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Xiaochang Wu

PROFILE

Xiaochang Wu

Xiaochang Wu contributed to both the pytorch/pytorch and vllm-project/vllm-gaudi repositories, focusing on backend reliability and performance. In PyTorch, Xiaochang addressed graph partitioning consistency by refining the partitioner to ensure node order alignment with the original graph, reducing nondeterminism and improving reproducibility for distributed workloads. The work involved algorithm design, graph theory, and Python unit testing to validate stability across runs. In vllm-gaudi, Xiaochang implemented a profiling capability for the HPU model runner, enabling detailed performance analysis on Habana Gaudi hardware. This involved Python programming, model optimization, and backend development to support data-driven inference optimization.

Overall Statistics

Feature vs Bugs

25%Features

Repository Contributions

4Total
Bugs
3
Commits
4
Features
1
Lines of code
210
Activity Months4

Work History

January 2026

1 Commits • 1 Features

Jan 1, 2026

Month: 2026-01 | Repository: vllm-gaudi – Focused on delivering profiling capability for the HPU model runner within the vllm-gaudi path. Emphasized business value through improved performance visibility, enabling data-driven optimizations for large-scale inference on Habana Gaudi hardware.

November 2025

1 Commits

Nov 1, 2025

November 2025: Focused on code quality and maintainability for vllm-gaudi. Performed targeted cleanup by removing an unused feature (VLLM_DELAYED_SAMPLING) to reduce code complexity and potential misconfigurations. This aligns with the project’s maintenance strategy and keeps the codebase lean for upcoming iterations.

August 2025

1 Commits

Aug 1, 2025

Concise monthly summary for 2025-08 focused on delivering a critical graph partitioning reliability fix in the PyTorch repository, with emphasis on business value and technical achievement.

July 2025

1 Commits

Jul 1, 2025

July 2025 monthly summary for pytorch/pytorch focusing on Graph Partitioning reliability improvements and test coverage. Delivered an order-consistency fix for the partitioner to align partitioned graph node order with the original graph and added regression tests to ensure stability across runs and after partitioning. This reduces flaky behavior and improves reproducibility of graph partitioning workflows.

Activity

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Quality Metrics

Correctness95.0%
Maintainability85.0%
Architecture85.0%
Performance85.0%
AI Usage30.0%

Skills & Technologies

Programming Languages

Python

Technical Skills

Machine LearningModel OptimizationProfilingPythonPython programmingalgorithm designbackend developmentgraph theoryunit testing

Repositories Contributed To

2 repos

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

pytorch/pytorch

Jul 2025 Aug 2025
2 Months active

Languages Used

Python

Technical Skills

algorithm designgraph theoryunit testingPython programming

vllm-project/vllm-gaudi

Nov 2025 Jan 2026
2 Months active

Languages Used

Python

Technical Skills

Pythonbackend developmentMachine LearningModel OptimizationProfiling