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Large language model (LLM) serving is fundamentally limited by inefficient hardware utilization. Autoregressive (AR) decoding underutilizes GPUs due to its strictly sequential execution, while diffusion LLMs (DLLMs) improve throughput by…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-05-26 Chiyue Wei , Cong Guo , Bowen Duan , Junyao Zhang , Haoxuan Shan , Yifei Wang , Yangjie Zhou , Hai "Helen" Li , Danyang Zhuo , Yiran Chen

In this paper, we consider a mixed-prompt scenario for a large language model (LLM) inference serving system that supports diverse applications with both short prompts and long prompts and heterogeneous SLOs for iteration time. To improve…

Computation and Language · Computer Science 2025-03-19 Haiying Shen , Tanmoy Sen

Speculative decoding accelerates large language model (LLM) inference by allowing a small draft model to predict multiple future tokens for verification by a larger target model. In AI-native radio access networks (AI-RAN), this enables…

Signal Processing · Electrical Eng. & Systems 2026-01-13 Ce Zheng , Ke Zhang , Chen Sun , Wenqi Zhang , Qiong Liu , Angesom Ataklity Tesfay

The performance of large language models (LLMs) is closely linked to their underlying size, leading to ever-growing networks and hence slower inference. Speculative decoding has been proposed as a technique to accelerate autoregressive…

Large language models (LLMs) propel the prosperity of interactive AI applications showcased by ChatGPT that demand timely response of inference services. However, LLM inference is computation intensive and memory intensive, and improper…

Networking and Internet Architecture · Computer Science 2025-12-29 Yuqing Yang , Yuedong Xu , Lei Jiao

Large language model (LLM) serving is becoming an increasingly critical workload for cloud providers. Existing LLM serving systems focus on interactive requests, such as chatbots and coding assistants, with tight latency SLO requirements.…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-02-26 Archit Patke , Dhemath Reddy , Saurabh Jha , Haoran Qiu , Christian Pinto , Chandra Narayanaswami , Zbigniew Kalbarczyk , Ravishankar Iyer

LLM-based search agents achieve strong performance but suffer from severe latency, as each step requires serialized LLM reasoning followed by action of tool execution. We revisit this bottleneck through the lens of speculation. While…

Artificial Intelligence · Computer Science 2025-11-26 Zixiao Huang , Wen Zeng , Tianyu Fu , Tengxuan Liu , Yizhou Sun , Ke Hong , Xinhao Yang , Chengchun Liu , Yan Li , Quanlu Zhang , Guohao Dai , Zhenhua Zhu , Yu Wang

This technical report describes the design and training of novel speculative decoding draft models, for accelerating the inference speeds of large language models in a production environment. By conditioning draft predictions on both…

Computation and Language · Computer Science 2024-06-10 Davis Wertheimer , Joshua Rosenkranz , Thomas Parnell , Sahil Suneja , Pavithra Ranganathan , Raghu Ganti , Mudhakar Srivatsa

Video Large Language Models (Video-LLMs) excel in video understanding but suffer from high inference latency during autoregressive generation. Speculative Decoding (SD) mitigates this by applying a draft-and-verify paradigm, yet existing…

Computation and Language · Computer Science 2026-04-10 Yicheng Ji , Jun Zhang , Jinpeng Chen , Cong Wang , Lidan Shou , Gang Chen , Huan Li

Large Language Models (LLMs) have been widely adopted in ranking systems such as information retrieval (IR) systems and recommender systems (RSs). To alleviate the latency of auto-regressive decoding, some studies explore the single (first)…

Artificial Intelligence · Computer Science 2025-05-28 Yingpeng Du , Tianjun Wei , Zhu Sun , Jie Zhang

Ensembles of generative large language models (LLMs) are a promising way to compensate for individual model limitations, integrating the strengths of different LLMs. Existing LLM ensemble methods, however, face limitations such as…

Computation and Language · Computer Science 2026-03-09 Bo Lv , Nayu Liu , Chen Tang , Xin Liu , Yue Yu , Ping Luo

Efficient parallelization of Large Language Models (LLMs) with long sequences is essential but challenging due to their significant computational and memory demands, particularly stemming from communication bottlenecks in attention…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-12-31 Zongwu Wang , Fangxin Liu , Mingshuai Li , Li Jiang

Production LLM serving must simultaneously deliver high throughput, low latency, and sufficient context capacity under non-stationary traffic and mixed request requirements. Data parallelism (DP) maximizes throughput by running independent…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-03-03 Shouwei Gao , Junqi Yin , Feiyi Wang , Wenqian Dong

LLM inference must meet strict latency SLOs (e.g., 100 ms P99 time-between-tokens) while maximizing goodput. Yet, real-world variability in prompt and response lengths skews compute-intensive prefill and memory-bound decode phases, making…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-05-23 Chaoyi Ruan , Yinhe Chen , Dongqi Tian , Yandong Shi , Yongji Wu , Jialin Li , Cheng Li

Large language models (LLMs) are increasingly needed for interactive mobile applications, but high-quality models exceed the limited DRAM available on smartphones. Flash storage can hold larger models, yet flash-backed inference is slow…

Machine Learning · Computer Science 2026-05-19 Tuowei Wang , Fengzu Li , Yanfan Sun , Wei Gao , Ju Ren

Adaptive traffic signal control (TSC) has demonstrated strong effectiveness in managing dynamic traffic flows. However, conventional methods often struggle when unforeseen traffic incidents occur (e.g., accidents and road maintenance),…

Systems and Control · Electrical Eng. & Systems 2026-01-23 Shiqi Wei , Qiqing Wang , Kaidi Yang

Large multimodal models (LMMs) typically employ an encoding module to transform multimodal data inputs into embeddings, which are then fed to language models for further processing. However, efficiently serving LMMs remains highly…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-09-30 Tianyu Guo , Tianming Xu , Xianjie Chen , Junru Chen , Nong Xiao , Xianwei Zhang

Reasoning language models have demonstrated remarkable capabilities on challenging tasks by generating elaborate chain-of-thought (CoT) solutions. However, such lengthy generation shifts the inference bottleneck from compute-bound to…

Speculative decoding is a powerful way to accelerate autoregressive large language models (LLMs), but directly porting it to vision-language models (VLMs) faces unique systems constraints: the prefill stage is dominated by visual tokens…

Computer Vision and Pattern Recognition · Computer Science 2025-09-23 Haiduo Huang , Fuwei Yang , Zhenhua Liu , Xuanwu Yin , Dong Li , Pengju Ren , Emad Barsoum

Multimodal large language models (MLLMs) extend LLMs to handle images, videos, and audio by incorporating feature extractors and projection modules. However, these additional components -- combined with complex inference pipelines and…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-11-12 Zedong Liu , Shenggan Cheng , Guangming Tan , Yang You , Dingwen Tao