ALL TIMES ARE U.S. CENTRAL DAYLIGHT TIME (UTC-5)
Sunday — July 27, 2025
| 1:00 p.m. | Registration opens | |
| 2:00 p.m. | Welcome and Introduction to ATPESC [SLIDES] | Ray Loy, ANL |
| 2:30 p.m. | Quick Start on ATPESC Computing Resources [SLIDES] | JaeHyuk Kwack, ANL |
| 4:30 p.m. | Participant Introductions [SLIDES] | All |
| 6:30 p.m. | Adjourn; Dinner |
Monday — July 28, 2025
Track 1 — Hardware Architectures
| 8:30 a.m. | Aurora [SLIDES] | Brice Videau, ANL |
| 9:05 a.m. | Frontier [SLIDES] | John Holmen, ORNL |
| 9:40 a.m. | Perlmutter/Doudna [SLIDES] | Jack Deslippe, NERSC |
| 10:10 a.m. | Break | |
| 10:40 a.m. | El Capitan [SLIDES] | Judy Hill, LLNL |
| 11:15 a.m. | AI Accelerators [SLIDES] | Murali Emani, ANL |
| 11:50 a.m. | Slingshot and Aurora [SLIDES] | Vitali Morozov, ANL |
| 12:30 p.m. | Lunch |
Track 2 — Programming Models
Part A: GPUs
| 1:30 p.m. | Low Level Models [SLIDES] | Thomas Applencourt, ANL Nathan Nichols, ANL |
| 3:30 p.m. | Break |
Track 2 — Programming Models
Part B: OpenMP
| [ALL SLIDES] | ||
| 4:00 p.m. | Introduction: Parallel Programming and the OpenMP Common Core | Tim Mattson, Human Learning Group |
| 4:30 p.m. | Working with Threads (including synchronization): The SPMD Pattern | Tim Mattson, Human Learning Group |
| 5:30 p.m. | Worksharing and Data Sharing: The Loop Parallelism Pattern | Tim Mattson, Human Learning Group |
| 6:30 p.m. | Dinner | |
| 7:30 p.m. | After-Dinner Talk: Scaling Computational Fluid Dynamics to Exascale and Beyond | Paul Fischer, ANL |
| 9:00 p.m. | Adjourn |
Tuesday — July 29, 2025
Track 2 — Programming Models
Part B: OpenMP (continued)
| [ALL SLIDES] | ||
| 8:30 a.m. | Task-Level Parallelism in OpenMP: The Divide and Conquer Pattern | Tim Mattson, Human Learning Group |
| 10:00 a.m. | Break | |
| 10:30 a.m. | Beyond the Common Core: More Worksharing and Synchronization …plus threadprivate | |
| 12:30 p.m. | Lunch | |
| 1:30 p.m. | Wrapping Up the CPU and Transitioning to GPU-programming | Tim Mattson, Human Learning Group |
| 3:30 p.m. | Break | |
| 4:00 p.m. | Explicit Data Movement and Basic Principles of GPU Optimization | |
| 5:30 p.m. | Detailed Control of the GPU … and Comparisons to Other GPU Programming Models | |
| 6:30 p.m. | Dinner | |
| 7:30 p.m. | After-Dinner Talk: Accelerated Quantum Supercomputing [SLIDES] | Yuri Alexeev, NVIDIA |
| 9:00 p.m. | Adjourn |
Wednesday — July 30, 2025
Track 2 — Programming Models
Part C: MPI
| [ALL SLIDES] | ||
| 8:30 a.m. | Introductions, MPI Fundamentals & Avoiding Unintended Synchronization | Ken Raffenetti, ANL |
| 10:00 a.m. | Break | |
| 10:30 a.m. | Collectives, Derived Datatypes & RMA [SLIDES] | Mike Wilkins, ANL Yanfei Guo, ANL |
| 12:30 p.m. | Lunch | |
| 1:30 p.m. | Hybrid Programming with Threads and GPUs | Hui Zhou, ANL |
| 3:00 p.m. | Break | |
| 3:45 p.m. | Hybrid Programming (continued), New Features in MPI | Hui Zhou, ANL |
| 6:30 p.m. | Dinner | |
| 7:30 p.m. | Networking Event | |
| 9:00 p.m. | Adjourn |
Thursday — July 31, 2025
Track 2 — Programming Models
Part D: SYCL and Kokkos
| 8:30 a.m. | SYCL [SLIDES] | Thomas Applencourt, ANL Abhishek Bagusetty, ANL |
| 10:00 a.m. | Break | |
| 10:30 a.m. | SYCL (continued) | |
| 12:30 p.m. | Lunch | |
| 1:30 p.m. | Kokkos [SLIDES] | Conrad Clevenger, SNL |
| 3:30 p.m. | Break | |
| 4:00 p.m. | Kokkos (continued) | |
| 6:30 p.m. | Dinner | |
| 7:30 p.m. | After-Dinner Talk: Beyond Exascale Computing [SLIDES] | Katherine (Kathy) Yelick, LBNL |
| 9:00 p.m. | Adjourn |
