From: Jens Axboe <jens.axboe@oracle.com>
Date: Thu, 16 Oct 2008 18:33:51 +0000 (+0200)
Subject: Only memcpy last issue time when using iolog replay
X-Git-Tag: fio-1.23~8
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d0c153284c1e6505e711c71e6412e6fef02853b8;p=fio.git

Only memcpy last issue time when using iolog replay

Part of a series that'll allow switching off various time measurements
to avoid impacting system performance too much.

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

diff --git a/ioengines.c b/ioengines.c
index e447539c..1688c633 100644
--- a/ioengines.c
+++ b/ioengines.c
@@ -227,7 +227,12 @@ int td_io_queue(struct thread_data *td, struct io_u *io_u)
 
 	if (td->io_ops->flags & FIO_SYNCIO) {
 		fio_gettime(&io_u->issue_time, NULL);
-		memcpy(&td->last_issue, &io_u->issue_time,
+
+		/*
+		 * only used for iolog
+		 */
+		if (td->o.read_iolog_file)
+			memcpy(&td->last_issue, &io_u->issue_time,
 					sizeof(struct timeval));
 
 		/*
@@ -272,8 +277,13 @@ int td_io_queue(struct thread_data *td, struct io_u *io_u)
 
 	if ((td->io_ops->flags & FIO_SYNCIO) == 0) {
 		fio_gettime(&io_u->issue_time, NULL);
-		memcpy(&td->last_issue, &io_u->issue_time,
-				sizeof(struct timeval));
+
+		/*
+		 * only used for iolog
+		 */
+		if (td->o.read_iolog_file)
+			memcpy(&td->last_issue, &io_u->issue_time,
+					sizeof(struct timeval));
 
 		/*
 		 * async engine, set the timeout here