Summary:
Test in TestNN is failing during PyTorch unit test execution on CPU platform.

Test Class: test/test_nn.py::TestNN
Number of Failing Tests: 1
Platform: CPU
Test Type: Unit Test

Version Information:

• PyTorch Commit: 6bdd8c9
• Branch: main
• Test Date: 2026-01-14
• Sprint: Sprint 24

Failure Pattern:
Single root cause - tensor comparison failure in LSTM partial flat weights test

Common Error:

AssertionError: Tensor-likes are not close!

Mismatched elements: 9 / 36 (25.0%)
Greatest absolute difference: 3.0120834708213806e-05 at index (2, 0, 4) (up to 1e-05 allowed)
Greatest relative difference: 0.0030780492816120386 at index (2, 0, 4) (up to 1.3e-06 allowed)

Failing Tests:
1. test_partial_flat_weights

Steps to Reproduce:
1. Run test command:

   TEST_CONFIG=cpu python3 test/run_test.py -i test_nn
   TEST_CONFIG=cuda python3 test/run_test.py -i test_nn
   

2. Observe assertion error

Expected Result:
Test should pass

Actual Result:
Test fails with tensor comparison tolerance error in LSTM partial flat weights

Additional Context:

• Note: sGPU ticket AIPCC-8250 exists for the same test class
• This is the CPU-specific failure

Logs:
Test execution logs: /home/ktanmay/Downloads/Run 1-20260120T060019Z-1-001/Run 1/20260114_024940_commit_6bdd8c9/cpu_tests.log

Priority: P3

Labels: pytorch, unittest, cpu, test_nn, lstm