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Nebojsa Sumrak

PROFILE

Nebojsa Sumrak

Over an 18-month period, contributed to the tenstorrent/tt-forge-fe, tt-forge, tt-xla, and tt-mlir repositories by building and optimizing CI/CD pipelines, automated testing frameworks, and performance benchmarking systems. Leveraged Python, Bash, and Docker to deliver robust workflow automation, cross-repo artifact management, and scalable test orchestration. Enhanced code quality and release reliability through integration of static analysis, code coverage, and Slack-based observability. Addressed build stability and packaging issues with targeted bug fixes and infrastructure upgrades. The work enabled faster feedback cycles, improved test coverage, and streamlined onboarding, supporting safer, more efficient releases and reducing operational overhead across complex machine learning toolchains.

Overall Statistics

Feature vs Bugs

77%Features

Repository Contributions

188Total
Bugs
20
Commits
188
Features
68
Lines of code
454,605
Activity Months18

Work History

July 2026

2 Commits • 1 Features

Jul 1, 2026

July 2026 monthly summary for tenstorrent/tt-xla focused on CI reliability and deeper validation through an op-by-op IR workflow. Delivered two primary changes in the CI pipeline that improve reliability, coverage, and feedback speed for model inference validation. These changes reduce flaky builds, increase test coverage for IR processing, and accelerate issue diagnosis and fixes across the team.

June 2026

9 Commits • 1 Features

Jun 1, 2026

June 2026 monthly summary for tenstorrent development. Focus was on strengthening CI reliability, expanding cross-repo testing, and stabilizing builds after uplift work, with clear business value in faster feedback and safer releases for tt-xla and tt-mlir.

May 2026

8 Commits • 4 Features

May 1, 2026

May 2026 performance highlights focused on reducing maintenance burden, stabilizing CI/CD, and improving runtime observability across three repos. Key outcomes include de-cluttering the codebase by removing deprecated release artifacts in tt-forge, restoring reliable uplift automation in tt-xla by fixing bot-token privileges, enhancing debugging/analytics for the tt-xla explorer wheel, improving CI reliability and version alignment (SFPI usage for local builds and replacing fetch_job_id with check_job_id), and optimizing test distribution in tt-mlir with automated builder test durations and autosplit plus packaging fixes to install ttmlir_runtime in python_packages. These efforts reduce operational overhead, accelerate development cycles, and improve production reliability and visibility.

April 2026

23 Commits • 7 Features

Apr 1, 2026

April 2026 monthly summary: Delivered a set of business- and performance-oriented improvements across tt-forge-fe, tt-xla, tt-forge, and tt-mlir to reduce onboarding friction, stabilize packaging/CI, and enhance failure analytics and automation. Key outcomes include: improved tt-forge-onnx installation UX with wheel simplifications, a Dockerfile, and installation prerequisites documented; packaging reliability improvements via Pillow substitution, libtt-umd wheel packaging fixes, and updated GitHub Actions to latest versions; Failure Inspector enhancements enabling per-test bisect reporting, indeterminate result handling, and improved Slack integration; CI reliability and workflow modernization with in-service test execution and action upgrades; and a new manual build workflow for Torch-XLA plus CI/CD workflow upgrades for tt-forge.

March 2026

4 Commits • 1 Features

Mar 1, 2026

Monthly work summary for 2026-03 focusing on business value and technical achievements for tenstorrent/tt-xla. Delivered cross-distro packaging enhancements, CI improvements, and critical fixes to enable reliable wheel distribution and tests.

February 2026

11 Commits • 6 Features

Feb 1, 2026

February 2026 highlights across four repositories (tt-xla, tt-mlir, tt-forge-fe, tt-forge) focused on delivering business-value through tooling, build optimizations, and CI improvements. The work yielded faster release cycles, smaller artifact footprints, and more reliable, scalable CI. Notable efforts include: CLI tooling for SFPI dependency management, build-size optimizations via system SFPI usage, robust CI workflow enhancements to skip non-relevant PRs and validate config, and stabilization of manylinux environments and caching mechanisms for consistent builds.

