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Xuefei Jiang

PROFILE

Xuefei Jiang

Xuefei Jiang developed and optimized GPU computing features across major machine learning repositories, including tensorflow/tensorflow and openxla/xla. He engineered dynamic device attribute querying and refined ROCm device detection, improving hardware compatibility and performance planning. Leveraging C++ and CUDA, he implemented ROCm-accelerated scaled dot product support and enhanced autotuning for matrix multiplication, enabling efficient large-scale operations on AMD GPUs. Jiang also stabilized CI pipelines by refining test suites and memory management, reducing flakiness and improving feedback cycles. His work demonstrated depth in low-level programming, system integration, and performance optimization, delivering robust, scalable solutions for ROCm-enabled machine learning workflows.

Overall Statistics

Feature vs Bugs

69%Features

Repository Contributions

20Total
Bugs
5
Commits
20
Features
11
Lines of code
2,644
Activity Months10

Work History

April 2026

1 Commits • 1 Features

Apr 1, 2026

April 2026 (2026-04) performance-focused month for openxla/xla. Key accomplishment: test suite performance optimization by removing the 'long' timeout flag in ROCm-enabled tests after hipblaslt update, leading to faster test execution and more reliable CI. This work reduced overall CI time and improved feedback cycles, enabling faster iteration on GPU backends.

March 2026

2 Commits • 2 Features

Mar 1, 2026

March 2026: Delivered ROCm-accelerated scaled dot product support via hipBLASLt for two major backends (Intel-tensorflow/tensorflow and openxla/xla). Implemented end-to-end path from fusion to a custom hipBLASLt matmul call, enhanced autotuner to recognize kScaledDot, and extended GEMM configuration with ScaleMode to manage scale attributes across data types. Built infrastructure for custom calls and thunk emission, and added comprehensive tests. This work unlocks scalable, efficient matrix multiplications on ROCm hardware and lays the groundwork for FP8-scaled dot performance improvements, delivering tangible performance and usability gains for ML workloads.

December 2025

2 Commits • 1 Features

Dec 1, 2025

December 2025 (jax-ml/jax): Delivered ROCm platform support for the scaled matrix multiplication lowering path, enabling ROCm-based acceleration for the scaled dot product workflow. Implemented ROCm registration in the block_scaled_dot lowering path and completed accompanying updates to the scaling workflow, laying groundwork for AMD GPU performance improvements and broader hardware parity.

October 2025

1 Commits • 1 Features

Oct 1, 2025

Month 2025-10: Delivered dynamic ROCm device attribute querying in the TensorFlow integration to replace hardcoded device attributes with runtime queries, improving accuracy of device descriptions and configurations across ROCm platforms. This work (PR #31386, commit b91355e4fd4288870a7a0cb775a5375ccca3a040) fixes hardcoded properties for ROCm and enhances hardware compatibility and scalability within TensorFlow.

September 2025

2 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for tensorflow/tensorflow focused on ROCm platform improvements. Deliveries centered on memory reporting reliability and multi-GPU scalability for ROCm, with upstream contributions and targeted testing to support robust ROCm deployments.

August 2025

1 Commits

Aug 1, 2025

August 2025 monthly summary focusing on stabilizing the TensorFlow test suite for single-GPU workflows by excluding multi-GPU tagged tests, delivering faster, more reliable CI feedback and reducing flaky test outcomes. This work improves CI efficiency, resource utilization, and supports more stable ROCm-enabled releases.

July 2025

1 Commits • 1 Features

Jul 1, 2025

Month: 2025-07 | TensorFlow (tensorflow/tensorflow) Scope: ROCm device description and feature detection improvements to improve accuracy and maintainability of ROCm GPU support, enabling safer performance optimization for ML workloads on ROCm devices. Key accomplishments: - Separated ROCm gfx9_mi300 and gfx9_mi350 checks to improve accuracy of device feature detection. - Refined the ROCm device description logic for clarity and maintainability, reducing future regression risk. - Implemented and merged PR #28936 (commit 6ed8d8853e2b121288633058d7f0e681247f756b): clean device description for rocm, delivering a precise and reliable feature map. - Enhanced reliability of device capability mapping, enabling more consistent performance optimization decisions for TensorFlow on ROCm hardware. Overall impact: - Improved reliability and performance planning for ROCm-based ML workloads; cleaner codebase supports faster onboarding and future enhancements. Technologies/skills demonstrated: - ROCm/HIP integration, GPU feature detection logic, code refactor for maintainability, PR-driven collaboration, and Git-based change management.

May 2025

1 Commits • 1 Features

May 1, 2025

May 2025 - TensorFlow (tensorflow/tensorflow): Focused on ROCm HIPBLAS LT performance and memory optimization. Delivered GFX942 workspace size optimization to improve performance and memory utilization for gfx942 GPUs. The change, implemented in commit dacaac380a338060d3bc95f5f8d9cf1a7180474e and merged as PR #26762, reduces workspace allocation overhead and stabilizes throughput for HIPBLAS LT workloads. No major bugs observed related to this work; the effort centers on performance uplift and resource efficiency aligning with ML workloads on ROCm-enabled GPUs. Technologies demonstrated include HIP/ROCm, hipblaslt, GPU memory management, and PR-driven development.

April 2025

8 Commits • 2 Features

Apr 1, 2025

April 2025 Performance Summary: Delivered FP8 readiness and stability improvements across ROCm/xla and ROCm/tensorflow-upstream, with a focus on business value through enhanced throughput, reliable CI, and smoother development cycles.

January 2025

1 Commits • 1 Features

Jan 1, 2025

January 2025 monthly summary for ROCm/xla focused on expanding hardware support for AMD GPUs and ensuring robust integration with the XLA compiler. The primary deliverable this month was enabling support for gfx1200 and gfx1201 architectures within ROCm's XLA path, including related hipblaslt and FP8 support, and ensuring proper identification and utilization of these new GPUs.

Activity

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Quality Metrics

Correctness92.6%
Maintainability90.0%
Architecture90.6%
Performance88.0%
AI Usage23.0%

Skills & Technologies

Programming Languages

BUILDC++PythonShell

Technical Skills

Build System ConfigurationC++C++ developmentCI/CDCUDACompiler DevelopmentCompiler TestingDevOpsDevice driver developmentDriver integrationFP8 Data TypesGPU ComputingGPU computingGPU programmingHigh-Performance Computing

Repositories Contributed To

6 repos

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

tensorflow/tensorflow

May 2025 Oct 2025
5 Months active

Languages Used

C++Shell

Technical Skills

CUDAGPU programmingPerformance optimizationC++ developmentDevice driver developmentCI/CD

ROCm/xla

Jan 2025 Apr 2025
2 Months active

Languages Used

C++

Technical Skills

Driver integrationGPU computingLow-level programmingC++CUDACompiler Development

ROCm/tensorflow-upstream

Apr 2025 Apr 2025
1 Month active

Languages Used

BUILDC++

Technical Skills

Build System ConfigurationCUDACompiler TestingGPU ComputingROCmTesting

jax-ml/jax

Dec 2025 Dec 2025
1 Month active

Languages Used

Python

Technical Skills

CUDAGPU programmingMachine LearningNumerical ComputingROCm

openxla/xla

Mar 2026 Apr 2026
2 Months active

Languages Used

C++

Technical Skills

CUDAGPU programmingMatrix multiplicationPerformance optimizationTesting

Intel-tensorflow/tensorflow

Mar 2026 Mar 2026
1 Month active

Languages Used

C++

Technical Skills

CUDAGPU programmingMatrix operationsPerformance optimization