Friedrich-Alexander-Universität Erlangen-Nürnberg  /   Technische Fakultät  /   Department Informatik
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Stefan Reif

Member of the research staff at the
Department of Computer Science 4 (Distributed Systems and Operating Systems) at
Friedrich-Alexander-Universität Erlangen-Nürnberg.

Research Topics

  • Energy-Aware Systems
  • Efficient, scalable and predictable Parallel Systems

Research Projects

LARN Latency- and Resilience-Aware Networking (DFG SPP 1914)
PAX Power-Aware Critical Sections (DFG)
LAOS Latenzgewahrheit in Betriebssystemen für massiv-parallele Prozessoren (DFG)

Publications

(automatically exported by UnivIS)

2021

Gerhorst, Luis ; Herzog, Benedict ; Reif, Stefan ; Schröder-Preikschat, Wolfgang ; Hönig, Timo:
AnyCall: Fast and Flexible System-Call Aggregation.
In: ACM (Ed.) : Proceedings of the 11th Workshop on Programming Languages and Operating Systems (PLOS'21)
(11th Workshop on Programming Languages and Operating Systems, virtual, 2021-10-25).
2021, pp 1-8.
Keywords: Neon; ANTILLAS
[doi>10.1145/3477113.3487267]

Herzog, Benedict ; Hügel, Fabian ; Reif, Stefan ; Hönig, Timo ; Schröder-Preikschat, Wolfgang:
Automated Selection of Energy-efficient Operating System Configurations.
In: ACM (Ed.) : Proceedings of the 2nd International Workshop on Energy-Efficient Learning at the Edge (WEEE'21)
(2nd International Workshop on Energy-Efficient Learning at the Edge, virtual, 2021-06-28).
2021, pp 1-7.
Keywords: InvasIC; Coke; ANTILLAS

Eichler, Christian ; Hofmeier, Henriette ; Reif, Stefan ; Hönig, Timo ; Nolte, Jörg ; Schröder-Preikschat, Wolfgang:
Neverlast: Towards the Design and Implementation of the NVM-based Everlasting Operating System.
In: - (Ed.) : Proceedings of the 54th Hawaii International Conference on System Sciences (HICSS54)
(54th Hawaii International Conference on System Sciences, virtual, 2021-01-04).
Honolulu, HI, USA : ScholarSpace, 2021, pp 7227-7236.
[doi>10.24251/HICSS.2021.870]

Reif, Stefan ; Herzog, Benedict ; Hemp, Judith ; Hönig, Timo ; Schröder-Preikschat, Wolfgang:
Poster: AI Waste Prevention: Time and Power Estimation for Edge Tensor Processing Units.
In: Astrid Nieße ; Omid Ardakanian (Ed.) : Proceedings of the Twelfth ACM International Conference on Future Energy Systems (e-Energy 2021)
(Twelfth ACM International Conference on Future Energy Systems (e-Energy 2021), Torino, Italy, June 28 - July 2, 2021).
New York : ACM, 2021. (Poster Abstract)
Keywords: InvasIC; eLARN; PAX; ANTILLAS

Herzog, Benedict ; Reif, Stefan ; Hügel, Fabian ; Hönig, Timo ; Schröder-Preikschat, Wolfgang:
Poster: Towards Automated System-Level Energy-Efficiency Optimisation using Machine Learning.
In: ACM (Ed.) : Proceedings of the Twelfth ACM International Conference on Future Energy Systems (e-Energy 2021)
(Twelfth ACM International Conference on Future Energy Systems (e-Energy 2021), Torino, Italy, June 28 - July 2, 2021).
New York : ACM, 2021. (Poster Abstract)
Keywords: InvasIC; eLARN; Coke; ANTILLAS

Herzog, Benedict ; Reif, Stefan ; Preis, Julian ; Schröder-Preikschat, Wolfgang ; Hönig, Timo:
The Price of Meltdown and Spectre: Energy Overhead of Mitigations at Operating System Level.
In: ACM (Ed.) : Proceedings of the 14th European Workshop on Systems Security (EuroSec'21)
(14th European Workshop on Systems Security, virtual, 2021-04-26).
2021, pp 8-14.
Keywords: InvasIC; eLARN; ANTILLAS
[doi>10.1145/3447852.3458721]

2020

Gerhorst, Luis ; Reif, Stefan ; Herzog, Benedict ; Hönig, Timo:
EnergyBudgets: Integrating Physical Energy Measurement Devices into Systems Software.
In: IEEE (Ed.) : Proceedings of the 2020 Brazilian Symposium on Computing Systems Engineering (SBESC '20)
(Brazilian Symposium on Computing Systems Engineering, online, 2020-11-23).
2020, pp 1-8.
Keywords: energy aware systems; tools; performance evaluation; resource management; design methodologies

