diagram showing many colored boxes (denoting software packages) connected by complex lines (denoting dependency relationships)


Source: LLNL Computing

Road to El Capitan 7: Packaging for everyone

Backed by Spack’s robust functionality, the Packaging Working Group manages the relationships between user software and system software.

Exascale | HPC Architectures | HPC Systems and Software | Hybrid/Heterogeneous | Open-Source Software | Software Build and Installation

Judy Hill presents at a lectern to an auditorium of people


Source: LLNL Computing

Road to El Capitan 10: Collaboration is key

The El Capitan Center of Excellence provides a conduit between national labs and commercial vendors, ensuring that the exascale system will meet everyone’s needs.

Co-Design | Collaborations | Emerging Architectures | Exascale | HPC Architectures | HPC Systems and Software | Hybrid/Heterogeneous

nine people stand as a group in front of the Sierra supercomputer


Source: LLNL Computing

Road to El Capitan 8: Prepping for performance

The Tools Working Group delivers debugging, correctness, and performance analysis solutions at an unprecedented scale.

Debugging and Correctness | Exascale | HPC Architectures | HPC Systems and Software | Hybrid/Heterogeneous | Performance, Portability, and Productivity

looking down a row of racks with exposed wires, three people install components of El Capitan


Source: LLNL Computing

Road to El Capitan 9: Messaging and math

The advent of accelerated processing units presents new challenges and opportunities for teams responsible for network interconnects and math libraries.

Exascale | HPC Architectures | HPC Systems and Software | Hybrid/Heterogeneous | Networking and Interconnects | Programming Languages and Models | Software Engineering | Software Libraries

Todd's portrait next to the PTW logo


Source: LLNL News

Todd Gamblin named to HPCwire’s 'People to Watch' list for 2024

The high performance computing publication HPCwire has selected LLNL computer scientist Todd Gamblin as one of its “People to Watch” in HPC for 2024. The program recognized 12 HPC professionals who “play leading roles in driving innovation within their particular fields, making significant contributions to society as a whole.”

Careers | HPC Systems and Software

a person connects wires inside the supercomputer's racks


Source: Pleasanton Weekly

LLNL set to deploy world’s fastest supercomputer this year

The system will enable researchers from the National Nuclear Security Administration weapons design laboratories to create models and run simulations, previously considered challenging, time-intensive or impossible, for the maintenance and modernization of the United States’ nuclear weapons stockpile.

Emerging Architectures | Exascale | HPC Systems and Software

Cerebras components installed in one of the Lassen racks


Source: LLNL Computing

New research in time integration methods recognized at IEEE conference

Can novel mathematical algorithms help scientific simulations leverage hardware designed for machine learning? A team from LLNL’s Center for Applied Scientific Computing aimed to find out.

CogSim/AI/ML Hardware | Computational Math | Emerging Architectures | ODE Methods

meeting attendees posed as a group outside UCLCC


Source: LLNL Computing

Meeting of the minds: advanced math for the exascale era

Hosted at LLNL, the Center for Efficient Exascale Discretizations’ annual event featured breakout discussions, more than two dozen speakers, and an evening of bocce ball.

Co-Design | Computational Math | Computational Science | Discrete Mathematics | Earth Systems | Emerging Architectures | Events | Exascale | HPC Systems and Software

3D simulation of a shock interaction that looks like a colorful cylinder peeling back at one end


Source: LLNL Computing

Flux team members posed as a group outside building 453


Source: LLNL Computing

Pythagoras and Bronis hoist a Rabbit node into a rack of the Hetchy early access system


Source: LLNL Computing

the Systems Software and Security group standing in front of the Sierra supercomputer


Source: LLNL Computing

Road to El Capitan 3: The right operating system

The Tri-Lab Operating System Stack (TOSS) ensures other national labs’ supercomputing needs are met.

Co-Design | Collaborations | Emerging Architectures | Exascale | HPC Architectures | HPC Systems and Software | Hybrid/Heterogeneous

three people install an early access system rack in the machine room


Source: LLNL Computing

Road to El Capitan 2: All the moving parts

Siting a supercomputer requires close coordination of hardware, software, applications, and Livermore Computing facilities.

Co-Design | Emerging Architectures | Exascale | HPC Architectures | HPC Systems and Software | Hybrid/Heterogeneous | Performance, Portability, and Productivity | Resource and Workflow Management

El Capitan supercomputer side view


Source: LLNL Computing

Road to El Capitan 1: It takes a village

Livermore Computing is making significant progress toward siting the NNSA’s first exascale supercomputer.

Co-Design | Collaborations | Emerging Architectures | Exascale | HPC Architectures | HPC Systems and Software | Hybrid/Heterogeneous

Real scanning electron microscope image of TATB powder, alongside a hypothetical scanning electron microscope image of TATB powder made to optimize its peak stress. The hypothetical image is made of smaller grains.


Source: LLNL Computing

Explainable artificial intelligence can enhance scientific workflows

Using explainable artificial intelligence techniques can help increase the reach of machine learning applications in materials science, making the process of designing new materials much more efficient.

AI/ML | Computational Science | Data Science | Materials and Manufacturing | ML Theory | Scientific ML | Scientific Visualization

rainbow-colored Mercator-like map of the world with red zones near the equator and blue zones near the poles


Source: LLNL Computing

VisIt project team adds color usability improvements

The Lab’s workhorse visualization tool provides expanded color map features, including for visually impaired users.

Data Science | Open-Source Software | Scientific Visualization | Software Engineering

brightly multi-colored circle on a dark blue background


Source: LLNL Computing

CASC Newsletter | Vol 13 | July 2023

This issue highlights some of CASC’s contributions to making controlled laboratory fusion possible at the National Ignition Facility.

Collaborations | Computational Math | Data Science | Lasers and Optics | Scientific ML | Scientific Visualization | Transport

Jacob Wahlgren is on stage accepting the Research Poster Award certificate


Source: LLNL Computing

Investigation of disaggregated memory systems wins poster award

Splitting memory resources in HPC between local nodes and a larger shared remote pool can help better support computational applications.

Awards | Data Movement and Memory | HPC Systems and Software | Hybrid/Heterogeneous

Ignacio Laguna and colleagues standing with the ISC 2023 Hans Meuer Award certificate.


Source: LLNL Computing

Best paper winner finds the sources of calculation inconsistencies

Updating a compiler can affect how code runs, leading to inconsistencies in outputs and creating problems for scientists. A new tool automatically finds the sources of these inconsistencies.

Awards | Compiler Technology | HPC Systems and Software | Open-Source Software

Unidentified employee (Ruth Kilby, possible) with IBM 704, November 1957


Source: LLNL Computing

A look back: women in early computing at LLNL

LLNL’s archives recount the contributions of women who developed code during the Lab's early decades.

Careers | Community | HPC Systems and Software | Programming Languages and Models

black-and-white photo of Robert Hughes at his desk in the 1970s


Source: LLNL Computing

Ruby supercomputer under purple lighting


Source: LLNL Computing