Commits on Sep 5, 2024

1. [Snappi] Support for DUT statistics - Interface counters, PFC counter… …

   …s, and Queue counters. (sonic-net#13848)
   
   Description of PR
   Support to pull the DUT statistics, namely interface counters, PFC counters and Queue counters.
   
   This support will enable users to pull the DUT statistics run-time and capture them in form of dictionary for further processing.
   
   Summary:
   Fixes # (issue)
   sonic-net#13843
   
   Approach
   What is the motivation for this PR?
   Currently, there is no one stop-place to fetch the DUT statistics and use them for verification, especially the SNAPPI testcases. There should be some way to pull the DUT statistics ( at least important ones) and use them for verification.
   
   How did you do it?
   Clear counters:
   Common function to clear interface, PFC and queue counter stats.
   
   Interface counters:
   Ability to fetch the interface counters for a given DUT and port. Returns dictionary with keys - Rx and Tx packet count, Rx and Tx failures (Error + drops + ovr), and Rx and Tx throughput in Mbps.
   
   PFC counters:
   Ability to fetch the PFC counters for a given DUT and port. Returns dictionary with keys - Rx and Tx PFC for the given DUT, port and priority.
   
   Queue counters:
   Ability to fetch the Queue counters for a given DUT and port. Internally calls get_egress_queue_count for all the priorities. Returns dictionary with as key with transmitted packets as counter.
   
   How did you verify/test it?
   These functions are called as part of new testcases for PFC-ECN.
   
       for dut, port in dutport_list:
           f_stats = update_dict(m, f_stats, interface_stats(dut, port))
           f_stats = update_dict(m, f_stats, get_pfc_count(dut, port))
           f_stats = update_dict(m, f_stats, get_queue_count(dut, port))
   These are then used to create CSV with raw DUT statistics and then to summarize the test in the end.
   
   co-authorized by: [email protected]

   

   amitpawar12 authored and mssonicbld committed Sep 5, 2024
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