Regionales Rechenzentrum Erlangen (RRZE)

2024

• Alappat C., Thies J., Hager G., Fehske H., Wellein G.:
  Algebraic temporal blocking for sparse iterative solvers on multi-core CPUs
  In: International Journal of High Performance Computing Applications (2024)
  ISSN: 1094-3420
  DOI: 10.1177/10943420241283828
• Laukemann J., Gruber T., Hager G., Oryspayev D., Wellein G.:
  CloverLeaf on Intel Multi-Core CPUs: A Case Study in Write-Allocate Evasion
  38th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2024 (San Francisco, CA, 27. Mai 2024 - 31. Mai 2024)
  In: 2024 IEEE International Parallel and Distributed Processing Symposium (IPDPS) 2024
  DOI: 10.1109/IPDPS57955.2024.00038

2023

• Afzal A., Hager G., Markidis S., Wellein G.:
  Making applications faster by asynchronous execution: Slowing down processes or relaxing MPI collectives
  In: Future Generation Computer Systems-The International Journal of Grid Computing Theory Methods and Applications (2023)
  ISSN: 0167-739X
  DOI: 10.1016/j.future.2023.06.017
• Afzal A., Hager G., Wellein G.:
  Physical Oscillator Model for Supercomputing
  14th IEEE/ACM Workshop on Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS23) (Denver, CO, USA, 12. November 2023 - 17. November 2023)
  In: 14th IEEE/ACM Workshop on Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS23) 2023
  DOI: 10.1145/3624062.3625535
• Afzal A., Hager G., Wellein G.:
  SPEChpc 2021 Benchmarks on Ice Lake and Sapphire Rapids Infiniband Clusters: A Performance and Energy Case Study
  14th IEEE/ACM Workshop on Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS23) (Denver, CO, USA, 12. November 2023 - 17. November 2023)
  In: 14th IEEE/ACM Workshop on Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS23) 2023
  DOI: 10.1145/3624062.3624197
• Afzal A., Hager G., Wellein G., Markidis S.:
  Exploring Techniques for the Analysis of Spontaneous Asynchronicity in MPI-Parallel Applications
  14th International Conference on Parallel Processing and Applied Mathematics, PPAM 2022 (Gdansk, Poland, 11. September 2022 - 14. Juni 2023)
  In: Wyrzykowski, R., Dongarra, J., Deelman, E., Karczewski, K. (Hrsg.): Lecture Notes in Computer Science 2023
  DOI: 10.1007/978-3-031-30442-2_12
• Alvermann A., Hager G., Fehske H.:
  Orthogonal Layers of Parallelism in Large-Scale Eigenvalue Computations
  In: ACM Transactions on Parallel Computing 10 (2023), Art.Nr.: 3614444
  ISSN: 2329-4949
  DOI: 10.1145/3614444
• Ernst D., Holzer M., Hager G., Knorr M., Wellein G.:
  Analytical performance estimation during code generation on modern GPUs
  In: Journal of Parallel and Distributed Computing 173 (2023), S. 152-167
  ISSN: 0743-7315
  DOI: 10.1016/j.jpdc.2022.11.003
• Laukemann J., Hager G.:
  Core-Level Performance Engineering with the Open-Source Architecture Code Analyzer (OSACA) and the Compiler Explorer
  14th Annual ACM/SPEC International Conference on Performance Engineering, ICPE 2023 (Coimbra, 15. April 2023 - 19. April 2023)
  In: ICPE 2023 - Companion of the 2023 ACM/SPEC International Conference on Performance Engineering 2023
  DOI: 10.1145/3578245.3583716
• Ravedutti Lucio Machado R., Eitzinger J., Laukemann J., Hager G., Köstler H., Wellein G.:
  MD-Bench: A performance-focused prototyping harness for state-of-the-art short-range molecular dynamics algorithms
  In: Future Generation Computer Systems-The International Journal of Grid Computing Theory Methods and Applications (2023)
  ISSN: 0167-739X
  DOI: 10.1016/j.future.2023.06.023
• Ravedutti Lucio Machado R., Eitzinger J., Laukemann J., Hager G., Köstler H., Wellein G.:
  MD-Bench: A performance-focused prototyping harness for state-of-the-art short-range molecular dynamics algorithms
  In: Future Generation Computer Systems-The International Journal of Grid Computing Theory Methods and Applications 149 (2023), S. 25-38
  ISSN: 0167-739X
  DOI: 10.1016/j.future.2023.06.023

2022

• Afzal A., Hager G., Wellein G.:
  Addressing White-box Modeling and Simulation Challenges in Parallel Computing
  ACM SIGSIM-PADS '22 (GA, Atlanta, USA, 8. Juni 2022 - 10. Juni 2022)
  In: SIGSIM-PADS '22: SIGSIM Conference on Principles of Advanced Discrete Simulation 2022
  DOI: 10.1145/3518997.3534986
• Afzal A., Hager G., Wellein G.:
  Analytic performance model for parallel overlapping memory-bound kernels
  In: Concurrency and Computation-Practice & Experience (2022)
  ISSN: 1532-0626
  DOI: 10.1002/cpe.6816
  URL: https://onlinelibrary.wiley.com/doi/10.1002/cpe.6816
• Afzal A., Hager G., Wellein G.:
  The Role of Idle Waves, Desynchronization, and Bottleneck Evasion in the Performance of Parallel Programs
  In: IEEE Transactions on Parallel and Distributed Systems (2022), S. 1-16
  ISSN: 1045-9219
  DOI: 10.1109/TPDS.2022.3221085
• Alappat C., Hager G., Schenk O., Wellein G.:
  Level-based Blocking for Sparse Matrices: Sparse Matrix-Power-Vector Multiplication
  In: IEEE Transactions on Parallel and Distributed Systems (2022), S. 1-18
  ISSN: 1045-9219
  DOI: 10.1109/TPDS.2022.3223512

