E3SM-Project/E3SM
Oct 2024 – Jun 2025
7 Months active
Languages Used
PythonCMakeFortranC++cmakeShellC
Technical Skills
Configuration ManagementTestingBuild System ConfigurationConfigurationPerformance OptimizationScientific Computing
Andrew M. Bradley
PROFILE
Andrew M. Bradley
Ambradl contributed to the E3SM-Project/E3SM repository by developing and refining features for atmospheric and climate modeling, focusing on high-performance computing environments. Over seven months, Ambradl enhanced trajectory components, improved build system reliability, and expanded test coverage, addressing both performance and correctness. Using C++, Fortran, and CMake, Ambradl modernized code for GPU acceleration and parallel computing, implemented robust validation for numerical weather prediction, and introduced precise performance instrumentation. The work included debugging complex synchronization issues and optimizing configuration management, resulting in more reliable production runs and reproducible CI pipelines. These contributions demonstrated technical depth and careful cross-architecture maintenance.
Overall Statistics
Feature vs Bugs
56%Features
Repository Contributions
27Total
Bugs
8
Commits
27
Features
10
Lines of code
5,745
Activity Months7
Your Network
172 peopleSame Organization
@sandia.gov68
Shared Repositories
104
Abhishek BagusettyMember
Erin ThomasMember
Erin ThomasMember
Andrew RobertsMember
Andrew RobertsMember
Alexander HagerMember
Andrew M. BradleyMember
Andrew NolanMember
Azamat MametjanovMember
Work History
June 2025
2 Commits
Jun 1, 2025June 2025 — E3SM: Stabilized NLmaps test runs and refined post-run filtering to reduce CI flakiness and improve data precision. Implemented tolerance adjustments and stricter post-run filtering with traceable commits, enabling faster feedback and higher reproducibility.
2 Commits
Jun 1, 2025June 2025 — E3SM: Stabilized NLmaps test runs and refined post-run filtering to reduce CI flakiness and improve data precision. Implemented tolerance adjustments and stricter post-run filtering with traceable commits, enabling faster feedback and higher reproducibility.
June 2025
April 2025
3 Commits
Apr 1, 2025April 2025: Delivered targeted debuggability and SYCL visibility improvements in E3SM, focusing on Aurora-specific build cleanups and improved error reporting. Cleanups to the EAMxx machine file for Aurora aligned with CIME-provided NetCDF configurations and removed debug-hindering flags (-O3, -DNDEBUG) to enhance debuggability. Implemented Kokkos::printf for SYCL in Hommexx to ensure correct visibility of out-of-bounds errors during interpolation. These changes reduce debugging time, improve deploy reliability across architectures, and demonstrate robust cross-architecture maintenance.
April 2025
3 Commits
Apr 1, 2025April 2025: Delivered targeted debuggability and SYCL visibility improvements in E3SM, focusing on Aurora-specific build cleanups and improved error reporting. Cleanups to the EAMxx machine file for Aurora aligned with CIME-provided NetCDF configurations and removed debug-hindering flags (-O3, -DNDEBUG) to enhance debuggability. Implemented Kokkos::printf for SYCL in Hommexx to ensure correct visibility of out-of-bounds errors during interpolation. These changes reduce debugging time, improve deploy reliability across architectures, and demonstrate robust cross-architecture maintenance.
March 2025
10 Commits • 4 Features
Mar 1, 2025Monthly summary for 2025-03 focusing on key accomplishments, business value, and technical achievements in E3SM repository. Highlights include enabling robust conservation and hardware-accelerated configurations on Aurora, stabilizing the build/test pipeline, and delivering enhancements that improve physical fidelity and performance potential across GPU-enabled environments.
10 Commits • 4 Features
Mar 1, 2025Monthly summary for 2025-03 focusing on key accomplishments, business value, and technical achievements in E3SM repository. Highlights include enabling robust conservation and hardware-accelerated configurations on Aurora, stabilizing the build/test pipeline, and delivering enhancements that improve physical fidelity and performance potential across GPU-enabled environments.
March 2025
February 2025
2 Commits
Feb 1, 2025February 2025: Delivered stability and reliability hardening in E3SM to reduce build failures on HPC systems and eliminate threading race conditions. Implemented important code-level fixes across EAMxx and HOMMEXX/SL, with commits addressing frontier/compiler-related constraints and synchronization-critical paths. These changes improve long-term maintainability and enable smoother operation for production runs on Frontier and similar HPC environments.
