Worked on the google/perfetto repository to enhance the reliability of performance tracing data by addressing a critical issue in CPU topology reporting. Focused on traced_perf, the work involved correcting the detection of always-on CPUs on x86 systems by treating missing '/online' files as an indicator that CPUs are online, thereby eliminating false offline signals in trace outputs. This fix improved the accuracy and trustworthiness of performance metrics across platforms. Leveraged expertise in Linux kernel interaction, system programming, and performance profiling, utilizing C++ to ensure robust handling of system files and to maintain data integrity for users relying on trace analysis.