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

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

I changed a network card MCX614106A-CCA_Ax still has this problem!

Device #1:


Device Type: ConnectX6

Part Number: MCX614106A-CCA_Ax

Description: ConnectX-6 EN adapter card; 100GbE; dual-port QSFP56; Socket Direct 2x PCIe3.0 x16; tall bracket; ROHS R6

PSID: MT_0000000220

PCI Device Name: 0000:ca:00.0

Base GUID: 0c42a103005f8570

Base MAC: 0c42a15f8570

Versions: Current Available

FW 20.30.1004 N/A

PXE 3.6.0301 N/A

UEFI 14.23.0017 N/A

Status: No matching image found

Hi Li,

I don’t think this is related as the issue exhibit when you are mixing flows.

If CQE Compression is enabled then you need to use the value rxq_cqe_comp_en=4 for mixed traffic

https://doc.dpdk.org/guides/nics/mlx5.html. ((See 36.5.3.2)).

This is recommended for mixed UDP+TCP Traffic.

Should this not resolve your issue, a support case with a valid support contract will need to be opened to further troubleshoot/debug.

Sophie.