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57 lines
2.5 KiB
57 lines
2.5 KiB
12 months ago
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import argparse
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import os
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import torch
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from colossalai.logging import get_dist_logger
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from transformers import AutoTokenizer, AutoModelForCausalLM
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logger = get_dist_logger()
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def load_model(model_path, device="cuda", **kwargs):
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logger.info(
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"Please check whether the tokenizer and model weights are properly stored in the same folder."
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)
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model = AutoModelForCausalLM.from_pretrained(model_path, **kwargs)
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model.to(device)
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try:
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tokenizer = AutoTokenizer.from_pretrained(model_path)
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except OSError:
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raise ImportError("Tokenizer not found. Please check if the tokenizer exists or the model path is correct.")
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return model, tokenizer
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@torch.inference_mode()
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def generate(args):
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model, tokenizer = load_model(model_path=args.model_path, device=args.device)
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BASE_INFERENCE_SUFFIX = "\n\n->\n\n"
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input_txt = f"{args.input_txt}{BASE_INFERENCE_SUFFIX}"
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inputs = tokenizer(args.input_txt, return_tensors='pt').to(args.device)
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output = model.generate(**inputs,
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max_new_tokens=args.max_new_tokens,
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do_sample=args.do_sample,
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temperature=args.temperature,
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top_k=args.top_k,
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top_p=args.top_p,
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num_return_sequences=1)
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response = tokenizer.decode(output.cpu()[0], skip_special_tokens=True)[len(input_txt):]
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logger.info(f"Question: {input_txt} \n\n Answer: \n{response}")
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return response
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description="Colossal-LLaMA-2 inference Process.")
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parser.add_argument('--model_path', type=str, default="hpcai-tech/Colossal-LLaMA-2-7b-base", help="HF repo name or local path of the model")
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parser.add_argument('--device', type=str, default="cuda:0", help="Set the device")
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parser.add_argument('--max_new_tokens', type=int, default=512, help=" Set maximum numbers of tokens to generate, ignoring the number of tokens in the prompt")
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parser.add_argument('--do_sample', type=bool, default=True, help="Set whether or not to use sampling")
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parser.add_argument('--temperature', type=float, default=0.3, help="Set temperature value")
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parser.add_argument('--top_k', type=int, default=50, help="Set top_k value for top-k-filtering")
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parser.add_argument('--top_p', type=int, default=0.95, help="Set top_p value for generation")
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parser.add_argument('--input_txt', type=str, default="明月松间照，", help="The prompt input to the model")
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args = parser.parse_args()
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generate(args)
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