BlockServe Boosts Diffusion LLM Serving Throughput

Yuanjie Zhu, Liangwei Yang, Ke Xu, Weizhi Zhang, Shanghao Li, Zihe Song, Philip S. Yu· July 13, 2026 View original

Summary

BlockServe introduces a continuous batching framework with block-grained scheduling to improve the efficiency of serving diffusion large language models (dLLMs). It addresses convergence heterogeneity by immediately evicting completed requests, achieving significantly higher throughput than existing methods.

Serving diffusion large language models (dLLMs) efficiently is challenging due to varying convergence rates among batched requests. This "convergence heterogeneity" causes faster requests to wait for slower ones, leading to wasted compute resources and increased latency. Researchers have developed BlockServe, a novel continuous batching framework designed to overcome these limitations. BlockServe integrates block-grained scheduling, which allows for the immediate eviction of completed requests at block boundaries, preventing stragglers from holding up the entire batch. The system also features mixed-state execution, extending dual cache and parallel decoding to handle heterogeneous batches, and a compute-aware admission controller that optimizes batch capacity. Evaluations on various benchmarks show BlockServe achieving 1.9 to 10.6 times higher throughput compared to Fast-dLLM, while maintaining comparable generation quality, establishing block-grained scheduling as a key technique for high-throughput dLLM inference.

Why it matters

Professionals deploying and scaling dLLMs can achieve significantly higher throughput and lower latency, leading to more cost-effective and responsive AI services. This is crucial for applications requiring real-time or high-volume content generation.

How to implement this in your domain

  1. 1Evaluate BlockServe's block-grained continuous batching for your dLLM serving infrastructure to improve throughput.
  2. 2Investigate integrating mixed-state execution and compute-aware admission control into your LLM serving systems.
  3. 3Benchmark current dLLM serving performance against BlockServe's reported gains to identify potential optimization areas.
  4. 4Consider adopting block-grained scheduling as a foundational technique for future high-throughput inference systems.

Who benefits

AI/ML PlatformsCloud ComputingContent CreationMedia & EntertainmentE-commerce

Key takeaways

  • BlockServe significantly improves dLLM serving throughput by addressing convergence heterogeneity in batched requests.
  • Its core innovation is block-grained scheduling, which evicts completed requests immediately.
  • The framework also includes mixed-state execution and a compute-aware admission controller.
  • BlockServe achieves substantial throughput gains (up to 10.6x) over existing methods with comparable quality.

Original post by Yuanjie Zhu, Liangwei Yang, Ke Xu, Weizhi Zhang, Shanghao Li, Zihe Song, Philip S. Yu

"arXiv:2607.08930v1 Announce Type: new Abstract: Efficient serving of diffusion large language models (dLLMs) is hindered by convergence heterogeneity: when batching multiple requests, different sequences converge at different rates, causing faster requests to stall behind slower…"

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Originally posted by Yuanjie Zhu, Liangwei Yang, Ke Xu, Weizhi Zhang, Shanghao Li, Zihe Song, Philip S. Yu on X · view source

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