Hugging Face BlogOct 16, 2024, 12:00 AMimportant 85
修正梯度累積：解決 LLM 微調中常被忽視的數學偏差
Original: Fixing Gradient Accumulation
### The Mathematical Flaw in Traditional Gradient Accumulation Gradient accumulation is an extremely common technique in deep learning…
在微調 LLM 時，梯度累積（Gradient Accumulation）常被用來模擬大 Batch Size。然而，Hugging Face 指出，當訓練樣本長度不一時，傳統「直接除以累積步數」的作法會導致數學上的權重偏差。這篇技術部落格詳細解釋了此問題，並介紹了在 Hugging Face Trainer 中引入的全新修正機制，確保梯度累積與真實大 Batch Size 的訓練結果完全一致。
### The Mathematical Flaw in Traditional Gradient Accumulation
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