extern void add_lat_sample(struct thread_data *, enum fio_ddir, unsigned long,
unsigned int);
extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long,
extern void add_lat_sample(struct thread_data *, enum fio_ddir, unsigned long,
unsigned int);
extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long,