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Samuli Leivo

PROFILE

Samuli Leivo

Over 19 months, contributed to the tiiuae/ci-test-automation repository by engineering robust automated testing infrastructure focused on reliability, performance, and observability. Developed and maintained test suites using Python, Robot Framework, and Bash, covering areas such as GUI automation, power measurement, and network security. Enhanced CI/CD pipelines with adaptive performance analysis, dynamic configuration, and device-specific test logic, while expanding hardware coverage and improving test determinism. Addressed flakiness and debugging challenges through targeted bug fixes, improved logging, and resilient SSH handling. The work enabled faster feedback cycles, clearer performance reporting, and more scalable, maintainable test automation across diverse hardware and deployment scenarios.

Overall Statistics

Feature vs Bugs

72%Features

Repository Contributions

139Total
Bugs
21
Commits
139
Features
55
Lines of code
8,508
Activity Months19

Work History

April 2026

2 Commits

Apr 1, 2026

April 2026 monthly summary for tiiuae/ci-test-automation: Strengthened reliability of power measurement during suspension tests and improved test instrumentation. Delivered fixes that remove fragile in-keyword checks, centralize validation in tests, and address a recurring issue on prod Lenovo X1. These changes improve measurement accuracy, reduce flakiness, and improve CI signal reliability, enabling more trustworthy automation results.

March 2026

9 Commits • 4 Features

Mar 1, 2026

March 2026 monthly summary: Delivered stability, reliability, and observability improvements across CI automation and Ghaf infra. Focused on reducing flaky tests, tightening daemon lifecycle handling, and accelerating deployments. Demonstrated strong test automation, monitoring, and security-testing skills with tangible business value through more reliable CI runs, faster installations, and improved visibility into model downloads and power usage.

February 2026

8 Commits • 2 Features

Feb 1, 2026

February 2026: Focused on stabilizing and expanding the FleetDM-based testing pipeline for tiiuae/ci-test-automation and strengthening device-specific test infrastructure. Delivered a more reliable end-to-end testing flow with robust device enrollment/status checks, enhanced logging, and performance-test reliability improvements. Introduced device-parameter–driven configuration (RPi IP) and device-type toggles to improve reliability across Lenovo X1 and other devices. Implemented reliability improvements to CI (ydotoold as a unit service; skip safeguards for secrets) and timestamp/timezone handling to reduce flaky tests. These changes reduce test flakiness, accelerate feedback, and improve confidence in deployments.

January 2026

11 Commits • 3 Features

Jan 1, 2026

January 2026 delivered security, observability, and reliability enhancements across the CI test automation stack (tiiuae/ci-test-automation). The work improves auditability of system updates, reduces risk of secret leakage, strengthens test stability across hardware, and simplifies maintenance, enabling faster feedback and higher confidence in release readiness. Key business outcomes include improved compliance with auditability requirements, clearer security guarantees for credentials, and more reliable automated validation across diverse hardware platforms.

December 2025

5 Commits • 4 Features

Dec 1, 2025

December 2025 (Month: 2025-12) - Delivered targeted test infrastructure improvements in tiiuae/ci-test-automation to boost reliability, security, and device coverage. Key features and stability fixes were implemented, enabling more deterministic results across hardware and CI runs, while reducing risk of credential leakage in reports. The efforts accelerated feedback for release validation and broadened test scope to additional devices.

November 2025

2 Commits

Nov 1, 2025

November 2025: Stabilized the update path in ci-test-automation by refactoring update tests for robust rollback and cleanup after package updates. This reduced GUI test flakiness caused by multiple /nix/store generations. Temporarily disabled update tests to prevent cascading GUI failures and added documentation outlining required rollback and garbage collection in teardown. These changes improve CI reliability, reduce maintenance overhead, and provide clear guidance for state management after updates.

October 2025

6 Commits • 4 Features

Oct 1, 2025

Monthly summary for 2025-10 focused on tiiuae/ci-test-automation: strengthened automation reliability, enhanced power measurement capabilities, and expanded OTA/test coverage. Implemented power management validation, test infra efficiency, and firewall-compliant test pacing to improve stability and data integrity across CI runs.