Reif, Stefan ; Herzog, Benedict ; Hügel, Fabian ; Hönig, Timo ; Schröder-Preikschat, Wolfgang:
Nearly Symmetric Multi-Core Processors.
In: ACM (Ed.) : Proceedings of the 11th ACM SIGOPS Asia-Pacific Workshop on Systems
(The 11th ACM SIGOPS Asia-Pacific Workshop on Systems, Tsukuba, Japan, 2020-08-24).
2020, pp 1–8.
Keywords: InvasIC; eLARN; LAOS

Reif, Stefan ; Herzog, Benedict ; Hemp, Judith ; Hönig, Timo ; Schröder-Preikschat, Wolfgang:
Precious: Resource-Demand Estimation for Embedded Neural Network Accelerators.
In: mlsys.org (Ed.) : Proceedings of the 1st International Workshop on Benchmarking Machine Learning Workloads on Emerging Hardware
(1st International Workshop on Benchmarking Machine Learning Workloads on Emerging Hardware (CHALLENGE'20), Austin, TX, USA, 04.03.2020).
2020, pp 1-9.
Keywords: InvasIC, PAX, eLARN

Reif, Stefan ; Schröder-Preikschat, Wolfgang:
Precisely Timed Task Execution.
In: IEEE (Ed.) : Proceedings of the 23rd International Symposium on Real-Time Distributed Computing
(International Symposium on Real-Time Distributed Computing (ISORC 2020), Nashville, TN, USA, May 19-21).
2020, pp 1-10.
Keywords: Latency; Jitter; OS Noise; Predictability; Interference; Timed Task Execution

Reif, Stefan ; Raffeck, Phillip ; Ulbrich, Peter ; Schröder-Preikschat, Wolfgang:
Work In Progress: Control-Flow Migration for Data-Locality Optimisation in Multi-Core Real-Time Systems.
In: IEEE (Ed.) : Proceedings of the 41st Real-Time Systems Symposium (RTSS 2020)
(41st Real-Time Systems Symposium (RTSS 2020), virtual, 2020-12-1).
2020, pp 1-4.

Reif, Stefan ; Herzog, Benedict ; Gil Pereira, Pablo ; Schmidt, Andreas ; Büttner, Tobias ; Hönig, Timo ; Schröder-Preikschat, Wolfgang ; Herfet, Thorsten:
X-Leep: Leveraging Cross-Layer Pacing for Energy-Efficient Edge Systems.
In: ACM (Ed.) : Proceedings of the 1st Workshop on Energy Efficiency at the Edge
(The 1st Workshop on Energy Efficiency at the Edge (WEEE 2020), virtuell, 2020-06-26).
2020, pp 1-6.
Keywords: Energy Efficiency; DVFS; Real-Time Communication; Cross-Layer Pacing; Edge Computing; Internet of Thingss
[doi>10.1145/3396851.3402924]

2019

Schmidt, Andreas ; Reif, Stefan ; Pereira, Pablo Gil ; Hönig, Timo ; Herfet, Thorsten ; Schröder-Preikschat, Wolfgang:
Cross-Layer Pacing for Predictably Low Age of Information.
In: - (Ed.) : Proceedings of Informatik 2019
(Informatik 2019, Kassel).
2019, pp 1-2.
Keywords: : Cross-Layer Optimization; Pacing; Age of Information; Low Latency; Transport Protocols

Schmidt, Andreas ; Reif, Stefan ; Gil Pereira, Pablo ; Hönig, Timo ; Herfet, Thorsten ; Schröder-Preikschat, Wolfgang:
Cross-Layer Pacing for Predictably Low Latency.
In: - (Ed.) : Proceedings of the 6th International IEEE Workshop on Ultra-Low Latency in Wireless Networks (ULLWN)
(IEEE Workshop on Ultra-Low Latency in Wireless Networks (ULLWN), Paris, France, 29.04.2019).
2019, pp 1-6.
Keywords: cross-layer optimization; low-latency networking; pacing; transport protocols

