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Hariharan Seshadri

PROFILE

Hariharan Seshadri

Shariharan contributed to ONNX Runtime and related repositories by developing and optimizing machine learning inference kernels, focusing on cross-platform performance and reliability. In CodeLinaro/onnxruntime, he implemented multithreading and ARM64 NEON optimizations for convolution workloads, removing bottlenecks like Im2Col and improving throughput. His work in intel/onnxruntime included enabling 8-bit and FP4 quantization, enhancing test infrastructure, and supporting distributed TopK selection for large vocabularies. He stabilized build systems in ROCm/onnxruntime by refining CMake configurations and improving CI/CD reliability. Shariharan’s engineering leveraged C++, CUDA, and CMake, demonstrating depth in algorithm optimization, quantization, and cross-platform kernel development.

Overall Statistics

Feature vs Bugs

53%Features

Repository Contributions

21Total
Bugs
7
Commits
21
Features
8
Lines of code
6,613
Activity Months5

Work History

January 2026

4 Commits • 2 Features

Jan 1, 2026

Performance and reliability-focused month delivering ARM64 inference optimizations and CI improvements. Key accomplishments included optimized ML inference kernel path, added a dedicated depthwise convolution kernel for ARM64 NEON, removal of the Im2Col step, and CI/CD enhancements that fix Android Emulator warnings and extend iOS simulator timeout, resulting in higher throughput and more reliable builds.

December 2025

1 Commits

Dec 1, 2025

December 2025: ROCm/onnxruntime build-system stabilization focused on the CMake configuration that underpinned interdependent patches. Reverted the changes to the CMake setup to restore a reliable baseline for packaging, CI, and inference examples, while maintaining ongoing tracking of related issues for a future root-cause fix. This work reduced build churn and risk to release pipelines, and established a solid foundation for subsequent improvements.

October 2025

1 Commits • 1 Features

Oct 1, 2025

October 2025 performance-focused update for CodeLinaro/onnxruntime. Delivered multithreading optimization for MlasConv ExpandThenGemmSegmented, improving CPU utilization and throughput for convolution workloads, and prepared groundwork for scalable batch/group based partitioning. No major bugs fixed this month; ongoing work targets reliability and performance under varied batch sizes.

September 2025

12 Commits • 4 Features

Sep 1, 2025

September 2025 outcomes focused on cross-platform runtime enhancements, edge-optimized kernels, and reliability improvements across ONNX Runtime and GenAI. Delivered FP4 support with broad CUDA/Windows compatibility, introduced ARM64 8-bit GEMM weights, added ARM NCHWc build option for better multi-core throughput, and rolled out a distributed TopK kernel for GenAI to scale large vocabularies. Implemented critical CI and test stability fixes to reduce build flakiness and improve CI feedback loops.

June 2025

3 Commits • 1 Features

Jun 1, 2025

June 2025 monthly summary for intel/onnxruntime focusing on XNNPACK Matmul reliability enhancements, 8-bit quantization support, and test infrastructure improvements. Delivered concrete fixes and feature enablement that improve correctness, performance readiness, and test coverage across CPU builds, paving the way for broader quantized inference in production.

Activity

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Quality Metrics

Correctness93.8%
Maintainability87.6%
Architecture90.0%
Performance92.4%
AI Usage35.2%

Skills & Technologies

Programming Languages

C++CMakeCUDAPythonShellYAML

Technical Skills

ARM developmentARM64 developmentAlgorithm OptimizationBenchmarkingBuild ConfigurationBuild SystemsC++C++ DevelopmentC++ developmentCI/CDCMakeCPU kernel developmentCUDACUDA programmingCross-Platform Development

Repositories Contributed To

4 repos

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

intel/onnxruntime

Jun 2025 Sep 2025
2 Months active

Languages Used

C++CMakePythonShell

Technical Skills

C++C++ developmentSoftware testingUnit testingalgorithm optimizationmachine learning

CodeLinaro/onnxruntime

Oct 2025 Jan 2026
2 Months active

Languages Used

C++YAML

Technical Skills

C++Deep LearningMachine LearningMultithreadingPerformance OptimizationARM development

microsoft/onnxruntime-genai

Sep 2025 Sep 2025
1 Month active

Languages Used

C++CUDA

Technical Skills

Algorithm OptimizationCUDACUDA programmingGPU ProgrammingGPU computingParallel computing

ROCm/onnxruntime

Dec 2025 Dec 2025
1 Month active

Languages Used

Shell

Technical Skills

CI/CDDevOpsShell Scripting

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