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llnl

259 indexed repositories · View on GitHub

zfp
Compressed numerical arrays that support high-speed random access

C++ · 885 stars
rose
ROSE is an open-source compiler framework engineered by LLNL supporting program analysis and transformation at both the source and binary...

C · 688 stars
sundials
Official development repository for SUNDIALS - a SUite of Nonlinear and DIfferential/ALgebraic equation Solvers. Pull requests are welcom...

C · 686 stars
RAJA
RAJA Performance Portability Layer (C++)

C++ · 598 stars
OGhidra
OGhidra bridges Large Language Models (LLMs) via Ollama with the Ghidra reverse engineering platform, enabling AI-driven binary analysis ...

Python · 440 stars
Umpire
An application-focused API for memory management on NUMA & GPU architectures

C++ · 422 stars
Caliper
Caliper is an instrumentation and performance profiling library

C++ · 420 stars
blt
A streamlined CMake build system foundation for developing HPC software

C++ · 296 stars
HPC-Tutorials
Future home of hpc-tutorials.llnl.gov

C · 257 stars
SAMRAI
Structured Adaptive Mesh Refinement Application Infrastructure - a scalable C++ framework for block-structured AMR application development

C++ · 250 stars
LEAP
comprehensive library of 3D transmission Computed Tomography (CT) algorithms with Python and C++ APIs, a PyQt GUI, and fully integrated w...

Cuda · 249 stars
conduit
Simplified Data Exchange for HPC Simulations

C++ · 248 stars
smith
Smith is a high order nonlinear thermomechanical simulation code

C++ · 245 stars
libROM
Data-driven model reduction library with an emphasis on large scale parallelism and linear subspace methods

C++ · 236 stars
hiop
HPC solver for nonlinear optimization problems

C++ · 229 stars
magpie
Magpie contains a number of scripts for running Big Data software in HPC environments, including Hadoop and Spark. There is support for L...

Shell · 198 stars
axom
CS infrastructure components for HPC applications

C++ · 196 stars
units
A run-time C++ library for working with units of measurement and conversions between them and with string representations of units and me...

C++ · 171 stars
maestrowf
A tool to easily orchestrate general computational workflows both locally and on supercomputers

Python · 161 stars
merlin
Machine Learning for HPC Workflows

Python · 151 stars
239 more repositories live on View on GitHub

Beginner friendly Everything

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Switch to CI partitions Open

llnl/spheral#529 · 1 assignee · Opened Sep 18, 2026
Add local dev authenticator Open

llnl/wormhole-route-registry#21 · 1 assignee · Opened Sep 17, 2026
Support for >1 Interpolation Region in MF=6 LAW=1 Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

llnl/fudge#30 · Opened Sep 16, 2026
Optimize MPI communication Open

enhancement

llnl/DD-NM-ROM#8 · 1 assignee · Opened Sep 16, 2026
Investigate launch time overhead on Tuo Open

enhancement

llnl/DD-NM-ROM#7 · 1 assignee · Opened Sep 16, 2026
nvcc issues with mfem::future::tuple Open

cuda

llnl/smith#1659 · 1 assignee · Opened Sep 16, 2026
Provide addition time/retry for NATS startup Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

llnl/wormhole-holepunch#20 · Opened Sep 16, 2026
ODR violation in GWN Open

App Integration bug compiler Quest User Request

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

llnl/axom#1983 · Opened Sep 15, 2026
blt_patch_target needs to handle import targets Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

llnl/blt#775 · Opened Sep 15, 2026
Non-linear solver performance for time-dependent problems Open

enhancement

llnl/DD-NM-ROM#5 · 1 assignee · Opened Sep 14, 2026
[BUG] KLU 64bit integer not recognized Open

bug triage

Difficulty 3/5 1-2 days Newbie friendliness 68/100

llnl/sundials#1016 · Opened Sep 14, 2026
RAJA::range(N) performance regression Open

llnl/RAJA#2087 · 10 comments · 1 assignee · Opened Sep 11, 2026
Sundials libraries 32int and 64int Open

triage

Difficulty 5/5 Over a week Newbie friendliness 45/100

llnl/sundials#1015 · 2 comments · Opened Sep 11, 2026
Host allocation follow-on work Open

App Integration Core maintenance Reviewed

Difficulty 5/5 Over a week Newbie friendliness 35/100

llnl/axom#1982 · Opened Sep 10, 2026
Add "known version" to `cmake_minimum_required` in `ConduitConfig.cmake` Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

llnl/conduit#1697 · Opened Sep 10, 2026
Add concepts for slam's sets, relations and maps Open

