Biography

I am a second-year Ph.D. Student at the Department of Computer Science and Engineering, The Chinese University of Hong Kong (CUHK), under the supervision of Prof. Hong Xu since Fall 2024. Before that, I received my B.Eng. degree in Software Engineering from Nanjing University in 2024. I am interested in system design for Machine Learning (MLSys), LLMs and general machine learning problems.

Recent News

• [07/2026] Echo is accepted to SC 26
• [04/2026] ReasonCache is accepted to IEEE/ACM IWQoS 26
• [08/2024] I Join CUHK CSE as a Ph.D. Student. New Journey Starts!
• [06/2024] I Graduate from Nanjing University(NJU) as an Outstanding Graduate.  
• [05/2024] I Finish the 6-Month Internship in MSRA.

Publication

• Kaiwen Chen, Xin Tan, Jingzong Li, Hong Xu. “Libra: Efficient Resource Management for Agentic RL Post-Training”, in arXiv Preprint, June 2026. 📄 Paper

• Kaiwen Chen, Xin Tan, Minchen Yu, Jingzong Li, Hong Xu. “ReasonCache: Accelerating Large Reasoning Model Serving through KV Cache Sharing”, IEEE/ACM International Symposium on Quality of Service (IWQoS), 2026 📄 Paper

• Yicheng Feng, Kin Hang Sew, Yuetao Chen, Kaiwen Chen, Jingzong Li, Tianyuan Wu, Zheng Zhou, Peng Cheng, Chuan Wu, Wei Wang, Tsung-Yi Ho, Hong Xu. “Scalable and Efficient Simulation of LLM Training”, International Conference for High Performance Computing, Networking, Storage, and Analysis (SC), 2026. 📄 Paper 💻 Code

Education

• The Chinese University of Hong Kong, Hong Kong SAR, China 2024 Aug – Present

  Ph.D. in Computer Science and Engineering

• Nanjing University, Nanjing, China, 2020 Sep – 2024 Jun

  B.E. in Software Engineering

Internship

• Network Research Group @ Microsoft Research Asia, Nov. 2023 - May. 2024
• Software Engineer @ Meituan, Jun. 2023 - Aug. 2023

Selected Awards

• People’s Scholarship, Nanjing University, 2021, 2022, 2023
• Outstanding Student (only 5% annually), Nanjing University, 2021,2022,2023 

Teaching

• Teaching Assistant: CSCI 3150, Introduction to Operating Systems, CUHK. 2024 Fall
• Teaching Assistant: CSCI 3320, Fundamentals of Machine Learning, CUHK. 2025 Spring
• Teaching Assistant: CSCI 2040, Introduction to Python. 2025 Fall
• Teaching Assistant: CSCI 3320, Fundamentals of Machine Learning, CUHK. 2026 Spring