52     struct perf_event_attr attr {};  in Create()  struct
53     attr.size = sizeof(attr);  in Create()
61     arg.attr = &attr;  in Create()
69     attr.disabled = is_first;  in Create()
73     attr.inherit = true;  in Create()
74     attr.pinned = is_first;  in Create()
75     attr.exclude_kernel = true;  in Create()
76     attr.exclude_user = false;  in Create()
77     attr.exclude_hv = true;  in Create()
79     attr.read_format = PERF_FORMAT_GROUP;  in Create()
86       id = perf_event_open(&attr, 0, -1, group_id, 0);  in Create()