Hi all, I have a server running VMWare ESXi 5.5.0 and VMWare vCenter 5.5.0. On such server I created a VM with two VMXNET3 NIC cards (one for management, the other one should be used with DPDK to enable fast-RX of packets coming from other VMs / bare-metal NICs).
Inside the VM I have successfully created 2MB hugepages, loaded igb_uio driver and binded the 2nd VMXNET3 NIC to igb_uio driver: ---------------------------------------------------------------------------------------------------------------------- $ ./dpdk_nic_bind.py --status Network devices using DPDK-compatible driver ============================================ 0000:0b:00.0 'VMXNET3 Ethernet Controller' drv=igb_uio unused=vmxnet3 Network devices using kernel driver =================================== 0000:03:00.0 'VMXNET3 Ethernet Controller' if=eth0 drv=vmxnet3 unused=igb_uio *Active* Other network devices ===================== <none> ---------------------------------------------------------------------------------------------------------------------- However when I start my DPDK-application I get the following error during TX queue initialization: ERR rte_eth_tx_queue_setup: err=-22, port=0: Unknown error -22 This is the code that I'm using: ... rte_eth_dev_info_get(m_portid, m_dev_info); // proceed with configuration struct rte_eth_conf port_conf; memset(&port_conf, 0, sizeof(port_conf)); port_conf.rxmode.mq_mode = ETH_MQ_RX_RSS; /** The multi-queue packet distribution mode to be used, e.g. RSS.; this is important to use multiple RX queues per port ID */ port_conf.rxmode.max_rx_pkt_len = ETHER_MAX_LEN; port_conf.rxmode.hw_strip_crc = 1; /**< enable CRC stripping by hardware */ port_conf.rxmode.jumbo_frame = 1; /**< Jumbo Frame Support enabled */ //port_conf.rxmode.enable_lro = 1; /**< Enable LRO */ // NOT SUPPORTED ON TESTED HW port_conf.rx_adv_conf.rss_conf.rss_hf = ETH_RSS_IP; port_conf.txmode.mq_mode = ETH_MQ_TX_NONE; m_num_queues = MIN(64, m_dev_info->max_rx_queues); m_num_queues = MIN(128, m_num_queues); ret = rte_eth_dev_configure(m_portid, m_num_queues, 1 /* number of tx queues */, &port_conf); if (ret < 0) { HMLogError("HwEmulDPDKPort::init() rte_eth_dev_configure: err=%d, port=%u: %s", ret, m_portid, rte_strerror(ret)); return false; } // init one TX queue: even if we never ever TX packets, at least 1 queue is needed! ---> ret = rte_eth_tx_queue_setup(m_portid, 0 /* queue ID */, 64 /* num descriptors */, rte_eth_dev_socket_id(m_portid), NULL); if (ret < 0) { // retry with just 1 descriptor ---> ret = rte_eth_tx_queue_setup(m_portid, 0 /* queue ID */, 1 /* num descriptors */, rte_eth_dev_socket_id(m_portid), NULL); if (ret < 0) { HMLogError("HwEmulDPDKPort::init() rte_eth_tx_queue_setup: err=%d, port=%u: %s", ret, m_portid, rte_strerror(ret)); return false; } } Basically since I want to only receive packets (no TX) I'm not really interested in TX queues / num of TX descriptors... However I have troubles decrypting this -22 error code... any hint? Thanks a lot, Francesco Montorsi