LLM Inference Distributed

Source https://github.com/NVIDIA/TensorRT-LLM/tree/main/examples/llm-api/llm_inference_distributed.py.

### Distributed LLM Generation
from tensorrt_llm import LLM, SamplingParams


def main():
    # model could accept HF model name or a path to local HF model.
    llm = LLM(
        model="TinyLlama/TinyLlama-1.1B-Chat-v1.0",
        # Enable 2-way tensor parallelism
        tensor_parallel_size=2
        # Enable 2-way pipeline parallelism if needed
        # pipeline_parallel_size=2
    )

    # Sample prompts.
    prompts = [
        "Hello, my name is",
        "The president of the United States is",
        "The capital of France is",
        "The future of AI is",
    ]

    # Create a sampling params.
    sampling_params = SamplingParams(temperature=0.8, top_p=0.95)

    for output in llm.generate(prompts, sampling_params):
        print(
            f"Prompt: {output.prompt!r}, Generated text: {output.outputs[0].text!r}"
        )

    # Got output like
    # Prompt: 'Hello, my name is', Generated text: '\n\nJane Smith. I am a student pursuing my degree in Computer Science at [university]. I enjoy learning new things, especially technology and programming'
    # Prompt: 'The president of the United States is', Generated text: 'likely to nominate a new Supreme Court justice to fill the seat vacated by the death of Antonin Scalia. The Senate should vote to confirm the'
    # Prompt: 'The capital of France is', Generated text: 'Paris.'
    # Prompt: 'The future of AI is', Generated text: 'an exciting time for us. We are constantly researching, developing, and improving our platform to create the most advanced and efficient model available. We are'


# Due to the requirement of the underlying mpi4py, for multi-gpu, the main function must be placed inside the
# `if __name__ == '__main__':` block.
# Refer to https://mpi4py.readthedocs.io/en/stable/mpi4py.futures.html#mpipoolexecutor
if __name__ == '__main__':
    main()