PERF_ATTR_SIZE_VER2  298 include/uapi/linux/perf_event.h #define PERF_ATTR_SIZE_VER2	80	/* add: branch_sample_type */
PERF_ATTR_SIZE_VER2  298 tools/include/uapi/linux/perf_event.h #define PERF_ATTR_SIZE_VER2	80	/* add: branch_sample_type */