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97 lines
4.2 KiB
Python
97 lines
4.2 KiB
Python
1 year ago
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import argparse
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import json
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from typing import Dict
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import logging
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import torch
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import transformers
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from transformers import AutoTokenizer
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from transformers.trainer_pt_utils import LabelSmoother
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from auto_gptq import AutoGPTQForCausalLM, BaseQuantizeConfig
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IGNORE_TOKEN_ID = LabelSmoother.ignore_index
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def preprocess(
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sources,
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tokenizer: transformers.PreTrainedTokenizer,
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max_len: int,
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system_message: str = "You are a helpful assistant."
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) -> Dict:
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roles = {"user": "<|im_start|>user", "assistant": "<|im_start|>assistant"}
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im_start = tokenizer.im_start_id
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im_end = tokenizer.im_end_id
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nl_tokens = tokenizer('\n').input_ids
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_system = tokenizer('system').input_ids + nl_tokens
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_user = tokenizer('user').input_ids + nl_tokens
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_assistant = tokenizer('assistant').input_ids + nl_tokens
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# Apply prompt templates
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data = []
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# input_ids, targets = [], []
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for i, source in enumerate(sources):
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source = source["conversations"]
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if roles[source[0]["from"]] != roles["user"]:
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source = source[1:]
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input_id, target = [], []
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system = [im_start] + _system + tokenizer(system_message).input_ids + [im_end] + nl_tokens
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input_id += system
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target += [im_start] + [IGNORE_TOKEN_ID] * (len(system)-3) + [im_end] + nl_tokens
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assert len(input_id) == len(target)
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for j, sentence in enumerate(source):
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role = roles[sentence["from"]]
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_input_id = tokenizer(role).input_ids + nl_tokens + \
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tokenizer(sentence["value"]).input_ids + [im_end] + nl_tokens
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input_id += _input_id
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if role == '<|im_start|>user':
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_target = [im_start] + [IGNORE_TOKEN_ID] * (len(_input_id)-3) + [im_end] + nl_tokens
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elif role == '<|im_start|>assistant':
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_target = [im_start] + [IGNORE_TOKEN_ID] * len(tokenizer(role).input_ids) + \
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_input_id[len(tokenizer(role).input_ids)+1:-2] + [im_end] + nl_tokens
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else:
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raise NotImplementedError
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target += _target
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assert len(input_id) == len(target)
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input_id = torch.tensor(input_id[:max_len], dtype=torch.int)
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target = torch.tensor(target[:max_len], dtype=torch.int)
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data.append(dict(input_ids=input_id, attention_mask=input_id.ne(tokenizer.pad_token_id)))
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return data
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if __name__ == "__main__":
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parser = argparse.ArgumentParser("Model Quantization using AutoGPTQ")
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parser.add_argument("--model_name_or_path", type=str, help="model path")
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parser.add_argument("--data_path", type=str, help="calibration data path")
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parser.add_argument("--out_path", type=str, help="output path of the quantized model")
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parser.add_argument("--max_len", type=int, default=8192, help="max length of calibration data")
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parser.add_argument("--bits", type=int, default=4, help="the bits of quantized model. 4 indicates int4 models.")
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parser.add_argument("--group-size", type=int, default=128, help="the group size of quantized model")
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args = parser.parse_args()
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quantize_config = BaseQuantizeConfig(
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bits=args.bits,
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group_size=args.group_size,
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damp_percent=0.01,
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desc_act=False, # set to False can significantly speed up inference but the perplexity may slightly bad
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static_groups=False,
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sym=True,
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true_sequential=True,
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model_name_or_path=None,
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model_file_base_name="model"
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)
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tokenizer = AutoTokenizer.from_pretrained(args.model_name_or_path, trust_remote_code=True)
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tokenizer.pad_token_id = tokenizer.eod_id
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data = preprocess(json.load(open(args.data_path)), tokenizer, args.max_len)
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model = AutoGPTQForCausalLM.from_pretrained(args.model_name_or_path, quantize_config, device_map="auto", trust_remote_code=True)
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logging.basicConfig(
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format="%(asctime)s %(levelname)s [%(name)s] %(message)s", level=logging.INFO, datefmt="%Y-%m-%d %H:%M:%S"
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)
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model.quantize(data, cache_examples_on_gpu=False)
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model.save_quantized(args.out_path, use_safetensors=True)
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tokenizer.save_pretrained(args.out_path)
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