EXCEEDS logo
Exceeds
Pierre GRANGER

PROFILE

Pierre Granger

Worked across DUNE/dunesim, DUNE/MaCh3_DUNE, mach3-software/MaCh3, and DUNE/duneana repositories to deliver reliability improvements, performance optimizations, and new analysis capabilities. Addressed simulation accuracy in dunesim by correcting active volume definitions and fiducial cut handling using C++ and configuration management. Enhanced MaCh3_DUNE build stability and data representation through CMake and YAML adjustments. Optimized GPU spline evaluation in MaCh3 by refactoring CUDA code to reduce memory bottlenecks, improving throughput for scientific computing workloads. Introduced a Region of Interest analysis module in duneana, enabling ROI-centric data handling and output generation. Demonstrated strengths in C++, parallel computing, and software refactoring.

Overall Statistics

Feature vs Bugs

33%Features

Repository Contributions

6Total
Bugs
4
Commits
6
Features
2
Lines of code
48,316
Activity Months4

Your Network

71 people

Shared Repositories

71
Pierre GrangerMember
Jude MartinMember
Daniel BarrowMember
Leonidas Aliaga SoplinMember
Daniel BarrowMember
mantheysMember
Dom BrailsfordMember
Kamil SkwarczynskiMember
Henry WallaceMember

Work History

February 2026

2 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary focusing on delivering business value and technical excellence across mach3-software/MaCh3 and DUNE/duneana. Key outcomes include reliability improvements in spline event handling and the introduction of an ROI analysis module for DUNE to accelerate data-driven insights. These efforts reduce downstream debugging, improve accuracy of spline event processing, and enable ROI-centric tracking and output generation for physics analyses.

January 2026

1 Commits • 1 Features

Jan 1, 2026

Month: 2026-01 — Summary: Delivered a key performance optimization for the GPU spline path in MaCh3. Replaced shared memory usage with local variables in the GPU spline evaluation code, reducing memory access bottlenecks and improving throughput for spline computations in rendering workloads. The change is recorded in commit d09bb1dd5b8b0baaee4ef28b80aaf912c4e62951.

December 2024

2 Commits

Dec 1, 2024

December 2024 — DUNE/MaCh3_DUNE: No new user-facing features delivered. Focused on reliability and analysis readiness through two critical bug fixes. Key results include: 1) Build stability and correct data representation for a mode in StructsDUNE.h via CMakeLists.txt adjustments; 2) Baseline uncertainty handling adjustment in OscCov_PDG2021_v2.yaml by updating the Detector ID's Error parameter. Commits: c2b836f17bf86d6a71abe28bef97dcb2aaf1e81e (Minor fixes); b87f651b7f45747ec633ecea0e52064ea410f467 (No prior on baseline). Impact: more reliable builds, accurate data representation, and improved downstream analyses; enhanced reproducibility and auditability through explicit commits. Technologies/skills demonstrated: CMake/build configuration, C++, data representation discipline, YAML configuration, and version control.

November 2024

1 Commits

Nov 1, 2024

November 2024 (2024-11) monthly summary for DUNE/dunesim: Implemented a critical fix to the fiducial cut and active volume ordering in dune_fdvd_genie_atmo_max_weighted_honda, correcting the mbox parameter handling and ensuring generation ranges align with fiducial criteria. This patch mitigates mis-specified active volumes, improves simulation reliability, and reduces downstream processing discrepancies. The change was reviewed and committed (7250da670c602f7e1f42613e0d5d2bdedaa67a32) and validated with targeted tests. Ready for production runs.

Activity

Loading activity data...

Quality Metrics

Correctness83.4%
Maintainability86.6%
Architecture76.6%
Performance80.0%
AI Usage23.4%

Skills & Technologies

Programming Languages

C++CMakeCUDAFCLYAML

Technical Skills

Build System ConfigurationC++ DevelopmentC++ developmentConfiguration ManagementData analysisGPU programmingParallel computingPerformance optimizationScientific computingSoftware engineeringdata handlingsoftware refactoring

Repositories Contributed To

4 repos

Overview of all repositories you've contributed to across your timeline

DUNE/MaCh3_DUNE

Dec 2024 Dec 2024
1 Month active

Languages Used

C++CMakeYAML

Technical Skills

Build System ConfigurationC++ DevelopmentConfiguration Management

mach3-software/MaCh3

Jan 2026 Feb 2026
2 Months active

Languages Used

CUDAC++

Technical Skills

GPU programmingParallel computingPerformance optimizationC++ developmentdata handlingsoftware refactoring

DUNE/dunesim

Nov 2024 Nov 2024
1 Month active

Languages Used

FCL

Technical Skills

Configuration Management

DUNE/duneana

Feb 2026 Feb 2026
1 Month active

Languages Used

C++CMake

Technical Skills

C++ developmentData analysisScientific computingSoftware engineering