Reif, Stefan ; Raffeck, Phillip ; Janker, Heiko ; Gerhorst, Luis ; Hönig, Timo ; Schröder-Preikschat, Wolfgang:
Earl: Energy-Aware Reconfigurable Locks.
In: - (Ed.) : Proceedings of the 9th Embedded Operating Systems Workshop (EWiLi 2019)
(EWiLi 2019 – The Embedded Operating Systems Workshop, New York, 17.10.2019).
2019, pp 1-6.
Keywords: Energy-aware systems, Dynamic reconfiguration, Mutual exclusion

Gallenmüller, Sebastian ; Glebke, René ; Günther, Stephan ; Hauser, Eric ; Leclaire, Maurice ; Reif, Stefan ; Rüth, Jan ; Schmidt, Andreas ; Carle, Georg ; Herfet, Thorsten ; Schröder-Preikschat, Wolfgang ; Wehrle, Klaus:
Enabling Wireless Network Support for Gain Scheduled Control.
In: - (Ed.) : Proceedings of the 2nd International Workshop on Edge Systems, Analytics and Networking
(2nd International Workshop on Edge Systems, Analytics and Networking, Dresden, 25.03.2019).
2019.
Keywords: edge computing; networking; control; latency-awareness; gain scheduling; reproducible wireless measurements

Reif, Stefan ; Gerhorst, Luis ; Bender, Kilian ; Hönig, Timo:
Towards Low-Jitter and Energy-Efficient Data Processing in Cyber-Physical Information Systems.
In: IEEE Computer Society (Ed.) : Proceedings of the 52nd Hawaii International Conference on System Sciences (HICSS)
(Hawaii International Conference on System Sciences (HICSS), Maui, HI, USA, 8. - 11. January 2019).
2019, pp 7262-7269.

2018

Reif, Stefan ; Schmidt, Andreas ; Hönig, Timo ; Herfet, Thorsten ; Schröder-Preikschat, Wolfgang:
X-Lap: A Systems Approach for Cross-Layer Profiling and Latency Analysis for Cyber-Physical Networks.
In: ACM SIGBED (Ed.) : Special Issue on 15th International Workshop on Real-Time Networks (RTN 2017).
Vol. 15, 3. Edition New York : Association for Computing Machinery (ACM), 2018, pp 19-24.

Reif, Stefan ; Schmidt, Andreas ; Hönig, Timo ; Herfet, Thorsten ; Schröder-Preikschat, Wolfgang:
Delta: Differential Energy-Efficiency, Latency, and Timing Analysis for Real-Time Networks.
In: - (Ed.) : Proceedings of the 16th International Workshop on Real-Time Networks (RTN'2018)
(The 16th International Workshop on Real-Time Networks (RTN'2018), Barcelona, Spain, July 3).
2018, pp 1-6.
Keywords: Cyber-physical networks; Network reliability; Real-time systems; Embedded and cyber-physical systems; Dependable and fault-tolerant systems and networks

Herzog, Benedict ; Gerhorst, Luis ; Heinloth, Bernhard ; Reif, Stefan ; Hönig, Timo ; Schröder-Preikschat, Wolfgang:
INTSPECT: Interrupt Latencies in the Linux Kernel.
In: IEEE (Ed.) : Proceedings of the 2018 Brazilian Symposium on Computing Systems Engineering (SBESC '18)
(Brazilian Symposium on Computing Systems Engineering, Salvador, Brazil, 6. - 9. 11. 2018).
2018, pp 1-8.
Keywords: Linux; Interrupts; Latency; Measurements

Reif, Stefan ; Schröder-Preikschat, Wolfgang:
POSTER: A Predictable Synchronisation Algorithm.
In: ACM SIGPLAN (Ed.) : Proceedings of the 23rd Annual Symposium on Principles and Practice of Parallel Programming (PPoPP 2018)
(23rd Annual Symposium on Principles and Practice of Parallel Programming (PPoPP 2018), Vienna, Austria, February 24-28).
2018, pp 415-416. - ISBN 978-1-4503-4982-6
Keywords: Concurrent Data Structures; Parallel Algorithms; Synchronization; Predictability
[doi>10.1145/3178487.3178533]

Reif, Stefan ; Schröder-Preikschat, Wolfgang:
Predictable Synchronisation Algorithms for Asynchronous Critical Sections.
Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU). 2018
(CS-2018-03). - Internal report. 15 pages (Technical reports / Department Informatik Vol. CS-2018-03) ISSN 2191-5008
[doi>10.25593/issn.2191-5008/CS-2018-03]

