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[Common] Help gc to collect unused model outputs #3643

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Merged
AlexanderDokuchaev merged 3 commits into from
Sep 16, 2025
Merged

[Common] Help gc to collect unused model outputs #3643

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[Common] Help gc to collect unused model outputs
daniil-lyakhov Aug 28, 2025
54c689e
Update aggregator.py
daniil-lyakhov Aug 28, 2025
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daniil-lyakhov Sep 16, 2025
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5 changes: 5 additions & 0 deletions src/nncf/common/tensor_statistics/aggregator.py
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Expand Up @@ -86,6 +86,11 @@ def collect_statistics(self, model: TModel, graph: NNCFGraph) -> None:
outputs = engine.infer(input_data)
processed_outputs = self._process_outputs(outputs)
self._register_statistics(processed_outputs, merged_statistics)
# Manually dereference output tensors to hint gc to remove them. Without it,
# the processed_outputs and outputs remain during model inference,
# increasing the peak memory consumption.
del processed_outputs
del outputs
processed_samples += 1
if processed_samples == 0:
raise nncf.ValidationError(EMPTY_DATASET_ERROR)
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