Friday — August 1, 2025
Track 3 — Machine Learning
| 8:30 a.m. | Welcome and Introduction | Filippo Simini, ANL |
| 8:40 a.m. | Transition time: splitting into groups (people new to deep learning vs. more experienced | |
| Parallel Session (talk/hands-on): | ||
| – Main room: Introduction to Deep Learning [REFERENCED GITHUB] | Bethany Lusch, ANL | |
| – Breakout room: Profiling Deep Learning | Khalid Hossain, ANL | |
| 9:40 a.m. | Introduction to Large Language Models (LLMs) [SLIDES] | Huihuo Zheng, ANL |
| 10:40 a.m. | Group Photo and Break | |
| 11:10 a.m. | Distributed Deep Learning (talk/hands-on) [SLIDES 1, SLIDES 2] | Nathan Nichols, ANL Kaushik Velusamy, ANL |
| 12:30 p.m. | Lunch | |
| 1:30 p.m. | Language Model Evaluation and Safety for Scientific Tasks [SLIDES] | Sandeep Madireddy, ANL |
| 2:00 p.m. | Al Testbed (talk/hands-on) [SLIDES] | Sid Raskar, PNNL |
| 3:00 p.m. | LLM inference (talk/hands-on) [SLIDES] | Sid Raskar, PNNL |
| 3:50 p.m. | Break | |
| 4:20 p.m. | Training LLMs at Scale (talk/hands-on) [SLIDES] | Shilpika, ANL |
| 5:20 p.m. | Workflow Management Tools to Couple Simulation and Al (talk/hands-on) [SLIDES] | Christine Simpson, ANL |
| 6:30 p.m. | Adjourn (dinner on your own) |
Saturday — August 2, 2025
Argonne National Laboratory Tour
| 8:30 a.m. | Bus departs Q Center from Main Entrance | |
| 9:20 a.m. | Bus arrives at ANL, badge check | |
| 9:40 a.m. | Rotating Tour Stops: – Theory and Computing Sciences Data Center – ALCF Visualization Lab – Nuclear Engineering Exhibit – Advanced Photon Source | |
| 1:00 p.m. | Lunch & Presentation: A brief history of nuclear at Argonne National Laboratory [SLIDES] Note: lunch provided for tour participants only | Dr. Amanda Bachmann, ANL |
| 2:30 p.m. | Bus departs ANL to return to Q Center. | |
| 3:30 p.m. | Bus arrives at Q Center. |
Monday — August 4, 2025
Track 4 — Data Analysis and Visualization
| 8:30 a.m. | Welcome and Introduction [SLIDES] | Joseph Insley, ANL Silvio Rizzi, ANL |
| 9:15 a.m. | Visualization and Analysis of HPC Simulation Data with VisIt [SLIDES] | Cyrus Harrison, LLNL Justin Privitera, LLNL |
| 10:00 a.m. | Break | |
| 10:30 a.m. | Visualization and Analysis of HPC Simulation Data with VisIt (continued) | |
| 11:00 a.m. | Exploring Visualization with Jupyter Notebooks [SLIDES] | David Koop, NIU |
| 11:45 a.m. | Large Scale Visualization with ParaView [SLIDES] | Dan Lipsa, Kitware |
| 12:30 p.m. | Lunch | |
| 1:30 p.m. | Large Scale Visualization with ParaView (continued) | |
| 2:00 p.m. | Uncertainty Visualization [SLIDES] | Mengjiao Han, ANL |
| 2:45 p.m. | Ascent [SLIDES] | Cyrus Harrison, LLNL Justin Privitera, LLNL |
| 3:30 p.m. | Break | |
| 4:00 p.m. | Trame [SLIDES] | Patrick Avery, Kitware |
| 4:45 p.m. | AI/ML Visualization [SLIDES] | Shilpika, ANL |
| 5:30 p.m. | Hands-on | |
| 6:30 p.m. | Dinner | |
| 7:30 p.m. | After-Dinner Talk: Growing Up at Argonne National Laboratory [SLIDES] | Jack Dongarra, UT |
| 9:00 p.m. | Adjourn |
Tuesday — August 5, 2025
Track 5 — Numerical Software
| 8:30 a.m. | Introduction to Numerical Software [SLIDES] | Ulrike Yang, LLNL |
| 9:30 a.m. | Parallel Sessions | |
| Main room: Structured Meshes (with AMReX) [SLIDES] | Andrew Myers, LBNL Weiqun Zhang, LBNL | |
| Breakout room: Unstructured Meshes (with MFEM/PUMI) [SLIDES] | Mark Shephard, RPI Cameron Smith, RPI Mark Stowell, LLNL | |
| 10:45 a.m. | Break | |
| 11:15 a.m. | Parallel Sessions | |
