdev|WARN|vhost-user-1: arguments
> >> provided
> >> to device that is not configurable
> >> 2018-07-11T17:13:57.514Z|00211|netdev|WARN|vhost-user-0: arguments
> >> provided
> >> to device that is not configurable
> >> 2018-07-11T17:13:57.514Z|00212|netdev|WARN|vhost-user-1: arguments
> >> provided
> >> to device that is not configurable
> >> 2018-07-11T17:13:57.516Z|00213|netdev|WARN|vhost-user-0: arguments
> >> provided
> >> to device that is not configurable
> >> 2018-07-11T17:13:57.516Z|00214|netdev|WARN|vhost-user-1: arguments
> >> provided
> >> to device that is not configurable
> >> 2018-07-11T17:13:57.517Z|00215|netdev|WARN|vhost-user-0: arguments
> >> provided
> >> to device that is not configurable
> >> 2018-07-11T17:13:57.517Z|00216|netdev|WARN|vhost-user-1: arguments
> >> provided
> >> to device that is not configurable
> >> ...
> >>
> >> ovs-appctl dpctl/show
> >> netdev at ovs-netdev:
> >>    lookups: hit:89395441 missed:216 lost:0
> >>    flows: 0
> >>    port 0: ovs-netdev (tap)
> >>    port 1: br0 (tap)
> >>    *port 2: vhost-user-0 (dpdkvhostuser: configured_rx_queues=1,
> >> configured_tx_queues=1, mtu=9000, requested_rx_queues=1,
> >> requested_tx_queues=1)*
> >>    port 3: dpdk-eth0 (dpdk: configured_rx_queues=2,
> >> configured_rxq_descriptors=1024, configured_tx_queues=5,
> >> configured_txq_descriptors=1024, lsc_interrupt_mode=false, mtu=9000,
> >> requested_rx_queues=2, requested_rxq_descriptors=1024,
> >> requested_tx_queues=5, requested_txq_descriptors=1024,
> >> rx_csum_offload=false)
> >>    *port 4: vhost-user-1 (dpdkvhostuser: configured_rx_queues=1,
> >> configured_tx_queues=1, mtu=9000, requested_rx_queues=1,
> >> requested_tx_queues=1)*
> >>    port 5: dpdk-eth1 (dpdk: configured_rx_queues=2,
> >> configured_rxq_descriptors=1024, configured_tx_queues=5,
> >> configured_txq_descriptors=1024, lsc_interrupt_mode=false, mtu=9000,
> >> requested_rx_queues=2, requested_rxq_descriptors=1024,
> >> requested_tx_queues=5, requested_txq_descriptors=1024,
> >> rx_csum_offload=false)
> >>    port 6: br1 (tap)
> >>
> >> Thanks.
> >> _______________________________________________
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> >> dev at openvswitch.org
> >> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
> >>
> >
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