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generate.py
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generate.py
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#
# Copyright 2016 The BigDL Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import torch
import time
import argparse
from ipex_llm.transformers import AutoModelForCausalLM
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Predict Tokens using `generate()` API for MiniCPM model')
parser.add_argument('--repo-id-or-model-path', type=str,
help='The Hugging Face or ModelScope repo id for the MiniCPM model to be downloaded'
', or the path to the checkpoint folder')
parser.add_argument('--prompt', type=str, default="What is AI?",
help='Prompt to infer')
parser.add_argument('--n-predict', type=int, default=32,
help='Max tokens to predict')
parser.add_argument('--modelscope', action="store_true", default=False,
help="Use models from modelscope")
args = parser.parse_args()
if args.modelscope:
from modelscope import AutoTokenizer
model_hub = 'modelscope'
else:
from transformers import AutoTokenizer
model_hub = 'huggingface'
model_path = args.repo_id_or_model_path if args.repo_id_or_model_path else \
("OpenBMB/MiniCPM-2B-sft-bf16" if args.modelscope else "openbmb/MiniCPM-2B-sft-bf16")
# Load model in 4 bit,
# which convert the relevant layers in the model into INT4 format
# When running LLMs on Intel iGPUs for Windows users, we recommend setting `cpu_embedding=True` in the from_pretrained function.
# This will allow the memory-intensive embedding layer to utilize the CPU instead of iGPU.
model = AutoModelForCausalLM.from_pretrained(model_path,
load_in_4bit=True,
trust_remote_code=True,
optimize_model=True,
use_cache=True,
model_hub=model_hub)
model = model.half().to('xpu')
# Load tokenizer
tokenizer = AutoTokenizer.from_pretrained(model_path,
trust_remote_code=True)
# Generate predicted tokens
with torch.inference_mode():
# here the prompt formatting refers to: https://huggingface.co/openbmb/MiniCPM-2B-sft-bf16/blob/79fbb1db171e6d8bf77cdb0a94076a43003abd9e/modeling_minicpm.py#L1320
chat = [
{ "role": "user", "content": args.prompt },
]
prompt = tokenizer.apply_chat_template(chat, tokenize=False, add_generation_prompt=False)
input_ids = tokenizer.encode(prompt, return_tensors="pt").to('xpu')
# ipex_llm model needs a warmup, then inference time can be accurate
output = model.generate(input_ids,
max_new_tokens=args.n_predict)
# start inference
st = time.time()
output = model.generate(input_ids,
do_sample=False,
max_new_tokens=args.n_predict)
torch.xpu.synchronize()
end = time.time()
output_str = tokenizer.decode(output[0], skip_special_tokens=False)
print(f'Inference time: {end-st} s')
print('-'*20, 'Prompt', '-'*20)
print(prompt)
print('-'*20, 'Output', '-'*20)
print(output_str)