Thomas Gruber

Development LIKWID, ClusterCockpit & MachineState

Erlangen National High Performance Computing Center
Software & Tools Division

Room 1.025
Martensstraße 1
91058 Erlangen
Germany

Phone number: +49 9131 85-28911
Fax number: +49 9131 302941
Email: thomas.gruber@fau.de

GitHub: Page of Thomas Gruber

Short Bio

During his apprenticeship at the Erlangen Regional Computing Center (RRZE), the IT service provider for the Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Thomas Gruber collected experience with all kinds of clustering approaches. Afterwards, he studied Computer Science at RWTH Aachen University with emphasis on parallel programming and operating system kernel development. At the same time, he worked as a research assistant for the HPC group of the RWTH IT center. After receiving his M. Sc. degree, he went back to RRZE to work for the HPC group. Since 2021, he works in the Software & Tools division at Erlangen National High Performance Computing Center (NHR@FAU). Thomas Gruber leads the development of the performance tool suite LIKWID, which comprises easy-to-use tools for hardware performance monitoring, affinity control and micro-benchmarking. He also works on projects involving monitoring and analysis of hardware performance data. He is actively involved in tutorials and lectures about performance analysis and optimization, where he presents the LIKWID tools and leads hands-on exercises.

List of publications extracted from CRIS

2021

Alappat CL., Meyer N., Laukemann J., Gruber T., Hager G., Wellein G., Wettig T.:
Execution-Cache-Memory modeling and performance tuning of sparse matrix-vector multiplication and Lattice quantum chromodynamics on A64FX
In: Concurrency and Computation-Practice & Experience (2021)
ISSN: 1532-0626
DOI: 10.1002/cpe.6512
URL: https://onlinelibrary.wiley.com/doi/full/10.1002/cpe.6512

2020

Alappat CL., Laukemann J., Gruber T., Hager G., Wellein G., Meyer N., Wettig T.:
Performance Modeling of Streaming Kernels and Sparse Matrix-Vector Multiplication on A64FX
2020 IEEE/ACM Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems, PMBS 2020 (, 2020-11-12)
In: Proceedings of PMBS 2020: Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems 2020
DOI: 10.1109/PMBS51919.2020.00006

2019

Eitzinger J., Gruber T., Afzal A., Zeiser T., Wellein G.:
ClusterCockpit-A web application for job-specific performance monitoring
2019 IEEE International Conference on Cluster Computing, CLUSTER 2019 (Albuquerque, NM, 2019-09-23 - 2019-09-26)
In: Proceedings - IEEE International Conference on Cluster Computing, ICCC 2019
DOI: 10.1109/CLUSTER.2019.8891017
Hornich J., Hammer J., Hager G., Gruber T., Wellein G.:
Collecting and presenting reproducible intranode stencil performance: INSPECT
In: Supercomputing Frontiers and Innovations 6 (2019), p. 4-25
ISSN: 2409-6008
DOI: 10.14529/js?190301

2017

Röhl T., Eitzinger J., Hager G., Wellein G.:
LIKWID monitoring stack: A flexible framework enabling job specific performance monitoring for the masses
2017 IEEE International Conference on Cluster Computing, CLUSTER 2017
DOI: 10.1109/CLUSTER.2017.115

2015

Wellein G., Eitzinger J., Hager G., Röhl T.:
Overhead Analysis of Performance Counter Measurements
43rd International Conference on Parallel Processing Workshops, ICPPW 2014
DOI: 10.1109/ICPPW.2014.34