https://bugs.dpdk.org/show_bug.cgi?id=924

            Bug ID: 924
           Summary: Mellanox ConnectX6 DPDK dpdk-testpmd Receive error len
                    error checksum UDP packet performance is very low!
           Product: DPDK
           Version: 21.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: 188989801@qq.com
  Target Milestone: ---

I use Ixia to construct two streams  
flow1 udp 64size small packet
flow2 udp 64size small packet error len error checksum
Send per second 30G bps  57 million pps


./dpdk-testpmd -l 4-22 -n 8 -- -i --rxq 19 --txq 19 --nb-cores 18 --rxd 2048
--txd 2048 --portmask 0xff

set fwd rxonly
start

  ######################## NIC statistics for port 6  ########################
  RX-packets: 178423861761 RX-missed: 646877     RX-bytes:  11419127182586
  RX-errors: 0
  RX-nombuf:  0        
  TX-packets: 0          TX-errors: 0          TX-bytes:  0

  Throughput (since last show)
  Rx-pps:      5904277          Rx-bps:   3022990248
  Tx-pps:            0          Tx-bps:            0
  ############################################################################
Recive per second 3G bps 5 million pps ,Only about one tenth was received

rx_discards_phy drop
[root@localhost ~]#  ethtool -S enp202s0f0 |grep dis
     rx_discards_phy: 48832790759
     tx_discards_phy: 0
     rx_prio0_discards: 48832470594
     rx_prio1_discards: 0
     rx_prio2_discards: 0
     rx_prio3_discards: 0
     rx_prio4_discards: 0
     rx_prio5_discards: 0
     rx_prio6_discards: 0
     rx_prio7_discards: 0


When I change the flow2 to no problem udp, It's all normal.

  ######################## NIC statistics for port 6  ########################
  RX-packets: 179251451823 RX-missed: 660384     RX-bytes:  11472092947106
  RX-errors: 0
  RX-nombuf:  0        
  TX-packets: 0          TX-errors: 0          TX-bytes:  0

  Throughput (since last show)
  Rx-pps:     57553942          Rx-bps:  29467618576
  Tx-pps:            0          Tx-bps:            0
  ############################################################################

Recive per second 29.4G bps 57 million pps



[root@localhost ~]# mlxfwmanager
Querying Mellanox devices firmware ...

Device #1:
----------

  Device Type:      ConnectX6
  Part Number:      MCX653106A-ECA_Ax
  Description:      ConnectX-6 VPI adapter card; H100Gb/s (HDR100; EDR IB and
100GbE); dual-port QSFP56; PCIe3.0 x16; tall bracket; ROHS R6
  PSID:             MT_0000000224
  PCI Device Name:  0000:ca:00.0
  Base MAC:         08c0eb204e5a
  Versions:         Current        Available    
     FW             20.30.1004     20.32.1010   
     PXE            3.6.0301       3.6.0502     
     UEFI           14.23.0017     14.25.0017   

  Status:           Update required

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