FreeBSD Kernel Testing Engineer

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Mandatory Skills Description:

3-5 years of relevant experience Hands-on experience with modern Unix/Linux kernel validation (FreeBSD kernel validation is a strong bonus) Strong understanding of performance management frameworks (e.g., PMCs, perf, hardware performance counters) Solid understanding of x86 architecture, especially performance monitoring hardware Excellent automation and scripting skills (Python, Shell, or similar) Experience designing and implementing automated test cases for performance monitoring frameworks Ability to work with low-level debugging, instrumentation, and system performance tools

Nice-to-Have Skills Description:

Direct experience with FreeBSD performance monitoring framework (hwpmc) and its validation Experience with AMD platform architecture and performance counter implementations Familiarity with kernel-level performance debugging tools Background in continuous integration setup for kernel or system-level testing

Project Description:

We are looking for an experienced FreeBSD Kernel Testing Engineer to join a project focused on expanding and enhancing the Performance Monitoring Counters (PMC) validation test suite for modern platforms. The goal of the project is to strengthen the reliability and coverage of FreeBSD's performance monitoring frameworks across core, uncore, and IBS PMCs. You will be responsible for creating new validation tests, improving existing ones, ensuring correct PMC multiplexing behavior, and enabling proper PMC attachment to live processes in FreeBSD environments. This role involves close work with low-level system internals, performance instrumentation, and automated test development.

Responsibilities:

Develop and enhance the PMC validation test suite on FreeBSD for modern platforms Validate core, uncore, and IBS performance monitoring counters Validate PMC multiplexing on FreeBSD Validate proper PMC attach functionality to existing processes Design and automate test scenarios across various performance monitoring frameworks Collaborate with kernel engineers to analyze results, identify issues, and propose fixes or improvements Maintain documentation, test plans, and validation reports Contribute to continuous improvement of automation frameworks and test coverage