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DTSTART;TZID=Europe/Paris:20250827T162000
DTEND;TZID=Europe/Paris:20250827T164000
DTSTAMP:20260415T015321
CREATED:20250826T092550Z
LAST-MODIFIED:20250826T092550Z
UID:1706-1756311600-1756312800@ceec-coe.eu
SUMMARY:FLEXI: Scale-resolving simulations of compressible turbulence on modern HPC systems
DESCRIPTION:Join our own Anna Schwarz for the WHPC Europa invited session discussing our latest work preparing FLEXI for exascale and GPU-based systems. \nAbstract\nThe application of scale-resolving simulations such as LES and DNS remains challenging in numerous engineering applications due to the substantial computational demands and the limited available computational resources. It was thoroughly demonstrated in the last decade that high-order numerical methods show significant advantages in terms of computational cost required to achieve a given accuracy for DNS and LES and that they can be implemented efficiently on traditional CPU-based system architectures. However\, the improvements in performance for CPU-based systems has slowed down significantly over the last years. Consequently\, more specialised architectures\, such as GPUs\, have become increasingly popular in the last decade. These architectures still promise considerable performance improvements per generation and thus allow more complex flow cases to be tackled\, while also yielding better performance per invested amount of energy. However\, CPU codes cannot be easily run on GPU hardware\, since they exhibit a distinctly different architecture and require different programming languages. In this talk it is demonstrated how existing codebases can be translated efficiently to GPU hardware\, both in terms of implementation effort and computational performance. For this\, the unstructured DG code FLEXI~\cite{Krais2019\,Kempf2024} is utilized as an example. Finally\, it is shown that FLEXI is capable of tackling challenging large-scale problems with complex geometries on modern HPC systems.
URL:https://ceec-coe.eu/event/flexi-scale-resolving-simulations-of-compressible-turbulence-on-modern-hpc-systems/
LOCATION:TUD Dresden University of Technology   Barkhausen-Bau (BAR)\, Georg-Schumann-Str. 13  \, Dresden\, 01069\, Germany
CATEGORIES:Conference,InvitedSession
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250827T164000
DTEND;TZID=Europe/Paris:20250827T170000
DTSTAMP:20260415T015321
CREATED:20250826T091453Z
LAST-MODIFIED:20250826T091453Z
UID:1702-1756312800-1756314000@ceec-coe.eu
SUMMARY:Exploring Flow Fields at Scale: GPU-Accelerated Scientific Visualization for Exascale CFD
DESCRIPTION:Join our own Susanne Malheiros at the WHPC Europa Invited Session to hear about our latest work on Vistle. \nAbstract:\nThis talk presents the ongoing efforts to port Vistle – a software for creating immersive extended reality visualizations of scientific data – to the GPU by integrating the portable visualization toolkit Viskores. The approach is illustrated by sample computational fluid dynamics (CFD) visualizations of the light-house cases from the Center of Excellence in Exascale CFD (CEEC) project.
URL:https://ceec-coe.eu/event/exploring-flow-fields-at-scale-gpu-accelerated-scientific-visualization-for-exascale-cfd/
LOCATION:TUD Dresden University of Technology   Barkhausen-Bau (BAR)\, Georg-Schumann-Str. 13  \, Dresden\, 01069\, Germany
CATEGORIES:Conference,InvitedSession
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250917T150000
DTEND;TZID=Europe/Paris:20250917T160000
DTSTAMP:20260415T015321
CREATED:20250616T143450Z
LAST-MODIFIED:20250917T102232Z
UID:1589-1758121200-1758124800@ceec-coe.eu
SUMMARY:Introduction to the DLB Library and Measuring GPU performance
DESCRIPTION:The Dynamic Load Balancing library is a runtime library that offers different capabilities to HPC users. It consists of three different modules that work collaboratively and independently: \n\nLend When Idle (LeWI): Offers a transparent load balancing mechanism for hybrid applications (MPI + OpenMP)\nTracking Application Life Performance (TALP): Collects performance metrics at runtime\, offering a transparent and lightweight tool to measure the parallel and computational efficiency of your code. Metrics can be collected during runtime\, offering the possibility of dynamic adaptation.\nDynamic Resource Ownership Management: Provides a mechanism to change the amount of computational resources used by the different processes at runtime without stopping the application.\n\nIn this webinar we’ll provide an overview of the DLB library and each one of its modules. For each module we’ll share its main features\, how to use it\, and some success stories. We’ll put special focus on the TALP module and its recent extension to provide GPU metrics when getting performance measurements.
