llnl/RAJA

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RAJA Performance Portability Layer (C++)

Stars: 598
Forks: 118
Open beginner issues: 0
Indexed issues: 170
Avg merge: 21h 29m
Merged PRs (30d): 1

Dominant language: C++
License: BSD-3-Clause
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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170 open issues indexed

RAJA::range(N) performance regression Open

llnl/RAJA#2087 · 10 comments · 1 assignee · Opened Sep 11, 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
Add backend-neutral aliases for non-sized direct_unchecked device policies Open

API/usability reviewed

llnl/RAJA#2081 · 1 assignee · Opened Aug 26, 2026
Connect reference sections to examples in User Guide Open

documentation help wanted reviewed

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

llnl/RAJA#2079 · Opened Aug 13, 2026
Building MFEM performance miniapps fails with RAJA+CUDA Open

compilation reviewed vectorization API

llnl/RAJA#2077 · 8 comments · 1 assignee · Opened Aug 5, 2026
Triage current open issues Open

reviewed Software health

llnl/RAJA#2075 · 2 comments · 6 assignees · Opened Aug 5, 2026
Windows CI tests for Windows Visual Studio 2026 Open

compilation reviewed testing Windows support

llnl/RAJA#2067 · 2 comments · 1 assignee · Opened Jul 29, 2026
RAJA deprecated policies Open

cuda support hip support reviewed Software health

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

llnl/RAJA#2066 · Opened Jul 28, 2026
Make reduction code more consistent across GPU back-ends Open

documentation openmp target support Reductions reviewed sycl support testing

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

llnl/RAJA#2060 · Opened Jul 16, 2026
Add atomic tests that use the returned value Open

Atomics support reviewed testing

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

llnl/RAJA#2056 · 1 comment · Opened Jul 10, 2026
Modernize CMAKE CUDA support Open

compilation cuda support reviewed

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

llnl/RAJA#2053 · Opened Jul 7, 2026
make param reductions compatible with IndexValue types Open

API/usability Reductions reviewed testing

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

llnl/RAJA#2051 · Opened Jun 30, 2026
Extensions to Python like ranges Open

API/usability reviewed

Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/RAJA#2037 · Opened Jun 9, 2026
Compiler flags required for application building not visible. Open

API/usability compilation cuda support reviewed

llnl/RAJA#2035 · 1 assignee · Opened Jun 8, 2026
Examples/tests fail to build if backends (CUDA/ROCm) are not present when building Open

compilation reviewed testing

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

llnl/RAJA#2034 · Opened Jun 8, 2026
IndexValue indices Open

API/usability reviewed testing

llnl/RAJA#2027 · 3 comments · 1 assignee · Opened May 18, 2026
Adding RAJA AGENTS/skills files Open

help wanted reviewed task

llnl/RAJA#2023 · 2 comments · 4 assignees · Opened May 5, 2026
Clarification on synchronization semantics for reductions on HIP vs CUDA backends Open

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

llnl/RAJA#2022 · 5 comments · Opened May 3, 2026
Ready Vectorization API for Deployment Open

API/usability Enhancement reviewed vectorization API

llnl/RAJA#2019 · 1 assignee · Opened Apr 28, 2026
Consider partitioning RAJA.hpp Open

compilation Enhancement reviewed task

Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/RAJA#2015 · Opened Apr 15, 2026
Add testing and examples to the new LaunchContext features Open

API/usability documentation launch reviewed

llnl/RAJA#2000 · 1 assignee · Opened Mar 4, 2026
Issues when building with CUDA on windows with Visual studio, latest release 2025 Open

compilation cuda support reviewed Windows support

llnl/RAJA#1960 · 2 comments · 1 assignee · Opened Dec 17, 2025
ODR issues with SYCL Open

sycl support

llnl/RAJA#1953 · 2 comments · 2 assignees · Opened Dec 10, 2025
Remove deprecated SYCL header files Open

sycl support

llnl/RAJA#1951 · 1 assignee · Opened Dec 9, 2025
CI Improvements Open

help wanted testing

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

llnl/RAJA#1943 · Opened Nov 14, 2025
Set Default Layout Size to 0 Open

API/usability documentation reviewed

llnl/RAJA#1938 · 1 comment · 1 assignee · Opened Nov 11, 2025
Build fails on 32-bit system: undefined reference: RAJA::TypedIndexSet<RAJA::TypedRangeSegment<int, int>, RAJA::TypedListSegment<int>>::T0_TypeId Open

compilation Windows support

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

llnl/RAJA#1936 · Opened Nov 4, 2025
Improve User Guide Open

documentation Enhancement

llnl/RAJA#1931 · 1 comment · 6 assignees · Opened Oct 29, 2025
Random number generation Open

