[dpdk-users] rx-missed errors with the fortville nic

[Dorsett, Michal]

I would like your help in investigating a packet loss problem we have with an XL710 NIC split in 4x10 configuration and the X710:

Issue:
While injecting traffic to one of the NICs ports we noticed that not all packets are received by the application - rx_missed statistic is incrementing.

HW Environment:

-        Dell power edge r630 (BIOS 2.4.3 - release 17/Jan/2017)

-        One XL710 NIC-QDA2 connected to a 4x10G splitter (FW 5.0 API 1.5 NVM 05.00.05 eetrack 800029265, probe driver: 8086:1583 rte_i40e_pmd)

o   NIC is set to 4x10G

SW Environment:

-        DPDK version 16.07 - the issue is reproduced on version 17.08 as well.

-        4 cores (2,4,6,8 on socket 0) "connected" to all 4 ports via a dedicated queue in the following configuration example:

o   Core 4 -> queue (id=0) per  port (0,1,2,3)

o   Core 6 -> queue (id=1) per port (0,1,2,3)

o   Core 8 -> queue (id=2) per  port (0,1,2,3)

o   Core 10 -> queue (id=3) per port (0,1,2,3)


Traffic profile:

-        Frame size : 500 bytes

-        Rate : 500000 FPS

-        encapsulation : ETH-IPv6-UDP

Experiment #1 with "testpmd" application:

Load: ~2403846 FPS.

sudo ./testpmd -c 0x1555555555 -n 4 -- -i --nb-cores=16 --total-num-mbufs=262144 --rxd=1024 --rxq=8 --txq=8 --numa --port-topology=chained

After starting,  "show port stats" returned  rx_missed counter > 0.

Sample of port stats :
######################## NIC statistics for port 1  ########################
  RX-packets: 18393849   RX-missed: 112105508  RX-bytes:  67562507568
  RX-errors: 2
  RX-nombuf:  0
  TX-packets: 42         TX-errors: 0          TX-bytes:  3387

  Throughput (since last show)
  Rx-pps:      2152353
  Tx-pps:            0
  ############################################################################

Sample output when starting "testpmd":

testpmd> start
io packet forwarding - ports=4 - cores=16 - streams=32 - NUMA support enabled, MP over anonymous pages disabled
Logical Core 2 (socket 0) forwards packets on 2 streams:
  RX P=0/Q=0 (socket 0) -> TX P=1/Q=0 (socket 0) peer=02:00:00:00:00:01
  RX P=0/Q=1 (socket 0) -> TX P=1/Q=1 (socket 0) peer=02:00:00:00:00:01
Logical Core 4 (socket 0) forwards packets on 2 streams:
  RX P=0/Q=2 (socket 0) -> TX P=1/Q=2 (socket 0) peer=02:00:00:00:00:01
 RX P=0/Q=3 (socket 0) -> TX P=1/Q=3 (socket 0) peer=02:00:00:00:00:01
Logical Core 6 (socket 0) forwards packets on 2 streams:
  RX P=0/Q=4 (socket 0) -> TX P=1/Q=4 (socket 0) peer=02:00:00:00:00:01
  RX P=0/Q=5 (socket 0) -> TX P=1/Q=5 (socket 0) peer=02:00:00:00:00:01
Logical Core 8 (socket 0) forwards packets on 2 streams:
  RX P=0/Q=6 (socket 0) -> TX P=1/Q=6 (socket 0) peer=02:00:00:00:00:01
  RX P=0/Q=7 (socket 0) -> TX P=1/Q=7 (socket 0) peer=02:00:00:00:00:01
Logical Core 10 (socket 0) forwards packets on 2 streams:
  RX P=1/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=1 (socket 0) -> TX P=0/Q=1 (socket 0) peer=02:00:00:00:00:00
Logical Core 12 (socket 0) forwards packets on 2 streams:
  RX P=1/Q=2 (socket 0) -> TX P=0/Q=2 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=3 (socket 0) -> TX P=0/Q=3 (socket 0) peer=02:00:00:00:00:00
Logical Core 14 (socket 0) forwards packets on 2 streams:
  RX P=1/Q=4 (socket 0) -> TX P=0/Q=4 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=5 (socket 0) -> TX P=0/Q=5 (socket 0) peer=02:00:00:00:00:00
Logical Core 16 (socket 0) forwards packets on 2 streams:
  RX P=1/Q=6 (socket 0) -> TX P=0/Q=6 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=7 (socket 0) -> TX P=0/Q=7 (socket 0) peer=02:00:00:00:00:00
Logical Core 18 (socket 0) forwards packets on 2 streams:
  RX P=2/Q=0 (socket 0) -> TX P=3/Q=0 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=1 (socket 0) -> TX P=3/Q=1 (socket 0) peer=02:00:00:00:00:03
Logical Core 20 (socket 0) forwards packets on 2 streams:
  RX P=2/Q=2 (socket 0) -> TX P=3/Q=2 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=3 (socket 0) -> TX P=3/Q=3 (socket 0) peer=02:00:00:00:00:03
Logical Core 22 (socket 0) forwards packets on 2 streams:
  RX P=2/Q=4 (socket 0) -> TX P=3/Q=4 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=5 (socket 0) -> TX P=3/Q=5 (socket 0) peer=02:00:00:00:00:03
Logical Core 24 (socket 0) forwards packets on 2 streams:
  RX P=2/Q=6 (socket 0) -> TX P=3/Q=6 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=7 (socket 0) -> TX P=3/Q=7 (socket 0) peer=02:00:00:00:00:03
Logical Core 26 (socket 0) forwards packets on 2 streams:
  RX P=3/Q=0 (socket 0) -> TX P=2/Q=0 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=1 (socket 0) -> TX P=2/Q=1 (socket 0) peer=02:00:00:00:00:02
Logical Core 28 (socket 0) forwards packets on 2 streams:
  RX P=3/Q=2 (socket 0) -> TX P=2/Q=2 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=3 (socket 0) -> TX P=2/Q=3 (socket 0) peer=02:00:00:00:00:02
Logical Core 30 (socket 0) forwards packets on 2 streams:
  RX P=3/Q=4 (socket 0) -> TX P=2/Q=4 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=5 (socket 0) -> TX P=2/Q=5 (socket 0) peer=02:00:00:00:00:02
Logical Core 32 (socket 0) forwards packets on 2 streams:
  RX P=3/Q=6 (socket 0) -> TX P=2/Q=6 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=7 (socket 0) -> TX P=2/Q=7 (socket 0) peer=02:00:00:00:00:02

