Light-PEFT: Lightening Parameter-Efficient Fine-Tuning via Early Pruning

Naibin Gu, Peng Fu, Xiyu Liu, Bowen Shen, Zheng Lin, Weiping Wang


Abstract
Parameter-efficient fine-tuning (PEFT) has emerged as the predominant technique for fine-tuning in the era of large language models. However, existing PEFT methods still have inadequate training efficiency. Firstly, the utilization of large-scale foundation models during the training process is excessively redundant for certain fine-tuning tasks. Secondly, as the model size increases, the growth in trainable parameters of empirically added PEFT modules becomes non-negligible and redundant, leading to inefficiency. To achieve task-specific efficient fine-tuning, we propose the Light-PEFT framework, which includes two methods: Masked Early Pruning of the Foundation Model and Multi-Granularity Early Pruning of PEFT. The Light-PEFT framework allows for the simultaneous estimation of redundant parameters in both the foundation model and PEFT modules during the early stage of training. These parameters can then be pruned for more efficient fine-tuning. We validate our approach on GLUE, SuperGLUE, QA tasks, and various models. With Light-PEFT, parameters of the foundation model can be pruned by up to over 40%, while still controlling trainable parameters to be only 25% of the original PEFT method. Compared to utilizing the PEFT method directly, Light-PEFT achieves training and inference speedup, reduces memory usage, and maintains comparable performance and the plug-and-play feature of PEFT.
Anthology ID:
2024.findings-acl.447
Volume:
Findings of the Association for Computational Linguistics ACL 2024
Month:
August
Year:
2024
Address:
Bangkok, Thailand and virtual meeting
Editors:
Lun-Wei Ku, Andre Martins, Vivek Srikumar
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
7528–7541
Language:
URL:
https://aclanthology.org/2024.findings-acl.447
DOI:
Bibkey:
Cite (ACL):
Naibin Gu, Peng Fu, Xiyu Liu, Bowen Shen, Zheng Lin, and Weiping Wang. 2024. Light-PEFT: Lightening Parameter-Efficient Fine-Tuning via Early Pruning. In Findings of the Association for Computational Linguistics ACL 2024, pages 7528–7541, Bangkok, Thailand and virtual meeting. Association for Computational Linguistics.
Cite (Informal):
Light-PEFT: Lightening Parameter-Efficient Fine-Tuning via Early Pruning (Gu et al., Findings 2024)
Copy Citation:
PDF:
https://aclanthology.org/2024.findings-acl.447.pdf