Re: [dpdk-users] Mellanox Unexpected CQE error syndrome

[Slava Ovsiienko <viacheslavo@nvidia.com>]

>-----Original Message-----
>From: users <users-bounces@dpdk.org> On Behalf Of Krauz, Pavel
>Sent: Thursday, October 29, 2020 10:18 AM
>To: users@dpdk.org
>Subject: [dpdk-users] Mellanox Unexpected CQE error syndrome
>
>Hello,
>I am having problem with HPE Ethernet 100Gb 2-port 841QSFP28
>Adapter which is a Mellanox adapter for 100G network.
>
>The DPDK driver reports and generates lot of error files like
>dpdk_mlx5_port_0_rxq_0_2459159054 and loses traffic (because>IMHO
>it must reset the card):
>
>the first line of the error report files is as follows:
>
>Unexpected CQE error syndrome 0x22 CQN = 1030 RQN = 12582977
>wqe_counter = 10040 rq_ci = 494774062 cq_ci = 3586794130
>Unexpected CQE error syndrome 0x22 CQN = 1030 RQN = 12582977
>wqe_counter = 27509 rq_ci= 808774458 cq_ci = 1527072213
>Unexpected CQE error syndrome 0x0e CQN = 1030 RQN = 12582977
>wqe_counter = 0 rq_ci = 32768 cq_ci = 2413356687
>
..snip..
>
>I have tried latest card HP firmware and enable/disable CQE
>compression in the mlx5 DPDK driver using rxq_cqe_comp_en=0/1,
>but no
improvement.
>
>Does anybody know what can be the problem and how to mitigate it?
>
>Thanks
>Pavel Krauz

Hi, Pavel.

Sorry, I missed this mail from users@ mailing list.
It would be nice to create an issue in DPDK Bugzilla
and have the dedicated thread to handle.

What DPDK version do you use? Syndromes in this report
are different ones, at my first glance it looks like as not
correct MTU or max packet length is configured. The NIC receives
the packet with the length exceeding for what queue was configured
and packet data overwrite the descriptors, resulting into syndromes.

With best regards,
Slava