stfc/PSyclone
Nov 2024 – Aug 2025
10 Months active
Languages Used
FortranMakefilePythonShellYAMLreStructuredTextBashDiff
Technical Skills
CI/CDCode LintingCode RefactoringCode TransformationConfigurationDocumentation
Sergi Siso
PROFILE
Sergi Siso
Sergi Siso developed and maintained advanced parallelization, testing, and build automation features for the stfc/PSyclone repository, focusing on robust integration with the NEMO climate modeling system. He engineered dynamic module import resolution, enhanced GPU offloading, and expanded test coverage, using Python, Fortran, and shell scripting to streamline CI/CD workflows and improve code reliability. Sergi’s work included optimizing OpenMP and OpenACC transformations, refining error handling, and automating profiling and benchmarking. By addressing device compatibility, build stability, and reproducibility, he delivered maintainable solutions that accelerated validation cycles and reduced integration risk, demonstrating deep expertise in scientific computing and software engineering.
Overall Statistics
Feature vs Bugs
64%Features
Repository Contributions
155Total
Bugs
20
Commits
155
Features
36
Lines of code
6,804
Activity Months10
Your Network
117 peopleSame Organization
@stfc.ac.uk95
Shared Repositories
22
Work History
August 2025
37 Commits • 7 Features
Aug 1, 2025August 2025 (2025-08) performance update for stfc/PSyclone focused on stabilizing NEMO integration, strengthening test automation, and improving code quality. Key outcomes include robust error handling for NEMO unsupported OMPMinimiseSyncTrans cases; stabilization of NEMO integration tests and the results pipeline across NEMOv4/v5 with separate folders for async jobs and a dedicated NEMOv5 results step; extraction/integration test path fixes, mongosh adjustments, and reliable results reporting; targeted code quality improvements in utils.py and validation methods; API/documentation enhancements (private accessors, Node.has_a, spelling consistency) and release hygiene efforts (async file exclusion, changelog updates). These efforts reduce CI risk, accelerate feedback loops, and enhance reliability for downstream users and teams.
37 Commits • 7 Features
Aug 1, 2025August 2025 (2025-08) performance update for stfc/PSyclone focused on stabilizing NEMO integration, strengthening test automation, and improving code quality. Key outcomes include robust error handling for NEMO unsupported OMPMinimiseSyncTrans cases; stabilization of NEMO integration tests and the results pipeline across NEMOv4/v5 with separate folders for async jobs and a dedicated NEMOv5 results step; extraction/integration test path fixes, mongosh adjustments, and reliable results reporting; targeted code quality improvements in utils.py and validation methods; API/documentation enhancements (private accessors, Node.has_a, spelling consistency) and release hygiene efforts (async file exclusion, changelog updates). These efforts reduce CI risk, accelerate feedback loops, and enhance reliability for downstream users and teams.
August 2025
July 2025
18 Commits • 4 Features
Jul 1, 2025July 2025 PSyclone monthly summary focused on delivering robust parallelization enhancements, expanding test coverage, and strengthening tooling integration with NEMO. The work emphasizes business value through increased performance, reliability, and reproducibility across major PSyclone components.
July 2025
18 Commits • 4 Features
Jul 1, 2025July 2025 PSyclone monthly summary focused on delivering robust parallelization enhancements, expanding test coverage, and strengthening tooling integration with NEMO. The work emphasizes business value through increased performance, reliability, and reproducibility across major PSyclone components.
June 2025
9 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for stfc/PSyclone: Delivered targeted improvements across device string handling, NEMO v5 integration testing/CI profiling workflows, and GPU offloading tooling. These efforts improve device compatibility reliability, CI feedback and profiling capabilities, and end-to-end build readiness for GPU offloading, directly supporting faster validation, reduced risk, and enhanced performance insights.
9 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for stfc/PSyclone: Delivered targeted improvements across device string handling, NEMO v5 integration testing/CI profiling workflows, and GPU offloading tooling. These efforts improve device compatibility reliability, CI feedback and profiling capabilities, and end-to-end build readiness for GPU offloading, directly supporting faster validation, reduced risk, and enhanced performance insights.
