trilinos/Trilinos
Nov 2024 – Apr 2026
9 Months active
Languages Used
C++FortranCMakeCcmake
Technical Skills
C++Linear Algebra LibrariesParallel ComputingSoftware TransitionBuild System ConfigurationHigh-Performance Computing
Heidi Thornquist
PROFILE
Heidi Thornquist
Over nine months, contributed to the modernization and cross-platform stability of the trilinos/Trilinos repository by refactoring legacy code, enhancing test infrastructure, and improving build reliability. Focused on transitioning core components from Epetra to Tpetra, consolidating backend testing, and removing deprecated dependencies to streamline maintenance. Addressed Windows-specific build issues and cross-compiler compatibility using C++, CMake, and template metaprogramming, while implementing robust error handling and documentation updates. Improved numerical analysis workflows by updating linear algebra libraries and ensuring consistent environment variable handling across platforms. The work emphasized code clarity, maintainability, and long-term portability for high-performance computing and scientific software development.
Overall Statistics
Feature vs Bugs
55%Features
Repository Contributions
21Total
Bugs
5
Commits
21
Features
6
Lines of code
27,649,291
Activity Months9
Your Network
155 peopleSame Organization
@sandia.gov78
Work History
April 2026
2 Commits • 1 Features
Apr 1, 2026In 2026-04, progressed Trilinos modernization by transitioning TraceMin and Thyra tests/docs from Epetra to Tpetra in trilinos/Trilinos, reviving Thyra testing in Anasazi to use the Tpetra backend and ensuring compatibility with current linear algebra backends. This work enhances long-term maintainability, reduces deprecation risk, and preserves validation coverage for core numerical components.
2 Commits • 1 Features
Apr 1, 2026In 2026-04, progressed Trilinos modernization by transitioning TraceMin and Thyra tests/docs from Epetra to Tpetra in trilinos/Trilinos, reviving Thyra testing in Anasazi to use the Tpetra backend and ensuring compatibility with current linear algebra backends. This work enhances long-term maintainability, reduces deprecation risk, and preserves validation coverage for core numerical components.
April 2026
December 2025
3 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for trilinos/Trilinos: Delivered codebase modernization by removing deprecated Epetra code across Belos and Anasazi, eliminating Epetra dependencies (AztecOO, Amesos, Ifpack, ML) from source, tests, and examples. This refactor reduces legacy debt and simplifies maintenance. Implemented a robust complex-number zero comparison using Teuchos::ScalarTraits to fix Clang 16 build errors. Commit references: 553aba54d808adecf6ed29eab88992bcfae4d77f (Belos removal), c60193042377c30567a2523116602f65e3d3805c (Anasazi removal), 725f36700cf5230c0c675887374879627b3e1d24 (Teuchos ScalarTraits-based fix). Overall impact: leaner, more maintainable codebase with more reliable builds and easier onboarding. Technologies/skills: C++, template programming, cross-package refactoring, Teuchos utilities, build-system hygiene, quality assurance.
December 2025
3 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for trilinos/Trilinos: Delivered codebase modernization by removing deprecated Epetra code across Belos and Anasazi, eliminating Epetra dependencies (AztecOO, Amesos, Ifpack, ML) from source, tests, and examples. This refactor reduces legacy debt and simplifies maintenance. Implemented a robust complex-number zero comparison using Teuchos::ScalarTraits to fix Clang 16 build errors. Commit references: 553aba54d808adecf6ed29eab88992bcfae4d77f (Belos removal), c60193042377c30567a2523116602f65e3d3805c (Anasazi removal), 725f36700cf5230c0c675887374879627b3e1d24 (Teuchos ScalarTraits-based fix). Overall impact: leaner, more maintainable codebase with more reliable builds and easier onboarding. Technologies/skills: C++, template programming, cross-package refactoring, Teuchos utilities, build-system hygiene, quality assurance.
November 2025
1 Commits • 1 Features
Nov 1, 2025Month: 2025-11 — Delivered cross-platform POSIX compatibility improvements and fixed filesystem canonical handling in Trilinos, enhancing portability and reliability across Windows, Linux, and macOS. The work focused on aligning Windows behavior with POSIX expectations and correcting type handling for filesystem::canonical, resulting in fewer platform-specific issues and smoother CI.
1 Commits • 1 Features
Nov 1, 2025Month: 2025-11 — Delivered cross-platform POSIX compatibility improvements and fixed filesystem canonical handling in Trilinos, enhancing portability and reliability across Windows, Linux, and macOS. The work focused on aligning Windows behavior with POSIX expectations and correcting type handling for filesystem::canonical, resulting in fewer platform-specific issues and smoother CI.
November 2025
October 2025
2 Commits
Oct 1, 2025October 2025: Focused on stabilizing Windows builds for Zoltan2/ZLU2 integration in Trilinos. Delivered two targeted fixes addressing Windows-specific build blockers, enabling successful compilation across toolchains and improving CI reliability.
October 2025
2 Commits
Oct 1, 2025October 2025: Focused on stabilizing Windows builds for Zoltan2/ZLU2 integration in Trilinos. Delivered two targeted fixes addressing Windows-specific build blockers, enabling successful compilation across toolchains and improving CI reliability.
September 2025
1 Commits
Sep 1, 2025September 2025 monthly summary focusing on key accomplishments, major bug fixes, and impact. Key highlights include a critical cross-platform bug fix in Trilinos for environment variable retrieval.
