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Retrieval-Augmented Language Modeling (RALM) by integrating large language models (LLM) with relevant documents from an external corpus is a proven method for enabling the LLM to generate information beyond the scope of its pre-training…

计算与语言 · 计算机科学 2025-06-16 Runheng Liu , Xingchen Xiao , Heyan Huang , Zewen Chi , Zhijing Wu

Retrieval-augmented generation (RAG) and long-context language models (LCLMs) both address context limitations of LLMs in open-domain question answering (QA). However, optimal external context to retrieve remains an open problem: fixing the…

计算与语言 · 计算机科学 2025-10-01 Chihiro Taguchi , Seiji Maekawa , Nikita Bhutani

Retrieval-Augmented Generation (RAG) enables Large Language Models (LLMs) to extend their existing knowledge by dynamically incorporating external information. However, practical deployment is fundamentally constrained by the LLM's finite…

信息检索 · 计算机科学 2026-03-24 Jiarui Guo , Yuemeng Xu , Zongwei Lv , Yangyujia Wang , Xiaolin Wang , Kan Liu , Tao Lan , Lin Qu , Tong Yang

Large language model (LLM) applications often reuse previously processed context, such as chat history and documents, which introduces significant redundant computation. Existing LLM serving systems address such redundant computation by…

Large language models (LLMs) excel at processing long sequences, boosting demand for key-value (KV) caching. While recent efforts to evict KV cache have alleviated the inference burden, they often fail to allocate resources rationally…

计算与语言 · 计算机科学 2025-12-25 Ziran Qin , Yuchen Cao , Mingbao Lin , Wen Hu , Shixuan Fan , Ke Cheng , Weiyao Lin , Jianguo Li

Transformers have a quadratic scaling of computational complexity with input size, which limits the input context window size of large language models (LLMs) in both training and inference. Meanwhile, retrieval-augmented generation (RAG)…

计算与语言 · 计算机科学 2024-10-18 Yimin Tang , Yurong Xu , Ning Yan , Masood Mortazavi

Retrieval augmented generation (RAG) has been widely adopted to help Large Language Models (LLMs) to process tasks involving long documents. However, existing retrieval models are not designed for long document retrieval and fail to address…

信息检索 · 计算机科学 2026-02-13 David Jiahao Fu , Lam Thanh Do , Jiayu Li , Kevin Chen-Chuan Chang

To extend the context length of Transformer-based large language models (LLMs) and improve comprehension capabilities, we often face limitations due to computational resources and bounded memory storage capacity. This work introduces a…

计算与语言 · 计算机科学 2024-06-11 Chensen Huang , Guibo Zhu , Xuepeng Wang , Yifei Luo , Guojing Ge , Haoran Chen , Dong Yi , Jinqiao Wang

Retrieval-Augmented Generation (RAG) systems suffer from severe time-to-first-token (TTFT) bottlenecks due to long input sequences. Existing KV cache reuse methods face a fundamental trade-off: prefix caching requires identical prefixes…

机器学习 · 计算机科学 2026-05-22 Bin Yang , Qiuyu Leng , Jun Zeng , Zhenhua Wu

Current LLM agents typically lack instance-level context, which comprises concrete facts such as environment structure, system configurations, and local mechanics. Consequently, existing methods are forced to intertwine exploration with…

计算与语言 · 计算机科学 2026-01-14 Kuntai Cai , Juncheng Liu , Xianglin Yang , Zhaojie Niu , Xiaokui Xiao , Xing Chen

Ensuring truthfulness in large language models (LLMs) remains a critical challenge for reliable text generation. While supervised fine-tuning and reinforcement learning with human feedback have shown promise, they require a substantial…

机器学习 · 计算机科学 2026-03-17 Manh Nguyen , Sunil Gupta , Hung Le

Autonomous LLM agents increasingly operate in long-horizon, interactive settings where success depends on reusing experience accumulated over extended histories. However, existing agent memory systems are fundamentally constrained by…

计算与语言 · 计算机科学 2026-04-30 Jinze Li , Yang Zhang , Xin Yang , Jiayi Qu , Jinfeng Xu , Shuo Yang , Junhua Ding , Edith Cheuk-Han Ngai

Large Language Models (LLMs) have demonstrated remarkable capabilities in handling long texts and have almost perfect performance in traditional retrieval tasks. However, their performance significantly degrades when it comes to numerical…

计算与语言 · 计算机科学 2024-12-05 Yijiong Yu

Large language model (LLM) based agentic workflows have become a popular paradigm for coordinating multiple specialized agents to solve complex tasks. To improve serving efficiency, existing LLM systems employ prefix caching to reuse…

分布式、并行与集群计算 · 计算机科学 2025-07-11 Zaifeng Pan , Ajjkumar Patel , Zhengding Hu , Yipeng Shen , Yue Guan , Wan-Lu Li , Lianhui Qin , Yida Wang , Yufei Ding

Retrieval-augmented generation (RAG) enhances large language models by incorporating context retrieved from external knowledge sources. While the effectiveness of the retrieval module is typically evaluated with relevance-based ranking…

信息检索 · 计算机科学 2026-01-13 Jia-Huei Ju , Suzan Verberne , Maarten de Rijke , Andrew Yates

Multi-agent LLM systems routinely generate multiple candidate responses that are aggregated by an LLM judge. To reduce the dominant prefill cost in such pipelines, recent work advocates KV cache reuse across partially shared contexts and…

多智能体系统 · 计算机科学 2026-01-14 Sichu Liang , Zhenglin Wang , Jiajia Chu , Pengfei Xia , Hui Zang , Deyu Zhou

Long-context LLMs have enabled numerous downstream applications but also introduced significant challenges related to computational and memory efficiency. To address these challenges, optimizations for long-context inference have been…

Retrieval-Augmented Generation (RAG) has become an essential approach for extending the reasoning and knowledge capacity of large language models (LLMs). While prior research has primarily focused on retrieval quality and prompting…

计算与语言 · 计算机科学 2025-12-09 Jiamin Chen , Yuchen Li , Xinyu Ma , Xinran Chen , Xiaokun Zhang , Shuaiqiang Wang , Chen Ma , Dawei Yin

Large language models (LLMs) support long-context inference but suffer from substantial memory and runtime overhead due to Key-Value (KV) Cache growth. Existing KV Cache eviction methods primarily rely on local attention weights, neglecting…

计算与语言 · 计算机科学 2026-05-11 Tho Mai , Joo-Young Kim

Large Reasoning Models (LRMs) have shown promising accuracy improvements on complex problem-solving tasks. While these models have attained high accuracy by leveraging additional computation at test time, they need to generate long…