将huggingface的大模型转换为safetensor格式

很多huggingface的大语言模型都是pytorch的格式，但是mindie需要safetensor格式，另外mindieservice加载原始的baichuan2-13b的模型出错，后来排查是bfloat16数据格式的问题，所以这次转换要一次性转为float16的格式。

上代码：

import argparse
import os
import torch

def parse_arguments():
    parser = argparse.ArgumentParser()
    parser.add_argument('--model_path',
                        help="model and tokenizer path",
                        default='/data/acltransformer_testdata/weights/llama2/llama-2-70b',
                        )
    return parser.parse_args()


def convert_bin2st_from_pretrained(model_path):
    from transformers import AutoModelForCausalLM
    model = AutoModelForCausalLM.from_pretrained(
        pretrained_model_name_or_path=model_path,
        low_cpu_mem_usage=True,
        trust_remote_code=True,
        torch_dtype=torch.float16)  #这里指定float16格式
    #safe_serialization=True会保存为safetensor格式
    model.save_pretrained(model_path, safe_serialization=True)


if __name__ == '__main__':
    args = parse_arguments()

    print(f"covert  {args.model_path} into safetensor")
    convert_bin2st_from_pretrained(args.model_path)

使用方式：

python convert.py --model_path /home/model/Baichuan2-13B-Chat/

执行完毕后：

# ls /home/model/Baichuan2-13B-Chat/ -lh
total 52G
-rw-r--r-- 1 root root 252K May 17 14:25 'Baichuan2 '$'\346\250\241\345\236\213\347\244\276\345\214\272\350\256\270\345\217\257\345\215\217\350\256\256''.pdf'
-rw-r--r-- 1 root root 199K May 17 14:25 'Community License for Baichuan2 Model.pdf'
-rw-r--r-- 1 root root  18K May 17 14:25  README.md
-rw-r--r-- 1 root root  797 Jun 24 10:37  config.json
-rw-r--r-- 1 root root 1.6K May 17 14:25  configuration_baichuan.py
-rw-r--r-- 1 root root  302 Jun 24 10:37  generation_config.json
-rw-r--r-- 1 root root 3.0K May 17 14:25  generation_utils.py
-rw-r--r-- 1 root root 1.1K May 17 14:25  handler.py
-rw-r----- 1 root root 9.3G Jun 24 10:38  model-00001-of-00003.safetensors
-rw-r----- 1 root root 9.3G Jun 24 10:38  model-00002-of-00003.safetensors
-rw-r----- 1 root root 7.4G Jun 24 10:38  model-00003-of-00003.safetensors
-rw-r----- 1 root root  23K Jun 24 10:38  model.safetensors.index.json
-rw-r--r-- 1 root root  33K May 17 14:25  modeling_baichuan.py
-rw-r--r-- 1 root root 9.3G May 17 14:28  pytorch_model-00001-of-00003.bin
-rw-r--r-- 1 root root 9.3G May 17 14:31  pytorch_model-00002-of-00003.bin
-rw-r--r-- 1 root root 7.4G May 17 14:33  pytorch_model-00003-of-00003.bin
-rw-r--r-- 1 root root  24K May 17 14:25  pytorch_model.bin.index.json
-rw-r--r-- 1 root root 9.2K May 17 14:25  quantizer.py
drwxr-xr-x 2 root root 4.0K Jun 24 10:25  safetensor_fp16
-rw-r--r-- 1 root root  574 May 17 14:25  special_tokens_map.json
-rw-r--r-- 1 root root 8.9K May 17 14:25  tokenization_baichuan.py
-rw-r--r-- 1 root root 2.0M May 17 14:25  tokenizer.model
-rw-r--r-- 1 root root  954 May 17 14:25  tokenizer_config.json