Efficiently Programming Large Language Models using SGLang

Authors: Lianmin Zheng, Liangsheng Yin, Zhiqiang Xie, Jeff Huang, Chuyue Sun, Cody Hao Yu, Shiyi Cao, Christos Kozyrakis, Ion Stoica, Joseph E. Gonzalez, Clark Barrett, Ying Sheng

Results of the summarizing process for the arXiv paper: 2312.07104v1

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, , , , The paper introduces SGLang, a Structured Generation Language for Large Language Models (LLMs) that aims to improve the efficiency of programming and execution of LLM applications. LLMs are increasingly used for complex tasks involving multiple generation calls, advanced prompting techniques, control flow, and interaction with external environments. However, existing systems lack efficiency in these areas. <kw>SGLang:</kw> A domain-specific language embedded in Python that provides primitives for common LLM programming patterns. <kw>RadixAttention:</kw> A novel technique proposed by the paper that maintains a Least Recently Used (LRU) cache of Key-Value (KV) pairs in a radix tree, enabling automatic KV cache reuse across multiple generation calls at runtime. <kw>Optimization Techniques:</kw> SGLang incorporates parallelism, batching, caching, sharing, and other compilation techniques to improve execution efficiency. <kw>Simplification:</kw> SGLang simplifies the writing of LLM programs and reduces code complexity while enhancing control. <kw>Efficient Programming and Execution:</kw> This research presents an important contribution towards efficient programming and execution of Large Language Models using SGLang.
AI-generated keywords: SGLang

AI-generated Key Points

  • SGLang: A domain-specific language embedded in Python for LLM programming
  • RadixAttention: A novel technique for automatic KV cache reuse in LLM applications
  • Optimization Techniques: Parallelism, batching, caching, sharing, and other compilation techniques in SGLang
  • Simplification: Reduced code complexity and enhanced control in LLM programming with SGLang
  • Efficient Programming and Execution: Contribution towards efficient programming and execution of Large Language Models using SGLang
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Abstract: Large language models (LLMs) are increasingly used for complex tasks requiring multiple chained generation calls, advanced prompting techniques, control flow, and interaction with external environments. However, efficient systems for programming and executing these applications are lacking. To bridge this gap, we introduce SGLang, a Structured Generation Language for LLMs. SGLang is designed for the efficient programming of LLMs and incorporates primitives for common LLM programming patterns. We have implemented SGLang as a domain-specific language embedded in Python, and we developed an interpreter, a compiler, and a high-performance runtime for SGLang. These components work together to enable optimizations such as parallelism, batching, caching, sharing, and other compilation techniques. Additionally, we propose RadixAttention, a novel technique that maintains a Least Recently Used (LRU) cache of the Key-Value (KV) cache for all requests in a radix tree, enabling automatic KV cache reuse across multiple generation calls at runtime. SGLang simplifies the writing of LLM programs and boosts execution efficiency. Our experiments demonstrate that SGLang can speed up common LLM tasks by up to 5x, while reducing code complexity and enhancing control.

Submitted to arXiv on 12 Dec. 2023

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