How AI describes perf (Linux)

Perf is a Linux profiling and tracing tool (perf_events) that uses hardware performance counters, kernel tracepoints, and dynamic tracing via kprobes and uprobes. It provides commands such as perf stat, perf record, perf report, perf annotate, and perf top to collect, analyze, and visualize performance data across processes and CPUs with low overhead. The project is part of the Linux kernel (tools/perf) and offers tutorials and community support, including involvement in Google Summer of Code.