从modules/mod_cpu.c入手
./devel/tsar.h
module 结构体：
struct module {
char name[LEN_32];
char opt_line[LEN_32];
char record[LEN_1M];
char usage[LEN_256];
char parameter[LEN_256];
char print_item[LEN_256];
struct mod_info *info;
void *lib;
int enable;
int spec;
int p_item;
/* private data used by framework*/
int n_item;
int n_col;
long n_record;
int pre_flag:4;
int st_flag:4;
U_64 *pre_array;
U_64 *cur_array;
double *st_array;
double *max_array;
double *mean_array;
double *min_array;
/* callback function of module */
void (*data_collect) (struct module *, char *);
void (*set_st_record) (struct module *, double *, U_64 *, U_64 *, int);
/* mod manage */
void (*mod_register) (struct module *);
};