2017

Reif, Stefan ; Hönig, Timo ; Schröder-Preikschat, Wolfgang:
In the Heat of Conflict: On the Synchronisation of Critical Sections.
In: IEEE (Ed.) : Proceedings of the 20th International Symposium on Real-Time Distributed Computing (ISORC 2017)
(20th International Symposium on Real-Time Distributed Computing (ISORC 2017), Toronto, Canada, May 16-18, 2017).
2017.
Keywords: Performance and Energy Analysis, Synchronisation, System Software, Real-time Kernels and OS, Embedded Systems, Energy-aware Systems

Reif, Stefan ; Schmidt, Andreas ; Hönig, Timo ; Herfet, Thorsten ; Schröder-Preikschat, Wolfgang:
X-Lap: A Systems Approach for Cross-Layer Profiling and Latency Analysis for Cyber-Physical Networks.
In: - (Ed.) : Proceedings of the 15th International Workshop on Real-Time Networks (RTN'2017)
(The 15th International Workshop on Real-Time Networks (RTN'2017), Dubrovnic, Croatia, June 27, 2017).
2017.
Keywords: Networks; Cyber-physical networks; Network reliability; Computer systems organization; Real-time systems; Embedded and cyber-physical systems; Dependable and fault-tolerant systems and networks;

Academic Activities

SBESC 2021 Secondary Reviewer for the XI Brazilian Symposium on Computing Systems Engineering
EMSOFT 2021 Secondary Reviewer for the 2021 International Conference on Embedded Software
ISORC 2021 Secondary Reviewer for the 2021 International Symposium on Real-Time Distributed Computing
EMSOFT 2020 Secondary Reviewer for the 2020 International Conference on Embedded Software
ISORC 2020 Secondary Reviewer for the 2020 International Symposium on Real-Time Distributed Computing
EMSOFT 2019 Secondary Reviewer for the 2019 International Conference on Embedded Software
ARCS 2019 Secondary Reviewer for the 2019 International Conference on Architecture of Computing Systems
EuroSys 2019 Shadow PC member of the 2019 European Conference on Computer Systems
EMSOFT 2018 Secondary Reviewer for the 2018 International Conference on Embedded Software
ARCS 2018 Secondary Reviewer for the 2018 International Conference on Architecture of Computing Systems
ARCS 2017 Secondary Reviewer for the 2017 International Conference on Architecture of Computing Systems
RTSS 2016 Secondary Reviewer for the 2016 Real-Time Systems Symposium

Teaching

Winter Term 2020

Previous Terms []

Summer Term 2020

Winter Term 2019

Summer Term 2019

Winter Term 2018

Summer Term 2018

Winter Term 2017

Summer Term 2017

Winter Term 2016

Summer Term 2016

Summer Term 2015

Winter Term 2014

Summer Term 2014

Summer Term 2013

Winter Term 2012

Previous Terms [|]

Theses

(automatically exported by UnivIS)

Finished Theses

Analysis and Prediction of Execution Time and Power Demand of Artificial Neural Network Inferences on a Tensor Processing
Student: Judith Hemp (handed in on 07.09.2020 )
Supervisors: Prof. Dr.-Ing. habil. Wolfgang Schröder-Preikschat, Benedict Herzog, M. Sc., Stefan Reif, M. Sc., Prof. Dr.-Ing. Timo Hönig


Analysis of Interrupt Latencies in the Linux Kernel
Student: Luis Gerhorst (handed in on 03.12.2018 )
Supervisors: Prof. Dr.-Ing. habil. Wolfgang Schröder-Preikschat, Benedict Herzog, M. Sc., Stefan Reif, M. Sc., Bernhard Heinloth, M. Sc., Prof. Dr.-Ing. Timo Hönig


Approximate Computing by Dynamic Function Swapping
Student: Dominic Braun (handed in on 11.10.2019 )
Supervisors: Prof. Dr.-Ing. habil. Wolfgang Schröder-Preikschat, Benedict Herzog, M. Sc., Stefan Reif, M. Sc., Prof. Dr.-Ing. Timo Hönig


Energy Implications of Spectre and Meltdown Mitigations
Student: Julian Preis (handed in on 01.02.2021 )
Supervisors: Prof. Dr.-Ing. habil. Wolfgang Schröder-Preikschat, Prof. Dr.-Ing. Timo Hönig, Benedict Herzog, M. Sc., Stefan Reif, M. Sc.


Low-power Real-time Communication in Linux-based Embedded Systems
Student: Tobias Büttner (handed in on 01.04.2020 )
Supervisors: Prof. Dr.-Ing. habil. Wolfgang Schröder-Preikschat, Stefan Reif, M. Sc., Benedict Herzog, M. Sc., Prof. Dr.-Ing. Timo Hönig

Own Master's Thesis