CopRA: A Progressive LoRA Training Strategy

• URL: http://arxiv.org/abs/2410.22911v1
• Date: Wed, 30 Oct 2024 11:07:09 GMT
• Title: CopRA: A Progressive LoRA Training Strategy
• Authors: Zhan Zhuang, Xiequn Wang, Yulong Zhang, Wei Li, Yu Zhang, Ying Wei,
• Abstract summary: Low-Rank Adaptation (LoRA) is a parameter-efficient technique for fine-tuning foundation models. In this work, we propose a novel progressive training strategy for LoRA with random layer dropping. We refer to this method as Cooperative LoRA (CopRA)
• Score: 9.847045610578073
• License:
• Abstract: Low-Rank Adaptation (LoRA) is a parameter-efficient technique for rapidly fine-tuning foundation models. In standard LoRA training dynamics, models tend to quickly converge to a local optimum near the initialization. However, this local optimum may not be ideal for out-of-distribution data or tasks such as merging and pruning. In this work, we propose a novel progressive training strategy for LoRA with random layer dropping. This strategy also optimizes the Shapley value of LoRA parameters in each layer, treating each layer as a player in a cooperative game. We refer to this method as Cooperative LoRA (CopRA). Our experimental results demonstrate that parameters trained with CopRA exhibit linear mode connectivity, which enables efficient model merging. This also paves the way for federated learning and multi-task learning via LoRA merging. Additionally, by optimizing the Shapley value, CopRA shows superior performance in pruning tasks.

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