We pretrain RoBERTa on smaller datasets (1M, 10M, 100M, 1B tokens). We release 3 models with lowest perplexities for each pretraining data size out of 25 runs (or 10 in the case of 1B tokens). The pretraining data reproduces that of BERT: We combine English Wikipedia and a reproduction of BookCorpus using texts from smashwords in a ratio of approximately 3:1.
Hyperparameters and Validation Perplexity
The hyperparameters and validation perplexities corresponding to each model are as follows:
The hyperparameters corresponding to model sizes mentioned above are as follows:
Model Size
L
AH
HS
FFN
P
BASE
12
12
768
3072
125M
MED-SMALL
6
8
512
2048
45M
(AH = number of attention heads; HS = hidden size; FFN = feedforward network dimension; P = number of parameters.)
For other hyperparameters, we select:
Peak Learning rate: 5e-4
Warmup Steps: 6% of max steps
Dropout: 0.1
Runs of nyu-mll roberta-base-100M-3 on huggingface.co
46
Total runs
0
24-hour runs
4
3-day runs
10
7-day runs
10
30-day runs
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