DPDK无法检测到以太网端口

Question

我已经安装了F-stack的DPDK（v20.11.0），并将NIC绑定到IGB_UIO驱动程序。 dpdk-devbind.py的输出可以帮助验证它：

Network devices using DPDK-compatible driver
============================================
0000:04:00.0 'I210 Gigabit Network Connection 1533' drv=igb_uio unused=igb,vfio-pci,uio_pci_generic
0000:05:00.0 'I210 Gigabit Network Connection 1533' drv=igb_uio unused=igb,vfio-pci,uio_pci_generic
0000:af:00.0 'Ethernet Controller X710/X557-AT 10GBASE-T 1589' drv=igb_uio unused=i40e,vfio-pci,uio_pci_generic

Network devices using kernel driver
===================================
0000:1a:00.0 'Ethernet Connection X722 for 10GBASE-T 37d2' if=enp26s0f0 drv=i40e unused=igb_uio,vfio-pci,uio_pci_generic *Active*
0000:1a:00.1 'Ethernet Connection X722 for 10GBASE-T 37d2' if=enp26s0f1 drv=i40e unused=igb_uio,vfio-pci,uio_pci_generic *Active*
0000:af:00.1 'Ethernet Controller X710/X557-AT 10GBASE-T 1589' if=enp175s0f1 drv=i40e unused=igb_uio,vfio-pci,uio_pci_generic *Active*
0000:af:00.2 'Ethernet Controller X710/X557-AT 10GBASE-T 1589' if=enp175s0f2 drv=i40e unused=igb_uio,vfio-pci,uio_pci_generic *Active*
0000:af:00.3 'Ethernet Controller X710/X557-AT 10GBASE-T 1589' if=enp175s0f3 drv=i40e unused=igb_uio,vfio-pci,uio_pci_generic *Active*

但是，当我从该DPDK目录进行一些测试时，例如basicffwd，它会返回一个错误，说必须是port <>甚至。然后，我检查了RTE_ETH_DEV_COUNT_AVAIL的返回值，并且是0。

$ sudo ./basicfwd -l 1 -n 4
EAL: Detected 72 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: No available hugepages reported in hugepages-1048576kB
EAL: Probing VFIO support...
EAL: VFIO support initialized
EAL: No legacy callbacks, legacy socket not created
EAL: Error - exiting with code: 1
  Cause: Error: number of ports must be even

这甚至很奇怪，即测试-PMD的输出似乎可以检测到我的NICS？

EAL: Detected 72 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: No available hugepages reported in hugepages-1048576kB
EAL: Probing VFIO support...
EAL: VFIO support initialized
EAL: Probe PCI driver: net_e1000_igb (8086:1533) device: 0000:04:00.0 (socket 0)
EAL: Probe PCI driver: net_e1000_igb (8086:1533) device: 0000:05:00.0 (socket 0)
EAL: Probe PCI driver: net_i40e (8086:1589) device: 0000:af:00.0 (socket 1)
EAL: No legacy callbacks, legacy socket not created
testpmd: create a new mbuf pool <mb_pool_0>: n=715456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
testpmd: create a new mbuf pool <mb_pool_1>: n=715456, size=2176, socket=1
testpmd: preferred mempool ops selected: ring_mp_mc

Warning! port-topology=paired and odd forward ports number, the last port will pair with itself.

Configuring Port 0 (socket 0)
Port 0: 74:FE:48:4D:99:E8
Configuring Port 1 (socket 0)
Port 1: 74:FE:48:4D:99:E9
Configuring Port 2 (socket 1)
Port 2: 3C:FD:FE:83:4A:18
Checking link statuses...
Done
No commandline core given, start packet forwarding
io packet forwarding - ports=3 - cores=1 - streams=3 - NUMA support enabled, MP allocation mode: native
Logical Core 1 (socket 0) forwards packets on 3 streams:
  RX P=0/Q=0 (socket 0) -> TX P=1/Q=0 (socket 0) peer=02:00:00:00:00:01
  RX P=1/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00
  RX P=2/Q=0 (socket 1) -> TX P=2/Q=0 (socket 1) peer=02:00:00:00:00:02