September 2025

10 Commits • 5 Features

Sep 1, 2025

Month: 2025-09 | tiiuae/ci-test-automation - Performance-focused monthly summary. Key features delivered: - Ghaf-host connectivity stability and standardization across tests: reduced new connections, switched to VM for reliability, and centralized host definition via variables to improve maintainability. - Ballooning performance test reliability and cleanup: refined memory management, VM interactions, test parameters, and explicit cleanup steps to avoid hangs. - Stabilize ipspoof test to prevent hangs: introduced delays, timeouts, and sequencing to ensure the stealer VM exits before the script starts. - Parallel FileIO isolation testing and cross-test plotting/data saving improvements: added parallel file I/O testing across VMs, generalized data saving, refactored plotting for CPU and FileIO isolation tests, and disabled relay board where unnecessary. - PerformanceDataProcessing enhancements: build_type reporting and dynamic thresholds: correctly initialize build_type based on job/target and add dynamic low_limit controls for tests; Power measurement verification during suspension and wake-up: added checks and extended logging for better pre/post-suspension power comparisons. Major bugs fixed: - Fixed failures in connecting to ghaf-host and ensured stable teardown procedures during CPU isolation tests. - Resolved ipspoof test hangs with controlled delays and sequencing to guarantee proper VM state transitions. Overall impact and accomplishments: - Significantly increased CI reliability and test throughput, enabling faster feedback loops and more robust performance benchmarks. - Improved data quality and consistency across tests, reducing flaky results and enabling clearer regression signals. Technologies/skills demonstrated: - Test automation engineering, VM orchestration, and environment stabilization. - Dynamic configuration via variables, robust cleanup patterns, and parallel test execution. - Data collection, generalized saving, and plotting improvements for performance metrics. - Power measurement instrumentation and logging for comparison of pre/post-suspend states.

August 2025

10 Commits • 5 Features

Aug 1, 2025

August 2025 (2025-08) focused on reliability, maintainability, and visibility for the ci-test-automation suite. Delivered features that generalize hardware-target names, enhance performance plots with anomaly markers, and introduce CPU isolation testing, along with resilience improvements in IP spoofing tests and GUI automation. Also optimized plot readability and reinforced test network handling to reduce flakiness. These changes reduce debugging time, increase test reuse across hardware targets, and enable scalable measurement of performance and isolation scenarios.

July 2025

6 Commits • 1 Features

Jul 1, 2025

July 2025 (2025-07) — tiiuae/ci-test-automation: Delivered substantial VM-based testing enhancements and fixed a critical performance-data bug, strengthening CI reliability, coverage, and business value. Key outcomes include improved VM test coverage (PDF opening across VMs, generalized VM switch keyword, robust teardown, standardized terminology) and more reliable performance evaluation across configurations thanks to the marginal calculation fix. Skills demonstrated: Python-based test automation, VM orchestration, cross-VM coordination, memory checks, and test reliability improvements. Impact: faster feedback loops, reduced flaky tests, and clearer test results for release validation.

June 2025

4 Commits • 1 Features

Jun 1, 2025

June 2025 monthly summary for tiiuae/ci-test-automation. The team focused on improving reliability, debuggability, and visibility of CI tests through targeted bug fixes and GUI test enhancements. The work delivered direct business value by ensuring accurate performance reporting, broader GUI coverage, and better debugging capabilities for faster iteration.

May 2025

11 Commits • 3 Features

May 1, 2025

May 2025 — tiiuae/ci-test-automation: Reliability, visibility, and coverage improvements across the test automation pipeline. Delivered targeted reliability fixes, expanded hardware test coverage, and modernized data processing and plotting for actionable decision-making. These changes reduced flaky CI runs, accelerated feedback loops, and broadened validation for new hardware while simplifying maintenance and future enhancements.

April 2025

4 Commits • 2 Features

Apr 1, 2025

April 2025 monthly summary for tiiuae/ci-test-automation: Delivered reliability and measurement improvements across plots, boot-time metrics, and power data collection; refactored performance analysis for robust baseline handling; and clarified Orin boot timing measurements. These changes reduce false positives, improve data quality, and enable faster triage and confidence in CI test results.