URL:https://ceec-coe.eu/event/introduction-to-the-dlb-library-and-measuring-gpu-performance/
LOCATION:Online
CATEGORIES:Webinar
ATTACH;FMTTYPE=image/png:https://ceec-coe.eu/wp-content/uploads/2025/06/DLB2PosterDraft_V2-e1750084415957.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20251009T121000
DTEND;TZID=Europe/Paris:20251009T143000
DTSTAMP:20260415T015321
CREATED:20251008T140057Z
LAST-MODIFIED:20251008T140057Z
UID:1833-1760011800-1760020200@ceec-coe.eu
SUMMARY:Mixed-Precision and Energy-Efficient Computations
DESCRIPTION:If you’re at the Workshop on Approximate Computing in Numerical Linear Algebra in Paris this week\, don’t miss Yanxiang Chen’s  lunch poster talk on mixed precision and energy efficient computations! \nAbstract: High Performance Computing has traditionally focused on optimizing between memory usage\, arithmetic intensity\, parallelism\, and communication costs. However\, as simulations grow\, energy consumption has surged\, presenting significant sustainability challenges for large-scale computing infrastructures. Addressing these challenges requires innovative strategies that enhance energy efficiency without compromising computational accuracy or performance.\nWe present a systematic methodology for reducing the energy footprint of large-scale simulations via mixed-precision computing\, without compromising accuracy or performance. Our approach combines performance profiling with numerical sensitivity analysis to identify precision-insensitive code regions\, select promising candidates\, and gradually convert them to lower precision. Applied to representative high-performance computing kernels\, this strategy yields up to 40% speedup and 47% energy savings in an implicit Poisson solver\, and roughly 30% gains in both execution time and energy consumption in explicit solvers\, all while preserving double-precision level accuracy. These results demonstrate that our methodology provides a versatile and effective lever for enhancing the sustainability of HPC applications.
URL:https://ceec-coe.eu/event/mixed-precision-and-energy-efficient-computations-2/
CATEGORIES:Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20251009T155000
DTEND;TZID=Europe/Paris:20251009T161000
DTSTAMP:20260415T015321
CREATED:20251008T135146Z
LAST-MODIFIED:20251008T135146Z
UID:1831-1760025000-1760026200@ceec-coe.eu
SUMMARY:Mixed-Precision Strategies in Spectral Element Codes: Accuracy-Aware Approximation for Energy-Efficient Simulations
DESCRIPTION:If you’re at the Workshop on Approximate Computing in Numerical Linear Algebra in Paris this week\, chec out Roman Iakymchuk’s talk on mixed-precision strategies in spectral element codes on Thursday! \nAbstract: Approximate computing via mixed precision arithmetic offers a promising path to energy-efficient high-performance computing. However\, identifying where and how to apply reduced precision without compromising solution accuracy remains a key challenge in scientific simulations. In this talk\, we present a comprehensive methodology for enabling mixed-precision in spectral element codes using floating-point analysis tools\, roofline modeling\, and empirical verification. We apply our strategy to Nekbone and Neko—two fluid dynamics solvers—by combining reduced-precision iterative solvers with double-precision critical operations such as dot products and global communications. Our method is supported by Verificarlo’s Monte Carlo arithmetic and precision emulation\, which help detect numerically stable kernels for approximation. The resulting mixed-precision versions deliver up to 2.38x faster time-to-solution and 2.8× lower energy-to-solution\, while retaining double-precision-level accuracy. This work highlights a practical\, accuracy-aware approach to integrating approximation into large-scale legacy applications\, making them fit for future exascale platforms.
URL:https://ceec-coe.eu/event/mixed-precision-strategies-in-spectral-element-codes-accuracy-aware-approximation-for-energy-efficient-simulations/
CATEGORIES:Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20251022T140000
DTEND;TZID=Europe/Paris:20251022T150000
DTSTAMP:20260415T015321
CREATED:20251006T093146Z
LAST-MODIFIED:20251021T140651Z
UID:1766-1761141600-1761145200@ceec-coe.eu
SUMMARY:Extreme-Scale High-Fidelity Computational Fluid Dynamics with Neko
DESCRIPTION:Neko is a portable framework for high-order spectral element-based simulations\, mainly focusing on incompressible/compressible flow. The framework is written in a modern object-oriented approach and supports various hardware backends\, ranging across general-purpose processors\, accelerators\, and vector processors. Neko has demonstrated excellent performance and scalability across various hardware architectures and was nominated as a finalist for the ACM Gordon Bell prize in 2023. \nIn this webinar\, we will provide an introduction to Neko and its capabilities\, from installation to creating and running simulations. Special focus will also be on the major changes in terms of features and functionalities\, user interaction\, and improvements made in the upcoming release of Neko v1.0. By the end of the webinar\, attendees will have a basis as well as references and materials to start working with Neko on their own time.
