From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 9 Oct 2017 16:11:19 +0000 (-0600)
Subject: engines/filecreate: set FIO_NOSTATS flag
X-Git-Tag: fio-3.2~57
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=132b1ee42e63a5ca369d94d33d2a7337741d7458;p=fio.git

engines/filecreate: set FIO_NOSTATS flag

Before this change, we bundle the fake IO latencies with the file
open latencies. That's not intended. Add a flag for IO engines to
tell the core to ignore any IO latencies.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/engines/filecreate.c b/engines/filecreate.c
index 171dcc95..01f7d68f 100644
--- a/engines/filecreate.c
+++ b/engines/filecreate.c
@@ -76,7 +76,8 @@ static struct ioengine_ops ioengine = {
 	.get_file_size	= get_file_size,
 	.open_file	= open_file,
 	.close_file	= generic_close_file,
-	.flags		= FIO_DISKLESSIO | FIO_SYNCIO | FIO_FAKEIO,
+	.flags		= FIO_DISKLESSIO | FIO_SYNCIO | FIO_FAKEIO |
+				FIO_NOSTATS,
 };
 
 static void fio_init fio_filecreate_register(void)
diff --git a/io_u.c b/io_u.c
index 58c23202..fb4180a3 100644
--- a/io_u.c
+++ b/io_u.c
@@ -1779,7 +1779,7 @@ static void account_io_completion(struct thread_data *td, struct io_u *io_u,
 	if (td->parent)
 		td = td->parent;
 
-	if (!td->o.stats)
+	if (!td->o.stats || td_ioengine_flagged(td, FIO_NOSTATS))
 		return;
 
 	if (no_reduce)
diff --git a/ioengines.h b/ioengines.h
index 177cbc05..e744f3f8 100644
--- a/ioengines.h
+++ b/ioengines.h
@@ -59,6 +59,7 @@ enum fio_ioengine_flags {
 	FIO_MEMALIGN	= 1 << 9,	/* engine wants aligned memory */
 	FIO_BIT_BASED	= 1 << 10,	/* engine uses a bit base (e.g. uses Kbit as opposed to KB) */
 	FIO_FAKEIO	= 1 << 11,	/* engine pretends to do IO */
+	FIO_NOSTATS	= 1 << 12,	/* don't do IO stats */
 };
 
 /*