PERF_EVENT_IOC_ENABLE  454 include/uapi/linux/perf_event.h #define PERF_EVENT_IOC_ENABLE			_IO ('$', 0)
PERF_EVENT_IOC_ENABLE  454 tools/include/uapi/linux/perf_event.h #define PERF_EVENT_IOC_ENABLE			_IO ('$', 0)