OSDI Paper: vLLM and Others Unsuitable for Long-Running Coding Agents

AccBalanced · x · 2026-07-19

At USENIX OSDI, researchers from UW and UVA presented a paper on tuning vLLM for coding agents. - **Background**: They collected the most comprehensive Claude Code OS-level tracing dataset from their student labs. - **Core Finding**: Existing serving frameworks like vLLM and SGLang cannot directly handle long-running agent workloads. - **Technical Detail**: If KV cache is constrained, more CPU scheduling overhead is needed to predict cache reuse in long coding sessions.

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