[Bug 930] ConnectX6 DPDK dpdk-testpmd Receive tcp ,udp Mixed flow performance is very low!

[Bug 930] ConnectX6 DPDK dpdk-testpmd Receive tcp ,udp Mixed flow performance is very low!

[bugzilla]

https://bugs.dpdk.org/show_bug.cgi?id=930

            Bug ID: 930
           Summary: ConnectX6 DPDK dpdk-testpmd Receive tcp ,udp Mixed
                    flow 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: killerstemp@gmail.com
  Target Milestone: ---

I use Ixia to construct two streams
Total 20Gbps  29760000 pps

flow1 udp 64size small packet
Send per second 10G bps 14880000 pps 

flow2 tcp 64size small packet 
Send per second 10G bps 14880000 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
show port stats all

testpmd> show port stats all

  ######################## NIC statistics for port 0  ########################
  RX-packets: 103906391  RX-missed: 369790696  RX-bytes:  6234383466
  RX-errors: 0
  RX-nombuf:  0         
  TX-packets: 0          TX-errors: 0          TX-bytes:  0

  Throughput (since last show)
  Rx-pps:      4205026          Rx-bps:   2018412608
  Tx-pps:            0          Tx-bps:            0
  ############################################################################

Recive per second 
2018412608  bps   2g bps
4205026      pps  4 million pps

rx_discards_phy drop per second 10 million pps

[root@localhost ~]# ethtool -S enp202s0f0 |grep dis
     rx_discards_phy: 35892329864
     tx_discards_phy: 0
     rx_prio0_discards: 35892164419
     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


If both flow become TCP, rx_discards_phy will not be drop.
flow1 tcp 64size small packet
flow2 tcp 64size small packet


testpmd> show port stats all

  ######################## NIC statistics for port 0  ########################
  RX-packets: 7177423122 RX-missed: 369790696  RX-bytes:  430645390083
  RX-errors: 0
  RX-nombuf:  0         
  TX-packets: 0          TX-errors: 0          TX-bytes:  0

  Throughput (since last show)
  Rx-pps:     29779180          Rx-bps:  14294006816
  Tx-pps:            0          Tx-bps:            0
  ############################################################################
29779180         pps  29 million pps  

rx_discards_phy no drop

[root@localhost ~]# ethtool -S enp202s0f0 |grep dis
     rx_discards_phy: 0
     tx_discards_phy: 0
     rx_prio0_discards: 0
     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


server 
dell poweredge r750
[root@localhost proc]# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                64
On-line CPU(s) list:   0-63
Thread(s) per core:    1
Core(s) per socket:    32
Socket(s):             2
NUMA node(s):          2
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 106
Model name:            Intel(R) Xeon(R) Platinum 8375C CPU @ 2.90GHz
Stepping:              6
CPU MHz:               2900.000
BogoMIPS:              5800.00
Virtualization:        VT-x
L1d cache:             48K
L1i cache:             32K
L2 cache:              1280K
L3 cache:              55296K
NUMA node0 CPU(s):    
0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62
NUMA node1 CPU(s):    
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61,63
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx
pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl
xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl
vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic
movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm
3dnowprefetch epb cat_l3 invpcid_single intel_pt ssbd mba ibrs ibpb stibp
ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1
hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a avx512f avx512dq rdseed adx smap
avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec
xgetbv1 cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln
pts avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni
avx512_bitalg avx512_vpopcntdq md_clear pconfig spec_ctrl intel_stibp flush_l1d
arch_capabilities





MLX ConnectX6  100G PCIE4 x16

[root@localhost ~]# ofed_info -s
MLNX_OFED_LINUX-5.5-1.0.3.2:

[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             20.32.1010     20.32.1010    
     PXE            3.6.0502       3.6.0502      
     UEFI           14.25.0017     14.25.0017    

  Status:           Up to date

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