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Youngsung Kim

PROFILE

Youngsung Kim

Worked on the E3SM-Project/E3SM repository, focusing on build system configuration and environment management for high-performance computing workloads on the Frontier platform. Over four months, delivered features that unified and simplified machine and compiler configurations, improved runtime reliability, and enhanced compatibility with Linux OS and AMD compilers. Addressed build and job submission issues by refining linker flags, standardizing module loading, and implementing ROCm workarounds. Used CMake, Fortran, and shell scripting to streamline toolchains, reduce configuration drift, and lower maintenance overhead. The work resulted in more robust, reproducible builds and improved workflow stability for scientific computing on HPC systems.

Overall Statistics

Feature vs Bugs

75%Features

Repository Contributions

11Total
Bugs
2
Commits
11
Features
6
Lines of code
744
Activity Months6

Your Network

108 people

Shared Repositories

108
Abhishek BagusettyMember
Erin ThomasMember
Erin ThomasMember
Oscar Diaz-IbarraMember
Andrew RobertsMember
Andrew RobertsMember
Alexander HagerMember
Andrew M. BradleyMember
Andrew M. BradleyMember

Work History

March 2026

1 Commits • 1 Features

Mar 1, 2026

Month: 2026-03; Focused on delivering a Frontier environment upgrade to improve compatibility and performance for the E3SM project. Key work: updating frontier software versions (compilers and libraries) to March 2026 baseline, enabling smoother builds, better runtime stability, and performance gains.

November 2025

1 Commits • 1 Features

Nov 1, 2025

Monthly summary for 2025-11: Focused on Frontier build system optimization for the E3SM project. Implemented a toolchain update on Frontier by loading gcc-native/12.3 and removing the libunwind module, improving build compatibility and performance. Related to issue #7886 and linked to commit 6e1e33369266a2755c4bca2463425b3a337aeeb9.

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for the E3SM repository focused on build-system simplification for Frontier by removing craygnu-hipcc compiler configuration, reducing toolchain surface area, and decreasing maintenance effort. The change clarifies supported toolchains, lowers risk of configuration drift, and improves build reliability. Commit f2c65a2d28a8e651ea8f8de5767ed8303d04269b: Removed craygnu-hipcc compiler on Frontier.

March 2025

3 Commits • 1 Features

Mar 1, 2025

In March 2025, delivered two high-impact contributions to the E3SM project that strengthen Frontier workloads and overall platform reliability. Feature work focused on Frontier environment compatibility, while a bug fix addressed ROCm-related issues affecting Frontier runs. These efforts improved usability, stability, and maintainability for users and developers.

February 2025

3 Commits • 1 Features

Feb 1, 2025

February 2025 monthly summary for E3SM project: Frontier machine configuration unification and standardized compiler naming across E3SM and Scream, with updates to provenance and CMake to reflect the unified machine. Implemented job submission and build stability improvements on Frontier, including fixes to srun arguments and restoration of sbatch arguments with Depends files to resolve compiler/version and library dependencies. Result: reduced user friction, improved reproducibility, and more robust build/run reliability. Demonstrated strength in CMake configuration, provenance management, and scheduler integration.

November 2024

2 Commits • 1 Features

Nov 1, 2024

November 2024 monthly summary for E3SM-Project/E3SM. Delivered Frontier system build and configuration enhancements to improve reliability and runtime, including enabling PIO tools, ADIOS support, and GPU offloading in machine/compiler configs. Resolved build-time errors by refining linker flags and NOOPT_FILES to ensure successful compilation and execution. Major commits include d4b7f47bb6386213c0603ecb6a39b22ff2db1d24 and 71b1a350fca3e7c96f0480e2bdea39af85f91e11.

Activity

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Quality Metrics

Correctness85.4%
Maintainability85.4%
Architecture81.8%
Performance71.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

C++CMakeFortranPythonShellXMLcmakefortran

Technical Skills

Build System ConfigurationBuild SystemsCompiler ConfigurationCompiler Flags ManagementConfiguration ManagementEnvironment ManagementFortran ProgrammingHPC ConfigurationHPC Environment SetupHigh-Performance ComputingHigh-Performance Computing (HPC)Scientific ComputingSoftware IntegrationSystem Administrationbuild management

Repositories Contributed To

1 repo

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

E3SM-Project/E3SM

Nov 2024 Mar 2026
6 Months active

Languages Used

CMakeFortranPythonShellcmakefortranC++XML

Technical Skills

Build System ConfigurationCompiler ConfigurationHPC Environment SetupBuild SystemsCompiler Flags ManagementConfiguration Management