dealii/dealii
Dec 2024 – May 2026
9 Months active
Languages Used
C++textCMakeplaintext
Technical Skills
C++ DevelopmentFinite Element MethodsC++Parallel ComputingSoftware DevelopmentLinear Algebra
Marco Feder
PROFILE
Marco Feder
Marco Feder contributed to the dealii/dealii repository by engineering advanced features and robust fixes for high-performance scientific computing. He integrated MPI-enabled solvers such as MUMPS and PSBLAS, refactored sparse matrix backends for PETSc and Trilinos compatibility, and enhanced distributed vector support to improve scalability and reliability in parallel environments. Using C++, CMake, and MPI, Marco developed modular interfaces, improved error handling, and expanded test coverage for mesh generation, finite element mapping, and boundary extraction. His work demonstrated depth in algorithm design and numerical methods, resulting in more maintainable code and accurate, efficient simulations across complex distributed computing workflows.
Overall Statistics
Feature vs Bugs
76%Features
Repository Contributions
33Total
Bugs
4
Commits
33
Features
13
Lines of code
14,555,055
Activity Months9
Your Network
87 peopleWork History
May 2026
4 Commits • 2 Features
May 1, 2026May 2026 monthly summary for dealii/dealii: Delivered significant enhancements to boundary mesh extraction and grid robustness, improving simulation boundary condition handling and mesh orientation validation. Implemented 3D simplex support for boundary extraction with accompanying tests, and refined grid generation with better exception handling, dimension definitions, and compatibility checks, accompanied by rigorous orientation tests in 2D/3D. These changes improve solver reliability, accuracy, and test coverage across complex mesh scenarios.
4 Commits • 2 Features
May 1, 2026May 2026 monthly summary for dealii/dealii: Delivered significant enhancements to boundary mesh extraction and grid robustness, improving simulation boundary condition handling and mesh orientation validation. Implemented 3D simplex support for boundary extraction with accompanying tests, and refined grid generation with better exception handling, dimension definitions, and compatibility checks, accompanied by rigorous orientation tests in 2D/3D. These changes improve solver reliability, accuracy, and test coverage across complex mesh scenarios.
May 2026
December 2025
7 Commits • 4 Features
Dec 1, 2025December 2025 monthly summary for dealii/dealii focusing on business value and technical achievements: The team delivered notable feature work and interface improvements that enhance scalability, performance, and test reliability across distributed computing environments. Key outcomes include enhanced DoF handling for particle generation, improved interoperability with distributed linear algebra backends, and robust testing alignment to ensure consistent results under updated simulation parameters.
December 2025
7 Commits • 4 Features
Dec 1, 2025December 2025 monthly summary for dealii/dealii focusing on business value and technical achievements: The team delivered notable feature work and interface improvements that enhance scalability, performance, and test reliability across distributed computing environments. Key outcomes include enhanced DoF handling for particle generation, improved interoperability with distributed linear algebra backends, and robust testing alignment to ensure consistent results under updated simulation parameters.
November 2025
2 Commits • 2 Features
Nov 1, 2025Month: 2025-11 — Focused on delivering modularity improvements and correctness in DoF mapping for point support in dealii/dealii, with clear business value in maintainability and numerical accuracy.
2 Commits • 2 Features
Nov 1, 2025Month: 2025-11 — Focused on delivering modularity improvements and correctness in DoF mapping for point support in dealii/dealii, with clear business value in maintainability and numerical accuracy.
November 2025
October 2025
10 Commits • 2 Features
Oct 1, 2025October 2025: Delivered two major features for dealii/dealii with a focus on parallel performance and code quality. Key achievements: 1) PSBLAS integration with MPI-enabled parallel computing: MPI init/finalize, improved CMake, explicit communicator handling, PSBLAS vectors, and tests; CI/build/test pipeline improvements. 2) PSCToolkit vector operations: added add(scalar), scale(vec), mean_value, with tests; internal enhancements including error handling refactors, memory management improvements, and namespace updates to PSCToolkitWrappers. Major fixes: CI pipeline stabilization and removal of default communicator edge cases. Impact: enables scalable MPI-based simulations, broader vector operation capabilities, and improved reliability. Technologies/skills: MPI, PSBLAS, PSCToolkit, CMake, unit testing, error handling, memory management, code organization, and CI automation.
October 2025
10 Commits • 2 Features
Oct 1, 2025October 2025: Delivered two major features for dealii/dealii with a focus on parallel performance and code quality. Key achievements: 1) PSBLAS integration with MPI-enabled parallel computing: MPI init/finalize, improved CMake, explicit communicator handling, PSBLAS vectors, and tests; CI/build/test pipeline improvements. 2) PSCToolkit vector operations: added add(scalar), scale(vec), mean_value, with tests; internal enhancements including error handling refactors, memory management improvements, and namespace updates to PSCToolkitWrappers. Major fixes: CI pipeline stabilization and removal of default communicator edge cases. Impact: enables scalable MPI-based simulations, broader vector operation capabilities, and improved reliability. Technologies/skills: MPI, PSBLAS, PSCToolkit, CMake, unit testing, error handling, memory management, code organization, and CI automation.
