open-mpi/ompi
Nov 2024 – Jan 2026
6 Months active
Languages Used
CPerlShellM4MakefilePythonFortran
Technical Skills
Distributed SystemsLow-level ProgrammingMPIBug FixingC ProgrammingMemory Management
Gilles Gouaillardet
PROFILE
Gilles Gouaillardet
Worked on the open-mpi/ompi repository over six months, focusing on stability, portability, and maintainability in distributed systems. Delivered features to improve Fortran module management and cross-platform compatibility, including a dedicated Fortran module directory and enhanced alignment handling for common blocks using C and Makefile. Addressed complex build system issues, such as enabling Flang support on macOS and refining compiler checks for NVHPC-related Fortran types. Fixed memory leaks and improved MPI request handling, reducing runtime errors and memory growth in long-running jobs. Demonstrated depth in bug fixing, build systems, and low-level programming, consistently prioritizing code health and robust cross-platform support.
Overall Statistics
Feature vs Bugs
33%Features
Repository Contributions
6Total
Bugs
4
Commits
6
Features
2
Lines of code
213
Activity Months6
Your Network
71 peopleWork History
January 2026
1 Commits • 1 Features
Jan 1, 2026Monthly summary for 2026-01 focusing on delivering a feature to improve Fortran module management in open-mpi/ompi, with emphasis on business value, reliability, and maintainability.
1 Commits • 1 Features
Jan 1, 2026Monthly summary for 2026-01 focusing on delivering a feature to improve Fortran module management in open-mpi/ompi, with emphasis on business value, reliability, and maintainability.
January 2026
May 2025
1 Commits • 1 Features
May 1, 2025May 2025: Delivered a feature in open-mpi/ompi that fixes Fortran common block alignment and MPI_STATUS size compatibility, improving cross-platform portability and stability. Key improvements include the new OMPI_FORTRAN_GET_COMMON_ALIGNMENT macro and adjusted MPI_STATUS representation to an array to align with diverse linkers. This work reduces runtime misalignment issues and enables smoother builds across compilers and toolchains.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025: Delivered a feature in open-mpi/ompi that fixes Fortran common block alignment and MPI_STATUS size compatibility, improving cross-platform portability and stability. Key improvements include the new OMPI_FORTRAN_GET_COMMON_ALIGNMENT macro and adjusted MPI_STATUS representation to an array to align with diverse linkers. This work reduces runtime misalignment issues and enables smoother builds across compilers and toolchains.
April 2025
1 Commits
Apr 1, 2025Monthly summary for 2025-04 focusing on open-mpi/ompi bug fix: Enhanced Fortran support check for complex(REAL16) to resolve NVHPC-related MPI_Sizeof compilation issue, with targeted commit 58960cca8de2f06c25aba1db935c3f4d403fae17.
1 Commits
Apr 1, 2025Monthly summary for 2025-04 focusing on open-mpi/ompi bug fix: Enhanced Fortran support check for complex(REAL16) to resolve NVHPC-related MPI_Sizeof compilation issue, with targeted commit 58960cca8de2f06c25aba1db935c3f4d403fae17.
April 2025
March 2025
1 Commits
Mar 1, 2025March 2025 — Key OMPI work delivering Flang macOS build compatibility. Fixes to the build system enable correct translation of Flang flags on macOS, bringing Flang support to OSX; autogen.pl updated and a patch applied to ltmain.sh. This unblocks developers building with Flang on macOS and broadens compiler coverage for the project.
March 2025
1 Commits
Mar 1, 2025March 2025 — Key OMPI work delivering Flang macOS build compatibility. Fixes to the build system enable correct translation of Flang flags on macOS, bringing Flang support to OSX; autogen.pl updated and a patch applied to ltmain.sh. This unblocks developers building with Flang on macOS and broadens compiler coverage for the project.
January 2025
1 Commits
Jan 1, 2025Monthly summary for 2025-01 focusing on stabilizing collective communications in Open MPI. Delivered a targeted memory leak fix in mca_coll_acoll_comm_query for inter-communicators and single-process communicators, preventing leaks by reordering acoll_module allocation. This work improves reliability for long-running MPI jobs and reduces memory footprint in common communication patterns. No new features deployed this month; primary effort was bug-fix and code quality improvements.
1 Commits
Jan 1, 2025Monthly summary for 2025-01 focusing on stabilizing collective communications in Open MPI. Delivered a targeted memory leak fix in mca_coll_acoll_comm_query for inter-communicators and single-process communicators, preventing leaks by reordering acoll_module allocation. This work improves reliability for long-running MPI jobs and reduces memory footprint in common communication patterns. No new features deployed this month; primary effort was bug-fix and code quality improvements.
January 2025
November 2024
1 Commits
Nov 1, 2024Month: 2024-11. Focused on stabilizing MPI request handling in Open MPI by addressing MPI_COMM_NULL related edge cases in ompi_request_check_same_instance. Delivered a robust fix that ignores MPI_COMM_NULL requests to prevent erroneous error paths and improve reliability across communicators. This work reduces potential runtime failures and aligns with our commitment to correctness in MPI request lifecycles. No user-facing features added this month; major effort was in bug fix and code health. Commits: 607f3a4f1e4d6639f2c1fc3e53cc09f5ba6d6c60. Repository: open-mpi/ompi.
November 2024
1 Commits
Nov 1, 2024Month: 2024-11. Focused on stabilizing MPI request handling in Open MPI by addressing MPI_COMM_NULL related edge cases in ompi_request_check_same_instance. Delivered a robust fix that ignores MPI_COMM_NULL requests to prevent erroneous error paths and improve reliability across communicators. This work reduces potential runtime failures and aligns with our commitment to correctness in MPI request lifecycles. No user-facing features added this month; major effort was in bug fix and code health. Commits: 607f3a4f1e4d6639f2c1fc3e53cc09f5ba6d6c60. Repository: open-mpi/ompi.
Activity
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Quality Metrics
Correctness91.6%
Maintainability90.0%
Architecture90.0%
Performance81.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
CFortranM4MakefilePerlPythonShell
Technical Skills
Bug FixingBuild SystemsCC ProgrammingCompiler ConfigurationCompiler ToolchainsCross-Platform DevelopmentDistributed SystemsFortranLow-level ProgrammingMPIMakefileMemory Management
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