2021

• Afzal A., Hager G., Wellein G.:
  Analytic Modeling of Idle Waves in Parallel Programs: Communication, Cluster Topology, and Noise Impact
  36th International Conference on High Performance Computing, ISC High Performance 2021 (Virtual, Online, 24. Juni 2021 - 2. Juli 2021)
  In: Bradford L. Chamberlain, Bradford L. Chamberlain, Ana-Lucia Varbanescu, Hatem Ltaief, Piotr Luszczek (Hrsg.): Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2021
  DOI: 10.1007/978-3-030-78713-4_19
• Alappat C., 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
• Alappat C., Seiferth J., Hager G., Korch M., Rauber T., Wellein G.:
  YaskSite: Stencil Optimization Techniques Applied to Explicit ODE Methods on Modern Architectures
  19th IEEE/ACM International Symposium on Code Generation and Optimization, CGO 2021 (Virtual, Korea, KOR, 27. Februar 2021 - 3. März 2021)
  In: Jae W. Lee, Mary Lou Soffa, Ayal Zaks (Hrsg.): CGO 2021 - Proceedings of the 2021 IEEE/ACM International Symposium on Code Generation and Optimization 2021
  DOI: 10.1109/CGO51591.2021.9370316
• Ernst D., Hager G., Holzer M., Knorr M., Wellein G.:
  Opening the Black Box: Performance Estimation during Code Generation for GPUs
  IEEE 33rd International Symposium on Computer Architecture and High Performance Computing (Belo Horizonte – Brazil, 26. Oktober 2021 - 28. Oktober 2021)
  DOI: 10.1109/sbac-pad53543.2021.00014

2020

• Afzal A., Hager G., Wellein G.:
  Desynchronization and Wave Pattern Formation in MPI-Parallel and Hybrid Memory-Bound Programs
  35th International Conference on High Performance Computing, ISC High Performance 2020 (Frankfurt, 22. Juni 2020 - 25. Juni 2020)
  In: Ponnuswamy Sadayappan, Bradford L. Chamberlain, Guido Juckeland, Hatem Ltaief (Hrsg.): Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2020
  DOI: 10.1007/978-3-030-50743-5_20
• Alappat C., Basermann A., Bishop AR., Fehske H., Hager G., Schenk O., Thies J., Wellein G.:
  A Recursive Algebraic Coloring Technique for Hardware-efficient Symmetric Sparse Matrix-vector Multiplication
  In: ACM Transactions on Parallel Computing 7 (2020), Art.Nr.: 19
  ISSN: 2329-4949
  DOI: 10.1145/3399732
• Alappat C., Hofmann J., Hager G., Fehske H., Bishop AR., Wellein G.:
  Understanding HPC benchmark performance on intel broadwell and cascade lake processors
  35th International Conference on High Performance Computing, ISC High Performance 2020 (Frankfurt, 22. Juni 2020 - 25. Juni 2020)
  In: Ponnuswamy Sadayappan, Bradford L. Chamberlain, Guido Juckeland, Hatem Ltaief (Hrsg.): Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2020
  DOI: 10.1007/978-3-030-50743-5_21
• Alappat C., 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 (, 12. November 2020)
  In: Proceedings of PMBS 2020: Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems 2020
  DOI: 10.1109/PMBS51919.2020.00006
• Cremonesi F., Hager G., Wellein G., Schuermann F.:
  Analytic performance modeling and analysis of detailed neuron simulations
  In: International Journal of High Performance Computing Applications (2020)
  ISSN: 1094-3420
  DOI: 10.1177/1094342020912528
• Ernst D., Hager G., Thies J., Wellein G.:
  Performance engineering for a tall & skinny matrix multiplication kernels on GPUs
  13th International Conference on Parallel Processing and Applied Mathematics, PPAM 2019 (Bialystok, Poland, 8. September 2019 - 11. September 2019)
  In: Lecture Notes in Computer Science book series (LNCS, volume 12043), Cham: 2020
  DOI: 10.1007/978-3-030-43229-4_43
• Ernst D., Hager G., Thies J., Wellein G.:
  Performance engineering for real and complex tall & skinny matrix multiplication kernels on GPUs
  In: International Journal of High Performance Computing Applications (2020)
  ISSN: 1094-3420
  DOI: 10.1177/1094342020965661
• Hofmann J., Alappat C., Hager G., Fey D., Wellein G.:
  Bridging the architecture gap: Abstracting performance-relevant properties of modern server processors
  In: Supercomputing Frontiers and Innovations 7 (2020), S. 54-78
  ISSN: 2409-6008
  DOI: 10.14529/jsfi200204
• Pieper A., Hager G., Fehske H.:
  A domain-specific language and matrix-free stencil code for investigating electronic properties of Dirac and topological materials
  In: International Journal of High Performance Computing Applications (2020)
  ISSN: 1094-3420
  DOI: 10.1177/1094342020959423
• Thies J., Röhrig-Zöllner M., Overmars N., Basermann A., Ernst D., Hager G., Wellein G.:
  PHIST: A Pipelined, Hybrid-Parallel Iterative Solver Toolkit
  In: Acm Transactions on Mathematical Software 46 (2020), Art.Nr.: 3402227
  ISSN: 0098-3500
  DOI: 10.1145/3402227

