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September 6, 2023 10:05
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import os | |
import torch | |
from transformers import AutoModelForCausalLM, AutoTokenizer, TrainingArguments,BitsAndBytesConfig | |
from datasets import load_dataset | |
from trl import SFTTrainer | |
from peft import AutoPeftModelForCausalLM, LoraConfig, get_peft_model, prepare_model_for_kbit_training | |
from utils import find_all_linear_names, print_trainable_parameters | |
output_dir="./results" | |
model_name ="codellama/CodeLlama-34b-hf" | |
dataset = load_dataset('timdettmers/openassistant-guanaco', split="train") | |
bnb_config = BitsAndBytesConfig( | |
load_in_4bit=True, | |
bnb_4bit_quant_type="nf4", | |
bnb_4bit_compute_dtype=torch.bfloat16, | |
bnb_4bit_use_double_quant=True, | |
) | |
base_model = AutoModelForCausalLM.from_pretrained(model_name, torch_dtype=torch.bfloat16, quantization_config=bnb_config) | |
base_model.config.use_cache = False | |
base_model = prepare_model_for_kbit_training(base_model) | |
tokenizer = AutoTokenizer.from_pretrained(model_name) | |
tokenizer.pad_token = tokenizer.eos_token | |
tokenizer.padding_side = "right" # Fix weird overflow issue with fp16 training | |
# Change the LORA hyperparameters accordingly to fit your use case | |
peft_config = LoraConfig( | |
r=32, | |
lora_alpha=16, | |
target_modules=find_all_linear_names(base_model), | |
lora_dropout=0.05, | |
bias="none", | |
task_type="CAUSAL_LM", | |
) | |
base_model = get_peft_model(base_model, peft_config) | |
print_trainable_parameters(base_model) | |
# Parameters for training arguments details => https://github.com/huggingface/transformers/blob/main/src/transformers/training_args.py#L158 | |
training_args = TrainingArguments( | |
per_device_train_batch_size=1, | |
gradient_accumulation_steps=1, | |
gradient_checkpointing =True, | |
max_grad_norm= 0.3, | |
num_train_epochs=3, | |
learning_rate=1e-4, | |
bf16=True, | |
save_total_limit=3, | |
logging_steps=300, | |
output_dir=output_dir, | |
optim="paged_adamw_32bit", | |
lr_scheduler_type="constant", | |
warmup_ratio=0.05, | |
) | |
trainer = SFTTrainer( | |
base_model, | |
train_dataset=dataset, | |
dataset_text_field="text", | |
tokenizer=tokenizer, | |
max_seq_length=512, | |
args=training_args | |
) | |
trainer.train() | |
trainer.save_model(output_dir) | |
output_dir = os.path.join(output_dir, "final_checkpoint") | |
trainer.model.save_pretrained(output_dir) | |
tokenizer.save_pretrained(output_dir) |
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