+extern void update_rusage_stat(struct thread_data *);
+extern void clear_rusage_stat(struct thread_data *);
+
+extern void add_lat_sample(struct thread_data *, enum fio_ddir, unsigned long long,
+ unsigned long long, uint64_t);
+extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long long,
+ unsigned long long, uint64_t);
+extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long,
+ unsigned long long, uint64_t);
+extern void add_agg_sample(union io_sample_data, enum fio_ddir, unsigned long long);
+extern void add_iops_sample(struct thread_data *, struct io_u *,
+ unsigned int);
+extern void add_bw_sample(struct thread_data *, struct io_u *,
+ unsigned int, unsigned long long);
+extern void add_sync_clat_sample(struct thread_stat *ts,
+ unsigned long long nsec);
+extern int calc_log_samples(void);
+
+extern struct io_log *agg_io_log[DDIR_RWDIR_CNT];
+extern int write_bw_log;