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Vivek Khandelwal

PROFILE

Vivek Khandelwal

Over 15 months, contributed to llvm/torch-mlir and related repositories by developing and maintaining advanced machine learning infrastructure. Focused on integrating PyTorch and TorchVision nightly releases, enhancing quantization and ONNX operator lowering, and improving CI/CD reliability. Used C++, Python, and MLIR to implement robust tensor operations, streamline build systems, and expand support for complex data types and dynamic shapes. Addressed build and test flakiness through targeted bug fixes and dependency management, while enabling end-to-end model testing and backend interoperability. The work resulted in more stable, performant pipelines and accelerated downstream adoption for MLIR-based machine learning workflows and tooling.

Overall Statistics

Feature vs Bugs

78%Features

Repository Contributions

76Total
Bugs
10
Commits
76
Features
35
Lines of code
9,170
Activity Months15

Work History

January 2026

2 Commits • 1 Features

Jan 1, 2026

January 2026 (2026-01) monthly summary focusing on correctness and integration improvements in Torch-MLIR across the LLVM/torch-mlir and IREE repositories. Delivered a targeted bug fix for dynamic-dimension handling in AtenTransposeInt lowering with an added type-cast to ensure output tensor type consistency, accompanied by test updates. Upgraded the Torch-MLIR subproject in IREE to a newer commit to improve integration and potential performance/features. These changes reduce runtime type errors in dynamic transpose paths and streamline cross-repo maintenance.

December 2025

4 Commits • 3 Features

Dec 1, 2025

December 2025 monthly summary focused on delivering measurable business value through robust testing infrastructure, compatibility improvements, and performance enhancements across two repos: nod-ai/SHARK-Platform and llvm/torch-mlir.

October 2025

1 Commits

Oct 1, 2025

For 2025-10, the focus was on hardening CI/CD hygiene and automating release cleanup for nod-ai/SHARK-Platform. Delivered a critical fix to the GitHub Actions cleanup workflow to perform real deletions by default, and aligned the DRY_RUN environment variable with the input, ensuring the cleanup process actually removes old releases rather than running in dry-run mode. This directly reduces storage bloat, minimizes manual cleanup work, and improves confidence in automated release management. The work is traceable to commit 7975496ca20463a03ff053d7b2c5379d2f537aab (PR #2450), reflecting a precise, accountable change in the pipeline. Overall, this contribution strengthens release hygiene, CI reliability, and operational efficiency, delivering tangible business value through automated asset cleanup and safer default behaviors. Technically, demonstrated proficiency with GitHub Actions, YAML workflow configuration, environment variable handling, and CI/CD automation practices.

September 2025

1 Commits

Sep 1, 2025

Concise monthly summary for 2025-09 focusing on key accomplishments and impact for nod-ai/SHARK-TestSuite. The month centered on stabilizing the CI workflow by addressing flaky ONNX tests, with minimal feature delivery but significant quality and process improvements.

August 2025

4 Commits • 3 Features

Aug 1, 2025

August 2025: Cross-repo stabilization and feature expansion for LLVM Torch-MLIR and IREE. Delivered stability improvements, expanded tensor indexing capabilities, and end-to-end support for key tensor ops, while aligning downstream dependencies with upstream Torch-MLIR progress. This work reduces test fragility, broadens operator coverage, and accelerates integration cycles for MLIR-based tooling.

July 2025

1 Commits

Jul 1, 2025

For July 2025, the focus was on stabilizing the llvm/torch-mlir CI/build pipeline by addressing a breakage caused by PyTorch/torchvision version updates. A critical bug fix reverted the manual version updates, restoring previous versions and re-establishing stable builds across the CI system. No new user-facing features were released this month; the emphasis was on reliability and process resilience. The work delivered enhances build reproducibility and reduces risk for downstream MLIR/LLVM integration efforts.

June 2025

7 Commits • 2 Features

Jun 1, 2025

June 2025 monthly summary for llvm/torch-mlir: Focused on keeping pace with PyTorch/TorchVision nightly releases and aligning the LLVM subproject with evolving LLVM behavior. Implemented build/test optimizations to reduce flakiness and speed up CI, enabling faster iteration for downstream users and stronger ecosystem compatibility.

May 2025

8 Commits • 4 Features

May 1, 2025

May 2025 — llvm/torch-mlir: Delivered key features and fixes across PyTorch/TorchVision compatibility, LLVM/MLIR integration, QLinear ONNX conversions, and ONNX AveragePool padding. Result: more stable nightly compatibility, stronger type safety and error handling, improved function-API and tensor support, and robust per-tensor quantization paths. Business value: faster, more reliable model deployment and smoother upgrades to PyTorch/TorchVision nightly streams.

April 2025

19 Commits • 6 Features

Apr 1, 2025

Professional monthly performance summary for 2025-04 highlighting business value and technical accomplishments across the llvm/torch-mlir repository. Emphasis on enabling product-ready quantized inference, improving correctness, and maintaining CI reliability for rapid iteration.

March 2025

10 Commits • 4 Features

Mar 1, 2025

March 2025 performance-focused update for llvm/torch-mlir. Delivered key integration and compatibility updates across the MLIR/LLVM backend, ONNX quantization enhancements, and neural network operator lowering, with robustness improvements and new features that strengthen production readiness and interoperability.

