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As transformer sequence lengths grow, existing pipeline parallelisms incur suboptimal performance due to the quadratic attention computation and the substantial memory overhead. To relieve these challenges, we propose HelixPipe, a novel…

Machine Learning · Computer Science 2025-07-02 Geng Zhang , Shenggan Cheng , Xuanlei Zhao , Ziming Liu , Yang You

Mixture of Experts (MoE) models with conditional execution of sparsely activated layers have enabled training models with a much larger number of parameters. As a result, these models have achieved significantly better quality on various…

Computation and Language · Computer Science 2022-11-21 Young Jin Kim , Rawn Henry , Raffy Fahim , Hany Hassan Awadalla

Mixture of experts (MoE) is a popular technique to improve capacity of Large Language Models (LLMs) with conditionally-activated parallel experts. However, serving MoE models on memory-constrained devices is challenging due to the large…

Artificial Intelligence · Computer Science 2024-05-30 Rui Kong , Yuanchun Li , Qingtian Feng , Weijun Wang , Xiaozhou Ye , Ye Ouyang , Linghe Kong , Yunxin Liu

While modern internet services, such as chatbots, search engines, and online advertising, demand the use of large-scale deep neural networks (DNNs), distributed training and inference over heterogeneous computing systems are desired to…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-08-13 Dianhai Yu , Liang Shen , Hongxiang Hao , Weibao Gong , Huachao Wu , Jiang Bian , Lirong Dai , Haoyi Xiong

Modern recommendation models have increased to trillions of parameters. As cluster scales expand to O(1k), distributed training bottlenecks shift from computation and memory to data movement, especially lookup and communication latency…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-04-09 Zhida Jiang , Zhaolong Xing , Huichao Chai , Tianxing Sun , Qiang Peng , Baopeng Yuan , Jiaxing Wang , Hua Du , Zhixin Wu , Xuemiao Li , Yikui Cao , Xinyu Liu , Yongxiang Feng , Zhen Chen , Ke Zhang

Sparsely gated Mixture-of-Expert (MoE) has demonstrated its effectiveness in scaling up deep neural networks to an extreme scale. Despite that numerous efforts have been made to improve the performance of MoE from the model design or system…

Machine Learning · Computer Science 2023-02-21 Chang Chen , Min Li , Zhihua Wu , Dianhai Yu , Chao Yang

To support large-scale model training, split learning (SL) enables multiple edge devices/servers to share the intensive training workload. However, most existing works on SL focus solely on two-tier model splitting. Moreover, while some…

Networking and Internet Architecture · Computer Science 2025-09-19 Wei Wei , Zheng Lin , Tao Li , Xuanheng Li , Xianhao Chen

Mixture of Experts (MoE) architectures have emerged as pivotal for scaling Large Language Models (LLMs) efficiently. Fine-grained MoE approaches - utilizing more numerous, smaller experts - have demonstrated potential in improving model…

Machine Learning · Computer Science 2025-06-04 Jakub Krajewski , Marcin Chochowski , Daniel Korzekwa

The increasing demand for deploying large Mixture-of-Experts (MoE) models in resource-constrained environments necessitates efficient approaches to address their high memory and computational requirements challenges. Moreover, given that…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-09-10 HamidReza Imani , Abdolah Amirany , Tarek El-Ghazawi

Despite the demonstrated parameter efficiency of prompt-based fusion, its limited adaptivity and expressiveness hinder its effectiveness for multimodal applications at scale. In this paper, we present the first comprehensive study…

Machine Learning · Computer Science 2025-11-17 Ruixiang Jiang , Lingbo Liu , Changwen Chen

While Mixture of Experts (MoE) models achieve remarkable efficiency by activating only subsets of parameters, they suffer from high memory access costs during inference. Memory-layer architectures offer an appealing alternative with very…

Machine Learning · Computer Science 2025-08-27 Zihao Huang , Yu Bao , Qiyang Min , Siyan Chen , Ran Guo , Hongzhi Huang , Defa Zhu , Yutao Zeng , Banggu Wu , Xun Zhou , Siyuan Qiao

Mixture-of-Experts (MoE) models offer computational efficiency during inference by activating only a subset of specialized experts for a given input. This enables efficient model scaling on multi-GPU systems that use expert parallelism…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-06-18 Zachary Doucet , Rishi Sharma , Martijn de Vos , Rafael Pires , Anne-Marie Kermarrec , Oana Balmau

The unabated growth in AI workload demands is driving the need for concerted advances in compute, memory, and interconnect performance. As traditional semiconductor scaling slows, high-speed interconnects have emerged as the new scaling…

Hardware Architecture · Computer Science 2025-10-21 Mikhail Bernadskiy , Peter Carson , Thomas Graham , Taylor Groves , Ho John Lee , Eric Yeh

Large language models (LLMs) with mixture-of-experts (MoE) architectures achieve remarkable scalability by sparsely activating a subset of experts per token, yet their frequent expert switching creates memory bandwidth bottlenecks that…

Machine Learning · Computer Science 2026-05-13 Wenyong Zhou , Yuannuo Feng , Yizhe Chen , Taiqiang Wu , Wendong Xu , Wenbo Qi , Zhengwu Liu , Wang Kang , Ngai Wong

Prevailing LLM serving engines employ expert parallelism (EP) to implement multi-device inference of massive MoE models. However, the efficiency of expert parallel inference is largely bounded by inter-device communication, as EP embraces…

Machine Learning · Computer Science 2026-03-02 Yan Li , Zhenyu Zhang , Zhengang Wang , Pengfei Chen , Pengfei Zheng

Mixture-of-Experts (MoE) models promise efficient scaling of large language models (LLMs) by activating only a small subset of experts per token, but their parallelized inference pipelines make elastic serving challenging. Existing…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-10-06 Gursimran Singh , Timothy Yu , Haley Li , Cheng Chen , Hanieh Sadri , Qintao Zhang , Yu Zhang , Ying Xiong , Yong Zhang , Zhenan Fan

Large-scale Mixture-of-Experts (MoE) models rely on \emph{expert parallelism} for efficient training and inference, which splits experts across devices and necessitates distributed data shuffling to route each token to its assigned experts.…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-12-29 Zhuoran Zhu , Chunyang Zhu , Hao Lin , Xu Fu , Yiming Zhou , Quanlu Zhang , Zhenhua Li , Feng Qian , Chao Yu , Boxun Li , Guohao Dai , Yu Wang

Model parallelism has become a necessity for training modern large-scale deep language models. In this work, we identify a new and orthogonal dimension from existing model parallel approaches: it is possible to perform pipeline parallelism…

Machine Learning · Computer Science 2021-09-29 Zhuohan Li , Siyuan Zhuang , Shiyuan Guo , Danyang Zhuo , Hao Zhang , Dawn Song , Ion Stoica

Today's computing systems require moving data back-and-forth between computing resources (e.g., CPUs, GPUs, accelerators) and off-chip main memory so that computation can take place on the data. Unfortunately, this data movement is a major…

Hardware Architecture · Computer Science 2022-05-31 Geraldo F. Oliveira , Amirali Boroumand , Saugata Ghose , Juan Gómez-Luna , Onur Mutlu

How to reduce compute and memory requirements of neural networks (NNs) without sacrificing performance? Many recent works use sparse Mixtures of Experts (MoEs) to build resource-efficient large language models (LMs). Here we introduce…

Machine Learning · Computer Science 2023-11-22 Róbert Csordás , Kazuki Irie , Jürgen Schmidhuber