无法将testpmd连接到OVS+DPDK

Question

摘要

我正在尝试使用testpmd作为来自物理NIC的流量的汇，通过OVS和DPDK。

当我运行testpmd时，它失败了。错误信息非常简短，所以我不知道出了什么问题。

如何让testpmd用DPDK连接到OVS中的虚拟端口？

步骤

我主要关注的是这些Mellanox指令。

# 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

那么，对于OVS元素，我试图遵循这些步骤

# 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

然后我运行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

产出如下：

...
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

/usr/local/var/log/openvswitch/ovs-vswitchd.log的底部是

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

失败的原因是什么？

我应该使用dpdkvhostuserclient而不是dpdkvhostuser吗？

我还试过什么

• 在/var/log/messages中查找更多信息--但这只是stdout和stderr的一个副本。
• 重启动
• 查找OVS文档，但它们是别说“原木”

我尝试过更改我的testpmd命令参数。(Docs 这里)

• 摆脱--no-pci。结果是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，这些MAC地址是物理NIC，我已经连接到OVS。
• 删除--auto-start：相同的结果
• --nb-cores=1：相同的结果
• 删除第二个--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。当我添加--port-topology=chained时，最终会出现原来的错误。

其他信息

• DPDK 17.11.4
• OVS 2.10.1
• NIC: Mellanox Connect-X5
• 操作系统: Centos 7.5
• 我的NIC在NUMA节点0上
• 当我运行ip addr时，我看到名为br0的接口具有与物理NIC相同的MAC地址(p3p1，当它绑定到内核时)。

当我运行sudo ovs-vsctl show时我看到

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"}

编辑:添加/usr/local/var/log/openvswitch/ovs-vswitchd.log的内容

Answer 1

1. 事实上，我们需要的是dpdkvhostuser，而不是客户端。
2. OVS options:n_rxq=2中的队列数与testpmd --txq=1中的队列数不匹配。