2019

• Afzal A., Hager G., Wellein G.:
  Propagation and Decay of Injected One-Off Delays on Clusters: A Case Study
  2019 IEEE International Conference on Cluster Computing, CLUSTER 2019 (Albuquerque, NM, 23. September 2019 - 26. September 2019)
  In: Proceedings - IEEE International Conference on Cluster Computing, ICCC 2019
  DOI: 10.1109/CLUSTER.2019.8890995
• 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), S. 4-25
  ISSN: 2409-6008
  DOI: 10.14529/js?190301
• Laukemann J., Hammer J., Hager G., Wellein G.:
  Automatic Throughput and Critical Path Analysis of x86 and ARM Assembly Kernels
  10th IEEE/ACM Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems, PMBS 2019
  DOI: 10.1109/PMBS49563.2019.00006
• Laukemann J., Hammer J., Hofmann J., Hager G., Wellein G.:
  Automated instruction stream throughput prediction for intel and AMD microarchitectures
  2018 IEEE/ACM Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems, PMBS 2018 (Dallas, TX, 12. November 2018)
  In: Proceedings of PMBS 2018: Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems, Held in conjunction with SC 2018: The International Conference for High Performance Computing, Networking, Storage and Analysis 2019
  DOI: 10.1109/PMBS.2018.8641578

2018

• Hofmann J., Hager G., Fey D.:
  On the Accuracy and Usefulness of Analytic Energy Models for Contemporary Multicore Processors
  High Performance Computing: 33rd International Conference, ISC High Performance 2018 (Frankfurt, 24. Juni 2018 - 28. Juni 2018)
  In: High Performance Computing: 33rd International Conference, ISC High Performance 2018, Cham: 2018
  DOI: 10.1007/978-3-319-92040-5_2
• Hornich J., Hager G., Pflaum C.:
  Efficient optical simulation of nano structures in thin-film solar cells
  DOI: 10.1117/12.2312545
• Kreutzer M., Ernst D., Bishop AR., Fehske H., Hager G., Nakajima K., Wellein G.:
  Chebyshev filter diagonalization on modern manycore processors and GPGPUs
  Springer Verlag, 2018
  ISBN: 9783319920399
  DOI: 10.1007/978-3-319-92040-5_17
• Laukemann J., Hammer J., Hofmann J., Hager G., Wellein G.:
  Automated Instruction Stream Throughput Prediction for Intel and AMD Microarchitectures
  2018 ACM/IEEE Supercomputing Conference (Dallas, TX, 12. November 2018 - 12. November 2018)
  In: 2018 IEEE/ACM Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS) 2018
  DOI: 10.1007/978-3-319-92040-5_2
  URL: https://ieeexplore.ieee.org/document/8641578
• Shahzad F., Thies J., Kreutzer M., Zeiser T., Hager G., Wellein G.:
  CRAFT: A library for easier application-level Checkpoint/Restart and Automatic Fault Tolerance
  In: IEEE Transactions on Parallel and Distributed Systems (2018)
  ISSN: 1045-9219
  DOI: 10.1109/TPDS.2018.2866794
  URL: https://ieeexplore.ieee.org/document/8444763
• Wittmann M., Hager G., Janalik R., Lanser M., Klawonn A., Rheinbach O., Schenk O., Wellein G.:
  Multicore Performance Engineering of Sparse Triangular Solves Using a Modified Roofline Model
  30th International Symposium on Computer Architecture and High Performance Computing (SBAC-PAD) (Lyon, 24. September 2018 - 27. September 2018)
  In: 2018 30TH INTERNATIONAL SYMPOSIUM ON COMPUTER ARCHITECTURE AND HIGH PERFORMANCE COMPUTING (SBAC-PAD 2018), NEW YORK: 2018
  DOI: 10.1109/SBAC-PAD.2018.00047

2017

• Galgon M., Krämer L., Lang B., Alvermann A., Fehske H., Pieper A., Hager G., Kreutzer M., Shahzad F., Wellein G., Basermann A., Röhrig-Zöllner M., Thies J.:
  Improved coefficients for polynomial filtering in ESSEX
  1st InternationalWorkshop on Eigenvalue Problems: Algorithms, Software and Applications in Petascale Computing, EPASA 2015
  DOI: 10.1007/978-3-319-62426-6_5
• Hammer J., Eitzinger J., Hager G., Wellein G.:
  Kerncraft: A Tool for Analytic Performance Modeling of Loop Kernels
  10th International Workshop on Parallel Tools for High Performance Computing (Stuttgart, Germany, 4. Oktober 2016 - 5. Oktober 2016)
  In: Niethammer C, Gracia J, Hilbrich T, Knüpfer A, Resch MM, Nagel WE (Hrsg.): Tools for High Performance Computing 2016, Cham: 2017
• Hofmann J., Fey D., Riedmann M., Eitzinger J., Hager G., Wellein G.:
  Performance analysis of the Kahan-enhanced scalar product on current multi-core and many-core processors
  In: Concurrency and Computation-Practice & Experience 29 (2017)
  ISSN: 1532-0626
  DOI: 10.1002/cpe.3921
• Hofmann J., Hager G., Wellein G., Fey D.:
  An Analysis of Core- and Chip-Level Architectural Features in Four Generations of Intel Server Processors
  32nd International Conference on High Performance Computing: ISC High Performance 2017 (Frankfurt)
  In: High Performance Computing. ISC 2017. Lecture Notes in Computer Science, vol 10266, Cham: 2017
  DOI: 10.1007/978-3-319-58667-0_16
• 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