Experiment #2 with "testpmd" application:

The following configuration (2403846 FPS) generates no rx missed:

sudo ./testpmd -c 0x15555 -n 4 -- -i --nb-cores=8 --total-num-mbufs=262144 --rxd=1024 --rxq=8 --txq=8 --numa --port-topology=chained

testpmd> start
io packet forwarding - ports=4 - cores=8 - streams=32 - NUMA support enabled, MP over anonymous pages disabled
Logical Core 2 (socket 0) forwards packets on 4 streams:
  RX P=0/Q=0 (socket 0) -> TX P=1/Q=0 (socket 0) peer=02:00:00:00:00:01
  RX P=0/Q=1 (socket 0) -> TX P=1/Q=1 (socket 0) peer=02:00:00:00:00:01
  RX P=0/Q=2 (socket 0) -> TX P=1/Q=2 (socket 0) peer=02:00:00:00:00:01
  RX P=0/Q=3 (socket 0) -> TX P=1/Q=3 (socket 0) peer=02:00:00:00:00:01
Logical Core 4 (socket 0) forwards packets on 4 streams:
  RX P=0/Q=4 (socket 0) -> TX P=1/Q=4 (socket 0) peer=02:00:00:00:00:01
  RX P=0/Q=5 (socket 0) -> TX P=1/Q=5 (socket 0) peer=02:00:00:00:00:01
  RX P=0/Q=6 (socket 0) -> TX P=1/Q=6 (socket 0) peer=02:00:00:00:00:01
  RX P=0/Q=7 (socket 0) -> TX P=1/Q=7 (socket 0) peer=02:00:00:00:00:01
Logical Core 6 (socket 0) forwards packets on 4 streams:
  RX P=1/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=1 (socket 0) -> TX P=0/Q=1 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=2 (socket 0) -> TX P=0/Q=2 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=3 (socket 0) -> TX P=0/Q=3 (socket 0) peer=02:00:00:00:00:00
Logical Core 8 (socket 0) forwards packets on 4 streams:
  RX P=1/Q=4 (socket 0) -> TX P=0/Q=4 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=5 (socket 0) -> TX P=0/Q=5 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=6 (socket 0) -> TX P=0/Q=6 (socket 0) peer=02:00:00:00:00:00
  RX P=1/Q=7 (socket 0) -> TX P=0/Q=7 (socket 0) peer=02:00:00:00:00:00
Logical Core 10 (socket 0) forwards packets on 4 streams:
  RX P=2/Q=0 (socket 0) -> TX P=3/Q=0 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=1 (socket 0) -> TX P=3/Q=1 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=2 (socket 0) -> TX P=3/Q=2 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=3 (socket 0) -> TX P=3/Q=3 (socket 0) peer=02:00:00:00:00:03
Logical Core 12 (socket 0) forwards packets on 4 streams:
  RX P=2/Q=4 (socket 0) -> TX P=3/Q=4 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=5 (socket 0) -> TX P=3/Q=5 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=6 (socket 0) -> TX P=3/Q=6 (socket 0) peer=02:00:00:00:00:03
  RX P=2/Q=7 (socket 0) -> TX P=3/Q=7 (socket 0) peer=02:00:00:00:00:03
Logical Core 14 (socket 0) forwards packets on 4 streams:
  RX P=3/Q=0 (socket 0) -> TX P=2/Q=0 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=1 (socket 0) -> TX P=2/Q=1 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=2 (socket 0) -> TX P=2/Q=2 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=3 (socket 0) -> TX P=2/Q=3 (socket 0) peer=02:00:00:00:00:02
Logical Core 16 (socket 0) forwards packets on 4 streams:
  RX P=3/Q=4 (socket 0) -> TX P=2/Q=4 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=5 (socket 0) -> TX P=2/Q=5 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=6 (socket 0) -> TX P=2/Q=6 (socket 0) peer=02:00:00:00:00:02
  RX P=3/Q=7 (socket 0) -> TX P=2/Q=7 (socket 0) peer=02:00:00:00:00:02


testpmd> show port stats 1

  ######################## NIC statistics for port 1  ########################
  RX-packets: 211295261  RX-missed: 0          RX-bytes:  104802384960
  RX-errors: 0
  RX-nombuf:  0
  TX-packets: 53         TX-errors: 0          TX-bytes:  4047

  Throughput (since last show)
  Rx-pps:      2403872
  Tx-pps:            0
  ############################################################################


Note that we experience this issue with traffic as low as 1.5Gbps.

This is a show-stopper issue for us. Any assistance will be much appreciated.

Thanks,

Michal Dorsett
Developer, Strategic IP Group
Desk: +972 962 4350
Mobile: +972 50 771 6689
Verint Cyber Intelligence
www.verint.com<http://www.verint.com/>



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