Cant capture packets using dpdk-pdump about open-nic-dpdk

[cneely-amd]

Hi @vaniaprkl ,

I know that a few people have used dpdk-testpmd okay, but I'm not aware of anyone using dpdk-pdump. The port of the AMD-Xilinx DPDK QDMA drivers to OpenNIC was contributed by someone in the community. Getting that to work might require some additional changes.

--Chris

[cneely-amd]

Hi @vaniaprkl ,

I chatted with someone who did use a combination of dpdk-testpmd + dpdk-pdump recently to test. They used testpmd in --interactive mode. They said dpdk-testpmd showed two ports forwarding packets back and forth. They tried start tx_first 10 and they could see packets passed via the FPGA by running show port stats all and also checking the FPGA packet counters.
They also tried dpdk-pdump -l 9-13 -n 9 -- --pdump 'port=0,queue=*,rx-dev=/tmp/port0.pcap' --pdump 'port=1,queue=*,rx-dev=/tmp/port1.pcap' to add capture ports to both sides of the chain. They said waiting a few seconds and hitting ctrl-c showed millions of packets captured (verified via capinfos /tmp/port0.pcp). This is a different test, but the above description should hopefully help give an example of a successful test.

Best regards,
--Chris

[cneely-amd]

One other note is that testpmd might be expecting packets with a matching destination MAC+IP, but we don't know that for certain.

[attdone]

Hi Team,
I am facing similar issue, can I know how you have tested dpdk-pdump further?
While testing DPDK TestPMD with Loopback setup, the tx packets are counted under show port stats all, but the rx packets are 0. I was using below command to test testpmd.

sudo ./build/app/dpdk-testpmd -l 1-3 -n 4 -a 0000:08:00.0 -- --burst=256 -i --nb-cores=1 --forward-mode=io --rxd=2048 --txd=2048 --mbcache=512 --mbuf-size=4096 .

Please let me know what changes to be done so that the RX packets are also gets incremented.?