2016

• Hager G., Eitzinger J., Habich J., Wellein G.:
  Exploring performance and power properties of modern multi-core chips via simple machine models
  In: Concurrency and Computation-Practice & Experience 28 (2016), S. 189-210
  ISSN: 1532-0626
  DOI: 10.1002/cpe.3180
• Hofmann J., Fey D., Eitzinger J., Hager G., Wellein G.:
  Analysis of intel’s haswell microarchitecture using the ECM model and microbenchmarks
  Springer Verlag, 2016
  ISBN: 9783319306940
  DOI: 10.1007/978-3-319-30695-7_16
• Hofmann J., Fey D., Eitzinger J., Hager G., Wellein G.:
  Analysis of Intel's Haswell Microarchitecture Using the ECM Model and Microbenchmarks
  29th International Conference on Architecture of Computing Systems (Nuremberg)
  In: Architecture of Computing Systems -- ARCS 2016: 29th International Conference, Nuremberg, Germany, April 4-7, 2016, Proceedings, Cham: 2016
  DOI: 10.1007/978-3-319-30695-7_16
• Hofmann J., Fey D., Riedman M., Eitzinger J., Hager G., Wellein G.:
  Performance analysis of the Kahan-enhanced scalar product on current multi-corecore and many-core processors
  In: Concurrency and Computation-Practice & Experience 28 (2016)
  ISSN: 1532-0626
  DOI: 10.1002/cpe.3921
• Kreutzer M., Thies J., Röhrig-Zöllner M., Pieper A., Shahzad F., Galgon M., Basermann A., Fehske H., Hager G., Wellein G.:
  GHOST: Building Blocks for High Performance Sparse Linear Algebra on Heterogeneous Systems
  In: International Journal of Parallel Programming (2016), S. 1-27
  ISSN: 0885-7458
  DOI: 10.1007/s10766-016-0464-z
• Thies J., Galgon M., Shahzad F., Alvermann A., Kreutzer M., Pieper A., Röhrig-Zöllner M., Basermann A., Fehske H., Hager G., Lang B., Wellein G.:
  Towards an exascale enabled sparse solver repository
  Springer Verlag, 2016
  ISBN: 9783319405261
  DOI: 10.1007/978-3-319-40528-5_13
• Wellein G., Alvermann A., Fehske H., Hager G., Kreutzer M., Lang B., Pieper A., Galgon M.:
  High-performance implementation of Chebyshev filter diagonalization for interior eigenvalue computations
  In: Journal of Computational Physics 325 (2016), S. 226-243
  ISSN: 0021-9991
  DOI: 10.1016/j.jcp.2016.08.027

2015

• Hammer J., Hager G., Eitzinger J., Wellein G.:
  Automatic loop kernel analysis and performance modeling with kerncraft
  6th International Workshop in Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems, PMBS 2015 - Held as part of the 27th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis, SC 2015
  DOI: 10.1145/2832087.2832092
• Hammer J., Hager G., Eitzinger J., Wellein G.:
  Automatic Loop Kernel Analysis and Performance Modeling With Kerncraft
  SC15 The International Conference for High Performance Computing, Networking, Storage and Analysis (Austin, TX, USA, 15. November 2015)
  In: Proceedings of the 6th International Workshop on Performance Modeling, Benchmarking, and Simulation of High Performance Computing Systems, New York, NY, USA: 2015
  DOI: 10.1145/2832087.2832092
  URL: http://dl.acm.org/citation.cfm?id=2832087&preflayout=flat
• Hofmann J., Fey D., Eitzinger J., Hager G., Wellein G.:
  Performance analysis of the Kahan-enhanced scalar product on current multicore processors
  the 11th International Conference on Parallel Processing and Applied Mathematics (Krakow, Poland)
  In: Accepted for PPAM 2015 2015
  URL: http://arxiv.org/abs/1505.02586
• Kreutzer M., Hager G., Wellein G., Alvermann A., Fehske H., Pieper A.:
  Performance Engineering of the Kernel Polynomal Method on Large-Scale CPU-GPU Systems
  Parallel and Distributed Processing Symposium (IPDPS), 2015 IEEE International (Hyderabad, India, 25. Mai 2015 - 29. Mai 2015)
  In: IEEE (Hrsg.): Proceedings of the 2015 IEEE International Parallel and Distributed Processing Symposium (IPDPS) 2015
  DOI: 10.1109/IPDPS.2015.76
  URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7161530
• Malas T., Hager G., Ltaief H., Stengel H., Wellein G., Keyes D.:
  Multicore-optimized wavefront diamond blocking for optimizing stencil updates
  In: SIAM Journal on Scientific Computing 37 (2015), S. C439-C464
  ISSN: 1064-8275
  DOI: 10.1137/140991133
• Röhrig-Zöllner M., Thies J., Kreutzer M., Alvermann A., Pieper A., Basermann A., Hager G., Wellein G., Fehske H.:
  Increasing the performance of the Jacobi-Davidson method by blocking
  In: SIAM Journal on Scientific Computing DLR Portal ISSN 1064-8275 (2015), S. 1-27
  ISSN: 1064-8275
  DOI: 10.1137/140976017
  URL: http://elib.dlr.de/98373/
• Shahzad F., Kreutzer M., Zeiser T., Machado R., Pieper A., Hager G., Wellein G.:
  Building a Fault Tolerant Application Using the GASPI Communication Layer
  the 1st International Workshop on Fault-Tolerant Systems (Chicago, IL, 8. September 2015 - 11. September 2015)
  In: Proceedings of FTS 2015, in conjunction with IEEE Cluster 2015: 2015
  DOI: 10.1109/CLUSTER.2015.106
• 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
• Wittmann M., Hager G., Zeiser T., Treibig J., Wellein G.:
  Chip-level and multi-node analysis of energy-optimized lattice Boltzmann CFD simulations
  In: Concurrency and Computation-Practice & Experience (2015), S. 1-5
  ISSN: 1532-0626
  DOI: 10.1002/cpe.3489
  URL: http://onlinelibrary.wiley.com/doi/10.1002/cpe.3489/full