URL:https://ceec-coe.eu/event/extreme-scale-high-fidelity-computational-fluid-dynamics-with-neko/
LOCATION:Online
ATTACH;FMTTYPE=image/png:https://ceec-coe.eu/wp-content/uploads/2025/10/NekoPoster-e1759755285466.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20251126T140000
DTEND;TZID=Europe/Paris:20251126T150000
DTSTAMP:20260415T015321
CREATED:20251020T090851Z
LAST-MODIFIED:20251125T081129Z
UID:1844-1764165600-1764169200@ceec-coe.eu
SUMMARY:Exploring CI/CD Tools and Workflows for Research and HPC Software Projects
DESCRIPTION:Continuous Integration and Continuous Deployment (CI/CD) are essential for sustainable and reproducible software development\, yet many projects still lack a structured workflow.\nThis webinar provides a beginner-friendly introduction to CI/CD with a focus on EuroHPC. We will explore why CI/CD matters\, review a selection of tools commonly used or even developed within European projects\, and discuss their strengths\, limitations\, and typical use cases.\nThe goal is to help developers new to CI/CD understand available options and how to choose tools that fit their needs. A short example from the waLBerla project will illustrate how such workflows can be applied in practice.
URL:https://ceec-coe.eu/event/exploring-ci-cd-tools-and-workflows-for-research-and-hpc-software-projects/
LOCATION:Online
CATEGORIES:Webinar
ATTACH;FMTTYPE=image/png:https://ceec-coe.eu/wp-content/uploads/2025/10/CI-CDPoster-e1761921989737.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20251209T140000
DTEND;TZID=Europe/Paris:20251209T150000
DTSTAMP:20260415T015321
CREATED:20251020T095113Z
LAST-MODIFIED:20251209T100854Z
UID:1848-1765288800-1765292400@ceec-coe.eu
SUMMARY:Performance Portability for Fortran CFD Software with GALÆXI
DESCRIPTION:With GPU acceleration now ubiquitous in HPC\, there is more pressure than ever to port existing simulation software to leverage the new hardware. There are many GPU programming models available\, but they often have limited\, or completely lack\, support for Fortran. This leads owners of existing Fortran scientific codes to struggle with porting their software to multiple computing architectures. One option is to turn to C++ to achieve the greatest performance portability.\nThis webinar is a guide for the process of taking a Fortran CFD code and porting it to GPUs using CUDA/HIP C++. The basics of GPU hardware and programming will be covered\, to serve as a rough guide for adapting algorithms and data structures. The high-order discontinuous Galerkin spectral element CFD code GALÆXI is then presented. The important design questions and porting requirements in GALÆXI are discussed\, which researchers must answer and understand to effectively port their own Fortran codes with CUDA/HIP C++.
URL:https://ceec-coe.eu/event/performance-portability-for-fortran-cfd-software-with-galaexi/
LOCATION:Online
CATEGORIES:Webinar
ATTACH;FMTTYPE=image/png:https://ceec-coe.eu/wp-content/uploads/2025/11/FLEXI2025Poster-e1764062226596.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260128T113000
DTEND;TZID=Europe/Paris:20260128T120000
DTSTAMP:20260415T015321
CREATED:20260126T125309Z
LAST-MODIFIED:20260126T125309Z
UID:1976-1769599800-1769601600@ceec-coe.eu
SUMMARY:Task-decomposed Overlapped Preconditioner for Sustained Strong Scalability on Accelerated Exascale Systems
DESCRIPTION:Join Niclas Jannson in Osaka\, Japan at SCA/HPCAsia2026 for his talk on “Task-decomposed Overlapped Preconditioner for Sustained Strong Scalability on Accelerated Exascale Systems.”
URL:https://ceec-coe.eu/event/task-decomposed-overlapped-preconditioner-for-sustained-strong-scalability-on-accelerated-exascale-systems/
CATEGORIES:Conference,Paper Talk
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260128T120000
DTEND;TZID=Europe/Paris:20260128T123000
DTSTAMP:20260415T015321
CREATED:20260126T131141Z
LAST-MODIFIED:20260126T131312Z
UID:1978-1769601600-1769603400@ceec-coe.eu
SUMMARY:A Matrix-Free Algebraic hp-Multigrid Method for Computational Fluid Dynamics Applications
DESCRIPTION:After the talk on preconditioners in Osaka\, Japan at SCA/HPCAsia2026 \, stick with Niclas Jannson for his next talk on “A Matrix-Free Algebraic hp-Multigrid Method for Computational Fluid Dynamics Application.\, a best paper finalist. “
URL:https://ceec-coe.eu/event/a-matrix-free-algebraic-hp-multigrid-method-for-computational-fluid-dynamics-applications/
CATEGORIES:Conference,Paper Talk
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260302T164500
DTEND;TZID=Europe/Paris:20260302T183000
DTSTAMP:20260415T015321
CREATED:20260223T095144Z
LAST-MODIFIED:20260223T095144Z
UID:1993-1772469900-1772476200@ceec-coe.eu
SUMMARY:CEEC at the 1st Stuttgart Research Software Day
DESCRIPTION:What is research software and why does it matter? These questions are the point of the first ever Research Software Day at the University of Stuttgart. Come learn about the CEEC codes FLEXI/GALAXI during the poster session and stay to learn about what else is being developed on campus.
