Описание тега xperf
NoneXperf.exe is a tool from Windows SDK to control event tracing via designated Windows facility called ETW. The tool is often used for performance analysis and OS troubleshooting.
Xperf .exe is a tool from Windows SDK Performance Kit to control event tracing via designated Windows facility called ETW (Event Tracing for Windows). Windows OS components are capable of emitting various ETW events corresponding to events in the Operating System. Examples are context switches and timer interrupts (for CPU profiling). xperf.exe can enable or disable emission of specific types of ETW events and save emitted events in log files for future analysis.