Unable to connect testpmd to OVS+DPDK - networking

Question

Summary
I'm trying to use testpmd as a sink of traffic from a physical NIC, through OVS with DPDK.
When I run testpmd, it fails. The error message is very brief, so I have no idea what's wrong.
How can I get testpmd to connect to a virtual port in OVS with DPDK ?
Steps
I'm mostly following these Mellanox instructions.
# step 5 - "Specify initial Open vSwitch (OVS) database to use"
export PATH=$PATH:/usr/local/share/openvswitch/scripts
export DB_SOCK=/usr/local/var/run/openvswitch/db.sock
ovsdb-tool create /usr/local/etc/openvswitch/conf.db /usr/local/share/openvswitch/vswitch.ovsschema
ovsdb-server --remote=punix:$DB_SOCK --remote=db:Open_vSwitch,Open_vSwitch,manager_options --pidfile --detach
# step 6 - "Configure OVS to support DPDK ports"
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
# step 7 - "Start OVS-DPDK service"
ovs-ctl --no-ovsdb-server --db-sock="$DB_SOCK" start # what does this do? I forget
# step 8 - "Configure the source code analyzer (PMD) to work with 2G hugespages and NUMA node0"
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-socket-mem="2048,2048" # 2048 = 2GB
# step 9 - "Set core mask to enable several PMDs"
ovs-vsctl --no-wait set Open_vSwitch . other_config:pmd-cpu-mask=0xFF0 # cores 4-11, 4 per NUMA node
# core masks are one's hot. LSB is core 0
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-lcore-mask=0x8 # core 3
# step 10 - there is no step 10 in the doc linked above
# step 11 - Create an OVS bridge
BRIDGE="br0"
ovs-vsctl add-br $BRIDGE -- set bridge br0 datapath_type=netdev
Then for the OVS elements I'm trying to follow these steps
# add physical NICs to bridge, must be named dpdk(\d+)
sudo ovs-vsctl add-port $BRIDGE dpdk0 \
-- set Interface dpdk0 type=dpdk \
options:dpdk-devargs=0000:5e:00.0 ofport_request=1
sudo ovs-vsctl add-port $BRIDGE dpdk1 \
-- set Interface dpdk1 type=dpdk \
options:dpdk-devargs=0000:5e:00.1 ofport_request=2
# add a virtual port to connect to testpmd/VM
# Not sure if I want dpdkvhostuser or dpdkvhostuserclient
sudo ovs-vsctl add-port $BRIDGE dpdkvhostuser0 \
-- \
set Interface dpdkvhostuser0 \
type=dpdkvhostuser \
options:n_rxq=2,pmd-rxq-affinity="0:4,1:6" \
ofport_request=3
sudo ovs-vsctl add-port $BRIDGE dpdkvhostuser1 \
-- \
set Interface dpdkvhostuser1 \
type=dpdkvhostuser \
options:n_rxq=2,pmd-rxq-affinity="0:8,1:10" \
ofport_request=4
# add flows to join interfaces (based on ofport_request numbers)
sudo ovs-ofctl add-flow $BRIDGE in_port=1,action=output:3
sudo ovs-ofctl add-flow $BRIDGE in_port=3,action=output:1
sudo ovs-ofctl add-flow $BRIDGE in_port=2,action=output:4
sudo ovs-ofctl add-flow $BRIDGE in_port=4,action=output:2
Then I run testpmd
sudo -E $DPDK_DIR/x86_64-native-linuxapp-gcc/app/testpmd \
--vdev virtio_user0,path=/usr/local/var/run/openvswitch/dpdkvhostuser0 \
--vdev virtio_user1,path=/usr/local/var/run/openvswitch/dpdkvhostuser1 \
-c 0x00fff000 \
-n 1 \
--socket-mem=2048,2048 \
--file-prefix=testpmd \
--log-level=9 \
--no-pci \
-- \
--port-numa-config=0,0,1,0 \
--ring-numa-config=0,1,0,1,1,0 \
--numa \
--socket-num=0 \
--txd=512 \
--rxd=512 \
--mbcache=512 \
--rxq=1 \
--txq=1 \
--nb-cores=4 \
-i \
--rss-udp \
--auto-start
The output is:
...
EAL: lcore 18 is ready (tid=456c700;cpuset=[18])
EAL: lcore 21 is ready (tid=2d69700;cpuset=[21])
Interactive-mode selected
Auto-start selected
