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Large Multimodal Models (LMMs) extend Large Language Models (LLMs) by handling diverse inputs such as images, audio, and video, but at the cost of adding a multimodal encoding stage that increases both computational and memory overhead.…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-07-01 Gursimran Singh , Xinglu Wang , Yifan Hu , Timothy Yu , Linzi Xing , Wei Jiang , Zhefeng Wang , Xiaolong Bai , Yi Li , Ying Xiong , Yong Zhang , Zhenan Fan

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

Each request in LLM inference goes through two phases: compute-bound prefill and memory-bandwidth-bound decode. To improve GPU utilization, recent systems use hybrid batching that combines the prefill and decode phases of different requests…

Machine Learning · Computer Science 2025-02-18 Aditya K Kamath , Ramya Prabhu , Jayashree Mohan , Simon Peter , Ramachandran Ramjee , Ashish Panwar

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

Multimodal large language models (MLLMs) extend LLMs with visual understanding through a three-stage pipeline: multimodal preprocessing, vision encoding, and LLM inference. While these stages enhance capability, they introduce significant…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-12-22 Lingxiao Zhao , Haoran Zhou , Yuezhi Che , Dazhao Cheng

Disaggregating the prefill and decoding phases represents an effective new paradigm for generative inference of large language models (LLM), which eliminates prefill-decoding interference and optimizes resource allocation. However, it is…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-02-13 Youhe Jiang , Ran Yan , Binhang Yuan

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

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

Modern large language model (LLM) inference has progressively disaggregated to keep pace with growing model sizes and tight TTFT and TPOT service-level objectives: from chunked-prefill aggregation, to prefill-decode (P/D) disaggregation,…

With the rapid evolution of Large Language Models (LLMs), multi-round workflows, such as autonomous agents and iterative retrieval, have become increasingly prevalent. However, this raises hurdles for serving LLMs under prefill-decode (PD)…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-02-17 Wenhao He , Youhe Jiang , Penghao Zhao , Quanqing Xu , Eiko Yoneki , Bin Cui , Fangcheng Fu

Aggressively quantized large language models (LLMs), such as BitNet-style 1.58-bit Transformers with ternary weights, make it feasible to deploy generative AI on low-power edge FPGAs. However, as prompts grow to tens of thousands of tokens,…

Hardware Architecture · Computer Science 2025-12-15 Yifan Zhang , Zhiheng Chen , Ye Qiao , Sitao Huang

In multi-model LLM serving, decode execution remains inefficient due to model-specific resource partitioning: since cross-model batching is not possible, memory-bound decoding often suffers from severe GPU underutilization, especially under…

Artificial Intelligence · Computer Science 2026-03-04 Sunghyeon Woo , Ahreum Seo , Jaegwang Lee , Jaeeun Kil , Hanbae Seo , Joonghoon Kim , Baeseong Park , Se Jung Kwon , Dongsoo Lee

Multi-agent systems increasingly orchestrate multiple specialized language models to solve complex real-world problems, often invoking them over a shared context. This execution pattern repeatedly processes the same prompt prefix across…

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

Efficient LLM inference on resource-constrained devices presents significant challenges in compute and memory utilization. Due to limited GPU memory, existing systems offload model weights to CPU memory, incurring substantial I/O overhead…

Machine Learning · Computer Science 2025-05-22 Xiangwen Zhuge , Xu Shen , Zeyu Wang , Fan Dang , Xuan Ding , Danyang Li , Yahui Han , Tianxiang Hao , Zheng Yang

The rapid adoption of AI and convenience offered by cloud services have resulted in the growing demands for GPUs in the cloud. Generally, GPUs are physically attached to host servers as PCIe devices. However, the fixed assembly combination…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-10-10 Bowen He , Xiao Zheng , Yuan Chen , Weinan Li , Yajin Zhou , Xin Long , Pengcheng Zhang , Xiaowei Lu , Linquan Jiang , Qiang Liu , Dennis Cai , Xiantao Zhang

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 Language Models (LLMs) are increasingly deployed in both latency-sensitive online services and cost-sensitive offline workloads. Co-locating these workloads on shared serving instances can improve resource utilization, but directly…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-12-01 Siyu Wu , Zihan Tang , Yuting Zeng , Hui Chen , Guiguang Ding , Tongxuan Liu , Ke Zhang , Hailong Yang

Transformer-based large language model (LLM) inference serving is now the backbone of many cloud services. LLM inference consists of a prefill phase and a decode phase. However, existing LLM deployment practices often overlook the distinct…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-01-23 Cunchen Hu , Heyang Huang , Liangliang Xu , Xusheng Chen , Jiang Xu , Shuang Chen , Hao Feng , Chenxi Wang , Sa Wang , Yungang Bao , Ninghui Sun , Yizhou Shan

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…