perf_file_attr
struct perf_file_attr f_attr = {
attr_size += sizeof(struct perf_file_attr);
.attr_size = sizeof(struct perf_file_attr),
data_offset += evlist->core.nr_entries * sizeof(struct perf_file_attr);
struct perf_file_attr *f_attr)
struct perf_file_attr f_attr;