[root@flexran3 x86_64-native-linuxapp-icc]# ./app/testpmd -c 0xf0 -n 4 -- -i --port-topology=chained
EAL: Detected 40 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Probing VFIO support...
EAL: PCI device 0000:41:00.0 on NUMA socket 0
EAL:   probe driver: 8086:37d2 net_i40e
EAL: PCI device 0000:41:00.1 on NUMA socket 0
EAL:   probe driver: 8086:37d2 net_i40e
EAL: PCI device 0000:86:00.0 on NUMA socket 1
EAL:   probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:86:00.1 on NUMA socket 1
EAL:   probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:86:00.2 on NUMA socket 1
EAL:   probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:86:00.3 on NUMA socket 1
EAL:   probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:88:00.0 on NUMA socket 1
EAL:   probe driver: 8086:158b net_i40e
EAL: PCI device 0000:88:00.1 on NUMA socket 1
EAL:   probe driver: 8086:158b net_i40e
Interactive-mode selected
testpmd: create a new mbuf pool <mbuf_pool_socket_0>: n=171456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
testpmd: create a new mbuf pool <mbuf_pool_socket_1>: n=171456, size=2176, socket=1
testpmd: preferred mempool ops selected: ring_mp_mc
Configuring Port 0 (socket 1)
Port 0: 3C:FD:FE:CD:34:A4
Checking link statuses...
Done
testpmd>
Port 0: LSC event

testpmd>
testpmd>
testpmd> start tx_first
io packet forwarding - ports=1 - cores=1 - streams=1 - NUMA support enabled, MP over anonymous pages disabled
Logical Core 5 (socket 0) forwards packets on 1 streams:
  RX P=0/Q=0 (socket 1) -> TX P=0/Q=0 (socket 1) peer=02:00:00:00:00:00

  io packet forwarding packets/burst=32
  nb forwarding cores=1 - nb forwarding ports=1
  port 0: RX queue number: 1 Tx queue number: 1
    Rx offloads=0x1000 Tx offloads=0x10000
    RX queue: 0
      RX desc=256 - RX free threshold=32
      RX threshold registers: pthresh=8 hthresh=8  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=0x0 - TX RS bit threshold=32
testpmd> stop
Telling cores to stop...
Waiting for lcores to finish...

  ---------------------- Forward statistics for port 0  ----------------------
  RX-packets: 0              RX-dropped: 0             RX-total: 0
  TX-packets: 32             TX-dropped: 0             TX-total: 32
  ----------------------------------------------------------------------------

  +++++++++++++++ Accumulated forward statistics for all ports+++++++++++++++
  RX-packets: 0              RX-dropped: 0             RX-total: 0
  TX-packets: 32             TX-dropped: 0             TX-total: 32
  ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Done.
testpmd>