First InPEx meeting

June 05, 2023

LocationParisDateJune 05, 2023OrganizerInria

Workshop Presentation

The objective of this workshop was by gathering several American, European and Japanese experts and institutions’ representatives to present the state of the Art of the Exascale ecosystem as well as discuss on the opportunities proposed by NumPEx to launch a series of workshops, between Europe, US and Japan to exchange and share results and experiences on scientific and technological Exascale challenges (hardware, software stack and sustainability, licence policy and applications, software development and applications, etc.)

The following decisions have been made:

One of the main priorities on the upcoming weeks is to define the scope of the first workshop (scheduled for October in France), as well as set up a tight organization in term of agendas and attendees. The definition of the objective and “roadmap” of such event is critical to bring about relevant Exascale agencies and bodies to join the initiative and gather their support.


      • Two or three days, keynotes and breakout sessions – Every 9 months, successively in Europe, the US and Japan – 100 participants – Host country covers all accommodation and food costs (not travels) for provisionnal budget: 100K€
      • The proposed date for this first workshop (2 days session) is October 19-20, 2023 (plan B: October 12-13, 2023)


      • Software production and management:
      • Packaging, documentation, builds, results, catalogs, continuous integration, Linux builds (E4S, etc.)
      • Future and disruptive SW Technologies (investments and roadmaps)
      • Containerization, LLVM, parallel tools, etc.
      • Mapping of missing capabilities (driven by both Apps and SW)
      • Roadmap of near-term HW targets
      • Datasets for AI training
      • FAIR data stewardship
      • Benchmarks and evaluation, co-design (HW&SW)
      • Energy and environmental impact and sustainability
      • Software sustainability
      • Collaboration/Partnership factory : establish collaborations at international level
      • Training

Upcoming actions

Search and initial proposal for the October workshop’s location

Definition and preparation of October workshop’s agenda and goals / list of attendees

Preparation of a 2023 SC’s Bird of Feather submission (drafting of abstract and description)

End of June 2023.

NumPEx Project Office (Florian Piffet).

Before Summer holidays.

NumPEx Project Office.

Before July 7, 2023 (deadline for submission).

Marc Asch & Emmanuel Jeannot (sharing of proposed pre-draft) – US & Japan contributors.

first inpex

Agenda & Documentation


  1. European context overview – Anders Jensen, EuroHPC JU, 15 min
  2. France – Stéphane Requena, Genci, 15 min
  3. Germany – Bernd Mohr, Julich, 15 min
  4. Spain – Sergi Girona, BSC, 15 min
  5. French NumPEx program:
    o NumPEx motivations, objectives – Jean-Yves Berthou, Jerome Bobin, Michel Dayde), 10 min
    o NumPEx projects and software stack – NumPEx project leaders, (4×7 min)
    o NumPEx co-design of exascale applications – Jean-Pierre Vilotte (10 min)
    o NumPEx software production – Bruno Raffin (10 min)

11:00 - 11:15 - Break

Exascale US context, Jack Dongarra, Pete Beckman

Exascale Japan context, Satoshi Matsuoka

12:15 - 14:00 - Exchange & Lunch

STF: goals, expectations, participants, logistic, budget, agenda, sources of funding

15:30 - 15:45 - Break

Exchanges with DOE’s and EuroHPC JU’sprogram managers: Synthesis of discussions and exchanges

Meeting Notes


  • Jack Dongarra Emeritus Professor University of Tennessee Department of Electrical Engineering and Computer Science
  • Pete Beckman Co-director of the Northwestern University/Argonne Institute for Science and Engineering
  • Satoshi Matsuoka – Director RIKEN Center for Computational Science (R-CCS) – Professor, Dept. Mathematical and Computing Sciences, Tokyo Institute of Technology
  • Anders Jensen, Executive Director European High Performance Computing Joint Undertaking (EuroHPC JU)
  • Sergi Girona Operations Director at Barcelona Supercomputing Center
  • Mohr Bernd Deputy Division Head – Jülich Supercomputing Centre (JSC)
  • Laurent Crouzet Head of Department – Digital Services and Infrastructures – Directorate General for Research and Innovation, French Ministry of Research
  • Stéphane Requena Technical and Innovation Director GENCI
  • Jean-Yves Berthou Director of the Inria Saclay Research Center & Co-director French NumPEx Program
  • Jérôme Bobin Research Director – CEA & Co-director French NumPEx Program
  • Michel Daydé Deputy Scientific Director Europe and International, Industrial Partnerships, Computing and Open Data INS2I – CNRS & Co-director French NumPEx Program
  • Christophe Prud’homme Professor at University of Strasbourg & NumPEx Project leader (Exa-Ma)
  • Raymond Namyst Professor at University of Bordeaux & NumPEx Project leader (Exa-Soft)
  • Gabriel Antoniu Senior Research Scientist at INRIA Rennes & NumPEx Project leader (ExaDost)
  • Francois Bodin Professor at University of Rennes & NumPEx Project leader (Exa-AtoW)
  • Jean-Pierre Vilotte Scientific Delegate for Computing and Data at INSU – CNRS & NumPEx Project leader (Exa-DI)
  • Mark Ash, Professor at University of Picardie, WP NumPEx leader (Exa-DI, Exa-Ma, ExaAtoW)
  • Bruno Raffin Director of Research at INRIA, Grenoble, NumPEx WP leader (Exa-DI)
  • Christophe Calvin, Deputy to the Director of Fundamental Research in charge of HPC and simulation CEA
  • Emmanuel Jeannot, Scientific Director of Inria Bordeaux
  • Jacques-Charles Lafoucriere Programme Manager at CEA

Invited to the videoconference:

  • Thuc Hoang, Acting Director of ASC and Institutional Research and Development Programs for the Department of Energy National Nuclear Security Administration.
  • Simon Hammond, Federal Program Manager, Office of Advanced Simulation and Computing & Institutional Research and Development Programs (NA-114),  National Nuclear Security Administration (NNSA)
  • Ceren Susut, Office of Science, U.S. Department of Energy (DOE)
  • Yasumasa Watanabe, Computional Science promotion Office, RIKEN
  • Yutaka Hara, Computional Science promotion Office, RIKEN

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