[Distributed] Add PipelineDatasetPreprocessor to aviod mem leaks in pipeline parallel #76260
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zhangbo9674
approved these changes
Nov 8, 2025
sneaxiy
approved these changes
Nov 8, 2025
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PR Category
Distributed Strategy
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Description
Pass a local function to forward_backward_pipeline instead of the dataset itself. This prevents the dataset from being passed as a direct argument to forward_backward_pipeline, which would create additional reference counts that cannot be cleared, leading to GPU memory leaks.
pcard-76459
cp from #75446 #76212