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Large language model (LLM) inference serving systems are essential to various LLM-based applications. As demand for LLM services continues to grow, scaling these systems to handle high request rates while meeting latency Service-Level…

Machine Learning · Computer Science 2025-04-11 Shihong Gao , Xin Zhang , Yanyan Shen , Lei Chen

Large Language Models (LLMs) have gained popularity in recent years, driving up the demand for inference. LLM inference is composed of two phases with distinct characteristics: a compute-bound prefill phase followed by a memory-bound decode…

Hardware Architecture · Computer Science 2025-10-10 Hengrui Zhang , Pratyush Patel , August Ning , David Wentzlaff

Cost of serving large language models (LLM) is high, but the expensive and scarce GPUs are poorly efficient when generating tokens sequentially, unless the batch of sequences is enlarged. However, the batch size is limited by some…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-03-19 Jiaao He , Jidong Zhai

Large language models (LLMs) are increasingly deployed in AI infrastructure, driving the need for high throughput, resource efficient serving systems. Disaggregated LLM serving, which separates prompt prefill from auto-regressive decode,…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-03-11 Yiyuan He , Minxian Xu , Jingfeng Wu , Jianmin Hu , Chong Ma , Min Shen , Le Chen , Chengzhong Xu , Lin Qu , Kejiang Ye

Existing LLM serving strategies can be categorized based on whether prefill and decode phases are disaggregated: non-disaggregated (NoDG) or fully disaggregated (FuDG). However, the NoDG strategy leads to strong prefill-decode interference…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-04-28 Jiangsu Du , Hongbin Zhang , Taosheng Wei , Zhenyi Zheng , Kaiyi Wu , Zhiguang Chen , Yutong Lu

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 language models (LLMs) have become increasingly popular in various areas, traditional business gradually shifting from rule-based systems to LLM-based solutions. However, the inference of LLMs is resource-intensive or…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-01-06 Wanyi Zheng , Minxian Xu , Shengye Song , Kejiang Ye

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

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

Large Language Models (LLMs) are rapidly becoming critical infrastructure for enterprise applications, driving unprecedented demand for GPU-based inference services. A key operational challenge arises from the two-phase nature of LLM…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-02-04 Ruihan Lin , Zezhen Ding , Zean Han , Jiheng Zhang

Serving disaggregated large language models (LLMs) over tens of thousands of xPU devices (GPUs or NPUs) with reliable performance faces multiple challenges. 1) Ignoring the diversity (various prefixes and tidal requests), treating all the…

Large language model (LLM) services are mostly centralized, leading to scalability bottlenecks and underutilization of substantial scattered GPU resources. While decentralization offers a promising alternative, existing frameworks primarily…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-03-25 Huanyu Wang , Ziyu Xia , Zhuoming Chen , Beidi Chen

Recent breakthroughs in Large-scale language models (LLMs) have demonstrated impressive performance on various tasks. The immense sizes of LLMs have led to very high resource demand and cost for running the models. Though the models are…

Machine Learning · Computer Science 2024-03-05 Juntao Zhao , Borui Wan , Yanghua Peng , Haibin Lin , Chuan Wu

As machine learning techniques are applied to a widening range of applications, high throughput machine learning (ML) inference servers have become critical for online service applications. Such ML inference servers pose two challenges:…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-09-06 Seungbeom Choi , Sunho Lee , Yeonjae Kim , Jongse Park , Youngjin Kwon , Jaehyuk Huh

LAPS identifies and disaggregates requests with different prompt lengths in LLM serving to reduce TTFT latency. While recent systems have decoupled the prefill and decode stages to improve throughput, they still rely on unified scheduling…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-01-29 Jianshu She , Zonghang Li , Hongchao Du , Shangyu Wu , Wenhao Zheng , Eric Xing , Zhengzhong Liu , Huaxiu Yao , Jason Xue , Qirong Ho

Modern deployment of large language models (LLMs) frequently involves both inference serving and continuous retraining to stay aligned with evolving data and user feedback. Common practices separate these workloads onto distinct servers in…

Artificial Intelligence · Computer Science 2025-07-30 Yufei Li , Zexin Li , Yinglun Zhu , Cong Liu

Tensor parallelism (TP) enables large language models (LLMs) to scale inference efficiently across multiple GPUs, but its tight coupling makes systems fragile: a single GPU failure can halt execution, trigger costly KVCache recomputation,…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-11-19 Ziyi Xu , Zhiqiang Xie , Swapnil Gandhi , Christos Kozyrakis

Context retrieval systems for LLM inference face a critical challenge: high retrieval latency creates a fundamental tension between waiting for complete context (poor time-to-first-token) and proceeding without it (reduced quality).…

Databases · Computer Science 2026-05-19 Rajveer Bachkaniwala , Chengqi Luo , Richard So , Divya Mahajan , Kexin Rong

Realistic evaluation of LLM serving systems requires online workloads, dynamic arrivals, queueing, and the serving engine's local scheduling for execution batching, but running such experiments on GPUs is expensive. Existing simulators…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-05-04 Wei Da , Evangelia Kalyvianaki

Large language models (LLMs) power many modern applications, but serving them at scale remains costly and resource-intensive. Current server-centric systems overlook consumer-grade GPUs at the edge. We introduce SpecEdge, an edge-assisted…

Computation and Language · Computer Science 2025-11-19 Jinwoo Park , Seunggeun Cho , Dongsu Han