From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 20 Feb 2007 10:34:54 +0000 (+0100)
Subject: Fix sync engine completion latency
X-Git-Tag: fio-1.12~53
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=5aeb77df5d75d1065b339c47afbd882a3c04702e

Fix sync engine completion latency

td_io_queue() needs to differentiate between the sync and async
engines wrt setting issue_time.

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

diff --git a/ioengines.c b/ioengines.c
index 2a11ed32..db333796 100644
--- a/ioengines.c
+++ b/ioengines.c
@@ -189,12 +189,17 @@ int td_io_queue(struct thread_data *td, struct io_u *io_u)
 {
 	int ret;
 
+	if (td->io_ops->flags & FIO_SYNCIO)
+		fio_gettime(&io_u->issue_time, NULL);
 
 	if (io_u->ddir != DDIR_SYNC)
 		td->io_issues[io_u->ddir]++;
 
 	ret = td->io_ops->queue(td, io_u);
-	fio_gettime(&io_u->issue_time, NULL);
+
+	if ((td->io_ops->flags & FIO_SYNCIO) == 0)
+		fio_gettime(&io_u->issue_time, NULL);
+
 	return ret;
 }