#29206 certain model comparison mode failed for bcast op golden function

[dchenTT]

Ticket

Link to Github Issue

Problem description

model comparison mode does not work for sd model, due to bcast op

What's changed

bcast being an old op, no longer being developed. has a strange, not standard broadcast behavior. For example,
in0 = (1, 1, 64, 64)
in1 = (2, 1, 1, 64)
It is legit broadcast, the output should be (2, 1, 64, 64). But the actual bcast op output is (1,1,64, 64). Only H W dim is truly broadcasted and non H W dim is truncated to in0 shape. Also ideally model should not use this behavior as well. But I think it is a historical artifact.

The change is to change golden function to slice to the desired output golden tensor

Checklist

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• New/Existing tests provide coverage for changes

Model tests

If your changes cover model-related code, you should run tests corresponding to affected models and platforms (Single card, T3K, Galaxy). "Choose your pipeline" workflows facilitate running multiple kinds of tests in a single run. Each offers models-mandatory and models-extended presets.
The former includes a minimal set of tests, to be run always. The latter extends that with additional ones - use your best judgement in deciding which is the most appropriate for your PR.

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  • models-mandatory preset (runs: Device perf regressions and Frequent model and ttnn tests)
  • models-extended preset (runs: the mandatory tests, plus Demo and Model perf tests)
  • other selection - specify runs

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  • models-mandatory preset (runs: Unit tests)
  • models-extended preset (runs: the mandatory tests, plus Demo and Model perf tests)
  • other selection - specify runs

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  • models-mandatory preset (runs: Quick tests)
  • models-extended preset (runs: the mandatory tests, plus Demo and Model perf tests)
  • other selection - specify runs

[dchenTT]

/codeowner ping

[tenstorrent-github-bot]

CodeOwners Group Analysis

This PR requires approval from one member of each of the following groups:

Summary: 1 pending groups, 0 approved groups

Group Information:

• ⏳ tenstorrent/metalium-developers-ttnn-core (Team) - Members: Pavlo Hilei, Brian Liu, Joseph Chu, Artem Yerofieiev, Diego Gomez | Pending approval

  📁 Files owned by this team (1 files)

  • ttnn/ttnn/experimental_loader/golden_functions.py

Note: At least one approval from each group is sufficient.