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Attentio-FFN disaggregation (AFD) is an emerging architecture for LLM decoding that separates state-heavy, KV-cache-dominated Attention computation from stateless, compute-intensive FFN computation, connected by per-step communication.…

Machine Learning · Computer Science 2026-05-13 Chendong Song , Meixuan Wang , Hang Zhou , Hong Liang , Yuan Lyu , Zixi Chen , Yuwei Fan , Zijie Zhou

Disaggregation has emerged as a powerful strategy for optimizing large language model (LLM) inference by separating compute-intensive prefill and memory-bound decode phases across specialized GPUs. This separation improves utilization and…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-01-21 Yiwei Jiang , Sangeeta Chowdhary , Nathaniel Morris , Rutwik Jain , Srilatha Manne , Sam Bayliss

Speculative decoding has emerged as a promising technique for large language model (LLM) inference by accelerating autoregressive decoding via draft-then-verify. This paper studies a new edge scenario with multi-user inference, where draft…

Information Theory · Computer Science 2026-04-24 Yaodan Xu , Sheng Zhou , Zhisheng Niu

The evolution of Large Language Models from the Transformer architecture to models with trillions of parameters has shifted the primary bottleneck from model training to real time inference. Deploying these massive models is a complex…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-11-12 Madabattula Rajesh Kumar , Srinivasa Rao Aravilli , Mustafa Saify , Shashank Srivastava

Serving Large Language Models (LLMs) is a GPU-intensive task where traditional autoscalers fall short, particularly for modern Prefill-Decode (P/D) disaggregated architectures. This architectural shift, while powerful, introduces…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-08-28 Rongzhi Li , Ruogu Du , Zefang Chu , Sida Zhao , Chunlei Han , Zuocheng Shi , Yiwen Shao , Huanle Han , Long Huang , Zherui Liu , Shufan Liu

Existing large language model (LLM) serving systems typically employ Prefill-Decode disaggregated architecture to prevent computational interference between the prefill and decode phases. However, in real-world LLM serving scenarios,…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-11-07 Yu Wu , Tongxuan Liu , Yuting Zeng , Siyu Wu , Jun Xiong , Xianzhe Dong , Hailong Yang , Ke Zhang , Jing Li

Serving disaggregated large language models has been widely adopted in industrial practice for enhanced performance. However, too many tokens generated in decoding phase, i.e., occupying the resources for a long time, essentially hamper the…

Multimodal Large Language Models (MLLMs) have achieved remarkable advances by integrating text, image, and audio understanding within a unified architecture. However, existing distributed training frameworks remain fundamentally data-blind:…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-05-20 Hyeonjun An , Sihyun Kim , Chaerim Lim , Hyunjoon Kim , Rathijit Sen , Sangmin Jung , Hyeonsoo Lee , Dongwook Kim , Takki Yu , Jinkyu Jeong , Youngsok Kim , Kwanghyun Park

The growing demand for large language models (LLMs) requires serving systems to handle many concurrent requests with diverse service level objectives (SLOs). This exacerbates head-of-line (HoL) blocking during the compute-intensive prefill…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-02-19 Chia-chi Hsieh , Zan Zong , Xinyang Chen , Jianjiang Li , Jidong Zhai , Lijie Wen

The architectural shift to prefill/decode (PD) disaggregation in LLM serving improves resource utilization but struggles with the bursty nature of modern workloads. Existing autoscaling policies, often retrofitted from monolithic systems…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-12-04 Ruiqi Lai , Hongrui Liu , Chengzhi Lu , Zonghao Liu , Siyu Cao , Siyang Shao , Yixin Zhang , Luo Mai , Dmitrii Ustiugov

Transformer-based large language models (LLMs) exhibit impressive performance in generative tasks but also introduce significant challenges in real-world serving due to inefficient use of the expensive, computation-optimized accelerators.…

Machine Learning · Computer Science 2025-04-11 Shaoyuan Chen , Wencong Xiao , Yutong Lin , Mingxing Zhang , Yingdi Shan , Jinlei Jiang , Kang Chen , Yongwei Wu

The generation speed of LLMs are bottlenecked by autoregressive decoding, where tokens are predicted sequentially one by one. Alternatively, diffusion large language models (dLLMs) theoretically allow for parallel token generation, but in…

Computation and Language · Computer Science 2025-11-03 Daniel Israel , Guy Van den Broeck , Aditya Grover

With the widespread adoption of large multimodal models, efficient inference across text, image, audio, and video modalities has become critical. However, existing multimodal inference systems typically employ monolithic architectures that…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-01-21 Fan Bai , Pai Peng , Zhengzhi Tang , Zhe Wang , Gong Chen , Xiang Lu , Yinuo Li , Huan Lin , Weizhe Lin , Yaoyuan Wang , Xiaosong Li

Large Reasoning Models (LRMs) are criticized for the excessively lengthy Chain-of-Thought (CoT) to derive the final answer, suffering from high first-token and overall latency. Typically, the CoT of LRMs mixes multiple thinking units; each…

Artificial Intelligence · Computer Science 2025-06-06 Zihao Zeng , Xuyao Huang , Boxiu Li , Hao Zhang , Zhijie Deng

In spite of the great potential of large language models (LLMs) across various tasks, their deployment on resource-constrained devices remains challenging due to their excessive computational and memory demands. Quantization has emerged as…

Machine Learning · Computer Science 2025-02-28 Hao Mark Chen , Fuwen Tan , Alexandros Kouris , Royson Lee , Hongxiang Fan , Stylianos I. Venieris

Large-scale AI models, such as Large Language Models (LLMs) and Diffusion Models (DMs), have grown rapidly in size, creating significant challenges for efficient deployment on resource-constrained hardware. In this paper, we introduce…

Machine Learning · Computer Science 2026-01-05 Tianyi Zhang , Mohsen Hariri , Shaochen Zhong , Vipin Chaudhary , Yang Sui , Xia Hu , Anshumali Shrivastava

Parameter-efficient finetuning (PEFT) methods effectively adapt large language models (LLMs) to diverse downstream tasks, reducing storage and GPU memory demands. Despite these advantages, several applications pose new challenges to PEFT…

Machine Learning · Computer Science 2024-11-05 Baohao Liao , Christof Monz

The growing adoption of Large Language Models (LLMs) across various domains has driven the demand for efficient and scalable AI-serving solutions. Deploying LLMs requires optimizations to manage their significant computational and data…

Hardware Architecture · Computer Science 2025-03-07 Junsoo Kim , Hunjong Lee , Geonwoo Ko , Gyubin Choi , Seri Ham , Seongmin Hong , Joo-Young Kim

In large language model (LLM) serving systems, executing each request consists of two phases: the compute-intensive prefill phase and the memory-intensive decoding phase. To prevent performance interference between the two phases, current…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-27 Yunkai Liang , Zhangyu Chen , Pengfei Zuo , Zhi Zhou , Xu Chen , Zhou Yu

Large language models (LLMs) exhibit exceptional performance across a wide range of tasks; however, their token-by-token autoregressive generation process significantly hinders inference speed. Speculative decoding presents a promising…

Computation and Language · Computer Science 2025-03-04 Kai Lv , Honglin Guo , Qipeng Guo , Xipeng Qiu