June 2025
May 2025
14 Commits • 2 Features
May 1, 2025May 2025 PSyclone – concise performance-focused summary: - Implemented dynamic NEMO module import resolution and configuration with RESOLVE_IMPORTS and NEMO_MODULES_TO_IMPORT, enabling caching-based symbol information and flexible dependency handling across Nemo-related code. This includes updates to the core transformation modules (acc_kernels_trans.py, acc_loops_trans.py, omp_cpu_trans.py, omp_gpu_trans.py). - Added LFRic colour-tiling integration test with Met Office model, plus workflow and documentation improvements to support end-to-end validation. - Strengthened stability and reliability by excluding problematic BENCH files and a problematic NEMO file (dtatsd.f90) from processing, reducing runtime errors and flaky builds. - Improved user-facing error messaging and clarifications in tests, notably around array_reference handling. - Overall impact: faster, more reliable build-time symbol resolution; improved test coverage and maintainability; clearer diagnostics for users and developers. Business value: reduced maintenance burden, smoother downstream integration for Nemo/LFRic workflows, and more predictable CI/builds with targeted test and processing improvements.
May 2025
14 Commits • 2 Features
May 1, 2025May 2025 PSyclone – concise performance-focused summary: - Implemented dynamic NEMO module import resolution and configuration with RESOLVE_IMPORTS and NEMO_MODULES_TO_IMPORT, enabling caching-based symbol information and flexible dependency handling across Nemo-related code. This includes updates to the core transformation modules (acc_kernels_trans.py, acc_loops_trans.py, omp_cpu_trans.py, omp_gpu_trans.py). - Added LFRic colour-tiling integration test with Met Office model, plus workflow and documentation improvements to support end-to-end validation. - Strengthened stability and reliability by excluding problematic BENCH files and a problematic NEMO file (dtatsd.f90) from processing, reducing runtime errors and flaky builds. - Improved user-facing error messaging and clarifications in tests, notably around array_reference handling. - Overall impact: faster, more reliable build-time symbol resolution; improved test coverage and maintainability; clearer diagnostics for users and developers. Business value: reduced maintenance burden, smoother downstream integration for Nemo/LFRic workflows, and more predictable CI/builds with targeted test and processing improvements.
April 2025
15 Commits • 3 Features
Apr 1, 2025April 2025 PSyclone update focused on strengthening NEMO/NEMOV5 validation, increasing CI reliability across architectures, and hardening offloading capabilities. Key deliverables include a revamped NEMO/NEMOV5 test infrastructure with updated Spack environments, MPI/OpenMP testing, and multi-GPU support; PSyclone tooling enhancements for more reliable NEMO interface detection and device-offloading decisions; and Gocean example offloading robustness improvements with OpenACC transformations. A major bug fix package stabilized NEMOV5 compilation by excluding problematic Fortran files and refining the parser/front-end naming to avoid NVIDIA offloading conflicts; plus guarded exclusion lists to prevent known issues.
15 Commits • 3 Features
Apr 1, 2025April 2025 PSyclone update focused on strengthening NEMO/NEMOV5 validation, increasing CI reliability across architectures, and hardening offloading capabilities. Key deliverables include a revamped NEMO/NEMOV5 test infrastructure with updated Spack environments, MPI/OpenMP testing, and multi-GPU support; PSyclone tooling enhancements for more reliable NEMO interface detection and device-offloading decisions; and Gocean example offloading robustness improvements with OpenACC transformations. A major bug fix package stabilized NEMOV5 compilation by excluding problematic Fortran files and refining the parser/front-end naming to avoid NVIDIA offloading conflicts; plus guarded exclusion lists to prevent known issues.
April 2025
March 2025
5 Commits • 2 Features
Mar 1, 2025In March 2025, PSyclone NEMO-related work focused on expanding test coverage, hardening hoisting handling, and improving loop transformation robustness to deliver higher reliability, faster debugging, and stronger software quality. These changes reduce runtime errors, improve maintainability, and provide clearer error feedback for NEMO transformations.
March 2025
5 Commits • 2 Features
Mar 1, 2025In March 2025, PSyclone NEMO-related work focused on expanding test coverage, hardening hoisting handling, and improving loop transformation robustness to deliver higher reliability, faster debugging, and stronger software quality. These changes reduce runtime errors, improve maintainability, and provide clearer error feedback for NEMO transformations.
