Welcome to the Computer Systems Research Group

The mission of the Computer Systems Group is to advance the design of reliable, predictable, and efficient computer systems. Our research focuses on systems software, particularly operating systems and runtime systems, and their interaction with modern and emerging computing architectures. We investigate how to ensure dependable and predictable execution in time-critical systems, as well as how to efficiently manage computing and memory resources in increasingly heterogeneous architectures. In teaching, we offer courses, seminars, and thesis projects in operating systems, real-time systems, and systems software.

Please refer to our research and teaching pages for more detailed information.

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28.10.2026

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Our research focuses on the design and implementation of systems software for modern and emerging computing platforms. We investigate how operating systems, runtime systems, and computing architectures can work together to address the challenges of increasingly complex applications and heterogeneous hardware.

Our research is organized around two main directions:

Dependable and Predictable Systems Software

We investigate operating systems and runtime mechanisms for real-time, embedded, and safety-critical applications. Our research addresses scheduling, resource management, timing analysis, and fault tolerance, with the goal of ensuring correct and timely execution under diverse operating conditions.

Systems Software for Memory-Centric Computing

We explore how systems software can exploit emerging memory technologies and heterogeneous computing architectures. Our research focuses on operating system, compiler, and runtime support for memory management, data placement, and resource optimization, including processing-in-memory and heterogeneous memory systems.

Across both directions, we pursue cross-layer approaches that bridge software and hardware to address fundamental challenges in system design.

Please refer to our publications and research projects for further details.

Pub­lic­a­tions

2026

How Much Energy Is Wasted in LLM operations? Evidence from Kernel-Level DVFS

J. Spaan, K.-H. Chen, A.-L. Varbanescu, in: Proceedings of the 23rd ACM International Conference on Computing Frontiers, ACM, 2026.


Efficient Hash-to-Index via Rejection Sampling for Online Fault Detection with Bloom/Cuckoo Filters

E.S. Cishugi, K.-H. Chen, M. Ottavi, in: 2026 IEEE European Test Symposium (ETS), IEEE, 2026.


Releaser Design and Schedulability Analysis for Care-Taking Tasks in Real-Time Systems

N. Hölscher, K. Heider, G. von der Brüggen, M. Günzel, K.-H. Chen, J.-J. Chen, in: 2026 IEEE 32nd Real-Time and Embedded Technology and Applications Symposium (RTAS), IEEE, 2026.


Instruction Error Detection With Bloom Filters: Architecture, Radiation Testing, and Fault Injection

E.S. Cishugi, T.T. Smit, B. Forlin, C. Cazzaniga, K.-H. Chen, M. Ottavi, IEEE Transactions on Device and Materials Reliability 26 (2026) 752–760.


2025

LazyTick: Lazy and Efficient Management of Job Release in Real-Time Operating Systems

K. Heider, C. Hakert, K.-H. Chen, J.-J. Chen, ACM Transactions on Embedded Computing Systems 24 (2025) 1–25.



Introduction to the Special Issue on Fault-Resilient Cyber-Physical Systems—Part 2

K.-H. Chen, J. Li, F. Reghenzani, J.-J. Chen, ACM Transactions on Cyber-Physical Systems 9 (2025) 1–2.


Optimizing Electric Vehicle Scheduling with Charging Guarantees using Flow Models with Local Penalties

L. Winschermann, M. Günzel, K.-H. Chen, J. Hurink, in: Proceedings of the 16th ACM International Conference on Future and Sustainable Energy Systems, ACM, 2025.


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Teach­ing

Our teaching focuses on the fundamental principles and practical aspects of modern computer systems. We aim to equip students with the knowledge and skills to understand, design, implement, and critically analyze complex systems software.

We combine theoretical foundations with hands-on experience in programming, implementing, and evaluating operating systems and low-level software.

We offer courses and opportunities for Bachelor's and Master's theses in our research areas.

Courses in Winter Semester 2026/27:

Master:

 L.079.05782 Real-Time Operating Systems: Design and Implementations( in English)
Prof. Dr. Kuan-Hsun Chen 
Di, 13. Okt. 2026 [09:00] - Di, 2. Feb. 2027 [11:00]
 Vorlesung (mit Übung)

Seminar:

Con­tact

Prof. Dr.-Ing. Kuan-Hsun Chen

Computersysteme

Room O2.167
Paderborn University
Pohlweg 51
33098 Paderborn

Office hours

By appointment.