Recent changes (master)

[Jens Axboe <axboe@kernel.dk>]

The following changes since commit 7006d70c7c8b9a39cf3dfdd839d1975295c10527:

  Merge branch 'io_uring-numa' (2022-08-02 10:20:31 -0600)

are available in the Git repository at:

  git://git.kernel.dk/fio.git master

for you to fetch changes up to c08f9533042e909d4b4b12fdb8d14f1bc8e23dff:

  filesetup: use correct random seed for non-uniform distributions (2022-08-03 16:18:53 -0400)

----------------------------------------------------------------
Vincent Fu (3):
      examples: fix ioengine in zbd-rand-write.fio
      engines/null: fill issue_time during commit
      filesetup: use correct random seed for non-uniform distributions

 engines/null.c              | 19 +++++++++++++++++++
 examples/zbd-rand-write.fio |  2 +-
 filesetup.c                 |  2 +-
 3 files changed, 21 insertions(+), 2 deletions(-)

---

Diff of recent changes:

diff --git a/engines/null.c b/engines/null.c
index 8dcd1b21..2df56718 100644
--- a/engines/null.c
+++ b/engines/null.c
@@ -44,9 +44,28 @@ static int null_getevents(struct null_data *nd, unsigned int min_events,
 	return ret;
 }
 
+static void null_queued(struct thread_data *td, struct null_data *nd)
+{
+	struct timespec now;
+
+	if (!fio_fill_issue_time(td))
+		return;
+
+	fio_gettime(&now, NULL);
+
+	for (int i = 0; i < nd->queued; i++) {
+		struct io_u *io_u = nd->io_us[i];
+
+		memcpy(&io_u->issue_time, &now, sizeof(now));
+		io_u_queued(td, io_u);
+	}
+}
+
 static int null_commit(struct thread_data *td, struct null_data *nd)
 {
 	if (!nd->events) {
+		null_queued(td, nd);
+
 #ifndef FIO_EXTERNAL_ENGINE
 		io_u_mark_submit(td, nd->queued);
 #endif
diff --git a/examples/zbd-rand-write.fio b/examples/zbd-rand-write.fio
index 46cddd06..9494a583 100644
--- a/examples/zbd-rand-write.fio
+++ b/examples/zbd-rand-write.fio
@@ -1,4 +1,4 @@
-; Using the libaio ioengine, random write to a (zoned) block device,
+; Using the psync ioengine, random write to a (zoned) block device,
 ; writing at most 32 zones at a time. Target zones are chosen randomly
 ; and writes directed at the write pointer of the chosen zones
 
diff --git a/filesetup.c b/filesetup.c
index e0592209..3e2ccf9b 100644
--- a/filesetup.c
+++ b/filesetup.c
@@ -1495,7 +1495,7 @@ static void __init_rand_distribution(struct thread_data *td, struct fio_file *f)
 
 	seed = jhash(f->file_name, strlen(f->file_name), 0) * td->thread_number;
 	if (!td->o.rand_repeatable)
-		seed = td->rand_seeds[4];
+		seed = td->rand_seeds[FIO_RAND_BLOCK_OFF];
 
 	if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
 		zipf_init(&f->zipf, nranges, td->o.zipf_theta.u.f, td->o.random_center.u.f, seed);