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Retrieval-Augmented Generation (RAG) improves model output accuracy by leveraging external knowledge bases, serving as an effective solution to address hallucination issues and knowledge-update delays in Large Language Models (LLMs).…

Machine Learning · Computer Science 2025-10-27 Danying Ge , Jianhua Gao , Yixue Yang , Weixing Ji

Multi-tiered large memory systems call for rethinking of memory profiling and migration because of the unique problems unseen in the traditional memory systems with smaller capacity and fewer tiers. We develop MTM, an…

Performance · Computer Science 2023-05-03 Jie Ren , Dong Xu , Ivy Peng , Junhee Ryu , Kwangsik Shin , Daewoo Kim , Dong Li

Object-level management of tiered memory has been studied to address the inefficiencies in page-based systems. However, object-level management for CXL-tiered memory remains underexplored due to CXL's tight performance budget and load/store…

Operating Systems · Computer Science 2026-05-21 Sam Son , Zhihong Luo , Wen Zhang , Sylvia Ratnasamy , Scott Shenker

The significant resource demands in LLM serving prompts production clusters to fully utilize heterogeneous hardware by partitioning LLM models across a mix of high-end and low-end GPUs. However, existing parallelization approaches often…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-09-11 Zizhao Mo , Jianxiong Liao , Huanle Xu , Zhi Zhou , Chengzhong Xu

Edge computing enables smart IoT-based systems via concurrent and continuous execution of latency-sensitive machine learning (ML) applications. These edge-based machine learning systems are often battery-powered (i.e., energy-limited). They…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-07-22 Ali Mokhtari , Md Abir Hossen , Pooyan Jamshidi , Mohsen Amini Salehi

Memory tiering has received wide adoption in recent years as an effective solution to address the increasing memory demands of memory-intensive workloads. However, existing tiered memory systems often fail to meet service-level objectives…

Operating Systems · Computer Science 2024-12-13 Jiaheng Lu , Yiwen Zhang , Hasan Al Maruf , Minseo Park , Yunxuan Tang , Fan Lai , Mosharaf Chowdhury

As modern LLMs support thousands to millions of tokens, KV caches grow to hundreds of gigabytes, stressing memory capacity and bandwidth. Existing solutions, such as KV cache pruning and offloading, alleviate these but underutilize hardware…

Performance · Computer Science 2026-04-21 Mao Lin , Xi Wang , Guilherme Cox , Dong Li , Hyeran Jeon

The memory demand of virtual machines (VMs) is increasing, while DRAM has limited capacity and high power consumption. Non-volatile memory (NVM) is an alternative to DRAM, but it has high latency and low bandwidth. We observe that the VM…

Operating Systems · Computer Science 2022-09-28 Sai sha , Chuandong Li , Yingwei Luo , Xiaolin Wang , Zhenlin Wang

Heterogeneous Memory Architecture (HMA) aims to optimize memory usage by leveraging a combination of memory types, such as high-bandwidth memory (HBM), commodity DRAM, and non-volatile memory (NVM), when utilized as main memory. To achieve…

Hardware Architecture · Computer Science 2026-04-23 Upasna , Venkata Kalyan Tavva

In this dissertation, we propose a memory and computing coordinated methodology to thoroughly exploit the characteristics and capabilities of the GPU-based heterogeneous system to effectively optimize applications' performance and privacy.…

Cryptography and Security · Computer Science 2022-09-07 Zhendong Wang , Yang Hu

This paper summarizes the idea of Tiered-Latency DRAM, which was published in HPCA 2013. The key goal of TL-DRAM is to provide low DRAM latency at low cost, a critical problem in modern memory systems. To this end, TL-DRAM introduces…

Hardware Architecture · Computer Science 2016-01-27 Donghyuk Lee , Yoongu Kim , Vivek Seshadri , Jamie Liu , Lavanya Subramanian , Onur Mutlu

Tiered memory architectures have gained significant traction in the database community in recent years. In these architectures, the on-chip DRAM of the host processor is typically referred to as local memory, and forms the primary tier.…

Databases · Computer Science 2026-03-04 Yeasir Rayhan , Walid G. Aref

We present a systematic study of Tensor Network (TN) models $\unicode{x2013}$ Matrix Product States (MPS) and Tree Tensor Networks (TTN) $\unicode{x2013}$ for real-time jet tagging in high-energy physics, with a focus on low-latency…

Retrieval-augmented generation (RAG), which combines large language models (LLMs) with retrievals from external knowledge databases, is emerging as a popular approach for reliable LLM serving. However, efficient RAG serving remains an open…

Information Retrieval · Computer Science 2025-03-24 Wenqi Jiang , Suvinay Subramanian , Cat Graves , Gustavo Alonso , Amir Yazdanbakhsh , Vidushi Dadu

Large Language Model (LLM) deployment is increasingly shifting to cost-efficient accelerators like Google's Tensor Processing Units (TPUs), prioritizing both performance and total cost of ownership (TCO). However, existing LLM inference…

Performance · Computer Science 2026-04-20 Jevin Jiang , Ying Chen , Blake A. Hechtman , Fenghui Zhang , Yarong Mu

Deploying proprietary Deep Neural Networks (DNNs) on commodity edge devices demands hardware-backed Digital Rights Management (DRM) capable of withstanding both software-level and physical adversaries. In Unified Memory Architecture (UMA)…

Cryptography and Security · Computer Science 2026-04-28 Animan Naskar

Even with generational improvements in DRAM technology, memory access latency still remains the major bottleneck for application accelerators, primarily due to limitations in memory interface IPs which cannot fully account for variations in…

Hardware Architecture · Computer Science 2021-08-24 Sasindu Wijeratne , Sanket Pattnaik , Zhiyu Chen , Rajgopal Kannan , Viktor Prasanna

The scaling of Large Language Models (LLMs) for retrieval-based tasks, particularly in Retrieval Augmented Generation (RAG), faces significant memory constraints, especially when fine-tuning extensive prompt sequences. Current open-source…

Machine Learning · Computer Science 2024-03-20 Anique Tahir , Lu Cheng , Huan Liu

Scientific workflow management systems like Nextflow support large-scale data analysis by abstracting away the details of scientific workflows. In these systems, workflows consist of several abstract tasks, of which instances are run in…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-01-20 Jonathan Bader , Lauritz Thamsen , Svetlana Kulagina , Jonathan Will , Henning Meyerhenke , Odej Kao

Deploying million-token Large Language Models (LLMs) is challenging because production workloads are highly heterogeneous, mixing short queries and long documents. This heterogeneity, combined with the quadratic complexity of attention,…