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* DPDK Packet Reception: No Packets Received Across Interfaces on Same Host
@ 2024-04-30  7:18 Aniurm
  0 siblings, 0 replies; only message in thread
From: Aniurm @ 2024-04-30  7:18 UTC (permalink / raw)
  To: users

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Hi, I’d like to test the latency between different network interfaces on
the same host machine using DPDK applications.

However, my DPDK application is currently unable to receive any packets,
although it was successful with the same configuration previously. Here are
the details:
My configuration Sender

sudo ./pktgen -l 0,2 -n 4 --proc-type auto --file-prefix pg -a 03:00.0
-- -m "[2].0" -T -P

Pktgen:/> start 0

/ Ports 0-0 of 1   <Main Page>  Copyright(c) <2010-2023>, Intel Corporation
  Port:Flags        : 0:P------      Single
Link State          :        <UP-100000-FD>     ---Total Rate---
Pkts/s Rx           :                     0                    0
       Tx           :            22,764,800           22,764,800
MBits/s Rx/Tx       :              0/14,569             0/14,569
Pkts/s Rx Max       :                     0                    0
       Tx Max       :            23,168,768           23,168,768
Broadcast           :                     0
Multicast           :                     0
Sizes 64            :                     0
      65-127        :                     0
      128-255       :                     0
      256-511       :                     0
      512-1023      :                     0
      1024-1518     :                     0
Runts/Jumbos        :                   0/0
ARP/ICMP Pkts       :                   0/0
Errors Rx/Tx        :                   0/0
Total Rx Pkts       :                     0
      Tx Pkts       :         1,922,118,272
      Rx/Tx MBs     :           0/1,230,155
TCP Flags           :                .A....
TCP Seq/Ack         :           74616/74640
Pattern Type        :               abcd...
Tx Count/% Rate     :         Forever /100%
Pkt Size/Rx:Tx Burst:           64 / 64: 64
TTL/Port Src/Dest   :        64/ 1234/ 5678
Pkt Type:VLAN ID    :       IPv4 / TCP:0001
802.1p CoS/DSCP/IPP :             0/  0/  0
VxLAN Flg/Grp/vid   :      0000/    0/    0
IP  Destination     :           192.168.1.1
    Source          :        192.168.0.1/24
MAC Destination     :     00:00:00:00:00:00
    Source          :     b8:59:9f:42:6d:24
NUMA/Vend:ID/PCI    :   0/15b3:a2d2/03:00.0
-- Pktgen 24.03.1 (DPDK 24.03.0-rc4)  Powered by DPDK  (pid:123993) -----------

Pktgen as receiver

sudo ./pktgen -l 1,3,5 -n 4 --proc-type auto --file-prefix pg-receive
-a 82:00.0 -- -P -m "[3/5].0" -T

\ Ports 0-0 of 1   <Main Page>  Copyright(c) <2010-2023>, Intel Corporation
  Port:Flags        : 0:P------      Single
Link State          :        <UP-100000-FD>     ---Total Rate---
Pkts/s Rx           :                     0                    0
       Tx           :                     0                    0
MBits/s Rx/Tx       :                   0/0                  0/0
Pkts/s Rx Max       :                     1                    1
       Tx Max       :                     0                    0
Broadcast           :                     0
Multicast           :                     0
Sizes 64            :                     0
      65-127        :                   128
      128-255       :                     0
      256-511       :                     0
      512-1023      :                     0
      1024-1518     :                     0
Runts/Jumbos        :                   0/0
ARP/ICMP Pkts       :                   0/0
Errors Rx/Tx        :                   0/0
Total Rx Pkts       :                     2
      Tx Pkts       :                     0
      Rx/Tx MBs     :                   0/0
TCP Flags           :                .A....
TCP Seq/Ack         :           74616/74640
Pattern Type        :               abcd...
Tx Count/% Rate     :         Forever /100%
Pkt Size/Rx:Tx Burst:           64 / 64: 64
TTL/Port Src/Dest   :        64/ 1234/ 5678
Pkt Type:VLAN ID    :       IPv4 / TCP:0001
802.1p CoS/DSCP/IPP :             0/  0/  0
VxLAN Flg/Grp/vid   :      0000/    0/    0
IP  Destination     :           192.168.1.1
    Source          :        192.168.0.1/24
MAC Destination     :     00:00:00:00:00:00
    Source          :     7c:fe:90:55:db:5a
NUMA/Vend:ID/PCI    :   1/15b3:1013/82:00.0
-- Pktgen 24.03.1 (DPDK 24.03.0-rc4)  Powered by DPDK  (pid:124523) -----------