2014

• Eitzinger J., Hager G., Wellein G., Stengel H.:
  Quantifying performance bottlenecks of stencil computations using the Execution-Cache-Memory model
  DOI: 10.1145/2751205.2751240
  URL: http://arxiv.org/abs/1410.5010
• Alvermann Andreas, Basermann Achim, Fehske Holger, Galgon Martin, Hager Georg, Kreutzer Moritz, Krämer Lukas, Lang Bruno, Pieper Andreas, Röhrig-Zöllner Melven, Shahzad Faisal, Jonas Thies, Wellein Gerhard:
  ESSEX: Equipping Sparse Solvers for Exascale
  In: Euro-Par 2014: Parallel Processing Workshops, Lecture Notes in Computer Science: SpringerLink, 2014, S. 577-588 (Lecture Notes in Computer Science, Bd.8806)
  ISBN: 9783319143125
  URL: http://link.springer.com/chapter/10.1007/978-3-319-14313-2_49
• Hofmann J., Eitzinger J., Hager G., Wellein G.:
  Comparing the Performance of Different x86 SIMD Instruction Sets for a Medical Imaging Application on Modern Multi- and Manycore Chips
  2014 1st ACM SIGPLAN Workshop on Programming Models for SIMD/Vector Processing, WPMVP 2014 - Co-located with PPoPP 2014 (Orlando, USA, 16. Februar 2014 - 16. Februar 2014)
  In: Proceedings of the 2014 Workshop on Programming models for SIMD/Vector processing, New York, NY, USA: 2014
  DOI: 10.1145/2568058.2568068
  URL: http://dl.acm.org/citation.cfm?doid=2568058.2568068
• Hofmann J., Eitzinger J., Hager G., Wellein G.:
  Performance Engineering for a Medical Imaging Application on the Intel Xeon Phi Accelerator
  In: ARCS Workshops'14 2014
  URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6775080&isnumber=6775071
• Kreutzer M., Hager G., Wellein G., Fehske H., Bishop AR.:
  A unified sparse matrix data format for efficient general sparse matrix-vector multiplication on modern processors with wide SIMD units
  In: SIAM Journal on Scientific Computing 36 (2014), S. C401–C423
  ISSN: 1064-8275
  DOI: 10.1137/130930352
  URL: http://epubs.siam.org/doi/abs/10.1137/130930352
• Wittmann M., Zeiser T., Hager G., Wellein G.:
  Modeling and analyzing performance for highly optimized propagation steps of the lattice Boltzmann method on sparse lattices
  (2014)
  Open Access: http://arxiv.org/abs/1410.0412
  URL: https://arxiv.org/abs/1410.0412
  (Techreport)

2013

• Eitzinger J., Hager G., Hofmann H., Hornegger J., Wellein G.:
  Pushing the limits for medical image reconstruction on recent standard multicore processors
  In: International Journal of High Performance Computing Applications 27 (2013), S. 162-177
  ISSN: 1094-3420
  DOI: 10.1177/1094342012442424
• Scharpff T., Iglberger K., Hager G., Rüde U.:
  Model-guided Performance Analysis of the Sparse Matrix-Matrix Multiplication
  International Conference on High Performance Computing & Simulation (HPCS 2013) (Helsinki, Finnland, 1. Juli 2013 - 5. Juli 2013)
  In: HPCS2013 Conference Proceedings (Preprint bei arXiv) 2013
  DOI: 10.1109/HPCSim.2013.6641452
  URL: http://arxiv.org/abs/1303.1651
• Shahzad F., Wittmann M., Kreutzer M., Zeiser T., Hager G., Wellein G.:
  A survey of checkpoint/restart techniques on distributed memory systems
  In: Parallel Processing Letters 23 (2013), S. 1340011-1340030
  ISSN: 0129-6264
  DOI: 10.1142/S0129626413400112
  URL: http://www.worldscientific.com/doi/abs/10.1142/S0129626413400112
• Shahzad F., Wittmann M., Kreutzer M., Zeiser T., Hager G., Wellein G.:
  PGAS implementation of SpMVM and LBM with GPI
  The 7th International Conference on PGAS Programming Models (Edinburgh, Scotland, UK)
  In: Proceedings of the 7th International Conference on PGAS Programming Models, Edinburgh: 2013
• Shahzad F., Wittmann M., Zeiser T., Hager G., Wellein G.:
  An Evaluation of Different I/O Techniques for Checkpoint/Restart
  2013 IEEE 27th International Parallel and Distributed Processing Symposium Workshops & PhD Forum (Boston, MA, USA, 20. Mai 2013 - 24. Mai 2013)
  In: Parallel and Distributed Processing Symposium Workshops PhD Forum (IPDPSW), 2013 IEEE 27th International, n.a.: 2013
  DOI: 10.1109/IPDPSW.2013.145
• Wittmann M., Hager G., Wellein G., Zeiser T., Krammer B.:
  MPC and CoArray Fortran: Alternatives to classic MPI implementations on the examples of scalable lattice boltzmann flow solvers
  15th Results and Review Workshop on High Performance Computing in Science and Engineering, HLRS 2012 (Stuttgart)
  DOI: 10.1007/978-3-642-33374-3_27
• Wittmann M., Zeiser T., Hager G., Wellein G.:
  Comparison of Different Propagation Steps for Lattice Boltzmann Methods
  In: Computers & Mathematics with Applications 65 (2013), S. 924-935
  ISSN: 0898-1221
  DOI: 10.1016/j.camwa.2012.05.002
  URL: http://www.sciencedirect.com/science/article/pii/S0898122112003835

