[DPDK Bug 1377] per queue counters are not working on Intel XL710 based SRIOV VFs using iavf pmd

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=1377

            Bug ID: 1377
           Summary: per queue counters are not working on  Intel XL710
                    based SRIOV VFs using iavf pmd
           Product: DPDK
           Version: 22.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: sahithi.singam at oracle.com
  Target Milestone: ---

Per queue counters are not working on Intel XL710 SRIOV VFs using iavf pmd in
both DPDK 21.11 and 22.11 version. 

But per queue counters are populated when the same device is managed by iavf
kernel module. 
==============================
"/sys/bus/pci/devices # ethtool -S eth1
NIC statistics:
     rx_bytes: 2880
     rx_unicast: 0
     rx_multicast: 0
     rx_broadcast: 45
     rx_discards: 0
     rx_unknown_protocol: 0
     tx_bytes: 0
     tx_unicast: 0
     tx_multicast: 0
     tx_broadcast: 0
     tx_discards: 0
     tx_errors: 0
     tx-0.packets: 3
     tx-0.bytes: 266
     rx-0.packets: 0
     rx-0.bytes: 0
     tx-1.packets: 0
     tx-1.bytes: 0
     rx-1.packets: 0
     rx-1.bytes: 0
     tx-2.packets: 0
     tx-2.bytes: 0
     rx-2.packets: 47
     rx-2.bytes: 2820
     tx-3.packets: 2
     tx-3.bytes: 180
     rx-3.packets: 0
     rx-3.bytes: 0

/sys/bus/pci/devices # ethtool -i eth1
driver: iavf
version: 5.15.0
firmware-version: N/A
expansion-rom-version:
bus-info: 0000:00:0a.0
supports-statistics: yes"

"/sys/bus/pci/devices # lspci -n -s 00:0a.0
00:0a.0 0200: 8086:154c (rev 01)"
=============================================

We also observed similar issue with PF devices of XL710 using i40e pmd and on
Intel 810-C series NICS using ice pmd .

Can someone please confirm whether this is DPDK pmd limitation or a NIC
specific limitation ? If [yes], can you also please point to the relevant
documentation .

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