+extern void reset_io_stats(struct thread_data *);
+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,
+ unsigned int, uint64_t);
+extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned 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_bw_sample(struct thread_data *, enum fio_ddir, unsigned int,
+ struct timeval *);
+extern void add_iops_sample(struct thread_data *, enum fio_ddir, unsigned int,
+ struct timeval *);
+extern void add_agg_sample(unsigned long, enum fio_ddir, unsigned int);