+extern void add_lat_sample(struct thread_data *, enum fio_ddir, unsigned long long,
+ unsigned int, uint64_t);
+extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long long,
+ unsigned int, uint64_t);
+extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long,
+ unsigned int, uint64_t);
+extern void add_agg_sample(union io_sample_data, enum fio_ddir, unsigned int);
+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 int calc_log_samples(void);