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refactor tests and align test results on torch 2.10.0 and cu13#248

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refactor tests and align test results on torch 2.10.0 and cu13#248
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This pull request refactors the test suites for the Qwen image pipelines to use the unified DiffSynthEngine interface and configuration objects, and adds parallelism and FSDP (Fully Sharded Data Parallel) test coverage. The changes improve consistency, extensibility, and maintainability of the tests, while also ensuring GPU memory is properly released after each test class.

Test pipeline refactoring and improvements:

  • All Qwen image pipeline tests now use DiffSynthEngine with QwenImagePipelineConfig instead of individual pipeline classes, improving consistency and future extensibility. (tests/test_pipelines/test_qwen_image.py, tests/test_pipelines/test_qwen_image_edit.py, tests/test_pipelines/test_qwen_image_edit_plus_2509.py, tests/test_pipelines/test_qwen_image_edit_plus_2511.py, tests/test_pipelines/test_qwen_image_layered.py) [1] [2] [3] [4] [5]

  • The .generate() method of DiffSynthEngine replaces direct pipeline calls, standardizing how image generation and editing are invoked in all tests. [1] [2] [3] [4] [5]

Parallelism and FSDP test coverage:

  • Added new test classes for parallel and FSDP execution modes for both image generation and editing, ensuring these distributed features are tested and validated. [1] [2]

Test resource management:

  • All test classes now explicitly delete the engine and clear CUDA memory in tearDownClass, reducing the risk of out-of-memory errors in CI or local runs. [1] [2] [3] [4] [5]

Layered pipeline test adjustments:

  • The layered image test now expects 3 layers instead of 4, and the SSIM threshold for image comparison is slightly relaxed for improved robustness.

Overall, these changes modernize and strengthen the test suite for Qwen image pipelines, aligning it with the latest engine interface and distributed features.

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Code Review

This pull request refactors Qwen image pipeline tests to use the unified DiffSynthEngine and QwenImagePipelineConfig, and adds new test cases for parallelism and FSDP. Feedback recommends explicitly calling engine.shutdown() in teardown methods for resource cleanup and requests clarification on the reduction of layers and threshold adjustments in the layered image test.

@classmethod
def tearDownClass(cls):
del cls.pipe
del cls.engine
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medium

Explicitly calling cls.engine.shutdown() before deleting the engine is recommended to ensure that worker processes are terminated immediately and resources (like GPU memory and multiprocessing pipes) are released. Relying solely on del and garbage collection can be unreliable in some environments, potentially leading to resource leaks or port conflicts in subsequent tests.

Suggested change
del cls.engine
cls.engine.shutdown()
del cls.engine


@classmethod
def tearDownClass(cls):
del cls.engine
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medium

Explicitly calling cls.engine.shutdown() before deleting the engine is recommended to ensure that worker processes are terminated immediately and resources are released.

Suggested change
del cls.engine
cls.engine.shutdown()
del cls.engine


@classmethod
def tearDownClass(cls):
del cls.engine
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medium

Explicitly calling cls.engine.shutdown() before deleting the engine is recommended to ensure that worker processes are terminated immediately and resources are released.

Suggested change
del cls.engine
cls.engine.shutdown()
del cls.engine

@classmethod
def tearDownClass(cls):
del cls.pipe
del cls.engine
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medium

Explicitly calling cls.engine.shutdown() before deleting the engine is recommended to ensure that worker processes are terminated immediately and resources are released.

Suggested change
del cls.engine
cls.engine.shutdown()
del cls.engine


@classmethod
def tearDownClass(cls):
del cls.engine
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medium

Explicitly calling cls.engine.shutdown() before deleting the engine is recommended to ensure that worker processes are terminated immediately and resources are released.

Suggested change
del cls.engine
cls.engine.shutdown()
del cls.engine

@classmethod
def tearDownClass(cls):
del cls.pipe
del cls.engine
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medium

Explicitly calling cls.engine.shutdown() before deleting the engine is recommended to ensure that worker processes are terminated immediately and resources are released.

Suggested change
del cls.engine
cls.engine.shutdown()
del cls.engine

@classmethod
def tearDownClass(cls):
del cls.pipe
del cls.engine
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Contributor

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medium

Explicitly calling cls.engine.shutdown() before deleting the engine is recommended to ensure that worker processes are terminated immediately and resources are released.

Suggested change
del cls.engine
cls.engine.shutdown()
del cls.engine

@classmethod
def tearDownClass(cls):
del cls.pipe
del cls.engine
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Contributor

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medium

Explicitly calling cls.engine.shutdown() before deleting the engine is recommended to ensure that worker processes are terminated immediately and resources are released.

Suggested change
del cls.engine
cls.engine.shutdown()
del cls.engine

num_inference_steps=50,
true_cfg_scale=4.0,
layers=4,
layers=3,
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medium

The number of layers has been reduced from 4 to 3, which is also reflected in the assertion on line 40. Since 4 is the default value for the layers parameter in QwenImageLayeredPipeline, could you clarify why the test was changed to use 3 layers? If this was done to align with changed model behavior on Torch 2.10.0, it might be masking a regression in the model's ability to produce the expected number of layers.

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