API/usability cuda support Enhancement hip support

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

llnl/RAJA#1927 · Opened Oct 6, 2025
Matrix Transpose Tutorial Cleanup Open

documentation reviewed

Difficulty 3/5 1-2 days Newbie friendliness 42/100

llnl/RAJA#1916 · 2 comments · Opened Sep 21, 2025
Great Warning Squash! Open

API/usability compilation reviewed

llnl/RAJA#1895 · 8 assignees · Opened Sep 2, 2025
Refactor launch/forall to use same openmp loop code Open

openmp support reviewed task

llnl/RAJA#1887 · 1 reaction · 2 assignees · Opened Aug 22, 2025
cpp 20: use concepts to improve compiler errors for RAJA users Open

API/usability compilation reviewed

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

llnl/RAJA#1882 · 3 comments · Opened Aug 18, 2025
cpp 17: simplify kernel implementations with fold experessions Open

llnl/RAJA#1881 · 1 assignee · Opened Aug 18, 2025
cpp 17: replace recursive template instantiation with camp::num using fold expression Open

llnl/RAJA#1879 · 1 assignee · Opened Aug 18, 2025
Warnings with GCC 12.1.1 Open

compilation reviewed vectorization API

llnl/RAJA#1856 · 1 assignee · Opened Jun 6, 2025
Support more policies with sycl launch backend Open

launch reviewed sycl support

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

llnl/RAJA#1855 · Opened Jun 6, 2025
feature: follow up to kernel reducers Open

API/usability feature openmp support Reductions reviewed sycl support

llnl/RAJA#1849 · 1 assignee · Opened May 23, 2025
Underlying intrinsics for atomicMin/atomicMax not available in x86 Windows configs Open

API/usability Atomics support reviewed Windows support

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

llnl/RAJA#1848 · Opened May 15, 2025
feature: kernel naming Open

API/usability kernel reviewed

llnl/RAJA#1827 · 1 assignee · Opened Apr 23, 2025
RAJA Local Reduce? Open

API/usability Reductions

Difficulty 5/5 Over a week Newbie friendliness 25/100

llnl/RAJA#1816 · Opened Apr 10, 2025
design: should ValOp<type>::operator+= return a ValOp&? Open

API/usability Reductions reviewed

Difficulty 5/5 Over a week Newbie friendliness 20/100

llnl/RAJA#1814 · Opened Apr 2, 2025
Provided script fails to build RAJA Open

compilation documentation reviewed

llnl/RAJA#1813 · 1 comment · 1 assignee · Opened Apr 2, 2025
Add Exclusive Prefix Sum (Scan) Example Open

documentation scan support

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

llnl/RAJA#1811 · 3 comments · Opened Mar 29, 2025
RAJA Hackathon Topics Open

help wanted

Difficulty 5/5 Over a week Newbie friendliness 15/100

llnl/RAJA#1807 · Opened Mar 18, 2025
Concepts for high-dimensional loops for RAJA Open

API/usability launch reviewed

llnl/RAJA#1806 · 1 reaction · 1 assignee · Opened Mar 17, 2025
docs: ideas for cookbook Open

API/usability documentation reviewed

Difficulty 5/5 Over a week Newbie friendliness 30/100

llnl/RAJA#1800 · Opened Mar 10, 2025
Add Cookbook entry for using resources with multiple streams Open

documentation

llnl/RAJA#1785 · 1 reaction · 1 assignee · Opened Jan 14, 2025
Clean up namespacing and static variable declarations. Open

help wanted reviewed task

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

llnl/RAJA#1779 · Opened Dec 10, 2024
Consider allowing the regular reference for the single-component reducer types Open

API/usability reviewed

llnl/RAJA#1777 · 1 assignee · Opened Dec 5, 2024

llnl/RAJA

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