# This script is based on examples/delora_finetuning/delora_finetuning.py import os import torch from datasets import load_dataset from transformers import ( AutoModelForCausalLM, AutoTokenizer, DataCollatorForLanguageModeling, Trainer, TrainingArguments, ) from peft import DeftConfig, get_peft_model def train_model( base_model: str, data_path: str, output_dir: str, batch_size: int, num_epochs: int, learning_rate: float, cutoff_len: int, val_set_size: int, eval_step: int, save_step: int, device: str, rank: int, alpha: int, decomposition_method: str, deft_dropout: float, target_modules: str, hub_model_id: str, push_to_hub: bool, ): os.environ["TOKENIZERS_PARALLELISM"] = "false" hf_token = os.getenv("HF_TOKEN") # Setup device device = torch.device(device) print(f"Using device: {device}") # load tokenizer tokenizer = AutoTokenizer.from_pretrained(base_model, token=hf_token) # Compute type device_type = device.type device_module = getattr(torch, device_type, torch.cuda) bf16_supported = device_module.is_available() and device_module.is_bf16_supported() dtype = torch.bfloat16 if bf16_supported else torch.float32 # Load the base model model = AutoModelForCausalLM.from_pretrained( base_model, dtype=dtype, ) # DEFT config for the PEFT model peft_config = DeftConfig( r=rank, alpha=alpha, decomposition_method=decomposition_method, target_modules=(target_modules.split(",") if target_modules else None), deft_dropout=deft_dropout, bias="none", ) # get the peft model with DEFT config model = get_peft_model(model, peft_config) model.to(device) # MODEL TO ACCELERATOR tokenizer.pad_token = tokenizer.eos_token # Load the dataset dataset = load_dataset(data_path) def tokenize_function(examples): inputs = tokenizer(examples["text"], padding="max_length", truncation=True, max_length=cutoff_len) inputs["labels"] = inputs["input_ids"].copy() # setting labels for a language modeling task return inputs # Tokenize the dataset and prepare for training tokenized_datasets = dataset.map(tokenize_function, batched=True, remove_columns=dataset["train"].column_names) # Data collator to dynamically pad the batched examples data_collator = DataCollatorForLanguageModeling(tokenizer, mlm=False) # Compute the total amount of training step for warmup max_steps = int((len(dataset) // batch_size) * num_epochs) # Define training arguments training_args = TrainingArguments( output_dir=output_dir, num_train_epochs=num_epochs, per_device_train_batch_size=batch_size, per_device_eval_batch_size=batch_size, warmup_steps=int(max_steps * 0.1), # 10% of total training steps weight_decay=0.0, logging_steps=eval_step, save_steps=save_step, save_total_limit=2, push_to_hub=push_to_hub, hub_model_id=hub_model_id, gradient_accumulation_steps=16, learning_rate=learning_rate, hub_token=hf_token, label_names=["labels"], ) # Clear accelerator cache to free memory device_module.empty_cache() # Initialize the Trainer trainer = Trainer( model=model, args=training_args, train_dataset=tokenized_datasets["train"], eval_dataset=tokenized_datasets["test"], data_collator=data_collator, ) # Start model training trainer.train() # Save and push the trained model and tokenizer if push_to_hub: # Push the main model to the hub trainer.push_to_hub(commit_message="Fine-tuned model") # Save the model and tokenizer locally model.save_pretrained(output_dir) tokenizer.save_pretrained(output_dir) if __name__ == "__main__": import argparse parser = argparse.ArgumentParser(description="Fine-tune a causal LM with DEFT") parser.add_argument("--base_model", type=str, default="huggyllama/llama-7b", help="Base model path or name") parser.add_argument( "--data_path", type=str, default="timdettmers/openassistant-guanaco", help="Dataset path or name" ) parser.add_argument( "--output_dir", type=str, default="path/to/output", help="Output directory for the fine-tuned model" ) parser.add_argument("--batch_size", type=int, default=1, help="Batch size") parser.add_argument("--num_epochs", type=int, default=1, help="Number of training epochs") parser.add_argument("--learning_rate", type=float, default=3e-4, help="Learning rate") parser.add_argument("--cutoff_len", type=int, default=512, help="Cutoff length for tokenization") parser.add_argument("--val_set_size", type=int, default=500, help="Validation set size") parser.add_argument("--eval_step", type=int, default=10, help="Evaluation step interval") parser.add_argument("--save_step", type=int, default=100, help="Save step interval") parser.add_argument("--device", type=str, default="auto", help="Device to use for training") parser.add_argument("--rank", type=int, default=32, help="DEFT projection/injection rank") parser.add_argument("--alpha", type=int, default=64, help="DEFT injection scaling (applied as alpha / rank)") parser.add_argument( "--decomposition_method", type=str, default="relu", choices=["relu", "qr"], help="How the projector is derived from P: 'relu' (default) or 'qr'", ) parser.add_argument("--deft_dropout", type=float, default=0.05, help="DEFT dropout rate") parser.add_argument( "--target_modules", type=str, default=None, help="Comma-separated list of target modules for DEFT" ) parser.add_argument( "--hub_model_id", type=str, default="path/to/repo", help="Repository name to push the model on the Hugging Face Hub", ) parser.add_argument("--push_to_hub", action="store_true", help="Whether to push the model to Hugging Face Hub") args = parser.parse_args() if args.device == "auto": args.device = torch.accelerator.current_accelerator().type if hasattr(torch, "accelerator") else "cuda" train_model( base_model=args.base_model, data_path=args.data_path, output_dir=args.output_dir, batch_size=args.batch_size, num_epochs=args.num_epochs, learning_rate=args.learning_rate, cutoff_len=args.cutoff_len, val_set_size=args.val_set_size, eval_step=args.eval_step, save_step=args.save_step, device=args.device, rank=args.rank, alpha=args.alpha, decomposition_method=args.decomposition_method, deft_dropout=args.deft_dropout, target_modules=args.target_modules, hub_model_id=args.hub_model_id, push_to_hub=args.push_to_hub, )