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Require the SM100 sync-object factory for custom UMMA pipelines and report actionable dependency errors when it is unavailable or resolves to the generic PipelineAsync implementation. Remove the unused duplicate factory binding. Fixes NVIDIA#18376 Signed-off-by: peaceh <103117813+peaceh-nv@users.noreply.github.com>
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Included review availability: Your plan provides up to 12 included reviews per hour; 10 remain after this review. WalkthroughThe custom Blackwell pipeline now uses the SM100 synchronization factory directly. It raises an actionable ChangesSM100 synchronization factory
Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix · Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to The dependency validation reports a consistent actionable error for unsupported installations while retaining supported SM100 behavior. No unresolved merge-blocking risk is established. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In `@tensorrt_llm/_torch/cute_dsl_kernels/blackwell/custom_pipeline.py`:
- Around line 64-71: The import-time test for custom_pipeline is missing
coverage of SM100 synchronization-factory validation. In the parameterized
module-import test, cover a missing factory and a factory identical to
PipelineAsync._make_sync_object, asserting each raises ImportError with the
SM100 installation guidance, and cover a distinct callable SM100 factory that
imports successfully.
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tensorrt_llm/_torch/cute_dsl_kernels/blackwell/custom_pipeline.py
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Add parameterized import tests for missing, inherited SM90, non-callable, and supported SM100 synchronization factories. Verify unsupported factories raise ImportError with the CuTe DSL installation guidance, and isolate each module load and monkeypatch from the production module cache. Signed-off-by: peaceh <103117813+peaceh-nv@users.noreply.github.com>
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Inline comments:
In `@tests/unittest/_torch/cute_dsl_kernels/test_custom_pipeline.py`:
- Line 34: Add a separate test case for the missing-class scenario by removing
PipelineTmaUmma from sm100, then assert the same actionable ImportError as the
existing missing-member case. Keep the current test unchanged and ensure the new
case specifically exercises absence of the class itself.
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Signed-off-by: peaceh <103117813+peaceh-nv@users.noreply.github.com>
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Require the SM100 sync-object factory for custom UMMA pipelines and report actionable dependency errors when it is unavailable or resolves to the generic PipelineAsync implementation. Remove the unused duplicate factory binding.
Fixes #18376
Dev Engineer Review
Custom UMMA pipelines now require the SM100 synchronization factory. The change removes the fallback to
PipelineAsync._make_sync_objectand raises an actionableImportErrorwhen the SM100 factory is unavailable or unsupported. Supported installations retain the SM100 factory.QA Engineer Review
Modified
tests/unittest/_torch/cute_dsl_kernels/test_custom_pipeline.py. The new parametrized coverage checks a missingPipelineTmaUmmaclass and unsupported factory configurations, while preserving supported-factory checks. No test-list changes are indicated. Coverage verdict: sufficient.Per-File QA Perspective
tensorrt_llm/_torch/cute_dsl_kernels/blackwell/custom_pipeline.py: Verify supported installations use the SM100 factory and unsupported installations fail with the actionable dependency error.tests/unittest/_torch/cute_dsl_kernels/test_custom_pipeline.py: Covers missing-class and factory-selection error paths. Notest-db/or manual-QA list entry is indicated.Description
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