[trim]: Add Packet Trimming Drop Counters CLI

[nazariig]

Signed-off-by: Nazarii Hnydyn nazariig@nvidia.com

HLD: sonic-net/SONiC#2033

What I did

• Implemented CLI for Packet Trimming Drop Counters feature

How I did it

• Integrated Packet Trimming Drop Counters interface into config and show CLI root

How to verify it

1. Run Packet Trimming CLI UTs

Previous command output (if the output of a command-line utility has changed)

admin@sonic:/home/admin# show interfaces counters trim Ethernet0
    IFACE    STATE    TRIM_PKTS
---------  -------  -----------
Ethernet0        U          100

New command output (if the output of a command-line utility has changed)

admin@sonic:/home/admin# show interfaces counters trim Ethernet0
    IFACE    STATE    TRIM_PKTS    TRIM_TX_PKTS    TRIM_DRP_PKTS
---------  -------  -----------  --------------  ---------------
Ethernet0        U          100              50               50

A picture of a cute animal (not mandatory but encouraged)

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   //////   ' \/ `   ---
  //// / // :    : ---
 // /   /  /`    '--
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[mssonicbld]

/azp run

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[mssonicbld]

/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

[nazariig]

@kperumalbfn / @r12f this is a blocker for SWSS CI. Can you please help to review & merge?

[mssonicbld]

/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[kperumalbfn]

@qiluo-msft Could you please merge this PR

[Copilot]

Pull Request Overview

The PR implements CLI for Packet Trimming Drop Counters feature by adding new trimming counters (trimmed sent packets and trimmed dropped packets) in addition to the existing total trimmed packets counter. It extends both interface and switch-level statistics to support the new granular trimming counters.

• Adds switch-level trimming statistics with new switchstat CLI command
• Extends interface trimming counters to include sent and dropped packet counts
• Updates all related utilities, tests, and mock data to support the new counters

Reviewed Changes

Copilot reviewed 33 out of 33 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
utilities_common/switchstat.py	New module implementing switch-level trimming statistics functionality
utilities_common/portstat.py	Extended to support new trimmed sent/dropped packet counters
utilities_common/netstat.py	Enhanced format functions to handle raw negative values
tests/switchstat_test.py	Comprehensive test suite for new switch statistics CLI
tests/show_test.py	Added tests for switch counter CLI integration
tests/portstat_test.py	Updated to handle new trimming counter fields
Mock data files	Updated to include new SAI counter values for testing

Comments suppressed due to low confidence (1)

utilities_common/portstat.py:47

• The global constant BUCKET_NUM has been removed but there are still references to it in comments. Consider updating line 47 comment to reflect that the bucket count is now dynamically calculated using len(counter_bucket_dict).

The order and count of statistics mentioned below needs to be in sync with the values in portstat script

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[nazariig]

@qiluo-msft review comments are handled. Can you please help to merge?

[r12f]

hi @nazariig , do you mind to help us with a manual cherry pick?

[nazariig]

hi @nazariig , do you mind to help us with a manual cherry pick?

@r12f done

[yejianquan]

Remove 202505 request label since packet trimming feature won't be included into 202505 branch.