.off1 = offsetof(struct thread_options, bs[DDIR_READ]),
.off2 = offsetof(struct thread_options, bs[DDIR_WRITE]),
.off3 = offsetof(struct thread_options, bs[DDIR_TRIM]),
.off1 = offsetof(struct thread_options, bs[DDIR_READ]),
.off2 = offsetof(struct thread_options, bs[DDIR_WRITE]),
.off3 = offsetof(struct thread_options, bs[DDIR_TRIM]),