bert-mini-finetuned-mnli EU AI Act Compliance Profile

BERT-mini model finetuned with M-FAC

This model is finetuned on MNLI dataset with state-of-the-art second-order optimizer M-FAC. Check NeurIPS 2021 paper for more details on M-FAC: https://arxiv.org/pdf/2107.03356.pdf.

Finetuning setup

For fair comparison against default Adam baseline, we finetune the model in the same framework as described here https://github.com/huggingface/transformers/tree/master/examples/pytorch/text-classification and just swap Adam optimizer with M-FAC. Hyperparameters used by M-FAC optimizer:

learning rate = 1e-4
number of gradients = 1024
dampening = 1e-6

Results

We share the best model out of 5 runs with the following score on MNLI validation set:

matched_accuracy = 75.13
mismatched_accuracy = 75.93

Mean and standard deviation for 5 runs on MNLI validation set:

| | Matched Accuracy | Mismatched Accuracy | |:-----:|:----------------:|:-------------------:| | Adam | 73.30 ± 0.20 | 74.85 ± 0.09 | | M-FAC | 74.59 ± 0.41 | 75.95 ± 0.14 |

Results can be reproduced by adding M-FAC optimizer code in https://github.com/huggingface/transformers/blob/master/examples/pytorch/text-classification/run_glue.py and running the following bash script:

CUDA_VISIBLE_DEVICES=0 python run_glue.py \
  --seed 8276 \
  --model_name_or_path prajjwal1/bert-mini \
  --task_name mnli \
  --do_train \
  --do_eval \
  --max_seq_length 128 \
  --per_device_train_batch_size 32 \
  --learning_rate 1e-4 \
  --num_train_epochs 5 \
  --output_dir out_dir/ \
  --optim MFAC \
  --optim_args '{"lr": 1e-4, "num_grads": 1024, "damp": 1e-6}'

We believe these results could be improved with modest tuning of hyperparameters: per_device_train_batch_size, `learn

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