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A large language model (LLM) is one of the most important emerging machine learning applications nowadays. However, due to its huge model size and runtime increase of the memory footprint, LLM inferences suffer from the lack of memory…

Hardware Architecture · Computer Science 2025-04-22 Soojin Hwang , Jungwoo Kim , Sanghyeon Lee , Hongbeen Kim , Jaehyuk Huh

Scaling long-context ability is essential for Large Language Models (LLMs). To amortize the memory consumption across multiple devices in long-context training, inter-data partitioning (a.k.a. Data Parallelism) and intra-data partitioning…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-09-01 Hao Ge , Junda Feng , Qi Huang , Fangcheng Fu , Xiaonan Nie , Lei Zuo , Haibin Lin , Bin Cui , Xin Liu

Large Language Models (LLMs) exhibit pronounced memory-bound characteristics during inference due to High Bandwidth Memory (HBM) bandwidth constraints. In this paper, we propose an L2 Cache-oriented asynchronous KV Cache prefetching method…

Machine Learning · Computer Science 2025-11-11 Yanhao Dong , Yubo Miao , Weinan Li , Xiao Zheng , Chao Wang , Jiesheng Wu , Feng Lyu

Sequence alignment is a memory bound computation whose performance in modern systems is limited by the memory bandwidth bottleneck. Processing-in-memory architectures alleviate this bottleneck by providing the memory with computing…

Hardware Architecture · Computer Science 2023-03-28 Safaa Diab , Amir Nassereldine , Mohammed Alser , Juan Gómez-Luna , Onur Mutlu , Izzat El Hajj

As large language models (LLMs) have shown great success in many tasks, they are used in various applications. While a lot of works have focused on the efficiency of single-LLM application (e.g., offloading, request scheduling, parallelism…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-24 Jingzhi Fang , Yanyan Shen , Yue Wang , Lei Chen

Long-horizon language agents accumulate conversation history far faster than any fixed context window can hold, making memory management critical to both answer accuracy and serving cost. Existing approaches either expand the context window…

Computation and Language · Computer Science 2026-05-25 Jingyi Peng , Zhongwei Wan , Weiting Liu , Qiuzhuang Sun

The computational challenges of Large Language Model (LLM) inference remain a significant barrier to their widespread deployment, especially as prompt lengths continue to increase. Due to the quadratic complexity of the attention…

The past few years has witnessed specialized large language model (LLM) inference systems, such as vLLM, SGLang, Mooncake, and DeepFlow, alongside rapid LLM adoption via services like ChatGPT. Driving these system design efforts is the…

Databases · Computer Science 2025-06-30 James Pan , Guoliang Li

Transformer-based large language models (LLMs) have achieved remarkable success, yet their standard attention mechanism incurs quadratic computation and memory costs with respect to sequence length, posing a major bottleneck for…

Machine Learning · Computer Science 2025-10-22 Tao Bu , Qiangang Wang , Bowen Zeng , Hanwen Sun , Yunpeng Huang , Chun Cao , Jingwei Xu

Processing-in-memory (PIM) promises to alleviate the data movement bottleneck in modern computing systems. However, current real-world PIM systems have the inherent disadvantage that their hardware is more constrained than in conventional…

Mathematical Software · Computer Science 2023-09-07 Maurus Item , Juan Gómez-Luna , Yuxin Guo , Geraldo F. Oliveira , Mohammad Sadrosadati , Onur Mutlu

Existing large language models (LLMs) can only afford fix-sized inputs due to the input length limit, preventing them from utilizing rich long-context information from past inputs. To address this, we propose a framework, Language Models…

Computation and Language · Computer Science 2023-06-13 Weizhi Wang , Li Dong , Hao Cheng , Xiaodong Liu , Xifeng Yan , Jianfeng Gao , Furu Wei

Training machine learning algorithms is a computationally intensive process, which is frequently memory-bound due to repeatedly accessing large training datasets. As a result, processor-centric systems (e.g., CPU, GPU) suffer from costly…

Hardware Architecture · Computer Science 2022-08-04 Juan Gómez-Luna , Yuxin Guo , Sylvan Brocard , Julien Legriel , Remy Cimadomo , Geraldo F. Oliveira , Gagandeep Singh , Onur Mutlu

Mixed-precision inference techniques reduce the memory and computational demands of Large Language Models (LLMs) by applying hybrid precision formats to model weights, activations, and KV caches. However, existing systems struggle to (i)…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-05-18 Li Zhang , Youhe Jiang , Guoliang He , Xin Chen , Han Lv , Qian Yao , Ningsheng Ma , Fangcheng Fu , Kai Chen

Processing-in-memory (PIM) architectures allow software to explicitly initiate computation in the memory. This effectively makes PIM operations a new class of memory operations, alongside standard memory operations (e.g., load, store). For…

Hardware Architecture · Computer Science 2022-12-08 Ben Perach , Ronny Ronnen , Shahar Kvatinsky

High-performance Host processors can integrate Processing-In-Memory (PIM) devices, which can accelerate memory-intensive kernels of Machine Learning (ML) models, including Large Language Models (LLMs), by leveraging the large memory…

As inference workloads for large language models (LLMs) scale to meet growing user demand, pipeline parallelism (PP) has become a widely adopted strategy for multi-GPU deployment, particularly in cross-node setups, to improve key-value (KV)…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-06-30 Yongchao He , Bohan Zhao , Zheng Cao

Inference serving for large language models (LLMs) is the key to unleashing their potential in people's daily lives. However, efficient LLM serving remains challenging today because the requests are inherently heterogeneous and…

Hardware Architecture · Computer Science 2024-06-07 Biao Sun , Ziming Huang , Hanyu Zhao , Wencong Xiao , Xinyi Zhang , Yong Li , Wei Lin

Long context understanding remains challenging for large language models due to their limited context windows. This paper introduces Long Input Fine-Tuning (LIFT), a novel framework for long-context modeling that can enhance the…

Computation and Language · Computer Science 2026-04-14 Yansheng Mao , Yufei Xu , Jiaqi Li , Fanxu Meng , Haotong Yang , Zilong Zheng , Xiyuan Wang , Muhan Zhang

Processing-in-memory (PIM) has emerged as an enabler for the energy-efficient and high-performance acceleration of deep learning (DL) workloads. Resistive random-access memory (ReRAM) is one of the most promising technologies to implement…

Hardware Architecture · Computer Science 2024-03-29 Harsh Sharma , Gaurav Narang , Janardhan Rao Doppa , Umit Ogras , Partha Pratim Pande

Most existing Large Language Model (LLM)-based agent frameworks rely on centralized orchestration, incurring high deployment costs, rigid communication topologies, and limited adaptability. To address these challenges, we introduce…

Machine Learning · Computer Science 2025-08-28 Ji Wang , Kashing Chen , Xinyuan Song , Ke Zhang , Lynn Ai , Eric Yang , Bill Shi