Samsung/ONE
Dec 2024 – Apr 2026
10 Months active
Languages Used
C++CMakeShellYAML
Technical Skills
C++C++ DevelopmentCode RefactoringEmbedded SystemsKernel DevelopmentNamespace Management
chunseoklee
PROFILE
Chunseoklee
Over ten months, contributed to Samsung/ONE by developing and optimizing core features for the onert-micro runtime, focusing on kernel development, memory management, and CI/CD reliability. Leveraging C++, CMake, and YAML, delivered new tensor operations such as SelectV2, BatchMatMul, and reduction kernels, while enhancing error handling and logging for production stability. Addressed security and reliability by implementing robust index validation and overflow-safe memory calculations, and improved build infrastructure for ARM targets and CI workflows. Refactored code for maintainability, expanded model compatibility, and ensured rigorous testing, resulting in a more scalable, secure, and efficient embedded machine learning platform.
Overall Statistics
Feature vs Bugs
65%Features
Repository Contributions
25Total
Bugs
8
Commits
25
Features
15
Lines of code
47,754
Activity Months10
Your Network
219 peopleWork History
April 2026
1 Commits
Apr 1, 2026April 2026: Delivered a robust Tensor memory size overflow prevention patch for Samsung/ONE, hardening memory calculations for large tensors. Migrated memory sizing from int32_t to int64_t, added overflow checks, and switched to large_num_elements() with a safe cast to size_t. This work reduces risk of allocation errors, enables larger models and batch sizes, and improves runtime reliability. Affected areas include BuddyMemoryManager and kernels ExpandDims, If, Reshape, and TransposeConv, ensuring consistent memory behavior across critical paths.
1 Commits
Apr 1, 2026April 2026: Delivered a robust Tensor memory size overflow prevention patch for Samsung/ONE, hardening memory calculations for large tensors. Migrated memory sizing from int32_t to int64_t, added overflow checks, and switched to large_num_elements() with a safe cast to size_t. This work reduces risk of allocation errors, enables larger models and batch sizes, and improves runtime reliability. Affected areas include BuddyMemoryManager and kernels ExpandDims, If, Reshape, and TransposeConv, ensuring consistent memory behavior across critical paths.
April 2026
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026: Implemented critical safety enhancements in Samsung/ONE by adding robust index bounds checks and error handling for tensor operations. Introduced an IndexError enum and updated GatherND, Slice, Pad, and dimension product calculations to prevent out-of-bounds accesses and negative indices, addressing security vulnerabilities related to index validation. The work improves runtime reliability for production models and downstream integrations. Commit b2f7ae196af4b002b77259b525d3f0f8f7925122 documents the changes and sign-off (ONE-DCO-1.0).
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026: Implemented critical safety enhancements in Samsung/ONE by adding robust index bounds checks and error handling for tensor operations. Introduced an IndexError enum and updated GatherND, Slice, Pad, and dimension product calculations to prevent out-of-bounds accesses and negative indices, addressing security vulnerabilities related to index validation. The work improves runtime reliability for production models and downstream integrations. Commit b2f7ae196af4b002b77259b525d3f0f8f7925122 documents the changes and sign-off (ONE-DCO-1.0).
October 2025
3 Commits • 3 Features
Oct 1, 2025Month: 2025-10 — Samsung/ONE contributions focused on Onert-Micro, with an emphasis on CI validation, schema compatibility, and logging standardization. Achievements include ARM CI build validation for Onert-Micro, FlatBuffers schema generation updates for micro compatibility with newer tooling, and standardized error handling via a new OMLog.h and OM_LOG_AND_RETURN macro. A small but important fix to OMRuntimeAllocator.cpp loop counter type was also completed to ensure correctness in the ARM target validation flow.
3 Commits • 3 Features
Oct 1, 2025Month: 2025-10 — Samsung/ONE contributions focused on Onert-Micro, with an emphasis on CI validation, schema compatibility, and logging standardization. Achievements include ARM CI build validation for Onert-Micro, FlatBuffers schema generation updates for micro compatibility with newer tooling, and standardized error handling via a new OMLog.h and OM_LOG_AND_RETURN macro. A small but important fix to OMRuntimeAllocator.cpp loop counter type was also completed to ensure correctness in the ARM target validation flow.
October 2025
September 2025
4 Commits • 2 Features
Sep 1, 2025Monthly summary for 2025-09 (Samsung/ONE). This period focused on core kernel improvements, stability fixes in onert-micro, and ARM-target build optimizations. Key outcomes include a maintainable and multi-type capable ReduceMax kernel, stabilization work for dynamic shapes handling in the Fully Connected kernel (onert-micro), and build efficiency and reliability enhancements for the ARM target. The work contributes to better performance, reduced resource usage, and more robust platform builds, with positive impact on developer productivity and product stability.
September 2025
4 Commits • 2 Features
Sep 1, 2025Monthly summary for 2025-09 (Samsung/ONE). This period focused on core kernel improvements, stability fixes in onert-micro, and ARM-target build optimizations. Key outcomes include a maintainable and multi-type capable ReduceMax kernel, stabilization work for dynamic shapes handling in the Fully Connected kernel (onert-micro), and build efficiency and reliability enhancements for the ARM target. The work contributes to better performance, reduced resource usage, and more robust platform builds, with positive impact on developer productivity and product stability.
