extern void update_rusage_stat(struct thread_data *);
extern void setup_log(struct io_log **, unsigned long, int, int, const char *);
extern void __finish_log(struct io_log *);
+extern void free_log(struct io_log *);
extern struct io_log *agg_io_log[DDIR_RWDIR_CNT];
extern int write_bw_log;
extern void add_agg_sample(unsigned long, enum fio_ddir, unsigned int);