LLM Quantization

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

 1### Generation with Quantization
 2import logging
 3
 4import torch
 5
 6from tensorrt_llm import LLM, SamplingParams
 7from tensorrt_llm.hlapi import QuantAlgo, QuantConfig
 8
 9major, minor = torch.cuda.get_device_capability()
10post_ada = major > 8 or (major == 8 and minor >= 9)
11
12quant_configs = [
13    QuantConfig(quant_algo=QuantAlgo.W4A16_AWQ),
14]
15
16if post_ada:
17    quant_configs.append(
18        QuantConfig(quant_algo=QuantAlgo.FP8,
19                    kv_cache_quant_algo=QuantAlgo.FP8))
20else:
21    logging.error(
22        "FP8 quantization only works on post-ada GPUs, skipped in the example.")
23
24for quant_config in quant_configs:
25
26    llm = LLM(
27        model="TinyLlama/TinyLlama-1.1B-Chat-v1.0",
28        # define the quantization config to trigger built-in end-to-end quantization.
29        quant_config=quant_config)
30
31    # Sample prompts.
32    prompts = [
33        "Hello, my name is",
34        "The president of the United States is",
35        "The capital of France is",
36        "The future of AI is",
37    ]
38
39    # Create a sampling params.
40    sampling_params = SamplingParams(temperature=0.8, top_p=0.95)
41
42    for output in llm.generate(prompts, sampling_params):
43        print(
44            f"Prompt: {output.prompt!r}, Generated text: {output.outputs[0].text!r}"
45        )
46
47# Got output like
48# Prompt: 'Hello, my name is', Generated text: 'Jane Smith. I am a resident of the city. Can you tell me more about the public services provided in the area?'
49# Prompt: 'The president of the United States is', Generated text: 'considered the head of state, and the vice president of the United States is considered the head of state. President and Vice President of the United States (US)'
50# Prompt: 'The capital of France is', Generated text: 'located in Paris, France. The population of Paris, France, is estimated to be 2 million. France is home to many famous artists, including Picasso'
51# Prompt: 'The future of AI is', Generated text: 'an open and collaborative project. The project is an ongoing effort, and we invite participation from members of the community.\n\nOur community is'