Reviewed Slam

llnl/axom#1979 · 1 assignee · Opened Sep 8, 2026
Axom Issue Triage Open

help wanted maintenance Reviewed

llnl/axom#1977 · 10 assignees · Opened Sep 3, 2026
petsc+shared fails on docker container builds Open

build

llnl/smith#1656 · 1 assignee · Opened Sep 3, 2026
How do we handle PDFs? Open

llnl/pEyeON#106 · 1 assignee · Opened Sep 3, 2026
load_projections() function crash Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

llnl/LEAP#215 · Opened Sep 3, 2026
Feature: Programmatic method of kicking off OGhidra jobs Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

llnl/OGhidra#58 · Opened Sep 2, 2026
Feature: Expose JSON responses for headless operations Open

Difficulty 3/5 1-2 days Newbie friendliness 70/100

llnl/OGhidra#57 · Opened Sep 2, 2026
Feature: Dry run for `rename all functions` Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

llnl/OGhidra#56 · Opened Sep 2, 2026
Feature: provide entrypoint candidates Open

llnl/OGhidra#55 · 1 assignee · Opened Sep 2, 2026
Feature: Configuring default ghidra auto-analysis Open

llnl/OGhidra#54 · 1 assignee · Opened Sep 2, 2026
db_perror could handle object name and component name better Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

llnl/Silo#580 · Opened Sep 2, 2026
No avaliable aarch64 roseBinaryEDG Open

llnl/rose#464 · 2 comments · 1 assignee · Opened Sep 2, 2026
Avoid double deinitialization of MFEM's global state when Tribol is shared Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

llnl/smith#1655 · Opened Sep 1, 2026
Revamp AMS debug THROW Open

bug

llnl/AMS#206 · 1 assignee · Opened Sep 1, 2026
Update `flux-python` to the Latest Version Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

llnl/mada-tools#54 · Opened Sep 1, 2026
TensorTrainAMEN fails when the RHS has an internal TT rank greater than one Open

bug

llnl/BoBa#2 · 1 comment · 1 assignee · Opened Sep 1, 2026
Use GitLab signing tokens instead of webhook secrets Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

llnl/hubcast#424 · Opened Aug 31, 2026
[GPU] Modify masterLists and coarseNeighbors types Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

llnl/spheral#525 · Opened Aug 31, 2026
[GPU] Create NeighborView Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

llnl/spheral#524 · Opened Aug 31, 2026
model returning `None` instead of response string Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

llnl/OGhidra#53 · 1 comment · Opened Aug 31, 2026
Problem with multimat and cuda@13.2 Open

bug compiler cuda multimat Reviewed

Difficulty 3/5 1-2 days Newbie friendliness 65/100

llnl/axom#1971 · 1 comment · Opened Aug 28, 2026
Thoroughly remove s2dmap and d2smap for `generate_centroids` Open

llnl/conduit#1689 · 1 assignee · Opened Aug 28, 2026
Curves should be colored based off of curve fitter used Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

llnl/Curvallis#86 · Opened Aug 28, 2026
Unchecked file-declared counts overflow fixed-size buffers in five PDB driver readers Open

llnl/Silo#577 · 2 comments · 1 assignee · Opened Aug 28, 2026
SECURITY.md points at private vulnerability reporting, but it is not enabled on this repository Open

Difficulty 1/5 Under an hour Newbie friendliness 52/100

llnl/zfp#304 · 2 comments · Opened Aug 28, 2026
iterators: Are RAJA::Iterators::numeric_iterator still useful? Open

compilation reviewed Software design Software health

llnl/RAJA#2082 · 1 comment · 1 assignee · Opened Aug 28, 2026
Exercise mfem Device functionality in hip/cuda configs Open

App Integration GPU Quest Reviewed TPL

Difficulty 4/5 3-5 days Newbie friendliness 48/100

llnl/axom#1966 · 1 comment · Opened Aug 27, 2026
build on nvidia machines with enzyme Open

cuda

llnl/smith#1653 · 1 assignee · Opened Aug 26, 2026
Add backend-neutral aliases for non-sized direct_unchecked device policies Open

API/usability reviewed

llnl/RAJA#2081 · 1 assignee · Opened Aug 26, 2026
Performance pipeline reporting is failing Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

llnl/RAJAPerf#705 · Opened Aug 26, 2026
avoid Xcompiler flags if building with llvm+enzyme+cuda Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

llnl/Tribol#240 · 1 comment · Opened Aug 25, 2026
Reinvestigate minimum required CMake version for different architectures. Open

Build system Documentation Reviewed

Difficulty 4/5 3-5 days Newbie friendliness 48/100

llnl/axom#1965 · Opened Aug 25, 2026
Power dropped in format of user defined unit Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

llnl/units#467 · Opened Aug 25, 2026
AttributeError: module 'pkgutil' has no attribute 'get_loader' on Python 3.14 Open

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

llnl/maestrowf#486 · Opened Aug 24, 2026
consider beefing up error checking in relay hdf5 option ingestion logic Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

llnl/conduit#1681 · Opened Aug 24, 2026

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