PERF_FLAG_FD_OUTPUT 1045 include/uapi/linux/perf_event.h #define PERF_FLAG_FD_OUTPUT		(1UL << 1)
PERF_FLAG_FD_OUTPUT 1045 tools/include/uapi/linux/perf_event.h #define PERF_FLAG_FD_OUTPUT		(1UL << 1)
PERF_FLAG_FD_OUTPUT    7 tools/perf/trace/beauty/perf_event_open.c # define PERF_FLAG_FD_OUTPUT		(1UL << 1)