Warning: NUMA should be configured manually by using --port-numa-config and --ring-numa-config parameters along with --numa.
USER1: create a new mbuf pool <mbuf_pool_socket_0>: n=327680, size=2176, socket=0
USER1: create a new mbuf pool <mbuf_pool_socket_1>: n=327680, size=2176, socket=1
Configuring Port 0 (socket 0)
Fail to configure port 0
EAL: Error - exiting with code: 1
Cause: Start ports failed
The bottom of /usr/local/var/log/openvswitch/ovs-vswitchd.log is
2018-11-30T02:45:49.115Z|00026|netdev_dpdk|INFO|vHost Device '/usr/local/var/run/openvswitch/dpdkvhostuser0' has been added on numa node 0
2018-11-30T02:45:49.115Z|00027|dpdk|INFO|VHOST_CONFIG: read message VHOST_USER_SET_VRING_ENABLE
2018-11-30T02:45:49.115Z|00028|dpdk|INFO|VHOST_CONFIG: set queue enable: 1 to qp idx: 0
2018-11-30T02:45:49.115Z|00029|netdev_dpdk|INFO|State of queue 0 ( tx_qid 0 ) of vhost device '/usr/local/var/run/openvswitch/dpdkvhostuser0'changed to 'enabled'
2018-11-30T02:45:49.115Z|00030|dpdk|INFO|VHOST_CONFIG: read message VHOST_USER_SET_VRING_ENABLE
2018-11-30T02:45:49.115Z|00031|dpdk|INFO|VHOST_CONFIG: set queue enable: 1 to qp idx: 1
2018-11-30T02:45:49.278Z|00032|dpdk|ERR|VHOST_CONFIG: recvmsg failed
2018-11-30T02:45:49.279Z|00033|dpdk|INFO|VHOST_CONFIG: vhost peer closed
2018-11-30T02:45:49.280Z|00034|netdev_dpdk|INFO|vHost Device '/usr/local/var/run/openvswitch/dpdkvhostuser0' has been removed
What is the cause of the failure?
Should I use a dpdkvhostuserclient instead of dpdkvhostuser ?
What else I've tried
Looking in /var/log/messages for more info - but that's just a copy of stdout and stderr.
Rebooting
Looking up the OVS docs, but they don't mention "logs"
I've tried changing my testpmd command arguments. (Docs here)
Getting rid of --no-pci. The result is
Configuring Port 0 (socket 0)
Port 0: 24:8A:07:9E:94:94
Configuring Port 1 (socket 0)
Port 1: 24:8A:07:9E:94:95
Configuring Port 2 (socket 0)
Fail to configure port 2
EAL: Error - exiting with code: 1
Cause: Start ports failed
Those MAC addresses are for the physical NICs I've already connected to OVS.
Removing --auto-start: same result
--nb-cores=1: same result
Removing the 2nd --vdev: Warning! Cannot handle an odd number of ports with the current port topology. Configuration must be changed to have an even number of ports, or relaunch application with --port-topology=chained. When I add --port-topology=chained I end up with the original error.
Other Info
DPDK 17.11.4
OVS 2.10.1
NIC: Mellanox Connect-X5
OS: Centos 7.5
My NIC is on NUMA node 0
When I run ip addr I see that an interface called br0 has the same MAC address as my physical NICs (p3p1, when it was bound to the kernel)
When I run sudo ovs-vsctl show I see
d3e721eb-6aeb-44c0-9fa8-5fcf023008c5
Bridge "br0"
Port "dpdkvhostuser1"
Interface "dpdkvhostuser1"
type: dpdkvhostuser
options: {n_rxq="2,pmd-rxq-affinity=0:8,1:10"}
Port "dpdk1"
Interface "dpdk1"
type: dpdk
options: {dpdk-devargs="0000:5e:00.1"}
Port "dpdk0"
Interface "dpdk0"
type: dpdk
options: {dpdk-devargs="0000:5e:00.0"}
Port "br0"
Interface "br0"
type: internal
Port "dpdkvhostuser0"
Interface "dpdkvhostuser0"
type: dpdkvhostuser
options: {n_rxq="2,pmd-rxq-affinity=0:4,1:6"}
Edit: Added contents of /usr/local/var/log/openvswitch/ovs-vswitchd.log

Answer 1

Indeed, we need dpdkvhostuser, not client.
The number of queues is mismatch in OVS options:n_rxq=2 vs testpmd --txq=1.