  io packet forwarding packets/burst=32
  nb forwarding cores=1 - nb forwarding ports=3
  port 0: RX queue number: 1 Tx queue number: 1
    Rx offloads=0x0 Tx offloads=0x0
    RX queue: 0
      RX desc=512 - RX free threshold=32
      RX threshold registers: pthresh=0 hthresh=0  wthresh=0
      RX Offloads=0x0
    TX queue: 0
      TX desc=512 - TX free threshold=0
      TX threshold registers: pthresh=8 hthresh=1  wthresh=16
      TX offloads=0x0 - TX RS bit threshold=0
  port 1: RX queue number: 1 Tx queue number: 1
    Rx offloads=0x0 Tx offloads=0x0
    RX queue: 0
      RX desc=512 - RX free threshold=32
      RX threshold registers: pthresh=0 hthresh=0  wthresh=0
      RX Offloads=0x0
    TX queue: 0
      TX desc=512 - TX free threshold=0
      TX threshold registers: pthresh=8 hthresh=1  wthresh=16
      TX offloads=0x0 - TX RS bit threshold=0
  port 2: RX queue number: 1 Tx queue number: 1
    Rx offloads=0x0 Tx offloads=0x10000
    RX queue: 0
      RX desc=256 - RX free threshold=32
      RX threshold registers: pthresh=0 hthresh=0  wthresh=0
      RX Offloads=0x0
    TX queue: 0
      TX desc=256 - TX free threshold=32
      TX threshold registers: pthresh=32 hthresh=0  wthresh=0
      TX offloads=0x10000 - TX RS bit threshold=32
Press enter to exit

我怀疑这可能是F-stack的问题，因为如果我尝试使用最新版本的DPDK，它可以检测到我的NIC。

谁能帮助找到我的环境中可能出了什么问题？任何帮助将不胜感激。

Answer 1

根据DPDK-DEVBIND共享的日志，您在DPDK中标识了3个NIC端口，例如

Network devices using DPDK-compatible driver
============================================
0000:04:00.0 'I210 Gigabit Network Connection 1533' drv=igb_uio unused=igb,vfio-pci,uio_pci_generic
0000:05:00.0 'I210 Gigabit Network Connection 1533' drv=igb_uio unused=igb,vfio-pci,uio_pci_generic
0000:af:00.0 'Ethernet Controller X710/X557-AT 10GBASE-T 1589' drv=igb_uio unused=i40e,vfio-pci,uio_pci_generic

DPDK示例骨架，它可以在2、4、6、8、8，...的一对端口上工作。因此，运行时 则将有2个结果（带有实际选项-d未传递）

1. 应用程序sudo ./basicfwd -l 1 -l 1 -n 4如果使用make clean state static static static static， ；使静态应用程序看到3个端口。
2. 如果与共享的构建使清洁；制作应用程序将看到0个端口，

因此要解决问题，您有3个选项

1. 添加1个额外的NIC或虚拟（-vdev = net_tap0）
2. 或通过-B 0000： AF：00.0或通过从dev-bind中删除
3. 或通过-A 0000：04：00.0.0 -a 0000：05：00.0：00.0

注意：如果您有共享库的构建，则模式，您还需要传递适当的PMD驱动程序，以便为basicfwd而成功。您可以轻松识别这一点，因为在日志（-log-level = pmd，8）中根本有PCI设备探针。

Answer 2

根据dpdk-devbind输出，有三个 nics绑定到与DPDK兼容的驱动程序。当一个人（使用-a eal参数）未明确指定哪个nics时，EAL会发现所有上述NIC 甚至。

为了解决有关的问题，请考虑运行basicfwd，如下：

sudo ./basicfwd -l 1 -n 4 -a 0000:04:00.0 -a 0000:05:00.0