Datasets:
Gresham
commited on
Commit
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Parent(s):
18308c4
delete: remove qlora finetuning script
Browse files- .gitignore +0 -1
- llama-fine-tuning-QLoRA.py +0 -199
.gitignore
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llama-fine-tuning-QLoRA.py
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import os
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# 切换到当前文件所在的目录
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os.chdir(os.path.dirname(__file__))
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# 导入必要的库
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import torch
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import json
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from datasets import Dataset
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from transformers import (
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AutoModelForCausalLM, # 用于加载预训练的语言模型
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AutoTokenizer, # 用于加载与模型相匹配的分词器
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BitsAndBytesConfig, # 用于配置4-bit量化
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HfArgumentParser, # 用于解析命令行参数
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TrainingArguments, # 用于设置训练参数
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pipeline, # 用于创建模型的pipeline
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logging, # 用于记录日志
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)
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from huggingface_hub import hf_hub_download
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from peft import LoraConfig # 用于配置和加载QLoRA模型
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from trl import SFTTrainer # 用于执行监督式微调的Trainer
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# 设置预训练模型的名称
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model_name = "meta-llama/Llama-3.1-8B-Instruct"
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# 设置微调后模型的名称
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new_model = "Llama-3.1-8b-Instruct-fine-tuned"
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# LoRA的注意力维度
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lora_r = 64
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# Alpha参数用于LoRA缩放
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lora_alpha = 16
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# LoRA层的dropout概率
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lora_dropout = 0.1
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# 激活4-bit精度的基础模型加载
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use_4bit = True
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# 4-bit基础模型的计算数据类型
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bnb_4bit_compute_dtype = "float16"
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# 4-bit量化类型(fp4或nf4)
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bnb_4bit_quant_type = "nf4"
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# 激活4-bit基础模型的嵌套量化(双重量化)
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use_nested_quant = False
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# 输出目录,用于存储模型预测和检查点
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output_dir = "./results"
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# 训练周期数
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num_train_epochs = 1
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# 是否启用fp16/bf16训练(在A100上将bf16设置为True)
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fp16 = False
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bf16 = True
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# GPU上每个训练批次的样本数
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per_device_train_batch_size = 4
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# GPU上每个评估批次的样本数
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per_device_eval_batch_size = 4
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# 累积梯度的更新步骤数
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gradient_accumulation_steps = 1
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# 是否启用梯度检查点
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gradient_checkpointing = True
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# 最大梯度归一化(梯度裁剪)
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max_grad_norm = 0.3
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# 初始学习率(AdamW优化器)
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learning_rate = 2e-4
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# 权重衰减,应用于全部layer(不包括bias/LayerNorm的权重)
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weight_decay = 0.001
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# 优化器
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optim = "paged_adamw_32bit"
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# 学习率计划
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lr_scheduler_type = "cosine"
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# 训练步数(覆盖num_train_epochs)
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max_steps = -1
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# 线性预热的步数比率(从0到学习率)
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warmup_ratio = 0.03
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# 按长度分组序列
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group_by_length = True
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# 每X更新步骤保存检查点
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save_steps = 0
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# 每X更新步骤记录日志
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logging_steps = 25
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# SFT参数配置
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# 最大序列长度
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max_seq_length = None
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# 打包多个短示例到同一输入序列以提高效率
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packing = False
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# 将整个模型加载到 GPU 0
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device_map = {"": 0}
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# 加载数据集
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print("Loading dataset...")
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REPO_ID = "TreeAILab/NumericBench"
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dataset_name = 'num_list/num_list_500_per_sample_100_length.json'
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with open(hf_hub_download(repo_id=REPO_ID, filename=dataset_name, repo_type="dataset")) as f:
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dataset = json.load(f)
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fine_tune_dataset = []
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for instance in dataset["data"]:
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prompt = dataset["system_prompt"] + "\n\n" + dataset["description"] + "\nQuestion: " + instance["question"] + "\nData: " + instance["struct_data"]
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answer = instance["answer"]
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completion = f"The answer is {answer}."
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fine_tune_dataset.append({"prompt": prompt, "completion": completion})
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fine_tune_dataset = Dataset.from_list(fine_tune_dataset)
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compute_dtype = getattr(torch, bnb_4bit_compute_dtype)
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bnb_config = BitsAndBytesConfig(
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load_in_4bit=use_4bit,
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bnb_4bit_quant_type=bnb_4bit_quant_type,
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bnb_4bit_compute_dtype=compute_dtype,
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bnb_4bit_use_double_quant=use_nested_quant,
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)
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if compute_dtype == torch.float16 and use_4bit:
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major, _ = torch.cuda.get_device_capability()
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if major >= 8:
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print("GPU支持bfloat16")
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# 加载模型
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model = AutoModelForCausalLM.from_pretrained(
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model_name,
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quantization_config=bnb_config,
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device_map=device_map
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)
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model.config.use_cache = False
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model.config.pretraining_tp = 1
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# 加载分词器
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tokenizer = AutoTokenizer.from_pretrained(model_name, trust_remote_code=True)
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tokenizer.pad_token = tokenizer.eos_token
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tokenizer.padding_side = "right" # 修复fp16训练中的溢出问题
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peft_config = LoraConfig(
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lora_alpha=lora_alpha,
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lora_dropout=lora_dropout,
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r=lora_r,
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bias="none",
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task_type="CAUSAL_LM",
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)
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training_arguments = TrainingArguments(
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output_dir=output_dir,
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num_train_epochs=num_train_epochs,
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per_device_train_batch_size=per_device_train_batch_size,
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gradient_accumulation_steps=gradient_accumulation_steps,
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optim=optim,
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save_steps=save_steps,
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logging_steps=logging_steps,
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learning_rate=learning_rate,
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weight_decay=weight_decay,
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fp16=fp16,
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bf16=bf16,
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max_grad_norm=max_grad_norm,
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max_steps=max_steps,
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warmup_ratio=warmup_ratio,
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group_by_length=group_by_length,
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lr_scheduler_type=lr_scheduler_type,
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report_to="tensorboard",
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)
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# 设置监督式微调参数
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trainer = SFTTrainer(
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model=model,
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train_dataset=fine_tune_dataset,
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peft_config=peft_config,
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dataset_text_field="text",
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max_seq_length=max_seq_length,
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tokenizer=tokenizer,
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args=training_arguments,
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packing=packing,
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)
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# 训练模型
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trainer.train()
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trainer.model.save_pretrained(new_model)
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