Heterogeneous Architectures in WLCG

Name: Heterogeneous Architectures in WLCG
Start: 2025-12-03T08:00:00+01:00
End: 2025-12-05T18:00:00+01:00
Location: CERN

3 Dec 2025, 08:00 → 5 Dec 2025, 18:00 Europe/Zurich

31/3-004 - IT Amphitheatre (CERN)

31/3-004 - IT Amphitheatre

CERN

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Alessandro Di Girolamo (CERN), David Britton (University of Glasgow (GB)), James Letts (Univ. of California San Diego (US)), Lorenzo Moneta (CERN), Simone Campana (CERN), Sofia Vallecorsa (CERN), Stefan Roiser (CERN), Tommaso Boccali (INFN Sezione di Pisa)

Contact

lcg.office@cern.ch

Wednesday 3 December
- 08:00
  
  Welcome coffee & pastries
- Progress of Experiments and Software Projects: Session A
  
  Progress of experiments and software projects, and how they will interact with a heterogeneous WLCG environment:
  * Experiments
  * Common Software (SFT, NGT)
  * Simulation
  * Generators
  
  Conveners: Alessandro Di Girolamo (CERN), James Letts (Univ. of California San Diego (US))
  - 1
    
    Introduction
    
    Speakers: Alessandro Di Girolamo (CERN), James Letts (Univ. of California San Diego (US))
    
    251203 - WLCG Heterogeneous Architecture workshop - introduction.pdf
  - 2
    
    LHCb
    
    Speaker: Federico Stagni (CERN)
    
    LHCb.pdf
    
    LHCb (source github.io)
    
    LHCb (source: netlify)
  - 3
    
    ATLAS
    
    Speaker: Edward Moyse (University of Massachusetts (US))
    
    20251203 ATLAS WLCG Hetero Resources.pdf
- 10:40
  
  Coffee break
- Progress of Experiments and Software Projects: Session B
  
  Progress of experiments and software projects, and how they will interact with a heterogeneous WLCG environment:
  * Experiments
  * Common Software (SFT, NGT)
  * Simulation
  * Generators
  
  Conveners: Alessandro Di Girolamo (CERN), James Letts (Univ. of California San Diego (US))
  - 4
    
    ALICE
    
    Speaker: Irakli Chakaberia (Lawrence Berkeley National Lab. (US))
    
    20251203 - ALICE Readiness with Heterogeneous Architecture.pdf
  - 5
    
    CMS
    
    Speaker: Charis Kleio Koraka (University of Wisconsin Madison (US))
    
    GPU@CMS_WLCG_ckk_Dec2025.pdf
- 12:30
  
  Lunch
- Progress of Experiments and Software Projects: Session C
  
  Progress of experiments and software projects, and how they will interact with a heterogeneous WLCG environment:
  * Experiments
  * Common Software (SFT, NGT)
  * Simulation
  * Generators
  
  Conveners: Alessandro Di Girolamo (CERN), James Letts (Univ. of California San Diego (US)), Stefan Roiser (CERN)
  - 6
    
    Adept detector simulation
    
    Speaker: Severin Diederichs (CERN)
    
    SDiederichs_WLCG_meeting_03.12.2025.pdf
  - 7
    
    Celeritas detector simulation
    
    Speaker: Seth Johnson (Oak Ridge National Laboratory (US))
    
    celeritas-wlcg.pdf
  - 8
    
    Root and GPUs
    
    Speaker: Danilo Piparo (CERN)
    
    251203_WLCG_GPUs.pdf
- 15:30
  
  Coffee break
- Progress of Experiments and Software Projects: Session D
  
  Progress of experiments and software projects, and how they will interact with a heterogeneous WLCG environment:
  * Experiments
  * Common Software (SFT, NGT)
  * Simulation
  * Generators
  
  Conveners: Alessandro Di Girolamo (CERN), James Letts (Univ. of California San Diego (US)), Stefan Roiser (CERN)
  - 9
    
    Madgraph event generation
    
    Speaker: Daniele Massaro (CERN)
    