February 2025
2 Commits
Feb 1, 2025February 2025: Delivered stability and reliability hardening in E3SM to reduce build failures on HPC systems and eliminate threading race conditions. Implemented important code-level fixes across EAMxx and HOMMEXX/SL, with commits addressing frontier/compiler-related constraints and synchronization-critical paths. These changes improve long-term maintainability and enable smoother operation for production runs on Frontier and similar HPC environments.
January 2025
7 Commits • 4 Features
Jan 1, 2025January 2025 Monthly Summary for E3SM (E3SM repository). Overview: Implemented trajectory component enhancements and refactor in HOMMEXX/SL, modernized Kokkos compatibility, improved correctness in halo settings and boolean logic, and added performance instrumentation to identify vertical remapping bottlenecks. These changes improve maintainability, portability, and observable performance, delivering business value through more reliable models and faster optimization cycles. Key accomplishments: - Trajectory component enhancements and refactor in HOMMEXX/SL to improve maintainability and semi-Lagrangian trajectory support. - Kokkos compatibility update for HOMMEXX/SL to align with latest Kokkos, removing deprecated atomics and refactoring view-of-view structures. - Halo auto-setting robustness improvements for semi-Lagrangian: ensure halo at least 1 via integer division with offset. - Type mismatch bug fix in driver module: correct boolean handling by using logical .false. instead of integer 0. - Performance instrumentation around vertical remapping: added GPTL timing to quantify vertical_remap bottlenecks.
7 Commits • 4 Features
Jan 1, 2025January 2025 Monthly Summary for E3SM (E3SM repository). Overview: Implemented trajectory component enhancements and refactor in HOMMEXX/SL, modernized Kokkos compatibility, improved correctness in halo settings and boolean logic, and added performance instrumentation to identify vertical remapping bottlenecks. These changes improve maintainability, portability, and observable performance, delivering business value through more reliable models and faster optimization cycles. Key accomplishments: - Trajectory component enhancements and refactor in HOMMEXX/SL to improve maintainability and semi-Lagrangian trajectory support. - Kokkos compatibility update for HOMMEXX/SL to align with latest Kokkos, removing deprecated atomics and refactoring view-of-view structures. - Halo auto-setting robustness improvements for semi-Lagrangian: ensure halo at least 1 via integer division with offset. - Type mismatch bug fix in driver module: correct boolean handling by using logical .false. instead of integer 0. - Performance instrumentation around vertical remapping: added GPTL timing to quantify vertical_remap bottlenecks.
January 2025
December 2024
2 Commits • 1 Features
Dec 1, 2024Month: 2024-12. This period delivered critical bug fix and validation enhancements in the E3SM repository, focusing on timer accuracy in SYCL builds and expanded validation for semi-Lagrangian trajectory methods in EAM/EAMxx. Key outcomes include improved build accuracy, reduced JIT cost counting, improved thread-safety and efficiency, and broader validation coverage driving more reliable physics integration.
December 2024
2 Commits • 1 Features
Dec 1, 2024Month: 2024-12. This period delivered critical bug fix and validation enhancements in the E3SM repository, focusing on timer accuracy in SYCL builds and expanded validation for semi-Lagrangian trajectory methods in EAM/EAMxx. Key outcomes include improved build accuracy, reduced JIT cost counting, improved thread-safety and efficiency, and broader validation coverage driving more reliable physics integration.
October 2024
1 Commits • 1 Features
Oct 1, 2024October 2024: Delivered a dedicated REP L128 test in the EAMxx component of the E3SM repository, expanding test coverage and validating REP L128 configurations. No major bugs fixed in this period (per available data). Impact: stronger validation in CI, reduced risk for production runs, and clearer traceability from changes to commits. Demonstrated skills in test automation, rigorous regression testing, and repository hygiene within a large Fortran/C++ scientific codebase.
1 Commits • 1 Features
Oct 1, 2024October 2024: Delivered a dedicated REP L128 test in the EAMxx component of the E3SM repository, expanding test coverage and validating REP L128 configurations. No major bugs fixed in this period (per available data). Impact: stronger validation in CI, reduced risk for production runs, and clearer traceability from changes to commits. Demonstrated skills in test automation, rigorous regression testing, and repository hygiene within a large Fortran/C++ scientific codebase.
October 2024
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Quality Metrics
Correctness86.2%
Maintainability89.6%
Architecture81.8%
Performance74.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
CC++CMakeFortranPythonShellcmake
Technical Skills
Atmospheric ModelingBuild System ConfigurationBuild SystemsC++C++ DevelopmentCMakeClimate ModelingCode InstrumentationCode RefactoringCompiler FlagsCompiler WarningsConfigurationConfiguration ManagementData AnalysisEnvironment Variable Configuration
Repositories Contributed To
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