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Jiya Zhang

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Jiya Zhang

Over a ten-month period, this developer enhanced GPU profiling and performance monitoring across openxla/xla, Intel-tensorflow/tensorflow, and ROCm/tensorflow-upstream by building robust CUPTI-based tracing, PM sampling integration, and configurable profiling options. They refactored C++ code to centralize callback logic, standardized GPU metrics naming, and improved error handling for profiling stability. Their work included implementing unit tests for XLA buffer allocation tracking, restoring activity tracing for CUDA 13.x, and aligning observability features across repositories. Leveraging C++, CUDA, and Python, they delivered features that improved profiling fidelity, resource utilization, and debugging efficiency, while ensuring maintainability and cross-platform consistency in complex ML stacks.

Overall Statistics

Feature vs Bugs

70%Features

Repository Contributions

30Total
Bugs
9
Commits
30
Features
21
Lines of code
2,003
Activity Months10

Work History

June 2026

2 Commits • 2 Features

Jun 1, 2026

June 2026 monthly summary focused on delivering robust unit test coverage for buffer proto handling within the XLA debug info manager across two major repositories, strengthening correctness, traceability, and debuggability of buffer allocations. The work enhances observability for performance work and reduces regression risk in allocation tracking.

May 2026

1 Commits

May 1, 2026

May 2026 monthly summary for Intel-tensorflow/xla: Restored activity tracing for CUDA 13.0+ concurrent kernels by reverting a deadlock patch. This brings back end-to-end observability, enabling faster debugging and performance tuning for CUDA 13.x workloads. Commit: 024db92f832c13d928776c1e6730101785b3ecc8 (Revert deadlock patch for 13.0+ CUDA; PiperOrigin-RevId: 910344576).

March 2026

2 Commits • 2 Features

Mar 1, 2026

March 2026 performance review: Focused on standardizing GPU performance metrics naming to improve profiling readability and tooling effectiveness across two high-impact repositories. Key deliverables include a GPU Performance Metrics Naming Utility in openxla/xla with integration into the collector to use mapped names (commit 47cd6a95777f6065f5ee4af0d4cc2519b5412bc3), and a GPU Performance Metrics Renaming Utility added to ROCm/tensorflow-upstream (commit 4db96ac0dfb44b7893314dd18a405b9c0d5513b4). Major bugs fixed: none explicitly tracked within this scope; the work reduces mislabeling friction by introducing a standard metrics mapping. Overall impact: improves GPU profiling readability, accelerates performance diagnosis, and enables more reliable analytics across both repos. Technologies/skills demonstrated: design and implementation of metrics mapping utilities, integration with existing collectors, cross-repo collaboration, and provenance tracking (PiperOrigin-RevId in commits).

December 2025

2 Commits • 2 Features

Dec 1, 2025

December 2025 monthly summary for developer contributions focused on profiling and observability enhancements across two repositories (ROCm/tensorflow-upstream and Intel-tensorflow/xla).

November 2025

3 Commits • 3 Features

Nov 1, 2025

Month: 2025-11 — Consolidated GPU profiling enhancements via XProf across ROCm/jax, Intel-tensorflow/xla, and ROCm/tensorflow-upstream. Focused on configurable per-task/per-chip profiling with robust input handling and safe defaults to ensure profiling adapts to available hardware and reduces overhead.

October 2025

3 Commits • 3 Features

Oct 1, 2025

Monthly summary for 2025-10 focused on expanding PM Sampling configurability across core ML backends to improve profiling fidelity and resource utilization. Delivered per-GPU memory buffer size options with validation and documentation across JAX, TensorFlow, and XLA, enabling dynamic tuning and better memory control for GPU profiling.

September 2025

6 Commits • 3 Features

Sep 1, 2025

September 2025 focused on enabling GPU Performance Monitoring (PM) sampling across core ML stacks (JAX, TensorFlow, XLA profilers), with integration tests and docs updates, plus improvements to configurability and error propagation. CI stability work was performed by temporarily disabling GPU PM sampling tests due to privileged access constraints. The work delivers deeper third-party profiling, stronger error handling, and clearer operational guidance for performance optimization.

August 2025

3 Commits • 3 Features

Aug 1, 2025

Executive monthly summary for 2025-08 focusing on GPU PM sampling integration into Xplane/Trace Viewer across openxla/xla, Intel-tensorflow/tensorflow, and ROCm/tensorflow-upstream. Delivered end-to-end performance monitoring capabilities enabling precise GPU profiling, metrics collection, and visualization across platforms. Key build/source updates, data structures, and CUPTI/tracer enhancements improve cross-repo consistency and performance debugging efficiency, delivering business value by accelerating performance optimization and visibility.

July 2025

3 Commits

Jul 1, 2025

Monthly summary for 2025-07: Delivered targeted GPU occupancy reliability fixes across multiple repos, improving accuracy of occupancy statistics for compute capability 7.0+ GPUs and aligning dynamic shared memory handling with vendor recommendations. These changes enable more reliable kernel performance tuning and better resource utilization, contributing to predictable performance and faster optimization cycles.

June 2025

5 Commits • 3 Features

Jun 1, 2025

June 2025 monthly summary: Delivered centralized CUPTI callback IDs via CreateDefaultCallbackIds across ROCm/xla and openxla/xla, refactored CUPTI tracing logic in cupti_tracer across ROCm/tensorflow-upstream, and implemented a robust GPU profiling stability fix to avoid deadlocks with CONCURRENT_KERNEL tracing (NVIDIA bug). These changes improved maintainability, reduced profiling overhead, and enhanced data collection reliability for performance optimization.

Activity

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Quality Metrics

Correctness90.0%
Maintainability86.6%
Architecture87.6%
Performance83.4%
AI Usage21.4%

Skills & Technologies

Programming Languages

BazelC++MarkdownPython

Technical Skills

BazelBuild System ConfigurationC++C++ DevelopmentC++ developmentCI/CDCUDACUPTICUPTI APICode RefactoringDocumentationError HandlingGPU ComputingGPU ProfilingGPU Programming

Repositories Contributed To

7 repos

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

openxla/xla

Jun 2025 Jun 2026
7 Months active

Languages Used

C++

Technical Skills

C++CUDAGPU ProfilingPerformance AnalysisPerformance OptimizationGPU Programming

ROCm/tensorflow-upstream

Jun 2025 Mar 2026
6 Months active

Languages Used

C++

Technical Skills

C++ developmentCUDAGPU ProgrammingGPU programmingPerformance Profilingperformance profiling

Intel-tensorflow/tensorflow

Jul 2025 Jun 2026
5 Months active

Languages Used

C++

Technical Skills

C++GPU programmingPerformance optimizationC++ DevelopmentGPU ProgrammingPerformance Profiling

jax-ml/jax

Sep 2025 Oct 2025
2 Months active

Languages Used

BazelMarkdownPython

Technical Skills

BazelCI/CDDocumentationGPU ComputingPerformance ProfilingPython

Intel-tensorflow/xla

Nov 2025 May 2026
3 Months active

Languages Used

C++

Technical Skills

C++ DevelopmentGPU ProgrammingPerformance ProfilingC++ developmentperformance profilingsystem optimization

ROCm/xla

Jun 2025 Jun 2025
1 Month active

Languages Used

C++

Technical Skills

CUPTI APICode RefactoringGPU Profiling

ROCm/jax

Nov 2025 Nov 2025
1 Month active

Languages Used

Markdown

Technical Skills

GPU programmingdocumentationprofiling