Our research projects vary in size, scope, and duration, but they share a focus on developing tools and methods that help LLNL deliver on its missions to the nation and, more broadly, advance the state of the art in scientific HPC. Projects are organized here in three ways: Active projects are those currently funded and regularly updated. Legacy projects are no longer actively developed. The A-Z option sorts all projects alphabetically, both active and legacy.

Active | A-Z | Legacy


Improving Communications for Large-Scale Computing

Livermore Computing staff is enhancing the high-speed InfiniBand data network used in many of its high performance computing and file systems.

Topological Analysis

Charting Data’s Peaks and Valleys

LLNL and University of Utah researchers have developed an advanced, intuitive method for analyzing and visualizing complex data sets.


Tracking Space Debris

Testbed Environment for Space Situational Awareness software helps to track satellites and space debris and prevent collisions.


Improving Lustre Efficiency

Computer scientists are incorporating ZFS into their high-performance parallel file systems for better performance and scalability.


Non-Intrusive Uncertainty Quantification

The flourishing of simulation-based scientific discovery has also resulted in the emergence of the verification and validation (V&V) and uncertainty quantification (UQ) disciplines. The goal…


Compressed Floating-Point and Integer Arrays

zfp is an open-source C/C++ library for compressed floating-point and integer arrays that support high throughput read and write random access.


Performance Analysis and Visualization at Exascale

Performance analysis of parallel scientific codes is becoming increasingly difficult, and existing tools fall short in revealing the root causes of performance problems. We have developed the HAC…


Fast Global File Status

Fast Global File Status (FGFS) is an open-source package that provides scalable mechanisms and programming interfaces to retrieve global information of a file.


Scalable Shared Library Loading

Spindle improves the library-loading performance of dynamically linked HPC applications. It plugs into the system’s dynamic linker and intercepts its file operations so that only one process (or…


Power Measurement

libMSR provides a convenient interface to access Model Specific Registers and to allow tools to utilize their full functionality.

Serpentine Wave Propagation

Advanced Finite Difference Methods

The Serpentine project develops advanced finite difference methods for solving hyperbolic wave propagation problems. Our approach is based on solving the governing equations in second order…


Running Millions of Concurrent MPI Jobs

Cram lets you easily run many small MPI jobs within a single, large MPI job by splitting MPI_COMM_WORLD up into many small communicators to run each job in the cram file independently.


Application Introspection System

A comprehensive understanding of the performance behavior of large-scale simulations requires the ability to compile, analyze, and compare measurements and contexts from many independent sources.…


Livermore Metagenomics Analysis Toolkit

The Livermore Metagenomic Analysis Toolkit (LMAT) is a genome sequencing technology that helps accelerate the comparison of genetic fragments with reference genomes and improve the accuracy of the…

Memory-Centric Architectures

Exploiting Emerging Persistent Memory

A new, complex memory/storage hierarchy is emerging, with persistent memories offering greatly expanded capacity, and augmented by DRAM/SRAM cache and scratchpads to mitigate latency.

Application-Level Resilience

Efficient Algorithmic Fault Tolerance

Application-level resilience is emerging as an alternative to traditional fault tolerance approaches because it provides fault tolerance at a lower cost than traditional approaches.


High-Order Finite Element Hydrodynamics

Through research funded at LLNL, scientists have developed BLAST, a high-order finite element hydrodynamics research code that improves the accuracy of simulations, provides a path to extreme…


Scalable Checkpoint/Restart for MPI

With SCR, jobs run more efficiently, recover more work upon failure, and reduce load on critical shared resources.


Parallel Time Integration with Multigrid

The scalable multigrid reduction in time (XBraid) approach constructs coarse time grids and uses each coarse time scale solution to improve the next finer-scale solution, ultimately yielding an…