2012

• Eitzinger J., Hager G., Wellein G.:
  Performance Patterns and Hardware Metrics on Modern Multicore Processors: Best Practices for Performance Engineering
  5th Workshop on Productivity and Performance (PROPER 2012) (Rhodes Island, Greece)
  In: Euro-Par 2012, -: 2012
  URL: http://arxiv.org/abs/1206.3738
• Habich J., Feichtinger C., Köstler H., Hager G., Wellein G.:
  Performance Engineering for the Lattice Boltzmann Method on GPGPUs: Architectural Requirements and Performance Results
  In: Computers & Fluids (2012), S. 10
  ISSN: 0045-7930
  DOI: 10.1016/j.compfluid.2012.02.013.
  URL: http://www.sciencedirect.com/science/article/pii/S0045793012000679
• Hager G., Eitzinger J., Wellein G., Habich J.:
  Exploring performance and power properties of modern multicore chips via simple machine models
  In: Concurrency and Computation-Practice & Experience Submitted (2012), S. 22
  ISSN: 1532-0626
  URL: http://arxiv.org/abs/1208.2908
• Iglberger K., Hager G., Eitzinger J., Rüde U.:
  High performance smart expression template math libraries
  High Performance Computing and Simulation (HPCS) 2012 (Madrid, 2. Juli 2012 - 6. Juli 2012)
  In: High Performance Computing and Simulation (HPCS) 2012, International Conference on 2012
  DOI: 10.1109/HPCSim.2012.6266939
  URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=06266939
• Sembritzki K., Hager G., Krammer B., Eitzinger J., Wellein G.:
  Evaluation of the Coarray Fortran Programming Model on the Example of a Lattice Boltzmann Code
  The 6th Conference on Partitioned Global Address Space Programming Models (Santa Barbara, CA, USA)
  In: PGAS12, In Press: 2012
• Wittmann M., Zeiser T., Hager G., Wellein G.:
  Domain Decomposition and Locality Optimization for Large-Scale Lattice Boltzmann Simulations
  In: Computers & Fluids (2012)
  ISSN: 0045-7930
  DOI: 10.1016/j.compfluid.2012.02.007
  URL: http://www.sciencedirect.com/science/article/pii/S0045793012000527

2011

• Eitzinger J., Wellein G., Hager G.:
  Efficient multicore-aware parallelization strategies for iterative stencil computations
  In: Journal of Computational Science 2 (2011), S. 130–137
  ISSN: 1877-7503
  DOI: 10.1016/j.jocs.2011.01.010
  URL: http://www.sciencedirect.com/science/article/pii/S1877750311000172
• Feichtinger C., Köstler H., Hager G., Rüde U., Wellein G., Habich J.:
  A flexible Patch-based lattice Boltzmann parallelization approach for heterogeneous GPU-CPU clusters
  In: Parallel Computing 37 (2011), S. 536-549
  ISSN: 0167-8191
  DOI: 10.1016/j.parco.2011.03.005
  URL: http://www.sciencedirect.com/science/article/pii/S0167819111000342
• Habich J., Zeiser T., Hager G., Wellein G.:
  Performance analysis and optimization strategies for a D3Q19 lattice Boltzmann kernel on nVIDIA GPUs using CUDA
  PARENG 2009
  In: Advances in Engineering Software, ScienceDirect: 2011
  DOI: 10.1016/j.advengsoft.2010.10.007
  URL: http://www.sciencedirect.com/science/article/pii/S0965997810001274
• Hager G., Wellein G., Schubert G., Fehske H.:
  Hybrid-parallel sparse matrix-vector multiplication with explicit communication overlap on current multicore-based systems.
  In: Parallel Processing Letters 21 (2011), S. 339-358
  ISSN: 0129-6264
  DOI: 10.1142/S0129626411000254
• Iglberger K., Hager G., Eitzinger J., Rüde U.:
  Expression Templates Revisited: A Performance Analysis of the Current ET Methodology
  In: SIAM Journal on Scientific Computing (2011), S. 1-15
  ISSN: 1064-8275
  URL: http://arxiv.org/abs/1104.1729
• Schubert G., Hager G., Fehske H., Wellein G.:
  Parallel sparse matrix-vector multiplication as a test case for hybrid MPI OpenMP programming
  25th IEEE International Parallel and Distributed Processing Symposium, Workshops and Phd Forum, IPDPSW 2011 (Anchorage, AK)
  DOI: 10.1109/IPDPS.2011.332

2010

• Eitzinger J., Hager G.:
  Introducing a Performance Model for Bandwidth-Limited Loop Kernels
  8th International Conference, PPAM 2009 , Revised Selected Papers, Part I (Wroclaw, Poland, 13. September 2009 - 16. September 2009)
  In: Parallel Processing and Applied Mathematics, Berlin Heidelberg: 2010
  DOI: 10.1007/978-3-642-14390-8_64
  URL: http://www.springerlink.com/content/m720118145140122/
• Eitzinger J., Hager G., Wellein G.:
  Complexities of Performance Prediction for Bandwidth-Limited Loop Kernels on Multi-Core Architectures
  Transactions of the Fourth Joint HLRB and KONWIHR Review and Results Workshop (Leibniz Supercomputing Centre, Garching/Munich, Germany)
  In: High Performance Computing in Science and Engineering, Garching/Munich 2009, Berlin Heidelberg: 2010
  DOI: 10.1007/978-3-642-13872-0_1
  URL: http://www.springerlink.com/content/m1288m0174021600/
• Eitzinger J., Hager G., Wellein G.:
  LIKWID: A Lightweight Performance-Oriented Tool Suite for x86 Multicore Environments
  39th International Conference on Parallel Processing Workshops (San Diego, CA, USA, 13. September 2010 - 16. September 2010)
  In: Proceedings of PSTI2010, the First International Workshop on Parallel Software Tools and Tool Infrastructures, IEEE: 2010
  DOI: 10.1109/ICPPW.2010.38
  URL: http://arxiv.org/abs/1004.4431
• Eitzinger J., Hager G., Wellein G., Meier M.:
  LIKWID performance tools
  URL: http://inside.hlrs.de/pdfs/inSiDE_spring2010.pdf
• Feichtinger C., Habich J., Köstler H., Hager G., Rüde U., Wellein G.:
  A Flexible Patch-Based Lattice Boltzmann Parallelization Approach for Heterogeneous GPU-CPU Clusters
  (2010), S. 18
  URL: https://www10.cs.fau.de/publications/reports/TechRep_2010-07.pdf
  (Techreport)
• Wittmann M., Hager G., Eitzinger J., Wellein G.:
  Leveraging shared caches for parallel temporal blocking of stencil codes on multicore processors and clusters
  In: Parallel Processing Letters 20 (2010), S. 359-376
  ISSN: 0129-6264
  DOI: 10.1142/S0129626410000296
  URL: http://arxiv.org/abs/1006.3148

