Observation.

Two instances of testpmd.  Only one report shows correct stats when you run
16 queues on RX with the default RSS config.
i.e rss-ip , rss-udp etc.  You only see the counter for a single queue.

How I know I took last report on first intestine test-pmd at the end of
run, take all bytes added. I know time I run compute pps
correlated to the PPS in the actual switch.

so either ICEN or IAVF doesn't report stats (only for queue 0)




On Fri, Apr 18, 2025 at 10:30 PM spyroot <spyroot@gmail.com> wrote:

> Hi Folks,
>
>
> I am observing that DPDK test-pmd with IAVF PMD, ICEN PF driver,
>
> reporting statistics incorrectly when the RX side generates a UDP flow that randomizes or increments IP/UDP header data (IP/port, etc).
>
> I tested all 23.x stable and all branches.
>
>
> -If I use *single* flow (on the TX side, all tuples are the same on the RX
>
> HASH() produce -> same result). no issue.
>
> So, on the RX side, I see all zero packet drops and the correct pps value reported by test-pmd.
>
>
> - If I increase the number of flows ( IP/UDP, etc.), the PPS Counter and byte/pkt counter
>
> report only single queues. (i.e, it looks to me like it uses some default queue 0
>
> or something and skips the rest 15 (in my case --rxq=16). (It could IAVF do that or ICEN report that). I'm not sure.
>
>
> For example, the counter I'm referring to test-pmd Rx-pps counter.
>
>
> Rx-pps: 4158531 Rx-bps: 2129167832
>
>
> I'm also observing PMD Failing fetch stats error msg.
>
>
> iavf_query_stats(): fail to execute command OP_GET_STATS
>
> iavf_dev_stats_get(): Get statistics failed
>
>
> My Question.
>
>
> If I have two instances of
>
> test-pmd --allowed X
>
> test-pmd --allowed Y
>
> Where X is VFs PCI ADDR X and Y  PCI ADDR Y from the  PF?
>
> I expect to see the total stats (pps/bytes, etc.) (combined value for all 16 queues for a port 0 )
>
> RX-PPS and bytes per port on both instances.
>
> Yes/No?
>
>
> Has anyone had a similar issue in the past?
>
>
> Thank you,
>
> MB
>
>