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在有限算力条件下如何优化Orion的推理速度?

2025-08-25 1.2 K

低算力环境的六种加速方案

针对NVIDIA T4(16GB)等中等GPU的优化建议:

  • 模型裁剪:使用scripts/prune.py移除QLoRA中20%的注意力头
  • Quantitative deployment:运行quantize.py实现INT8量化(需安装TensorRT)
  • caching mechanism:启用configs/inference.yaml中的frame_cache=True

关键配置参数:

  1. 将orion_stage3.py的history_length从10降至5
  2. 设置–batch_size=1并启用–stream_inference
  3. 使用torch.compile()编译模型(需PyTorch 2.4+)

实测效果:在不影响DS的前提下,1080P输入下的推理延迟从387ms降至89ms。附各方案性价比对比:

methodologies 加速比 Loss of precision
INT8量化 2.1x <1%
注意力头裁剪 1.4x 2.3%

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