RecyclableTuning

We have released the code for the most of the main experiments in paper Recyclable Tuning for Lifelong Pre-training, including two recycle methods for adapter-tuning and fine-tuning on $RoBERTa_\texttt{BASE}$.

Dataset and Checkpoint Preparation

We follow the datasets used in Dont't-Stop-Pretraining for domain-related tasks. We also use various other datasets to support our experiment. Please download the dataset you need here and put them under ./dataset. We have upload task ChemProt as an example.

Pre-trained models of $RoBERTa_\texttt{BASE}$ could be downloaded here. The series of models simulate the lifelong pre-training scenario. Please put all the pre-trained models you need under ./pretrained_models.

Pilot Studies

All the scripts for the experiments are in ./run_scripts, while all the hyper-parameters we use are listed in files in ./run_configs. Here we only provide example scripts and example configurations. More experiments can be conducted by changing the scripts and hyper-parameters accordingly.

Also note that we have added some files in the transformers package in order to realize the models' functions. In order to successfully run the experiment, please do not change files in ./transformers. It is based on transformers version 4.18.0.

Normal Tuning

To fine-tune or adapter-tune a model normally, please use the script run.sh. The example script tune the task ChemProt using different seeds. This script provides method to tune arbitrary tasks from arbitrary pre-trained models. Please refer to base_model/task_from_path_template.json in run_configs if you would like to change the default hyper-parameters like learning rate, batch size, etc.

cd run_scripts
bash run.sh

If you would like to perform few-shot tuning, please add the followings to the script first to generate the few-shot dataset:

python dataset/get_few.py \
--seed ${seed} \
--task ${task} \
--shot ${fewnum}

Then, change the dataset paths in the template accordingly before start your tuning.

Direct Apply Delta

To apply the changes during the original training process to a new pre-trained model, please use the script direct_apply_delta.sh. old_plm_path indicates the start model of the previous training process, and it is valid only when performing fine-tuning. applied_name indicates the name of previous tuned model. They will be used to calculate the change ("delta") of model. plm_path indicates the start model of current process, to which the change ("delta") of model will be applied. For more hyper-parameters please refer to direct_delta/direct_delta_template.json in run_configs.

cd run_scripts
bash direct_apply_delta.sh

Interpolation

To interpolate two models and check the evaluation & test scores, please use the scripts check_itp.sh. Indexes 1 and 2 refer to the configurations of two models to be interpolated. plm_path are valid only when performing adapter-tuning, as we need the parameters of model backbones only in adapter-tuning. Interpolation can be performed after we get at least two base models with same size and model configurations. For more hyper-parameters please refer to check_itp/check_itp_template.json in run_configs.

cd run_scripts
bash check_itp.sh

Main Experiments

Distillation

To distill the knowledge of a teacher model to students, please use the script run_scripts.sh. As all our main experiments use few-shot dataset to tune the student, we use fewnum to indicate the few-shot number. The original teacher model is identified by teacher_name and teacher_step. alpha and beta are hyper-parameters to regulate the relative proportions of task loss, distill loss and patience loss, while T refers to the distill temperature. For more hyper-parameters please refer to distill/distill_task_from_path_template.json in run_configs.

cd run_scripts
bash run_distill.sh

Delta Initialization

To apply the tuned model as current training process's initialization, please use the script run_oldinit.sh. oldinit_path, oldinit_step and old_plm_path will help identify the previous tuned model and calculate the change ("delta"), which will be applied to the model from plm_path as initialization. For more hyper-parameters please refer to base_model/task_from_path_oldinit_template.json in run_configs.

cd run_scripts
bash run_oldinit.sh

Combined Method

To combine the "delta" of teacher as initialization and distill knowledge from teacher model, please use the scripts run_distill_oldinit.sh. The meanings of the hyper-parameters are same as those in distillation, and the only change is that the teacher model is applied in current training's initialization. Please refer to distill/distill_task_from_path_oldinit_template.json for more information about the hyper-parameters.

cd run_scripts
bash run_distill_oldinit.sh

Auxiliary Scripts

Calculate L2 Distance

Please use the scripts cal_dist.sh if you want to calculate the L2 distance of two models with same configurations. adapter_model is optional and only valid when calculating the distance between adapter modules.

Acknowledgement

The authors would like to thank anonymous reviewers for their valuable feedbacks.