February 2025

6 Commits • 3 Features

Feb 1, 2025

February 2025 (llvm/torch-mlir) — Key features delivered, bugs fixed, and impact Key features delivered: - Nanobind dependency management in build system: fixed build failures by ensuring nanobind remains declared in build requirements; commits dd6ee1416949a56451434661376859364b6df6bd and 7cea07c31fe2cb84efdb97ddb7740c04db7d0cf0 re-apply and restore the intended dependency state, stabilizing the build. - Scaled Dot Product Attention: Enable Grouped Query Attention (GQA): adds support for the enable_gqa flag in the SDPA op, with tensor manipulation logic to repeat elements across dimensions and a new test validating the feature. (commit 25aa0c670acdfb03b4c28b93227e12c946f91dea) - STFT Enhancement and Nightly Compatibility: adds an optional align_to_window parameter to aten.stft to improve short-time Fourier transform behavior; updated to latest PyTorch/TorchVision nightly versions to support the change. (commits a786a0f02311f42b6c5ceff30dc9401dc38cbcd3 and 3db6aeaedbe0812a7f44b87df89a590eecf5b9ef) - ONNX RotaryEmbedding Linalg Lowering: introduces Onnx->Linalg lowering for the RotaryEmbedding operation, registers a custom Torch operation, and adds conversion patterns and tests for Torch MLIR interoperability. (commit adc06c81fb4bbefb5dabc146cc3ecd8ba5c2e78c) Major bugs fixed: - Build stability issue: restored nanobind in build requirements after revert scenarios, eliminating recurring build failures and ensuring reliable builds across environments. Overall impact and accomplishments: - Achieved a more stable and compatible build and feature surface for llvm/torch-mlir, reducing developer time spent on build-related issues and enabling new MLIR features for faster iteration in model tooling. - Enabled performance and capability improvements in core ops (GQA) and broader interoperability (ONNX->Linalg) while maintaining alignment with PyTorch/TorchVision nightly releases. Technologies/skills demonstrated: - Build-system maintenance and dependency management (nanobind integration) - Feature development in MLIR/Torch: SDPA GQA, STFT alignment, ONNX RotaryEmbedding lowering - Cross-repo interoperability and testing: nightly compatibility, test coverage for new features - Deep understanding of Torch MLIR integration and custom op registration

January 2025

3 Commits • 2 Features

Jan 1, 2025

Month: 2025-01 — Performance-driven month for llvm/torch-mlir focused on delivering core features, stabilizing the build, and expanding Python/C++ interoperability. Key outcomes include backend and binding enhancements that unlock broader model support and easier maintenance across the Torch-MLIR integration. Overview of work: - Delivered Tensor Operations Validation and Backend Enhancements to improve tensor metadata assertions and backend op compatibility, leveraging LLVM/StableHLO updates and TOSA legalization improvements. - Added Enhanced Python-C++ binding support via nanobind to simplify Python bindings and broaden integration capabilities for C++ libraries in Python apps. - Strengthened build stability and dependency management through a PyTorch version update and explicit nanobind build-time dependency to reduce binding friction. Impact: - Improves model reliability and correctness checks in Torch-MLIR workflows. - Enables easier integration of C++ libraries in Python pipelines, accelerating feature rich experiments and deployments. - Reduces build-time friction and alignment risks with downstream PyTorch releases.

December 2024

5 Commits • 3 Features

Dec 1, 2024

December 2024 (llvm/torch-mlir) focused on stabilizing CI, aligning with latest PyTorch/TorchVision, and advancing MLIR lowering and 1D conv capabilities. Delivered a CI stability fix, upgraded nightly dependencies with test alignment, introduced aten.special.expm1 lowering, and added 1D group convolution support via a 2D transformation. Result: more reliable CI, up-to-date test coverage, and expanded operation support enabling downstream performance and compatibility improvements.

November 2024

4 Commits • 3 Features

Nov 1, 2024

November 2024 performance summary: Delivered targeted feature work and stability improvements across llvm/torch-mlir and iree, focusing on quantization reliability, ONNX lowering simplifications, LLVM-compatibility fixes, and dependency stabilization to reduce breakages. The combined efforts improved model performance in quantized paths, streamlined graph lowering, and ensured consistent builds for downstream teams.

October 2024

1 Commits • 1 Features

Oct 1, 2024

Monthly summary for 2024-10: Delivered stability and compatibility improvements for llvm/torch-mlir by upgrading PyTorch and TorchVision to the latest nightly, addressing CI tensor dtype failures, and adjusting rrelu tests in the xfail set to reduce flaky behavior. These changes enhance build reliability, test stability, and downstream usability with minimal disruption to users.

Activity

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Quality Metrics

Correctness91.8%
Maintainability86.4%
Architecture89.8%
Performance86.0%
AI Usage32.2%

Skills & Technologies

Programming Languages

C++CMakeGitJSONMLIRPythonShellTextYAMLtext

Technical Skills

AI model integrationBuild System ConfigurationC++C++ DevelopmentC++ developmentC++ integrationCI/CDCMakeCompiler DesignCompiler designComplex Data TypesContinuous IntegrationConvolutional Neural NetworksData EvaluationDeep Learning

Repositories Contributed To

4 repos

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

llvm/torch-mlir

Oct 2024 Jan 2026
13 Months active

Languages Used

PythonC++ShellMLIRtextCMake

Technical Skills

Continuous IntegrationMachine LearningPyTorchC++C++ developmentLLVM

iree-org/iree

Nov 2024 Jan 2026
3 Months active

Languages Used

GitShellC++

Technical Skills

Dependency ManagementC++ developmentlibrary integration

nod-ai/SHARK-Platform

Oct 2025 Dec 2025
2 Months active

Languages Used

PythonYAMLJSON

Technical Skills

CI/CDGitHub ActionsScriptingAI model integrationData EvaluationMachine Learning

nod-ai/SHARK-TestSuite

Sep 2025 Sep 2025
1 Month active

Languages Used

Text

Technical Skills

CI/CDTest Management