mirror of https://github.com/hpcaitech/ColossalAI
76 lines
3.0 KiB
Python
76 lines
3.0 KiB
Python
import argparse
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import torch.distributed as dist
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from transformers import LlamaForCausalLM, LlamaTokenizer
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import colossalai
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from colossalai.inference import InferenceEngine
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from colossalai.testing import spawn
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from colossalai.utils.device import get_current_device
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INPUT_TEXTS = [
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"What is the longest river in the world?",
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"Explain the difference between process and thread in compouter science.",
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]
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def run_inference(args):
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model_name_or_path = args.model_name_or_path
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max_input_len = args.max_input_len
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max_output_len = args.max_output_len
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max_batch_size = args.batch_size
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micro_batch_size = args.micro_batch_size
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tp_size = args.tp_size
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pp_size = args.pp_size
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rank = dist.get_rank()
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tokenizer = LlamaTokenizer.from_pretrained(model_name_or_path, padding_side="left")
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tokenizer.pad_token_id = tokenizer.eos_token_id
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model = LlamaForCausalLM.from_pretrained(model_name_or_path, pad_token_id=tokenizer.pad_token_id)
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engine = InferenceEngine(
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tp_size=tp_size,
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pp_size=pp_size,
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model=model,
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max_input_len=max_input_len,
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max_output_len=max_output_len,
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max_batch_size=max_batch_size,
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micro_batch_size=micro_batch_size,
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dtype=args.dtype,
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)
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inputs = tokenizer(INPUT_TEXTS, return_tensors="pt", padding="longest", max_length=max_input_len, truncation=True)
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inputs = {k: v.to(get_current_device()) for k, v in inputs.items()}
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outputs = engine.generate(inputs)
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if rank == 0:
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output_texts = tokenizer.batch_decode(outputs, skip_special_tokens=True)
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for input_text, output_text in zip(INPUT_TEXTS, output_texts):
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print(f"\n[Input]:\n {input_text}")
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print(f"[Output]:\n {output_text}")
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def run_tp_pipeline_inference(rank, world_size, port, args):
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colossalai.launch(config={}, rank=rank, world_size=world_size, host="localhost", port=port, backend="nccl")
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run_inference(args)
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if __name__ == "__main__":
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"-m", "--model_name_or_path", type=str, help="Model name from huggingface or local path", default=None
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)
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parser.add_argument("-i", "--input", default="What is the longest river in the world?")
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parser.add_argument("-t", "--tokenizer_path", type=str, help="Tokenizer path", default=None)
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parser.add_argument("--tp_size", type=int, default=1, help="Tensor parallel size")
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parser.add_argument("--pp_size", type=int, default=1, help="Pipeline parallel size")
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parser.add_argument("-b", "--batch_size", type=int, default=4, help="Maximum batch size")
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parser.add_argument("--max_input_len", type=int, default=2048, help="Maximum input length")
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parser.add_argument("--max_output_len", type=int, default=64, help="Maximum output length")
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parser.add_argument("--micro_batch_size", type=int, default=1, help="Micro batch size")
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parser.add_argument("--dtype", default="fp16", type=str)
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args = parser.parse_args()
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spawn(run_tp_pipeline_inference, nprocs=args.tp_size * args.pp_size, args=args)
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