UCLA Computer Science

Harry Xu

Professor, Computer Science Department, Samueli School of Engineering, University of California, Los Angeles.

Office: Engineering VI, Room 496A
harryxu at cs dot ucla dot edu

Email Publications GitHub Repos
Harry Xu

About Me

I am a Professor in the Computer Science Department of University of California, Los Angeles. My research broadly covers computer systems, spanning programming languages, compilers, runtime/operating systems, distributed systems, and computer architecture. My current focus includes two main areas: (1) building infrastructures for future cloud computing, particularly user-defined clouds, and (2) creating scalable and cost-effective infrastructures for AI applications.

I was among the first academic researchers to address the problem of software bloat, a field that eventually led to ONR's $200M TPCP program. We recently developed kvcached, a GPU memory sharing system that has been used by many large enterprises to support their production LLM serving workloads across more than 10K GPUs. In recognition of these contributions, I received the 2018 Dahl-Nygaard Junior Prize and am an ACM Distinguished Scientist.

Professional

Current Projects Some Recent Papers

Research Group

  • Junyi Shu, PostDoc Researcher starting 2025, Outstanding PhD Dissertation Award at PKU
  • Shan Yu, Ph.D. student starting Fall 2022, Intel DRA Award, Cisco "You Amaze 2" Technical Excellence Award, AWS AI Fellowship
  • Zhenting Zhu, Ph.D. student starting Fall 2023, Yao Award, Andrew Yao Class at Tsinghua, Gold Medalist IOI 2018
  • Shu Anzai, Ph.D. student starting Fall 2023, Funai Overseas Scholarship, University of Tokyo
  • Yicheng Liu, Ph.D. student starting Fall 2024, co-advised with Sam Kumar, Top Graduate of Shanghai Jiaotong University
  • Yue Jin, Ph.D. student starting Fall 2025, Most Innovative Spirit Award from the Ant Group

Alumni

  • Shi Liu, Ph.D. 2025, UCLA to Databricks
  • Jiyuan Wang (LinkedIn), Ph.D. 2025, UCLA to AWS to Tulane University
  • Haoran Ma, Ph.D. 2024, UCLA to ByteDance AI Infra
  • Yifan Qiao (LinkedIn), Ph.D. 2024, UCLA to Postdoc Berkeley to Inferact
  • Christian Navasca, Ph.D. 2023, UCLA to BreezeML
  • Pengzhan Zhao, M.S. 2023, UCLA to BreezeML to AMD
  • Chenxi Wang, PostDoc 2018-2022, UCLA to Associate Professor, Institute of Computing Technology, Chinese Academy of Sciences
  • Jonathan Eyolfson, PostDoc 2018-2022, UCLA to Assistant Professor in teaching stream, University of Toronto
  • John Thorpe, Ph.D. 2022, UCLA to BreezeML Inc.
  • Arthi Padmanabhan (LinkedIn), Ph.D. 2022, UCLA to Assistant Professor, Harvey Mudd College
  • Usama Hameed, M.S. 2022, UCLA to Apple
  • Yuanqi Li, startup founder
  • Khanh Nguyen, Ph.D. 2019, UCLA to Assistant Professor at Texas A&M University
  • Kai Wang, Ph.D. 2019, UCLA to Facebook System & Infrastructure
  • Zhiqiang Zuo, PostDoc 2015-2018, UCI to Assistant Professor at Nanjing University
  • Lu Fang, Ph.D. 2017, UCI to Facebook AI, co-creator of PyTorch and ONNX
  • Keval Vora, Ph.D. 2017, co-advised with Rajiv Gupta, UCR to Assistant Professor at Simon Fraser University
  • Shen Teng, M.S. 2021, UCLA to AWS
  • Gaohong Liu, M.S. 2021, UCLA to RED to ByteDance Seed
  • Cheng Cai, M.S. 2020, UCLA to Facebook
  • Bojun Wang, M.S. 2019, UCI to Arista Networks
  • Guanzhou Hu, CSST 2019, UCLA to Ph.D. student at UWisc
  • Tim Nguyen, B.S. 2017, UCI to Facebook
  • Aftab Hussain, M.S. Fall 2017
  • Matthew Hartz, B.S. 2015
  • Jianfei Hu, M.S. 2015, UCI to Google to ClickHouse
  • Michael Li, 2018 summer intern from Newport Senior High to University of Washington
  • Chengxi Li, 2017 summer intern from Beckman High to Berkeley CS
  • Emily Hu, 2016 summer intern from Northwood High to Berkeley CS to Capital One
  • Lawrence Xu, 2016 summer intern from University High to Purdue CS
  • Louis Zhang, 2014 summer intern from Troy High to Berkeley CS
  • Ankur Gupta, 2014 summer intern from University High to Regent's Scholar at UCSD CS
  • Wendy Wei, 2013 summer intern from University High to MIT CS
  • Allen Min, 2012 summer intern from Whitney High to UCI CS
  • Jonathon Tsai, 2012 summer intern from Whitney High to UCI CS

Teaching

  • CS 239: Large-Scale Machine Learning Systems, Spring 2020, Spring 2025, Spring 2026
  • CS 111: Operating Systems, Spring 2019, Winter 2020, Winter 2021, Winter 2022, Winter 2026
  • CS 214: Big Data Systems, Fall 2018, Fall 2019, Fall 2020, Fall 2021, Winter 2025, Winter 2026

Recent Services

Released Software Systems Our GitHub Repos

  • The Open GPU Sharing Project
  • Atlas: A hybrid data plane for remote memory applications
  • DRust: An ownership-based DSM system
  • VQPy: An object-oriented approach to video analytics queries
  • Midas: Soft Memory as an OS service
  • Hermit: Remote memory swap via feedback-directed asynchrony
  • Canvas: An isolated and adaptive swap system for remote memory
  • MemLiner: A remote-memory-friendly runtime system
  • Mako: A low-pause evacuating collector for memory-disaggregated datacenters
  • Dorylus: Affordable and scalable GNN training
  • JPortal: Java Virtual Machine support for Intel PT
  • Chianina: Graph system for context- and flow-sensitive static analysis
  • Semeru: A memory-disaggregated managed runtime
  • Reducto: On-camera frame filtering for video analytics
  • Grapple: Graph system for finite-state property checking
  • RStream: A single-machine, disk-based graph mining system
  • Graspan: Disk-based parallel graph system for dynamic transitive closure

Why I Believe

I am a Protestant Christian. I regularly attend and help with several campus fellowships at both UCLA and UC Irvine.

Contact Information

harryxu at cs dot ucla dot edu
http://www.cs.ucla.edu/~harryxu

Office:
Engineering VI, Room 496A
Computer Science Department
BOX 951596, UCLA
Los Angeles, CA 90095-1596
Work: 310-794-7145

Last updated: May 4, 2026. Maintained by OpenAI Codex.