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

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: [email protected]
Reporter: [email protected]
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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