February 2025
29 Commits • 8 Features
Feb 1, 2025February 2025 PSyclone monthly summary focused on stabilizing and expanding integration test coverage across NEMOv5, NEMOv4, and NEMO, tightening CI workflows, and positioning for Nemo 5.0RC. Delivered targeted test fixes and exclusions, improved nvfortran handling, and implemented code quality and performance enhancements. The work reduced release risk, improved test reliability, and demonstrated strong CI, test automation, and Fortran/NEMO expertise.
29 Commits • 8 Features
Feb 1, 2025February 2025 PSyclone monthly summary focused on stabilizing and expanding integration test coverage across NEMOv5, NEMOv4, and NEMO, tightening CI workflows, and positioning for Nemo 5.0RC. Delivered targeted test fixes and exclusions, improved nvfortran handling, and implemented code quality and performance enhancements. The work reduced release risk, improved test reliability, and demonstrated strong CI, test automation, and Fortran/NEMO expertise.
February 2025
January 2025
9 Commits • 3 Features
Jan 1, 2025January 2025 (Month: 2025-01) – PSyclone GPU offloading stabilization, intrinsic support expansion, and CI/test enhancements. The work focused on making GPU offloading robust and reproducible, expanding intrinsic coverage for GPU-accelerated paths, and standardizing CI/testing, including a new NEMOv5 ORCA1 integration test for NVIDIA GPUs. These efforts reduced runtime errors, increased test reliability, and accelerated validation of GPU-enabled workflows for ORCA1/NEMOv5 deployments.
January 2025
9 Commits • 3 Features
Jan 1, 2025January 2025 (Month: 2025-01) – PSyclone GPU offloading stabilization, intrinsic support expansion, and CI/test enhancements. The work focused on making GPU offloading robust and reproducible, expanding intrinsic coverage for GPU-accelerated paths, and standardizing CI/testing, including a new NEMOv5 ORCA1 integration test for NVIDIA GPUs. These efforts reduced runtime errors, increased test reliability, and accelerated validation of GPU-enabled workflows for ORCA1/NEMOv5 deployments.
December 2024
10 Commits • 2 Features
Dec 1, 2024December 2024 monthly performance summary for stfc/PSyclone focusing on GPU offloading integration with NEMO and CI/benchmarking improvements. Delivered robust enhancements to GPU offloading exclusions, improved recognition of NEMO functions, refined symbol classification, and implemented several code quality improvements. Also advanced NEMO v5 CI, testing, and benchmarking workflows, enabling GPU test workflows, reducing unnecessary CI runs, and adding a 10-timestep benchmark with run statistics. Fixed critical NEMOv5 script issues and flake8 cleanups to improve maintainability and reliability.
10 Commits • 2 Features
Dec 1, 2024December 2024 monthly performance summary for stfc/PSyclone focusing on GPU offloading integration with NEMO and CI/benchmarking improvements. Delivered robust enhancements to GPU offloading exclusions, improved recognition of NEMO functions, refined symbol classification, and implemented several code quality improvements. Also advanced NEMO v5 CI, testing, and benchmarking workflows, enabling GPU test workflows, reducing unnecessary CI runs, and adding a 10-timestep benchmark with run statistics. Fixed critical NEMOv5 script issues and flake8 cleanups to improve maintainability and reliability.
December 2024
November 2024
9 Commits • 3 Features
Nov 1, 2024November 2024 (2024-11) PSyclone delivered strong performance and reliability gains in the NEMOv5 track, focusing on OpenMP improvements, CI/test stability, and code quality. The work produced faster NEMOv5 runs, reproducible test outcomes, and maintainable code, enabling easier scaling of NEMOv5 adoption across the team.
November 2024
9 Commits • 3 Features
Nov 1, 2024November 2024 (2024-11) PSyclone delivered strong performance and reliability gains in the NEMOv5 track, focusing on OpenMP improvements, CI/test stability, and code quality. The work produced faster NEMOv5 runs, reproducible test outcomes, and maintainable code, enabling easier scaling of NEMOv5 adoption across the team.
Activity
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Quality Metrics
Correctness84.8%
Maintainability85.8%
Architecture79.0%
Performance74.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
BashDiffFortranJavaScriptMakefilePythonShellTextYAMLreStructuredText
Technical Skills
API DesignBenchmarkingBug FixingBuild AutomationBuild ConfigurationBuild System ConfigurationBuild System ManagementBuild SystemsCI/CDCLI DevelopmentClimate ModelingCode AnalysisCode CoverageCode ExclusionCode Formatting
Repositories Contributed To
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