Worked on the madeline-underwood/arm-learning-paths repository to enhance the reliability of performance monitoring in embedded systems. Focused on stabilizing performance sampling by addressing a bug in the Event Counter Mapping logic, ensuring that event IDs are correctly mapped to their corresponding values within the pe_val array. This targeted fix, implemented in C, improved the integrity of perf samples by eliminating mis-mapping issues in the code path associated with perf_event_open. The update also included revisions to documentation and code samples, reflecting the corrected counting logic and data flow. Demonstrated attention to detail in C programming and embedded performance monitoring.