[dpdk-dev] migration from 17.05 to 17.11, testpmd not able to bring up ports for virtio instance running inside a VM

["Bly, Mike" <mbly@ciena.com>]

Does anyone have some suggestions on where to start with this ?

When we run this using DPDK 17.05, the ports come up fine for our design and testpmd. However, with 17.11, the ports to not come up and I end up with undefined rx_pkt_burst/tx_pkt_burst functions as shown here:

(gdb) p  rte_eth_devices[0]
$1 = {
  rx_pkt_burst = 0x0,
  tx_pkt_burst = 0x0,
  tx_pkt_prepare = 0x0,
  data = 0x7f46c31b7640,
  dev_ops = 0xab0580 <virtio_eth_dev_ops>,
  device = 0x7f46c40240e0,
  intr_handle = 0x7f46c40241b8,
  link_intr_cbs = {
    tqh_first = 0x7f46c318a200,
    tqh_last = 0x7f46c318a200
  },
  post_rx_burst_cbs = {0x0 <repeats 1024 times>},
  pre_tx_burst_cbs = {0x0 <repeats 1024 times>},
  state = RTE_ETH_DEV_ATTACHED,
  security_ctx = 0x0
}

Here is the sequence for testpmd using 17.11:

root:/# dpdk-devbind -s

Network devices using DPDK-compatible driver
============================================
0000:00:06.0 'Virtio network device 1000' drv=uio_pci_generic unused=vfio-pci
0000:00:07.0 'Virtio network device 1000' drv=uio_pci_generic unused=vfio-pci

Network devices using kernel driver
===================================
0000:00:03.0 'Virtio network device 1000' if=eth0 drv=virtio-pci unused=vfio-pci,uio_pci_generic

Other Network devices
=====================
<none>

Crypto devices using DPDK-compatible driver
===========================================
<none>

Crypto devices using kernel driver
==================================
<none>

Other Crypto devices
====================
<none>

Eventdev devices using DPDK-compatible driver
=============================================
<none>

Eventdev devices using kernel driver
====================================
<none>

Other Eventdev devices
======================
<none>

Mempool devices using DPDK-compatible driver
============================================
<none>

Mempool devices using kernel driver
===================================
<none>

Other Mempool devices
=====================
<none>

root:/# testpmd -c 7 -n 3 -b 0000:00:03.0 -- -i --nb-cores=2 --nb-ports=2
EAL: Detected 4 lcore(s)
EAL: Probing VFIO support...
EAL: VFIO support initialized
EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using unreliable clock cycles !
EAL: PCI device 0000:00:03.0 on NUMA socket -1
EAL:   Device is blacklisted, not initializing
EAL: PCI device 0000:00:06.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
EAL: PCI device 0000:00:07.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 1af4:1000 net_virtio
Interactive-mode selected
USER1: create a new mbuf pool <mbuf_pool_socket_0>: n=163456, size=2176, socket=0
Configuring Port 0 (socket 0)
EAL: Unknown handle type of fd 20
EAL: Unknown handle type of fd 20
Fail to start port 0
Configuring Port 1 (socket 0)
EAL: Unknown handle type of fd 22
EAL: Unknown handle type of fd 22
Fail to start port 1
Please stop the ports first
Done
testpmd>



Mike Bly | Principal Software Engineer/Architect, Packet Software & Access - Advanced Development
mbly@ciena.com<mailto:mbly@ciena.com> | 12730 E. Mirabeau Pkwy | Spokane Valley, WA 99216
Direct +1.509.242.9246 | Fax +1.509.242.9001