From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 24 Apr 2018 14:00:23 +0000 (-0600)
Subject: engines/libaio: don't sleep for 0 reap return for 0 event check
X-Git-Tag: fio-3.7~20
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=6347e43dfbf8a30872294874ffbc98a618ac50f1;ds=sidebyside

engines/libaio: don't sleep for 0 reap return for 0 event check

If we have set iodepth_batch_complete_min to 0, then we should
not sleep for completion checking. If we do sleep, reduce the
sleep to 10usec, 100usec is a lot on modern devices.

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

diff --git a/engines/libaio.c b/engines/libaio.c
index f46b3314..dae2a70b 100644
--- a/engines/libaio.c
+++ b/engines/libaio.c
@@ -169,7 +169,8 @@ static int fio_libaio_getevents(struct thread_data *td, unsigned int min,
 			events += r;
 		else if ((min && r == 0) || r == -EAGAIN) {
 			fio_libaio_commit(td);
-			usleep(100);
+			if (actual_min)
+				usleep(10);
 		} else if (r != -EINTR)
 			break;
 	} while (events < min);