Mr. Ferber, much appreciated. I knew this metal box came to me with two mellanox NICs bonded. I used their util to unbond it, but alas it did not do it all the way. The /etc/network/interfaces was bad. I fixed the config and rebooted. Voila. Success. ibv_devinfo now shows two devices. And the DPDK app runs. Your point about bonding nudged me to double check. *Now, on a second machine where I believe I have done everything I did on the first machine*, running the DPDK application continues to look for the wrong driver: EAL: Detected CPU lcores: 16 EAL: Detected NUMA nodes: 1 EAL: Detected shared linkage of DPDK EAL: libmlx4.so.1: cannot open shared object file: No such file or directory EAL: FATAL: Cannot init plugins EAL: Cannot init plugins Somehow I fixed this on the first machine, but I cannot duplicate success on the second machine. Both machines report two devices; both machines show similar ifconifgs device node GUID ------ ---------------- mlx5_0 0c42a103007ea9b8 mlx5_1 0c42a103007ea9b9 device node GUID ------ ---------------- mlx5_0 0c42a103007ea3ec mlx5_1 0c42a103007ea3ed root@server:~/Dev/reinvent/scripts# ibv_devinfo hca_id: mlx5_0 transport: InfiniBand (0) fw_ver: 14.32.1010 node_guid: 0c42:a103:007e:a3ec sys_image_guid: 0c42:a103:007e:a3ec vendor_id: 0x02c9 vendor_part_id: 4117 hw_ver: 0x0 board_id: MT_2420110034 phys_port_cnt: 1 port: 1 state: PORT_ACTIVE (4) max_mtu: 4096 (5) active_mtu: 1024 (3) sm_lid: 0 port_lid: 0 port_lmc: 0x00 link_layer: Ethernet hca_id: mlx5_1 transport: InfiniBand (0) fw_ver: 14.32.1010 node_guid: 0c42:a103:007e:a3ed sys_image_guid: 0c42:a103:007e:a3ec vendor_id: 0x02c9 vendor_part_id: 4117 hw_ver: 0x0 board_id: MT_2420110034 phys_port_cnt: 1 port: 1 state: PORT_ACTIVE (4) max_mtu: 4096 (5) active_mtu: 1024 (3) sm_lid: 0 port_lid: 0 port_lmc: 0x00 link_layer: Ethernet ibv_devinfo hca_id: mlx5_0 transport: InfiniBand (0) fw_ver: 14.32.1010 node_guid: 0c42:a103:007e:a9b8 sys_image_guid: 0c42:a103:007e:a9b8 vendor_id: 0x02c9 vendor_part_id: 4117 hw_ver: 0x0 board_id: MT_2420110034 phys_port_cnt: 1 port: 1 state: PORT_ACTIVE (4) max_mtu: 4096 (5) active_mtu: 1024 (3) sm_lid: 0 port_lid: 0 port_lmc: 0x00 link_layer: Ethernet hca_id: mlx5_1 transport: InfiniBand (0) fw_ver: 14.32.1010 node_guid: 0c42:a103:007e:a9b9 sys_image_guid: 0c42:a103:007e:a9b8 vendor_id: 0x02c9 vendor_part_id: 4117 hw_ver: 0x0 board_id: MT_2420110034 phys_port_cnt: 1 port: 1 state: PORT_ACTIVE (4) max_mtu: 4096 (5) active_mtu: 1024 (3) sm_lid: 0 port_lid: 0 port_lmc: 0x00 link_layer: Ethernet On Tue, Apr 5, 2022 at 1:00 PM Erez Ferber wrote: > Hi, > > Based on your output, the ConnectX-4LX device is configured in LAG mode > managed via the kernel bonding scripts. In this mode, both physical > functions share a single port (mlx5_bond_0). You should only probe the > first PCI BDF - 01:00.0, not the 2nd one. > > By the way, the --dpdk installation flag should not be necessary, it is an > old flag keps for Mellanox OFED builds lower than 5.x. > > Regards, > Erez > > On Tue, 5 Apr 2022 at 19:17, fwefew 4t4tg <7532yahoo@gmail.com> wrote: > >> I built the current version of DPDK directly from dpdk.org after I >> installed the current OFED Mellanox driver set: >> >> * MLNX_OFED_LINUX-5.5-1.0.3.2-ubuntu20.04-x86_64.iso >> >> with ./install --dpdk >> >> I am using a Mellanox Technologies MT27710 Family [ConnectX-4 Lx] which >> is Ethernet only; there is no IB mode for this NIC. This is a MT_2420110034 >> board. However, when I run dpdk-testpmd I see "No Verbs device matches PCI >> device 0000:01:00.1, are kernel drivers loaded?" >> >> EAL: Detected CPU lcores: 16 >> EAL: Detected NUMA nodes: 1 >> EAL: Detected static linkage of DPDK >> EAL: Selected IOVA mode 'PA' >> EAL: No free 2048 kB hugepages reported on node 0 >> EAL: VFIO support initialized >> EAL: Probe PCI driver: mlx5_pci (15b3:1015) device: 0000:01:00.1 (socket >> 0) >> mlx5_common: No Verbs device matches PCI device 0000:01:00.1, are kernel >> drivers loaded? >> mlx5_common: Verbs device not found: 01:00.1 >> mlx5_common: Failed to initialize device context. >> EAL: Requested device 0000:01:00.1 cannot be used >> EAL: Bus (pci) probe failed. >> >> As far as I can see all the kernel modules are loaded: >> >> lsmod | egrep "(ib|mlx)" | sort >> ib_cm 53248 2 rdma_cm,ib_ipoib >> ib_core 368640 8 >> rdma_cm,ib_ipoib,iw_cm,ib_umad,rdma_ucm,ib_uverbs,mlx5_ib,ib_cm >> ib_ipoib 135168 0 >> ib_umad 24576 0 >> ib_uverbs 139264 2 rdma_ucm,mlx5_ib >> libahci 36864 1 ahci >> libcrc32c 16384 2 btrfs,raid456 >> mlx5_core 1634304 1 mlx5_ib >> mlx5_ib 397312 0 >> mlx_compat 69632 11 >> rdma_cm,ib_ipoib,mlxdevm,iw_cm,ib_umad,ib_core,rdma_ucm,ib_uverbs,mlx5_ib,ib_cm,mlx5_core >> mlxdevm 172032 1 mlx5_core >> mlxfw 32768 1 mlx5_core >> pci_hyperv_intf 16384 1 mlx5_core >> psample 20480 1 mlx5_core >> tls 94208 2 bonding,mlx5_core >> >> root@dc-c3-small-x86-01:~/Dev/reinvent/scripts# mst status -v >> MST modules: >> ------------ >> MST PCI module is not loaded >> MST PCI configuration module loaded >> PCI devices: >> ------------ >> DEVICE_TYPE MST PCI RDMA >> NET NUMA >> ConnectX4LX(rev:0) /dev/mst/mt4117_pciconf0.1 01:00.1 >> mlx5_bond_0 net-bond0 -1 >> >> ConnectX4LX(rev:0) /dev/mst/mt4117_pciconf0 01:00.0 >> mlx5_bond_0 net-bond0 -1 >> >