Hi all, We have a DPDK application that’s running using 82599 NICs with the ixgbe driver. Our application makes use of RSS and runs with 8 or 16 queues depending on the environment. I was reviewing xstats from a DPDK application that we run, and found that ‘rx_qN_packets’ was 0 for all queues except queue 0.
I was able to reproduce this using dpdk-testpmd from the 20.11 release. Additionally I used the ethregs tool and confirmed that the registers are indeed 0. Is this expected behavior, and is there a proper way to get per queue packet counts from hardware registers? ./dpdk-testpmd -l 0-8 -n 4 -m5120,5120 -- -i --forward-mode=rxonly --rxq=2 --txq=2 --portmask=0xc --rxd=65536 --nb-cores=8 --rss-ip I then run ‘start’ Truncated uput from ‘show port xstats all’ ###### NIC extended statistics for port 2 rx_good_packets: 480147 tx_good_packets: 0 rx_good_bytes: 558567639 tx_good_bytes: 0 rx_missed_errors: 602293 rx_errors: 0 tx_errors: 0 rx_mbuf_allocation_errors: 0 rx_q0_packets: 480147 rx_q0_bytes: 558567639 rx_q0_errors: 0 rx_q1_packets: 0 ###### NIC extended statistics for port 3 rx_good_packets: 419519 tx_good_packets: 0 rx_good_bytes: 438407091 tx_good_bytes: 0 rx_missed_errors: 441020 rx_errors: 0 tx_errors: 0 rx_mbuf_allocation_errors: 0 rx_q0_packets: 419519 rx_q0_bytes: 438407091 rx_q0_errors: 0 rx_q1_packets: 0 rx_q1_bytes: 0 rx_q1_errors: 0 Output at shutdown which shows both queues servicing packets ------- Forward Stats for RX Port= 2/Queue= 0 -> TX Port= 3/Queue= 0 ------- RX-packets: 116794 TX-packets: 0 TX-dropped: 0 ------- Forward Stats for RX Port= 3/Queue= 0 -> TX Port= 2/Queue= 0 ------- RX-packets: 156055 TX-packets: 0 TX-dropped: 0 ------- Forward Stats for RX Port= 2/Queue= 1 -> TX Port= 3/Queue= 1 ------- RX-packets: 607297 TX-packets: 0 TX-dropped: 0 ------- Forward Stats for RX Port= 3/Queue= 1 -> TX Port= 2/Queue= 1 ------- RX-packets: 451971 TX-packets: 0 TX-dropped: 0 ---------------------- Forward statistics for port 2 ---------------------- RX-packets: 724010 RX-dropped: 0 RX-total: 724010 TX-packets: 0 TX-dropped: 0 TX-total: 0 ---------------------------------------------------------------------------- ---------------------- Forward statistics for port 3 ---------------------- RX-packets: 607924 RX-dropped: 0 RX-total: 607924 TX-packets: 0 TX-dropped: 0 TX-total: 0 ---------------------------------------------------------------------------- +++++++++++++++ Accumulated forward statistics for all ports+++++++++++++++ RX-packets: 1331934 RX-dropped: 0 RX-total: 1331934 TX-packets: 0 TX-dropped: 0 TX-total: 0 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Thanks, Trevor
