0284801fbd
* Set BIGDL_IMPORT_IPEX default to true, i.e., auto import IPEX for XPU. * Remove import intel_extension_for_pytorch as ipex from GPU example. * Add support for bigdl-core-xe-21.
70 lines
3 KiB
Python
70 lines
3 KiB
Python
#
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# Copyright 2016 The BigDL Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import torch
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import time
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import argparse
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from bigdl.llm.transformers import AutoModelForCausalLM
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from transformers import LlamaTokenizer
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# you could tune the prompt based on your own model,
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# here the prompt tuning refers to https://github.com/lm-sys/FastChat/blob/main/docs/vicuna_weights_version.md#example-prompt-weights-v0
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Vicuna_PROMPT_FORMAT = "### Human:\n{prompt} \n ### Assistant:\n"
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(description='Predict Tokens using `generate()` API for Vicuna model')
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parser.add_argument('--repo-id-or-model-path', type=str, default="lmsys/vicuna-13b-v1.3",
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help='The huggingface repo id for the Vicuna (e.g. `lmsys/vicuna-13b-v1.3` and `eachadea/vicuna-7b-1.1`) to be downloaded'
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', or the path to the huggingface checkpoint folder')
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parser.add_argument('--prompt', type=str, default="What is AI?",
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help='Prompt to infer')
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parser.add_argument('--n-predict', type=int, default=32,
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help='Max tokens to predict')
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args = parser.parse_args()
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model_path = args.repo_id_or_model_path
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# Load model in 4 bit,
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# which convert the relevant layers in the model into INT4 format
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model = AutoModelForCausalLM.from_pretrained(model_path,
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load_in_4bit=True)
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model = model.to('xpu')
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# Load tokenizer
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tokenizer = LlamaTokenizer.from_pretrained(model_path)
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# Generate predicted tokens
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with torch.inference_mode():
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prompt = Vicuna_PROMPT_FORMAT.format(prompt=args.prompt)
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input_ids = tokenizer.encode(prompt, return_tensors="pt").to('xpu')
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st = time.time()
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# enabling `use_cache=True` allows the model to utilize the previous
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# key/values attentions to speed up decoding;
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# to obtain optimal performance with BigDL-LLM INT4 optimizations,
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# it is important to set use_cache=True for vicuna-v1.3 models
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output = model.generate(input_ids,
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use_cache=True,
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max_new_tokens=args.n_predict)
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torch.xpu.synchronize()
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end = time.time()
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output = output.cpu()
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output_str = tokenizer.decode(output[0], skip_special_tokens=True)
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print(f'Inference time: {end-st} s')
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print('-'*20, 'Prompt', '-'*20)
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print(prompt)
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print('-'*20, 'Output', '-'*20)
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print(output_str)
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