Ensure that we have no IO pending when sleeping
For rate limiting or thinktime handling, ensure that we have
no busy IO when we do spin or sleep. Otherwise we potentially
skew the latencies a lot, since events could have been reaped.
Already working for rate iops, just abstracted it out and
ensure that we do the same for thinktime. Only a problem for
certain workloads, those with queuedepth > 1.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/ioengine.h b/ioengine.h
index 362ab3e..0be905f 100644
--- a/ioengine.h
+++ b/ioengine.h
@@ -196,6 +196,7 @@
extern int __must_check io_u_sync_complete(struct thread_data *, struct io_u *, uint64_t *);
extern int __must_check io_u_queued_complete(struct thread_data *, int, uint64_t *);
extern void io_u_queued(struct thread_data *, struct io_u *);
+extern void io_u_quiesce(struct thread_data *);
extern void io_u_log_error(struct thread_data *, struct io_u *);
extern void io_u_mark_depth(struct thread_data *, unsigned int);
extern void fill_io_buffer(struct thread_data *, void *, unsigned int, unsigned int);