TX problems reading buffer 3 or 4 of 5th interface of SmartNIC K3P-Q

[pkipper]

Hi All,

We are facing problems when accessing RX buffers 3 or 4 of the 5th Cisco Nexus SmartNIC K3P-Q (former Exanic x100) network interface.
We were able to reproduce the problem using steering example firmware from FDK 2.9.0 and instantiating 3 instances of exanic-ip-filter-specific utility from SDK 2.7.3.
Right after accessing the problematic RX buffers, 6 successful packets are still sent and then TX error counter (on ifconfig) starts increasing on all 8 smart NIC interfaces. After Tx errors start, the only way to recover is rebooting the whole host.
We tested on different machines with distinct configurations. The problem happens consistently.
The problem does not happen when using oficial FW (20211111)

[Georg Pauwen]

Hello,

can you draw this out (provide a drawing that shows all components involved) and indicate where exactly the problem occurs ?