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Pre-submission checklist

  • I've ran the linters locally and fixed lint errors related to the files I modified in this PR. You can install the linters by running pip install -r requirements-dev.txt && pre-commit install
  • pre-commit run

Summary

The sai_switch_reachability_change_speed benchmark is only applicable to DNX platforms and is not supported on XGS platforms.

Previously, this benchmark was built for all SAI_BRCM_IMPL builds and would hang/crash at runtime when executed on XGS platforms.

This change updates cmake/AgentHwSaiBenchmarks.cmake to conditionally include the benchmark only when:

  • SAI_SDK_VERSION contains "DNX", OR
  • Building with BUILD_SAI_FAKE (same as original code)

This prevents the binary from being built on XGS platforms entirely, avoiding runtime hangs/crashes.

Test Plan

Verified that sai_switch_reachability_change_speed-sai_impl is not built on XGS platform.

… supported platform (DNX) only (facebook#205)

<!-- Thanks for submitting a pull request! We appreciate you spending
the time to work on these changes. Please provide enough information so
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**Pre-submission checklist**
- [x] I've ran the linters locally and fixed lint errors related to the
files I modified in this PR. You can install the linters by running `pip
install -r requirements-dev.txt && pre-commit install`
- [x] `pre-commit run`

# Summary

<!-- Explain the motivation for making this change and any other context
that you think would help reviewers of your code. What existing problem
does the pull request solve? -->

The `sai_switch_reachability_change_speed` benchmark is only applicable
to DNX platforms and is not supported on XGS platforms.

Previously, this benchmark was built for all SAI_BRCM_IMPL builds and
would hang/crash at runtime when executed on XGS platforms.

This change updates `cmake/AgentHwSaiBenchmarks.cmake` to conditionally
include the benchmark only when:

 - SAI_SDK_VERSION contains "DNX", OR
 - Building with BUILD_SAI_FAKE (same as original code)
 
This prevents the binary from being built on XGS platforms entirely,
avoiding runtime hangs/crashes.

# Test Plan
Verified that `sai_switch_reachability_change_speed-sai_impl` is not
built on XGS platform.

<!-- Demonstrate the code is solid. Example: The exact commands you ran
and their output, screenshots / videos if the pull request changes the
user interface. How exactly did you verify that your PR solves the issue
you wanted to solve? -->

<!-- If a relevant Github issue exists for this PR, please make sure you
link that issue to this PR -->
@meta-cla meta-cla bot added the CLA Signed label Dec 9, 2025
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