    Massaro_TALK_Heterogeneous_Architectures_in_WLCG.pdf
  - 10
    
    Pepper (Sherpa on GPU) event generation
    
    Speaker: Max Knobbe (Fermilab)
    
    wlcg_2025_knobbe.pdf
Thursday 4 December
- 08:00
  
  Welcome coffee & pastries
- AI/ML activities
  - Multi-GPU benchmarks (examples such as ML Tracking per ATLAS, Reconstruction on * * HGCAL, FlashSim, Fastsim, MLPF, online)
  - Lessons learned: Setting up scalable infrastructure from NextGEN (Ricardo)
  - Looking ahead, e.g. Large Physics Models and Federated learning for HEP data
  Conveners: Alessandro Di Girolamo (CERN), James Letts (Univ. of California San Diego (US)), Lorenzo Moneta (CERN), Dr Sofia Vallecorsa (CERN), Stefan Roiser (CERN)
  - 11
    
    Introduction
    
    Speaker: Lorenzo Moneta (CERN)
    
    Introduction_AI_WLCG.pdf
  - 12
    
    ML - experience on inference and training in ATLAS
    
    Speaker: Xiangyang Ju (Lawrence Berkeley National Lab. (US))
    
    20251203-WLCG workshop-ATLAS ML training & inference.pdf
  - 13
    
    Accelerating ML training and Hyperparameter Optimization with HPC
    
    Speaker: Eric Wulff (CERN)
    
    20251204_WLCG_Accelerating_ML_with_HPC_Eric_Wulff.pdf
    
    20251204_WLCG_Accelerating_ML_with_HPC_Eric_Wulff.pptx
  - 10:30
    
    Coffee break
  - 14
    
    Next Generation Triggers Work Package 1: feasible ML inference in grid production
    
    Speaker: Axel Naumann (CERN)
    
    WLCG-Heterogeneous-NGT-WP1.pdf
  - 15
    
    CERN ML Infrastructure
    
    Speaker: Ricardo Rocha (CERN)
    
    WLCG Workshop Dec 25_ CERN ML Infra.pdf
  - 16
    
    Large Physics Models
    
    Speaker: Sascha Caron (Nikhef National institute for subatomic physics (NL))
    
    CERN_WLCG_2025_AI.pdf
- Offering from Sites and requirements for future provisioning
  - Current offering from sites and discussion of requirements for future provisioning:
  - Site presentations, e.g. US ATLAS, US CMS, European view, CERN. Dicsussion at the end of the sites presentation.
  - Benchmarking - status, plans and key milestones
  - Provisioning and pledge discussion
  - 17
    
    Benchmarking - status, plans and key milestones
    
    Speaker: Domenico Giordano (CERN)
    
    GPU_Benchmarking_WLCG_Workshop_04_12_2025.pdf
  - 18
    
    Experience in Italy and UK
    
    Speakers: Brij Kishor Jashal (Rutherford Appleton Laboratory), Daniele Cesini (Universita e INFN, Bologna (IT))
    
    IT_UK_Heterogeneous_Arch_WS_041225.pdf
  - 19
    
    Experience in Germany
    
    Speaker: Nikita Shadskiy (KIT - Karlsruhe Institute of Technology (DE))
    
    2025_12_04_HA_WLCG25.pdf
  - 20
    
    Experience at CERN
    
    Speaker: Ben Jones (CERN)
    
    cern_wlcg_gpu_26.pdf
    
    cern_wlcg_gpu_26.pptx
  - 15:30
    
    Coffee break
  - 21
    
    Experience in U.S. (CMS)
    
    Speaker: Dirk Hufnagel (Fermi National Accelerator Lab. (US))
    
    GPU Experience and Plans in U.S.CMS.pdf
  - 22
    
    Experience in U.S. (ATLAS)
    
    Speaker: Rui Wang (Argonne National Laboratory (US))
    
    Experience in U.S. – ATLAS.pdf
  - 23
    
    Provisioning and Pledge Discussion
    
    e.g., SONIC
    
    Speakers: Dmitry Kondratyev (Purdue University (US)), Rodney Walker (Ludwig Maximilians Universitat (DE))
    
    GPU provisioning-1.pdf
    
    SONIC - WLCG Workshop Dec'25-2.pdf
Friday 5 December
- 08:00
  
  Welcome coffee & pastries
- Closing Session
  
  Closing Session to discuss, summarize, and define the work plan and next steps.
  
  Conveners: Alessandro Di Girolamo (CERN), James Letts (Univ. of California San Diego (US)), Lorenzo Moneta (CERN), Stefan Roiser (CERN)
  
  LIVE NOTES
  - 10:30
    
    Coffee break