January 2026

7 Commits • 5 Features

Jan 1, 2026

January 2026 monthly performance summary focusing on key features implemented, bugs fixed, and outcomes across four repos (tt-mlir, tt-forge, tt-forge-fe/onnx, tt-xla). Highlights include Docker-based TT-XLA build pipeline with tt-metal dependencies and a core-tools toggle; CI/CD reliability improvements; repository rename and ONNX alignment; removal of obsolete workflows; and build-time optimizations by removing protobuf compilation. These efforts deliver faster, more reliable builds, better interoperability with ONNX, and reduced maintenance overhead, enabling faster business value delivery.

December 2025

17 Commits • 5 Features

Dec 1, 2025

December 2025 monthly summary for tenstorrent repos (tt-xla, tt-mlir, tt-forge-fe). Focused on delivering high-value features, stabilizing CI/CD, and improving packaging reliability. Highlights include automated nightly bisect workflow and PCC-drop reporting (tt-xla), CI/CD reliability and packaging fixes across the toolchain (tt-xla), disk-space cleanup automation for hosted model explorer (tt-mlir), Explorer setup automation (tt-mlir), and Nightly Reporting workflow automation and CI/CD enhancements (tt-forge-fe). These efforts reduce MTTR, improve the accuracy of nightly uplift decisions, improve release quality, and strengthen cross-environment CI.

November 2025

14 Commits • 4 Features

Nov 1, 2025

November 2025 monthly summary: Delivered substantial CI/CD improvements across tt-mlir and tt-xla, focusing on reliability, throughput, and build efficiency. Key changes include enabling and optimizing OpModel tests in Tracy builds, moving expensive tests to dedicated groups, dynamic CIv2 offload rules to alleviate CI queue pressure, and targeted docker/build tooling improvements. In tt-xla, added deployment resiliency for nightly runs and adjusted Slack messaging to reduce noise. Cross-repo alignment of base images and tooling improved consistency and predictable delivery.

October 2025

2 Commits • 2 Features

Oct 1, 2025

Performance-review style monthly summary for 2025-10 focusing on business value and technical outcomes for tenstorrent/tt-forge. Delivered two major feature enhancements in the CI/CD pipeline: (1) Zstandard (.tar.zst) support in the download-artifact action with test coverage, and (2) streamlined artifact processing by removing obsolete steps and standardizing artifact naming. These changes reduced build times and simplified maintenance, improving pipeline reliability. No critical bugs fixed this month; effort prioritized feature delivery and pipeline robustness. Technologies demonstrated include GitHub Actions, zstd compression handling, test-driven validation, and CI/CD optimization.

September 2025

7 Commits • 2 Features

Sep 1, 2025

September 2025 monthly highlights for tenstorrent/tt-forge focus on building a robust, future-proof Python stack, stabilizing performance benchmarks, and strengthening CI/CD operations to accelerate reliable releases.

August 2025

4 Commits • 2 Features

Aug 1, 2025

August 2025: Key CI/Perf automation improvements across two repos to streamline benchmarking, reduce noise, and improve visibility. Implemented targeted removal of perf benchmarks in the frontend repo and strengthened CI for performance benchmarks with clearer runner handling and proactive monitoring. Introduced cross-repo VM runner availability checks with Slack alerts to minimize downtime and keep stakeholders informed. These changes accelerate feedback loops, improve reliability of performance metrics, and establish scalable patterns for future benchmark work.

July 2025

21 Commits • 4 Features

Jul 1, 2025

July 2025 performance-focused delivery across tenstorrent/tt-forge-fe and tenstorrent/tt-forge. Key outcomes include stabilizing test execution with crash analytics, strengthening nightly uplift traceability, enabling shared runners and Docker cache for faster, more reliable CI, and advancing cross-repo performance benchmarking capabilities. These changes reduce flaky tests, shorten feedback cycles for PRs, and improve visibility into test crashes, uplifts, and benchmark results, driving faster and more reliable software delivery.