2009

• Habich J., Zeiser T., Hager G., Wellein G.:
  Speeding up a Lattice Boltzmann Kernel on nVIDIA GPUs
  PARENG2009 (Pécs, Hungary, 6. April 2009 - 8. April 2009)
  In: Proceedings of the First International Conference on Parallel, Distributed and Grid Computing for Engineering, Kippen, Stirlingshire, United Kingdom: 2009
• Hager G., Stengel H., Zeiser T., Wellein G.:
  RZBENCH: performance evaluation of current HPC architectures using low-level and application benchmarks
  In: High Performance Computing in Science and Engineering, Garching/Munich 2007: Transactions of the Third Joint HLRB and KONWIHR Status and Result Workshop, Dec. 3-4, 2007, Leibniz Supercomputing Centre, Garching/Munich, Germany, Berlin, Heidelberg: Springer, 2009, S. 485-501 (Mathematics and Statistics, Bd.V)
  ISBN: 978-3-540-69181-5
  DOI: 10.1007/978-3-540-69182-2_39
• Schindzielorz N., Erler J., Klüpfel P., Reinhard PG., Hager G.:
  Fission of super-heavy nuclei explored with skyrme forces
  In: International Journal of Modern Physics E-Nuclear Physics 18 (2009), S. 773-781
  ISSN: 0218-3013
  DOI: 10.1142/S0218301309012860
• Stürmer M., Wellein G., Hager G., Köstler H., Rüde U.:
  Challenges and Potentials of Emerging Multicore Architectures
  Third Joint HLRB and KONWIHR Status and Result Workshop (Garching, 3. Dezember 2007 - 4. Dezember 2007)
  In: High Performance Computing in Science and Engineering Garching-Munich 2007, Berlin Heidelberg: 2009
  URL: http://www.springer.com/math/cse/book/978-3-540-69181-5
• Wellein G., Hager G., Zeiser T., Wittmann M., Fehske H.:
  Efficient temporal blocking for stencil computations by multicore-aware wavefront parallelization
  COMPSAC 2009 (Seattle, USA, 20. Juli 2009 - 24. Juli 2009)
  In: Proceedings of 2009 33rd Annual IEEE International Computer Software and Applications Conference, IEEE Computer Society: 2009
  DOI: 10.1109/COMPSAC.2009.82
• Zeiser T., Hager G., Wellein G.:
  Benchmark analysis and application results for lattice Boltzmann simulations on NEC SX vector and Intel Nehalem systems
  In: Parallel Processing Letters 19 (2009), S. 491-511
  ISSN: 0129-6264
  DOI: 10.1142/S0129626409000389
  URL: http://www.worldscinet.com/ppl/19/1904/S0129626409000389.html
• Zeiser T., Hager G., Wellein G.:
  The world's fastest CPU and SMP node: Some performance results from the NEC SX-9
  23rd IEEE International Parallel and Distributed Processing Symposium (IPDPS) (Roma, 23. Mai 2009 - 29. Mai 2009)
  In: Proceedings of the IEEE International Symposium on Parallel&Distributed Processing 2009, IEEE Computer Society: 2009
  DOI: 10.1109/IPDPS.2009.5161089
• Zeiser T., Hager G., Wellein G.:
  Vector Computers in a World of Commodity Clusters, Massively Parallel Systems and Many-Core Many-Threaded CPUs: Recent Experience Based on an Advanced Lattice Boltzmann Flow Solver
  In: High Performance Computing in Science and Engineering '08: Transactions of the High Performance Computing Center, Stuttgart (HLRS) 2008, Berlin Heidelberg: Springer, 2009, S. 333-347 (Mathematics and Statistics, Bd.5)
  ISBN: 978-3-540-88301-2
  DOI: 10.1007/978-3-540-88303-6_24
• Zeiser T., Hager G., Wellein G., Inayat A., Schwieger W., Heidig T., Freund H.:
  Selecting an Appropriate Computational Platform for Supporting the Development of New Catalyst Carriers
  In: Innovatives Supercomputing in Deutschland : inSiDE 7 Spring (2009), S. 12-16
  URL: http://inside.hlrs.de/htm/Edition_01_09/article_05.html

2008

• Breuer M., Zeiser T., Hager G., Wellein G., Lammers P.:
  Direct numerical simulation of turbulent flow over dimples - Code optimization for NEC SX-8 plus flow results
  In: High Performance Computing in Science and Engineering '07: Transactions of the High Performance Computing Center, Stuttgart (HLRS) 2007, Berlin/Heidelberg: Springer, 2008, S. 303-318
  ISBN: 9783540747383
  DOI: 10.1007/978-3-540-74739-0_21
  URL: http://link.springer.com/chapter/10.1007%2F978-3-540-74739-0_21
• Hager G., Zeiser T., Wellein G.:
  Data access characteristics and optimizations for SUN ULTRASPARC T2 AND T2+ systems
  In: Parallel Processing Letters 18 (2008), S. 471-490
  ISSN: 0129-6264
  DOI: 10.1142/S0129626408003521
• Hager G., Zeiser T., Wellein G.:
  Data access optimizations for highly threaded multi-core CPUs with multiple memory controllers
  IEEE International Symposium on Parallel and Distributed Processing, 2008. IPDPS 2008 (Miami, FL, USA, 14. April 2008 - 18. April 2008)
  In: Proceedings of the 2008 IEEE International Parallel & Distributed Processing Symposium, IEEE Catalog Number: 2008
  DOI: 10.1109/IPDPS.2008.4536341
• Wellein G., Hager G., Rüde U.:
  What's next? Evaluating Performance and Programming Approaches for Emerging Computer Technologies
  (2008), S. 42-45
  URL: http://www.rrze.uni-erlangen.de/wir-ueber-uns/publikationen/HPC-2008-Screenversion.pdf
  (Techreport)
• Zeiser T., Wellein G., Iglberger K., Rüde U., Hager G., Nitsure A.:
  Introducing a parallel cache oblivious blocking approach for the lattice Boltzmann method
  In: Progress in Computational Fluid Dynamics 8 (2008), S. 179-188
  ISSN: 1468-4349
  DOI: 10.1504/PCFD.2008.018088

