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Bruno Mazzotti

PROFILE

Bruno Mazzotti

Bruno Mazzotti developed and optimized deep learning features across ROCm/TransformerEngine and ROCm/aiter, focusing on kernel development, performance tuning, and CI/CD automation. He integrated and enhanced RMSNorm and LayerNorm kernels with FP8 support, implemented Group Matrix Multiplication and attention sink features, and improved positional encoding for transformer workloads. Using Python, C++, and CUDA, Bruno delivered robust test automation, benchmarking, and dynamic test selection tooling, while refining dependency management and documentation. His work addressed hardware-specific challenges, improved training throughput and reliability, and strengthened CI pipelines, demonstrating depth in GPU programming, kernel optimization, and cross-repository collaboration for scalable machine learning solutions.

Overall Statistics

Feature vs Bugs

91%Features

Repository Contributions

12Total
Bugs
1
Commits
12
Features
10
Lines of code
10,166
Activity Months6

Work History

January 2026

3 Commits β€’ 1 Features

Jan 1, 2026

2026-01 Monthly Summary for ROCm/aiter: Delivered targeted test validation tooling and hardened CI, enabling faster feedback and more reliable validation workflows. Implemented a Python-based Triton Test Selection Script that dynamically selects tests based on code diffs, with a dry-run mode, refined JSON handling for kernel configurations, and updated documentation. Fixed CI behavior so non-zero exit codes from the test selection step no longer abort pipelines, reducing downtime and false negatives. Quality improvements include filtering out hard-to-track dependencies, avoiding misclassification of non-kernel files as kernels, and reducing warning noise, with corresponding README/docs updates. This work demonstrates strong scripting, config parsing, and CI/CD execution skills, delivering clear business value through reduced CI time and more stable validation.

December 2025

1 Commits β€’ 1 Features

Dec 1, 2025

December 2025 monthly summary for ROCm/aiter focused on delivering a high-impact feature to improve attention mechanisms in Triton MHA kernels, along with benchmark alignment and tolerance tuning to ensure performance and numerical stability across devices. The month prioritized feature delivery and performance improvements; there were no critical bug fixes reported in this data set.

November 2025

1 Commits β€’ 1 Features

Nov 1, 2025

November 2025: ROCm/aiter delivered a critical gfx950 data-path enhancement and security-focused CI improvements. This month focused on enabling gfx950 fp8_e4m3 data-type compatibility and hardening PR workflows in GitHub Actions to reduce risk and improve automation reliability.

October 2025

2 Commits β€’ 2 Features

Oct 1, 2025

October 2025: Delivered performance-focused features in ROCm/aiter to accelerate transformer workloads and improve scalability on ROCm hardware. Implemented Group Matrix Multiplication (GMM) with Triton kernels in AITER, including persistent and non-persistent TGMM variants, PyTorch wrappers, utilities, unit tests, and benchmarks to optimize grouped matmul patterns. Added Positional Encoding (PE) support for Triton-based multi-head attention kernels, updating forward/backward passes, kernels, unit tests, and benchmarks. Each feature includes dedicated tests and benchmarks to establish reliability and measure throughput. References: commits fc116095c6d0c34ddc588785ef1f4ab0a219b901 and 3945e926f3005f88fe6c4eb4974de25a685449f5. Impact: enhances transformer throughput and scalability, reduces operational overhead for grouped matmul, and lays the groundwork for broader adoption and future optimizations. Skills demonstrated: Triton kernel development, PyTorch integration, unit testing, performance benchmarking, and cross-team collaboration to deliver business-value features.

May 2025

3 Commits β€’ 3 Features

May 1, 2025

In May 2025, ROCm/TransformerEngine delivered a focused feature integration: LayerNorm support using ROCm Triton kernels with FP8 support and targeted backward-pass optimizations. The work also introduces new utility modules to improve code reuse, performance, and maintainability, laying groundwork for future FP8 workflows and broader ROCm kernel coverage.

April 2025

2 Commits β€’ 2 Features

Apr 1, 2025

April 2025 monthly summary focusing on RMSNorm-related work across ROCm/TransformerEngine and ROCm/triton. The month delivered cross-repo RMSNorm backward-pass enhancements, performance optimizations, and stability improvements that directly improve training throughput and reliability for transformer workloads on ROCm. Key outcomes include integration of rmsnorm_bwd with unit tests, addition of Triton sm_margin support, backward-pass kernel optimizations and argument handling refinements, and a critical segmentation fault fix in the standalone kernel launcher, complemented by tests and CLI improvements. These efforts reduce technical debt through code cleanup and demonstrate strong collaboration across repositories, delivering measurable business value through faster, more stable model training on ROCm.

Activity

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Quality Metrics

Correctness90.0%
Maintainability81.6%
Architecture85.8%
Performance85.8%
AI Usage31.6%

Skills & Technologies

Programming Languages

C++PythonShellYAML

Technical Skills

CI/CDCUDACUDA Kernel DevelopmentCommand Line InterfaceContinuous IntegrationDeep LearningDeep Learning OptimizationDependency managementDocumentationFP8 SupportGPU ComputingGPU programmingGitHub ActionsKernel DevelopmentLinear Algebra

Repositories Contributed To

3 repos

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

ROCm/aiter

Oct 2025 – Jan 2026
4 Months active

Languages Used

C++PythonYAMLShell

Technical Skills

CUDADeep LearningGPU ComputingKernel DevelopmentLinear AlgebraPerformance Optimization

ROCm/TransformerEngine

Apr 2025 – May 2025
2 Months active

Languages Used

C++Python

Technical Skills

CUDAOptimizationPyTorchROCmTestingTriton

ROCm/triton

Apr 2025 – Apr 2025
1 Month active

Languages Used

C++Python

Technical Skills

CUDA Kernel DevelopmentCommand Line InterfacePerformance OptimizationPyTorchTestingTriton