June 2025

15 Commits • 6 Features

Jun 1, 2025

June 2025 performance snapshot: Delivered high-value CI/test improvements across tt-forge-fe and tt-forge, strengthening reliability, security, and visibility. Implemented automated test duration management, integrated comprehensive code quality analysis, added robust crash/hang detection for PyTest, and centralized performance analytics to guide data-driven optimizations. Also fixed critical CI cancellation behavior and streamlined documentation build/testing workflows to accelerate feedback loops and reduce manual toil. Collectively, these efforts improved CI stability, test coverage, and engineering throughput, enabling faster risk-aware releases and better user-facing quality.

May 2025

17 Commits • 5 Features

May 1, 2025

May 2025: Strengthened CI reliability and nightly failure diagnosis across tt-forge ecosystems. Delivered automated Nightly Fail Inspector improvements, stabilized artifact handling, and restructured CI workflows to accelerate feedback loops. Introduced a Blackhole nightly separation to reduce contention and added a robust artifact download action shared across repos. The work reduced flakiness, improved data handling for failure analysis, and demonstrated strong automation, Docker integration, and GitHub Actions expertise, delivering measurable business value through faster root-cause analysis, more stable nightly builds, and smoother developer iteration.

April 2025

16 Commits • 7 Features

Apr 1, 2025

April 2025 performance summary for the tenstorrent repositories (tt-forge-fe and tt-forge). This month focused on stabilizing and accelerating CI/CD, improving compliance and artifact handling, and enabling robust performance benchmarking, while also enhancing developer onboarding and documentation.

March 2025

10 Commits • 5 Features

Mar 1, 2025

March 2025 (2025-03) – Tenstorrent tt-forge-fe: Delivered a cohesive set of CI/CD, observability, and performance enhancements that improve code quality, release reliability, and data-driven optimization. Key investments include code coverage reporting with Codecov integration, expanded nightly build visibility via Slack notifications, enhanced benchmark reporting with JSON outputs and structured result management, integrated performance testing in CI using ttrt, and substantial CI tooling upgrades (pre-commit, Python 3.10, and pip caching). These changes reduce feedback time, increase test/trial traceability, and provide richer analytics for performance and stability work.

February 2025

1 Commits • 1 Features

Feb 1, 2025

February 2025 monthly summary for tenstorrent/tt-forge-fe: Implemented CI workflow environment control by adding a runs-on parameter to GitHub Actions workflows, enabling explicit machine selection for test execution and improving stability of nightly tests by constraining them to the n300 machine.

Activity

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Quality Metrics

Correctness87.6%
Maintainability85.0%
Architecture83.6%
Performance81.4%
AI Usage22.2%

Skills & Technologies

Programming Languages

BashC++CMakeDockerfileJSONMarkdownPythonShellTOMLXML

Technical Skills

API IntegrationAnalytics IntegrationBashBash ScriptingBash scriptingBuild AutomationBuild ConfigurationBuild OptimizationBuild SystemsC++C++ developmentCI/CDCMakeCode CoverageCode Maintenance

Repositories Contributed To

4 repos

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

tenstorrent/tt-forge-fe

Feb 2025 Apr 2026
11 Months active

Languages Used

YAMLBashC++CMakeDockerfilePythonMarkdownShell

Technical Skills

CI/CDGitHub ActionsBuild AutomationBuild SystemsCMakeCode Coverage

tenstorrent/tt-forge

Apr 2025 May 2026
11 Months active

Languages Used

BashPythonShellYAMLJSONDockerfileTOML

Technical Skills

CI/CDContainerizationDevOpsGitHub ActionsLicense ComplianceMLOps

tenstorrent/tt-xla

Nov 2025 Jul 2026
9 Months active

Languages Used

BashDockerfileShellYAMLPythonbashCMakeJSON

Technical Skills

CI/CDDevOpsDockerGitHub ActionsSlack IntegrationTesting

tenstorrent/tt-mlir

Nov 2025 Jun 2026
7 Months active

Languages Used

BashDockerfilePythonShellYAMLbashyamlCMake

Technical Skills

CI/CDContainerizationContinuous IntegrationDevOpsDockerGitHub Actions