Hejing Li

Campus E1 5
66123 Saarbrücken
Germany
Email: hejingli@mpi-sws.org

I am a fourth-year PhD student at MPI-SWS advised by Antoine Kaufmann after two years of experience as a research engineer at the same place. Before that I received my B.S. and M.S. from EE department at KAIST. At KAIST I was part of the INA lab advised by Dongsu Han.

Publications

CoNext’25

SplitSim: Towards Practical Large-Scale Full-System Simulation for Systems Research

Hejing, Jialin Li, and Antoine Kaufmann

In To Appear in CoNext 2025 2025
WORDS’22

Improving Disaggregated System Evaluation with Modular End-to-End Simulation

Bin Gao, Hejing Li, Jialin Li, and Antoine Kaufmann

In 3rd Workshop On Resource Disaggregation and Serverless Computing 2022
SIGCOMM’22

SimBricks: End-to-End Network System Evaluation with Modular Simulation

Hejing Li, Jialin Li, and Antoine Kaufmann

In Proceedings of the ACM SIGCOMM 2022 Conference 2022

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Full system "end-to-end" measurements in physical testbeds are the gold standard for network systems evaluation but are often not feasible. When physical testbeds are not available we frequently turn to simulation for evaluation. Unfortunately, existing simulators are insufficient for end-to-end evaluation, as they either cannot simulate all components, or simulate them with inadequate detail.We address this through modular simulation, flexibly combining and connecting multiple existing simulators for different components, including processor and memory, devices, and network, into virtual end-to-end testbeds tuned for each use-case. Our architecture, SimBricks, combines well-defined component interfaces for extensibility and modularity, efficient communication channels for local and distributed simulation, and a co-designed efficient synchronization mechanism for accurate timing across simulators. We demonstrate SimBricks scales to 1000 simulated hosts, each running a full software stack including Linux, and that it can simulate testbeds with existing NIC and switch RTL implementations. We also reproduce key findings from prior work in congestion control, NIC architecture, and in-network computing in SimBricks.
APNet’20

Leveraging SIMD parallelism for accelerating network applications

Hejing Li, Juhyeng Han, and Dongsu Han

In 4th Asia-Pacific Workshop on Networking 2020

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