Hello Yan, Can you please mention which DPDK version you use and whether you see this issue also with latest upstream version?
Regards, Asaf Penso >-----Original Message----- >From: users <users-boun...@dpdk.org> On Behalf Of Yan, Xiaoping (NSB - >CN/Hangzhou) >Sent: Monday, July 5, 2021 1:08 PM >To: users@dpdk.org >Subject: [dpdk-users] mlx5 VF packet lost between rx_port_unicast_packets >and rx_good_packets > >Hi, > >When doing traffic loopback test on a mlx5 VF, we found there are some >packet loss (not all packet received back ). > >From xstats counters, I found all packets have been received in >rx_port_unicast_packets, but rx_good_packets has lower counter, and >rx_port_unicast_packets - rx_good_packets = lost packets i.e. packet lost >between rx_port_unicast_packets and rx_good_packets. >But I can not find any other counter indicating where exactly those packets >are lost. > >Any idea? > >Attached is the counter logs. (bf is before the test, af is after the test, >fp-cli >dpdk-port-stats is the command used to get xstats, and ethtool -S _f1 (the vf >used) also printed) Test equipment reports that it sends: 2911176 packets, >receives: 2909474, dropped: 1702 And the xstats (after - before) shows >rx_port_unicast_packets 2911177, rx_good_packets 2909475, so drop >(2911177 - rx_good_packets) is 1702 > >BTW, I also noticed this discussion "packet loss between phy and good >counter" >http://mails.dpdk.org/archives/users/2018-July/003271.html >but my case seems to be different as packet also received in >rx_port_unicast_packets, and I checked counter from pf (ethtool -S ens1f0 in >attached log), rx_discards_phy is not increasing. > >Thank you. > >Best regards >Yan Xiaoping