March 2025

5 Commits • 2 Features

Mar 1, 2025

March 2025 monthly summary: Delivered substantial improvements to performance testing automation and CI reliability across two repositories. In tiiuae/ci-test-automation, consolidated performance tests into a unified suite with improved file I/O test location usage, deviation detection/reporting, and portable plots via relative paths. Also introduced Memory Ballooning Performance Tests with memory allocation logging and a Python plotting tool. In tiiuae/ghaf-jenkins-pipeline, fixed an image URL parsing bug to correctly handle commit-hash-containing URLs in pre-merge pipelines, stabilizing CI runs.

February 2025

16 Commits • 5 Features

Feb 1, 2025

February 2025 monthly summary focusing on delivering robust test automation, expanding performance realism, and improving observability across two repositories (tiiuae/ci-test-automation and tiiuae/ghaf-infra). Key features delivered include stabilizing SSH/Robot Framework connectivity, reliability enhancements for Lenovo‑X1 tests, an adaptive performance testing framework, configurable Robot Framework artifacts, and an Orin AGX thread configuration upgrade. Major bugs fixed include preventing test aborts on iteration failures, fixing Lenovo‑X1 relay boot tests and IP verification, and addressing flaky Lenovo‑X1 WiFi tests. Overall impact: higher test stability, more realistic performance measurements, and richer, easier-to-debug artifacts, enabling faster turnaround in CI and higher confidence in release quality. Technologies/skills demonstrated include Robot Framework, SSH keyword engineering, ghaf integration, adaptive performance tooling, configurable test artifacts, multi-thread testing, and enhanced logging for observability.

January 2025

10 Commits • 5 Features

Jan 1, 2025

January 2025 monthly summary focusing on delivering measurable business value through CI/CD enhancements, GUI test automation, and production alignment. Key features and changes were implemented across three repositories to improve reliability, reduce release risk, and accelerate feedback loops.

December 2024

12 Commits • 5 Features

Dec 1, 2024

December 2024 performance summary: Delivered core automated testing improvements across three repositories, expanding coverage, reliability, and observability. Implemented GUI-test integration in nightly builds, introduced a dedicated security test suite for IP spoofing, added power measurement for suspend tests, and configured a development measurement agent. Also stabilized test environments by refining Linux paths, credentials handling, Lenovo device setup, and gating fixes, culminating in a more robust, data-driven QA pipeline with enhanced visibility for business outcomes.

November 2024

7 Commits • 4 Features

Nov 1, 2024

November 2024 performance summary focused on reliability, instrumentation, and flexibility across test automation and CI/CD pipelines. Delivered robust enhancements to performance testing, expanded power measurement capabilities, and improved GUI test stability while cleaning up the test suite for better maintainability and reduced flakiness.

October 2024

1 Commits

Oct 1, 2024

Monthly summary for 2024-10 for tiiuae/ci-test-automation. Focused on delivering a targeted bug fix to icon pack path discovery, improving GUI test reliability and CI stability. Key contribution includes a commit that excludes .drv files from path discovery to ensure only relevant icon pack paths are retrieved.

Activity

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Quality Metrics

Correctness84.2%
Maintainability84.0%
Architecture79.8%
Performance77.4%
AI Usage21.2%

Skills & Technologies

Programming Languages

BashGroovyMarkdownNixPythonRobot FrameworkRobotFrameworkShell

Technical Skills

AI model managementAPI testingAutomationAutomation ScriptingAutomation TestingBug FixingCI/CDCode RefactoringConfiguration ManagementContinuous IntegrationCopyright ManagementData AnalysisData LoggingData PlottingData Processing

Repositories Contributed To

3 repos

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

tiiuae/ci-test-automation

Oct 2024 Apr 2026
19 Months active

Languages Used

Robot FrameworkPythonShellGroovyNixBashRobotFrameworkMarkdown

Technical Skills

GUI testingscriptingtest automationCI/CDData AnalysisGUI Testing

tiiuae/ghaf-jenkins-pipeline

Nov 2024 Mar 2025
4 Months active

Languages Used

Groovy

Technical Skills

CI/CDJenkins PipelinePipeline ManagementRegular Expressions

tiiuae/ghaf-infra

Dec 2024 Mar 2026
4 Months active

Languages Used

NixGroovy

Technical Skills

DevOpsInfrastructure ConfigurationConfiguration ManagementInfrastructure as CodePerformance TuningSystem Configuration