vLLM凭什么这么快?揭秘大模型推理的内存与调度黑科技 episode artwork

EPISODE · Jul 19, 2025 · 10 MIN

vLLM凭什么这么快?揭秘大模型推理的内存与调度黑科技

from Daily LLM Papers

vLLM 的速度优势并非简单的增量式改进或对个别算子的优化,而是源于对大语言模型推理这一根本问题的系统性重构。它将经典的操作系统设计哲学——如虚拟内存、分页管理和动态进程调度——创造性地应用于一个全新的领域,从而建立了一套全新的、为高吞吐量服务而生的架构蓝图。通过 PagedAttention,vLLM 将 GPU 显存从一块僵化的、连续的资源,转变为一个流动的、可灵活调度的块池,从根源上解决了制约并发能力的内存碎片化问题。在此基础上,连续批处理将推理范式从离散的、阻塞的“批处理”模式,转变为连续的、无阻塞的“流处理”模式,最大限度地压榨了 GPU 的并行计算潜力。前往小宇宙评论区与主播互动

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vLLM凭什么这么快?揭秘大模型推理的内存与调度黑科技

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