URL:https://ceec-coe.eu/event/ceec-at-the-1st-stuttgart-research-software-day/
CATEGORIES:Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260303T161000
DTEND;TZID=Europe/Paris:20260303T163000
DTSTAMP:20260415T015321
CREATED:20260223T100154Z
LAST-MODIFIED:20260223T100154Z
UID:1995-1772554200-1772555400@ceec-coe.eu
SUMMARY:FAIR-FLEXI - A Trustworthy CFD Code for Simulation and Training
DESCRIPTION:Engineering and science disciplines\, especially computational fluid dynamics (CFD) generate massive amounts of research data\, but they can only become knowledge if they can be shared and explored through data analytics and AI. This\, in turn\, requires a FAIR (findable\, accessible\, interoperable\, reusable) infrastructure. For complex research software\, however\, FAIR goes far beyond being open-source: reproducibility is hindered by hidden expertise such as user-defined parameters\, compile options\, hardware constraints\, and third-party dependencies.\nThis talk outlines the design\, implementation\, and lessons learned from FAIR-FLEXI. We discuss how comprehensive provenance capture\, portable environments\, and interactive notebooks turn CFD workflows into trustworthy\, reproducible research assets.
URL:https://ceec-coe.eu/event/fair-flexi-a-trustworthy-cfd-code-for-simulation-and-training/
CATEGORIES:Conference
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260303T182500
DTEND;TZID=Europe/Paris:20260303T185000
DTSTAMP:20260415T015321
CREATED:20260202T084610Z
LAST-MODIFIED:20260202T101246Z
UID:1983-1772562300-1772563800@ceec-coe.eu
SUMMARY:GALAEXI: An Architecture-Agnostic GPU-Acceleration Approach for Legacy Fortran Software
DESCRIPTION:Join Spencer Starr at the Society for Industrial and Applied Mathematics (SIAM)Processing for Scientific Computing (PP26)confrence in Berlin for his talk on “GALAEXI: An Architecture-Agnostic GPU-Acceleration Approach for Legacy Fortran Software” \n GALAEXI is a high-order discontinuous Galerkin spectral element method (DGSEM) computational fluid dynamics (CFD) code used for the study of compressible\, turbulent flows. It is the device-accelerated version of an existing Fortran-based\, CPU-only CFD framework. In this talk\, the chosen strategy for porting the Fortran-based compute kernels in GALAEXI to CUDA/HIP C++ is covered. Included are discussions on managing device memory\, retaining support for CPU computations\, strategies for writing and testing kernels and how to handle GPU-to-GPU MPI communication. Specific emphasis is placed on how the strategies covered can be abstracted in an architecture-agnostic way to allow the greatest degree of portability. The information presented will then be distilled into advice for those seeking to perform a similar porting effort.
URL:https://ceec-coe.eu/event/galaexi-an-architecture-agnostic-gpu-acceleration-approach-for-legacy-fortran-software/
CATEGORIES:Conference,mini-symposium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260429T140000
DTEND;TZID=Europe/Paris:20260429T150000
DTSTAMP:20260415T015321
CREATED:20260401T074420Z
LAST-MODIFIED:20260401T074420Z
UID:2024-1777471200-1777474800@ceec-coe.eu
SUMMARY:Flagship scientific applications on a European RISC-V long-vector accelerator: Lessons learned
DESCRIPTION:As Europe accelerates its efforts in chip sovereignty\, scientific applications need to be ported to and evaluated on emerging prototypes\, assessing their performance as well as the technology readiness of the new hardware platforms. In this talk\, we will share the experiences and lessons learned when porting applications from CEEC and other Centers of Excellence to the long-vector RISC-V accelerators from the EPI and EUPILOT projects across different domains and applications.\nAttendees will learn code optimization techniques\, common performance pitfalls\, and evaluation methods for long-vector architectures\, which they can apply to their own applications and code bases in order to improve performance on these novel hardware platforms. \n\n	Notice: JavaScript is required for this content.
URL:https://ceec-coe.eu/event/flagship-scientific-applications-on-a-european-risc-v-long-vector-accelerator-lessons-learned/
LOCATION:Online
CATEGORIES:Webinar
ATTACH;FMTTYPE=image/png:https://ceec-coe.eu/wp-content/uploads/2026/04/RISC-V2PosterDraft_V2-e1775029249290.png
END:VEVENT
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