commit 7e77dd026d85253936aef432ba8f3e89b96b805c
author Jens Axboe <jens.axboe@oracle.com> Tue Feb 20 10:57:34 2007 +0100
committer Jens Axboe <jens.axboe@oracle.com> Tue Feb 20 10:57:34 2007 +0100
tree 0b90d5b4ca2b1e01d64bbd9789d4f81733d292d7
parent 00de55ef85f01f3c56fac5397aca92eef0c73762

Improve submission latency calculation

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

io_u.c

diff --git a/io_u.c b/io_u.c
index ab46cbe..6234c42 100644
--- a/io_u.c
+++ b/io_u.c
@@ -555,3 +555,14 @@
 
 	return -1;
 }
+
+/*
+ * Call when io_u is really queued, to update the submission latency.
+ */
+void io_u_queued(struct thread_data *td, struct io_u *io_u)
+{
+	unsigned long slat_time;
+
+	slat_time = mtime_since(&io_u->start_time, &io_u->issue_time);
+	add_slat_sample(td, io_u->ddir, slat_time);
+}