| Main room: Krylov Solvers & Algebraic Multigrid (with HYPRE) [SLIDES] | Daniel Osei-Kuffuor, LLNL Ulrike Yang, LLNL | |
| Breakout room: Direct Solvers (with SuperLU/STRUMPACK) [SLIDES] | Sherry Li, LBNL Yang Liu, LBNL | |
| 12:30 p.m. | Lunch | |
| 1:30 p.m. | Parallel Session Three | |
| Main room: Nonlinear Solvers (with PETSc) [SLIDES] | Richard Tran Mills, ANL | |
| Breakout room: Time Integration (with SUNDIALS) [SLIDES] | David Gardner, LLNL | |
| 2:45 p.m. | Break | |
| 3:15 p.m. | Parallel Session Four | |
| Main room: Optimization (with TAO) [SLIDES] | Toby Isaac, NVIDIA | |
| Breakout room: Iterative Solvers & Algebraic Multigrid (with Trilinos, Belos & MueLu) [SLIDES] | Christian Glusa, SNL Graham Harper, SNL | |
| 4:30 p.m. | Extreme-Scale Numerical Algorithms and Software Panel | Toby Isaac, NVIDIA Andrew Myers, LBNL Ulrike Yang, LLNL |
| 5:15 p.m. | SME Speed Dating (Optional)/Unstructured Time | |
| 6:30 p.m. | Dinner | |
| 7:30 p.m. | After-Dinner Talk: Communication-Avoiding Algorithms for Linear Algebra, Machine Learning and Beyond [SLIDES] | Jim Demmel, UC Berkeley |
| 9:00 p.m. | Adjourn |
Wednesday — August 6, 2025
Track 6 — Tools
| 8:30 a.m. | Introduction of Tools Track [SLIDES] | JaeHyuk Kwack, ANL Scott Parker, ANL |
| 8:35 a.m. | Linaro Tools [SLIDES] | Rudy Shand, Linaro |
| 10:20 a.m. | Break | |
| 10:45 a.m. | TAU [SLIDES] | Sameer Shende, Univ. of Oregon / ParaTools, Inc. |
| 12:30 p.m. | Lunch | |
| 1:30 p.m. | HPCToolkit [SLIDES] | John Mellor-Crummey, Rice |
| 3:15 p.m. | Break | |
| 3:45 p.m. | Roofline performance model [SLIDES] | JaeHyuk Kwack, ANL |
| 5:30 p.m. | Panel | Rudy Shand, Linaro Sameer Shende, Univ. of Oregon / ParaTools, Inc. John Mellor-Crummey, Rice JaeHyuk Kwack, ANL |
| 6:30 p.m. | Dinner | |
| 7:30 p.m. | Networking Event |
Thursday — August 7, 2025
Track 7 — I/O
| 8:30 a.m. | Welcome and Introduction [SLIDES] | Phil Carns, ANL |
| 8:40 a.m. | Principles of HPC I/O [SLIDES] | Phil Carns, ANL |
| 9:10 a.m. | Globus [SLIDES] | Lev Gorenstein, Globus |
| 10:00 a.m. | Break | |
| 10:30 a.m. | Darshan Introduction [SLIDES] | Phil Carns, ANL |
| 11:25 a.m. | DAOS [SLIDES] | Kevin Harms, ANL |
| 12:30 p.m. | Lunch | |
| 1:30 p.m. | MPI-IO [SLIDES] | Robert Latham, ANL |
| 2:00 p.m. | Parallel-NetCDF [SLIDES] | Robert Latham, ANL |
| 2:45 p.m. | HDF5 (part one) [SLIDES] | Scot Breitenfeld, THG |
| 3:15 p.m. | Break | |
| 3:45 p.m. | HDF5 (part two) | Scot Breitenfeld, THG |
| 4:15 p.m. | Understanding and Tuning Performance [SLIDES] | Jean Luca Bez, LBNL |
| 5:15 p.m. | AI Workloads [SLIDES] | Jean Luca Bez, LBNL |
| 6:00 p.m. | Discussion and hands-on preparation | |
| 6:30 p.m. | Dinner | |
| 7:30 p.m. | After-Dinner Talk: Conversation with the Argonne Leadership Computing Facility Director | Michael Papka, ANL/UIC |
| 9:00 p.m. | Adjourn |
Friday — August 8, 2025
Track 8 — Software Sustainability
| 8:30 a.m. | Introduction and Overview [SLIDES 1, SLIDES 2] | David Bernholdt, ORNL |
| 9:15 a.m. | Design [SLIDES] | Anshu Dubey, ANL |
| 10:00 a.m. | Break | |
| 10:30 a.m. | Spack [SLIDES] | Todd Gamblin, LLNL |
| 11:30 a.m. | Spack Hands-on | Todd Gamblin, LLNL |
| 12:30 p.m. | Lunch | |
| 1:30 p.m. | Testing [SLIDES] | Anshu Dubey, ANL |
| 2:30 p.m. | Refactoring [SLIDES] | Anshu Dubey, ANL |
| 3:00 p.m. | Break | |
| 3:30 p.m. | Licensing [SLIDES] | David Bernholdt, ORNL |
| 4:15 p.m. | Reproducibility, Lab Notebooks [SLIDES] | David Bernholdt, ORNL |
| 5:00 p.m. | Final Exam | |
| 6:00 p.m. | Adjourn [SLIDES] |