1 Commits
Sep 1, 2025September 2025 monthly summary focusing on key accomplishments, major bug fixes, and impact. Key highlights include a critical cross-platform bug fix in Trilinos for environment variable retrieval.
September 2025
August 2025
5 Commits
Aug 1, 2025August 2025 monthly summary for trilinos/Trilinos. Focused on stabilizing Windows builds and cross-compiler support across Trilinos components. Implemented fixes across Tpetra and Zoltan to ensure reliable Windows builds, improved compiler flag handling (-fp-model=precise) and MSVC compatibility shims, and updated Windows-specific configurations. Strengthened cross-compiler configuration and CMake I/O settings to improve CI stability and developer onboarding for Windows-based HPC environments. Result: fewer build failures, faster issue resolution, and broader Windows support for Trilinos deployments.
August 2025
5 Commits
Aug 1, 2025August 2025 monthly summary for trilinos/Trilinos. Focused on stabilizing Windows builds and cross-compiler support across Trilinos components. Implemented fixes across Tpetra and Zoltan to ensure reliable Windows builds, improved compiler flag handling (-fp-model=precise) and MSVC compatibility shims, and updated Windows-specific configurations. Strengthened cross-compiler configuration and CMake I/O settings to improve CI stability and developer onboarding for Windows-based HPC environments. Result: fewer build failures, faster issue resolution, and broader Windows support for Trilinos deployments.
July 2025
5 Commits • 2 Features
Jul 1, 2025Delivered major test infrastructure and code clarity improvements for Trilinos in July 2025, focusing on cross-backend testing (Belos/Anasazi) and MPI macro safety. Key outcomes include expanded test matrices and parity testing across Epetra/Tpetra, cleanup of unused test variables and data, and clearer macro scoping to avoid conflicts. These changes increase test reliability, enable faster CI feedback, and improve maintainability for ongoing Anasazi/Belos work.
5 Commits • 2 Features
Jul 1, 2025Delivered major test infrastructure and code clarity improvements for Trilinos in July 2025, focusing on cross-backend testing (Belos/Anasazi) and MPI macro safety. Key outcomes include expanded test matrices and parity testing across Epetra/Tpetra, cleanup of unused test variables and data, and clearer macro scoping to avoid conflicts. These changes increase test reliability, enable faster CI feedback, and improve maintainability for ongoing Anasazi/Belos work.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for trilinos/Trilinos focused on unifying backend testing and expanding cross-backend support for ModalAnalysisSolvers and BlockDavidson. Key outcomes include refactoring Epetra-based ModalAnalysisSolvers into a dedicated Epetra directory, establishing a Tpetra-based testing path, and adding Tpetra-based tests for BlockDavidson solvers. Improved conditional compilation for Kokkos::complex<> with Teuchos::LAPACK to enable better cross-backend compatibility. This work enhances portability, test coverage, and long-term maintainability of the Trilinos solvers across backends. Commit reference: fe6bf8f528037385cbc32eced4a3372c4bb4f55c (Anasazi: ModalAnalysis cleanup and Tpetra testing improvements).
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for trilinos/Trilinos focused on unifying backend testing and expanding cross-backend support for ModalAnalysisSolvers and BlockDavidson. Key outcomes include refactoring Epetra-based ModalAnalysisSolvers into a dedicated Epetra directory, establishing a Tpetra-based testing path, and adding Tpetra-based tests for BlockDavidson solvers. Improved conditional compilation for Kokkos::complex<> with Teuchos::LAPACK to enable better cross-backend compatibility. This work enhances portability, test coverage, and long-term maintainability of the Trilinos solvers across backends. Commit reference: fe6bf8f528037385cbc32eced4a3372c4bb4f55c (Anasazi: ModalAnalysis cleanup and Tpetra testing improvements).
November 2024
1 Commits
Nov 1, 2024November 2024 — trilinos/Trilinos: Stabilized the Epetra to Tpetra transition for Xyce with 64-bit global ordinals. Delivered targeted fixes across AMD transformations, memory allocation in Ifpack, and Isorropia behavior to ensure 64-bit indexing is correct and non-disruptive. These changes reduce migration risk, improve correctness for large-scale simulations, and align with 64-bit indexing strategy across core components. Commit: 22eb977c16076fa9278b6aa44a434376e4795e75.
1 Commits
Nov 1, 2024November 2024 — trilinos/Trilinos: Stabilized the Epetra to Tpetra transition for Xyce with 64-bit global ordinals. Delivered targeted fixes across AMD transformations, memory allocation in Ifpack, and Isorropia behavior to ensure 64-bit indexing is correct and non-disruptive. These changes reduce migration risk, improve correctness for large-scale simulations, and align with 64-bit indexing strategy across core components. Commit: 22eb977c16076fa9278b6aa44a434376e4795e75.
November 2024
Activity
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Quality Metrics
Correctness94.2%
Maintainability93.4%
Architecture92.8%
Performance86.2%
AI Usage21.0%
Skills & Technologies
Programming Languages
CC++CMakeFortrancmake
Technical Skills
Build SystemBuild System ConfigurationBuild SystemsBuild systemsC++C++ DevelopmentC++ developmentCode OrganizationCode RefactoringCompiler ErrorsCompiler FlagsCross-Platform DevelopmentCross-platform developmentEigenvalue ProblemsHigh-Performance Computing
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