From: Parvathy Tarur Ramachandran
Sent: Monday, December 21, 2020 10:23 AM
To: [email protected]
Subject: system-dpdk : testpmd not forwarding packets; 4th and 5th test cases
failing
Hi all,
When I run the 4th and 5th testcases of the system-dpdk testsuite
(system-dpdk.at : ping vhost-user/ vhost-user-client port ) , I can see that
the ping is not going through. The test tries to ping two namespaces via a veth
and dpdkvhostuser/vhostuserclient port, using testpmd as a forwarding agent.
Upon further debugging, I can see that testpmd is dropping the packets from
within .
The command used to start testpmd is -
tail -f /dev/null | testpmd --socket-mem="$(cat NUMA_NODE)" --no-pci\
--vdev="net_virtio_user,path=$OVS_RUNDIR/dpdkvhostuser0" \
--vdev="net_tap0,iface=tap0" --file-prefix page0 \
--single-file-segments -- -a >$OVS_RUNDIR/testpmd-dpdkvhostuser0.log
2>&1 &
Here are the testpmd logs in interactive mode -
testpmd> show port stats 1
######################## NIC statistics for port 1 ########################
RX-packets: 8 RX-missed: 0 RX-bytes: 648
RX-errors: 0
RX-nombuf: 0
TX-packets: 0 TX-errors: 0 TX-bytes: 0
Throughput (since last show)
Rx-pps: 0
Tx-pps: 0
############################################################################
testpmd> show port stats 0
######################## NIC statistics for port 0 ########################
RX-packets: 0 RX-missed: 0 RX-bytes: 0
RX-errors: 0
RX-nombuf: 0
TX-packets: 0 TX-errors: 0 TX-bytes: 0
Throughput (since last show)
Rx-pps: 0
Tx-pps: 0
############################################################################
It seems like testpmd is receiving the packets from tap0 ( port 1 ) but not
forwarding them to dpdkvhostuser0 ( port 0 ) . We have seen similar behavior
with DPDK 19.11 as well. Has anyone run into this problem before? Any help
would be appreciated :)
Thanks,
Parvathy
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