PERF_ATTR_SIZE_VER3  299 include/uapi/linux/perf_event.h #define PERF_ATTR_SIZE_VER3	96	/* add: sample_regs_user */
PERF_ATTR_SIZE_VER3  299 tools/include/uapi/linux/perf_event.h #define PERF_ATTR_SIZE_VER3	96	/* add: sample_regs_user */