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary focusing on key accomplishments, major deliverables, and impact for the dealii repository. Highlights include integrating the MUMPS direct solver into the sparse direct solver framework and updating docs to reflect the new backend, expanding solver options and improving user onboarding.
1 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary focusing on key accomplishments, major deliverables, and impact for the dealii repository. Highlights include integrating the MUMPS direct solver into the sparse direct solver framework and updating docs to reflect the new backend, expanding solver options and improving user onboarding.
July 2025
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for dealii/dealii: Focused on Sparse Matrix Backend Enhancements with MPI-aware interface and PETSc/Trilinos-backed initialization. Delivered refactor of SparseDirectMUMPS to include MPI communicator support and robustness checks; refactored sparse matrix initialization to leverage PETSc and Trilinos interfaces for better performance and integration. These changes improve scalability for large sparse systems and streamline collaboration with external solvers, aligning with HPC workflows and industry standards.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for dealii/dealii: Focused on Sparse Matrix Backend Enhancements with MPI-aware interface and PETSc/Trilinos-backed initialization. Delivered refactor of SparseDirectMUMPS to include MPI communicator support and robustness checks; refactored sparse matrix initialization to leverage PETSc and Trilinos interfaces for better performance and integration. These changes improve scalability for large sparse systems and streamline collaboration with external solvers, aligning with HPC workflows and industry standards.
May 2025
5 Commits • 1 Features
May 1, 2025May 2025 monthly performance summary for dealii/dealii: Delivered MPI-enabled SparseDirectMUMPS integration, refined initialization, and stabilized tests to improve scalability and reliability for large-scale HPC workloads.
5 Commits • 1 Features
May 1, 2025May 2025 monthly performance summary for dealii/dealii: Delivered MPI-enabled SparseDirectMUMPS integration, refined initialization, and stabilized tests to improve scalability and reliability for large-scale HPC workloads.
May 2025
January 2025
1 Commits
Jan 1, 2025January 2025 (dealii/dealii): Key robustness fix for distributed triangulations. Fixed type mismatch in dynamic_cast during parallel checks, preventing assertions and ensuring correct identification of parallel triangulations across template dimensions. Commit: 3e1f917f8a11163ff56445b74ea3503a9776da30. Impact: increased reliability of large-scale distributed mesh computations and reduced debugging time for users. Technologies: C++, dynamic_cast, template programming, parallel computation patterns.
January 2025
1 Commits
Jan 1, 2025January 2025 (dealii/dealii): Key robustness fix for distributed triangulations. Fixed type mismatch in dynamic_cast during parallel checks, preventing assertions and ensuring correct identification of parallel triangulations across template dimensions. Commit: 3e1f917f8a11163ff56445b74ea3503a9776da30. Impact: increased reliability of large-scale distributed mesh computations and reduced debugging time for users. Technologies: C++, dynamic_cast, template programming, parallel computation patterns.
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary for dealii/dealii: A focused bug fix addressing vertex DoF identities in hp-refinement for discontinuous elements, clarifying behavior and improving robustness of hp-refinement. Removed an assertion in hp_vertex_dof_identities that previously checked DGP element types and returned an empty vector, aligning with the fact that discontinuous elements have no vertex dof identities with neighbors. Implemented in commit 3cbd40273e36bc3636dc80f9f46f8b9d86dff47c with message 'Remove assert in dof identities for DGP'. This work reduces spurious test failures, improves reliability of DoF mapping, and supports stable hp-adaptive refinement across element types.
1 Commits
Dec 1, 2024December 2024 monthly summary for dealii/dealii: A focused bug fix addressing vertex DoF identities in hp-refinement for discontinuous elements, clarifying behavior and improving robustness of hp-refinement. Removed an assertion in hp_vertex_dof_identities that previously checked DGP element types and returned an empty vector, aligning with the fact that discontinuous elements have no vertex dof identities with neighbors. Implemented in commit 3cbd40273e36bc3636dc80f9f46f8b9d86dff47c with message 'Remove assert in dof identities for DGP'. This work reduces spurious test failures, improves reliability of DoF mapping, and supports stable hp-adaptive refinement across element types.
December 2024
Activity
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Quality Metrics
Correctness94.6%
Maintainability87.8%
Architecture91.0%
Performance86.4%
AI Usage21.8%
Skills & Technologies
Programming Languages
C++CMakeplaintexttext
Technical Skills
Algorithm DesignC++C++ DevelopmentC++ MetaprogrammingC++ developmentC++ programmingCMakeCMake configurationContinuous IntegrationFinite Element MethodsHigh-Performance ComputingLinear AlgebraLinear Algebra LibrariesMPIMathematics
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