Testpmd as receiver

sudo ./dpdk-testpmd -l 1,3,5 -n 4 --file-prefix pg-receive --proc-type
auto -a 82:00.0 -- -i --portlist=0 --nb-cores=2 --port-topology=loop

testpmd> start

...

testpmd> stop

  ---------------------- Forward statistics for port 0  ----------------------
  RX-packets: 0              RX-dropped: 0             RX-total: 0
  TX-packets: 0              TX-dropped: 0             TX-total: 0
  ----------------------------------------------------------------------------

  +++++++++++++++ Accumulated forward statistics for all ports+++++++++++++++
  RX-packets: 0              RX-dropped: 0             RX-total: 0
  TX-packets: 0              TX-dropped: 0             TX-total: 0
  ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

l2fwd as receiver

 sudo ./build/l2fwd -l 1,3,5 -n 4 --file-prefix pg-receive --proc-type
auto -a 82:00.0 -- -p 0001 -P

Port statistics ====================================
Statistics for port 0 ------------------------------
Packets sent:                        0
Packets received:                    0
Packets dropped:                     0
Aggregate statistics ===============================
Total packets sent:                  0
Total packets received:              0
Total packets dropped:               0
====================================================

tcpdump

sudo tcpdump -i enp130s0np0 -n

tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on enp130s0np0, link-type EN10MB (Ethernet), snapshot length
262144 bytes
06:43:06.954175 LLDP, length 59
06:43:37.007247 LLDP, length 59
06:44:07.059921 LLDP, length 59
06:44:37.112526 LLDP, length 59
06:45:07.164358 LLDP, length 59

tcpdump cannot catch any packtes generated by pktgen sender.
System Information

$ ifconfig -a

enp130s0np0: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST>  mtu 1500
        inet 192.168.3.1  netmask 255.255.255.0  broadcast 192.168.3.255
        inet6 fe80::7efe:90ff:fe55:db5a  prefixlen 64  scopeid 0x20<link>
        ether 7c:fe:90:55:db:5a  txqueuelen 1000  (Ethernet)
        RX packets 65  bytes 4745 (4.7 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 14  bytes 1076 (1.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        (82:00.0)

enp3s0f0np0: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST>  mtu 1500
        inet 192.168.3.2  netmask 255.255.255.0  broadcast 192.168.3.255
        inet6 fe80::ba59:9fff:fe42:6d24  prefixlen 64  scopeid 0x20<link>
        ether b8:59:9f:42:6d:24  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 15  bytes 1146 (1.1 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        (03:00.0)

sudo ./dpdk-devbind.py -s

Network devices using kernel driver
===================================0000:03:00.0 'MT416842 BlueField
integrated ConnectX-5 network controller a2d2' if=enp3s0f0np0
drv=mlx5_core unused=vfio-pci *Active*0000:82:00.0 'MT27700 Family
[ConnectX-4] 1013' if=enp130s0np0 drv=mlx5_core unused=vfio-pci
*Active*

The two network cards, 03:00.0 and 82:00.0, are directly connected using a
single Ethernet cable.

Ubuntu20.04

DPDK version: 23.11.0

Pktgen version: 24.03.1
What I’m looking for

   - Any suggestions on troubleshooting methods or similar experiences
   - Recommendations for configuration adjustments or hardware compatibility

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2024-04-30  7:18 DPDK Packet Reception: No Packets Received Across Interfaces on Same Host Aniurm

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