Summary:
Test in TritonTensorDescriptorTestCUDA is failing during PyTorch unit test execution on CPU platform with timeout.

Test Class: inductor/test_torchinductor_strided_blocks.py::TritonTensorDescriptorTestCUDA
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 - test timeout (command exceeded 30 minutes)

Common Error:

inductor/test_torchinductor_strided_blocks.py::TritonTensorDescriptorTestCUDA::test_2d_reduction_multi_kernel_cuda Command took >30min, returning 124
Got exit code 124

Failing Tests:
1. test_2d_reduction_multi_kernel_cuda

Steps to Reproduce:
1. Run test command:

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

2. Observe test timeout after 30 minutes

Expected Result:
Test should complete within timeout period

Actual Result:
Test hangs and times out after 30 minutes with exit code 124

Root Cause Analysis:
The test is timing out on CPU platform. This is likely because:

• The test is designed for CUDA/GPU but is being run on CPU
• Triton tensor descriptor operations are not optimized or supported on CPU
• Test may be stuck in an infinite loop or very slow computation on CPU

Potential Solutions:
1. Skip this test on CPU platform (add platform check)
2. Investigate why CUDA-specific test is running on CPU
3. Add shorter timeout for CPU platform
4. Fix test to properly detect and handle CPU environment

Additional Context:

• Note: sGPU ticket AIPCC-8264 exists for the same test class
• This is the CPU-specific failure
• Test class name includes "CUDA" suggesting it should only run on GPU
• Exit code 124 indicates timeout

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, inductor, triton, timeout