August 2025
4 Commits • 3 Features
Aug 1, 2025In August 2025, the onert-micro component of Samsung/ONE delivered targeted CLI enhancements, performance optimization for 4D tensor reductions, and a new batched operation, driving robustness, efficiency, and scalability for production workloads.
4 Commits • 3 Features
Aug 1, 2025In August 2025, the onert-micro component of Samsung/ONE delivered targeted CLI enhancements, performance optimization for 4D tensor reductions, and a new batched operation, driving robustness, efficiency, and scalability for production workloads.
August 2025
April 2025
1 Commits
Apr 1, 2025April 2025: CI stability enhancement for Samsung/ONE by updating the onert-micro unit test runner to Ubuntu 22.04, addressing the Ubuntu 20.04 deprecation and ensuring tests run on a supported environment. Change implemented via commit 8501fce133ecf7cd0d5437a13aef36c7aadf5aa5. This reduces CI flakiness, improves test reliability, and positions the project for smoother future updates.
April 2025
1 Commits
Apr 1, 2025April 2025: CI stability enhancement for Samsung/ONE by updating the onert-micro unit test runner to Ubuntu 22.04, addressing the Ubuntu 20.04 deprecation and ensuring tests run on a supported environment. Change implemented via commit 8501fce133ecf7cd0d5437a13aef36c7aadf5aa5. This reduces CI flakiness, improves test reliability, and positions the project for smoother future updates.
March 2025
1 Commits
Mar 1, 2025March 2025 monthly wrap-up for Samsung/ONE: Focused on ONERT compiler shape validation improvements for Gather to expand compatibility with higher-rank inputs, along with targeted regression testing. The change enhances robustness and model coverage, reduces runtime shape errors, and aligns with business goals to support a broader set of models.
1 Commits
Mar 1, 2025March 2025 monthly wrap-up for Samsung/ONE: Focused on ONERT compiler shape validation improvements for Gather to expand compatibility with higher-rank inputs, along with targeted regression testing. The change enhances robustness and model coverage, reduces runtime shape errors, and aligns with business goals to support a broader set of models.
March 2025
February 2025
5 Commits • 3 Features
Feb 1, 2025February 2025: Focused on stability, performance, and expanding onert-micro functionality within Samsung/ONE. Implemented critical fixes for ASan-based dynamic loading, selectively disabling incompatible backends on Tizen, and delivered core micro-ops enabling ReducedProd, Mean, and Sum for onert-micro with tests and kernel/loading support. Resulted in improved stability on ASan builds, broader device coverage, and measurable improvements for micro-workloads.
February 2025
5 Commits • 3 Features
Feb 1, 2025February 2025: Focused on stability, performance, and expanding onert-micro functionality within Samsung/ONE. Implemented critical fixes for ASan-based dynamic loading, selectively disabling incompatible backends on Tizen, and delivered core micro-ops enabling ReducedProd, Mean, and Sum for onert-micro with tests and kernel/loading support. Resulted in improved stability on ASan builds, broader device coverage, and measurable improvements for micro-workloads.
January 2025
1 Commits • 1 Features
Jan 1, 2025In Jan 2025, delivered the SelectV2 operation for onert-micro in Samsung/ONE, adding a kernel, headers, and tests for float data types to enable conditional element selection from two input tensors based on a boolean condition tensor. This work expands on-device inference capabilities and strengthens runtime flexibility for micro-runtime workloads.
1 Commits • 1 Features
Jan 1, 2025In Jan 2025, delivered the SelectV2 operation for onert-micro in Samsung/ONE, adding a kernel, headers, and tests for float data types to enable conditional element selection from two input tensors based on a boolean condition tensor. This work expands on-device inference capabilities and strengthens runtime flexibility for micro-runtime workloads.
January 2025
December 2024
4 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for Samsung/ONE focusing on micro-runtime contributions and code quality improvements. Key enhancements include enabling the Shape operator in onert-micro, adding ZerosLike support for Float and INT32 with tests, and namespace correctness fixes across onert-micro import and execution kernels. These work items broaden model compatibility, improve kernel build reliability, and strengthen code organization, accelerating feature delivery and reducing maintenance risk.
December 2024
4 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for Samsung/ONE focusing on micro-runtime contributions and code quality improvements. Key enhancements include enabling the Shape operator in onert-micro, adding ZerosLike support for Float and INT32 with tests, and namespace correctness fixes across onert-micro import and execution kernels. These work items broaden model compatibility, improve kernel build reliability, and strengthen code organization, accelerating feature delivery and reducing maintenance risk.
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Quality Metrics
Correctness89.2%
Maintainability87.2%
Architecture85.6%
Performance78.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++CMakeShellYAML
Technical Skills
Build SystemBuild System ConfigurationBuild SystemsC++C++ DevelopmentC++ developmentC++ programmingCI/CDCMakeCode RefactoringCommand Line Argument ParsingCompiler DevelopmentDebuggingDriver DevelopmentEmbedded Systems
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