2006

• Hager G., Zeiser T., Eitzinger J., Wellein G.:
  Optimizing performance on modern HPC systems: learning from simple kernel benchmarks
  The 2nd Russian-German Advanced Research Workshop (Stuttgart, Germany)
  In: Computational Science and High Performance Computing II, Berlin Heidelberg: 2006
  DOI: 10.1007/3-540-31768-6_23
  URL: http://www.springerlink.com/content/8401n54088177483/
• Iglberger K., Rüde U., Feichtinger C., Wellein G., Hager G., Nitsure A.:
  Optimization of Cache Oblivious Lattice Boltzmann Method in 2D and 3D
  ASIM 2006 - 19. Symposium Simulationstechnik (Hannover)
  In: Simulationstechnique - 19th Symposium in Hannover, September 2006, Erlangen: 2006
  URL: https://www10.informatik.uni-erlangen.de/Publications/Papers/2006/Nitsure_ASIM06.pdf
• Lammers P., Wellein G., Zeiser T., Hager G., Breuer M.:
  Have the Vectors the Continuing Ability to Parry the Attack of the Killer Micros?
  In: High Performance Computing on Vector Systems: Proceedings of the High Performance Computing Center Stuttgart, March 2005, Berlin Heidelberg: Springer, 2006, S. 25-37 (Mathematics and Statistics, Bd.1)
  ISBN: 978-3-540-29124-4
  DOI: 10.1007/3-540-35074-8_2
• Wellein G., Lammers P., Hager G., Donath S., Zeiser T.:
  Towards optimal performance for lattice Boltzmann applications on terascale computers
  In: Parallel Computational Fluid Dynamics: Theory and Applications, Proceedings of the 2005 International Conference on Parallel Computational Fluid Dynamics, -: 2006
  DOI: 10.1016/B978-044452206-1/50005-7
• Wellein G., Zeiser T., Hager G., Donath S.:
  On the single processor performance of simple lattice Boltzmann kernels
  In: Computers & Fluids 35 (2006), S. 910-919
  ISSN: 0045-7930
  DOI: 10.1016/j.compfluid.2005.02.008

2005

• Deserno F., Hager G., Brechtefeld F., Wellein G.:
  Performance of Scientific Applications on Modern Supercomputers
  High Performance Computing in Science and Engineering (München)
  In: High Performance Computing in Science and Engineering Munich 2004 Transactions of the Second Joint HLRB and KONWIHR Status and ResultWorkshop, March 2-3, 2004, Technical University of Munich, andLeibniz-Rechenzentrum Munich, Germany., Berlin Heidelberg: 2005
  URL: http://link.springer.com/chapter/10.1007/3-540-26657-7_1#page-1
• Donath S., Zeiser T., Hager G., Habich J., Wellein G.:
  Optimizing performance of the lattice Boltzmann method for complex structures on cache-based architectures
  In: Frontiers in Simulation: Simulationstechnique, 18th Symposium in Erlangen, September 2005 (ASIM), Erlangen: 2005
  URL: http://www.rrze.uni-erlangen.de/dienste/arbeiten-rechnen/hpc/Projekte/Donath_ASIM05.pdf
• Hager G., Bergen B., Lammers P., Wellein G.:
  Taming the Bandwidth Behemoth. First Experiences on a Large SGI Altix System
  In: Innovatives Supercomputing in Deutschland : inSiDE 3 (2005), S. 24
• Hager G., Zeiser T., Heller H.:
  cxHPC: Setting up ByGRID — First Steps Towards an e-Science Infrastructure in Bavaria
  In: High Performance Computing in Science and Engineering, Garching 2004: Transactions of the KONWIHR Result Workshop, October 14–15, 2004, Technical University of Munich, Garching, Germany, Berlin Heidelberg: Springer, 2005, S. 97-102 (Mathematics and Statistics, Bd.II)
  ISBN: 978-3-540-26145-2
  DOI: 10.1007/3-540-28555-5_9

2004

• Hager G., Zeiser T., Heller H.:
  cxHPC: Setting up ByGRID --- First Steps Towards an e-Science Infrastructure in Bavaria
  In: High Performance Computing in Science and Engineering, Garching 2004, Berlin, Heidelberg: 2004

2003

• Hager G., Deserno F., Wellein G.:
  Pseudo-Vectorization and RISC Optimization Techniques for the Hitachi SR8000 Architecture
  High Performance Computing in Science and Engineering (München, 10. Oktober 2002 - 11. Oktober 2002)
  In: High Performance Computing in Science and Engineering, Munich 2002: Transactions of the First Joint HLRB and KONWIHR Status and Result Workshop, October 10-11, Technical University of Munich, Germany., New York, LLC: 2003

• Christie Alappat, Jan Laukemann, Thomas Gruber, Georg Hager, Gerhard Wellein: Best Short Paper Award (PMBS 2020) (PMBS@SC20) – 2020
• Jan Laukemann, Julian Hammer, Georg Hager, Gerhard Wellein: Best Late-Breaking Paper Award (PMBS 2019) (PMBS@SC19) – 2019
• Dominik Ernst, Georg Hager, Jonas Thies, Gerhard Wellein: Best Workshop Paper Award (PPAM 2019) (PPAM) – 2019
• Johannes Hofmann, Georg Hager, Dietmar Fey: Gauss Award (Gauss Centre for Supercomputing (GCS)) – 2018