diff options
| author | Denis Pronin <dannftk@yandex.ru> | 2023-07-28 17:25:06 +0300 |
|---|---|---|
| committer | Denis Pronin <dannftk@yandex.ru> | 2023-07-28 17:25:06 +0300 |
| commit | 5c15a9111487734e448dc10359ec63c56a302938 (patch) | |
| tree | 58fe6384663541600f518e8e56b8507fa12ac470 | |
| parent | 29ba26059190bf337024b3aa0d95a12b2525cbf2 (diff) | |
| download | fio-5c15a9111487734e448dc10359ec63c56a302938.tar.gz | |
io_uring engine: 'atomic_load_relaxed' instead of 'atomic_load_acquire'
motivation here is that we do not have here any explicit READ dependency
on atomic load because actually we just need in these places only
operation to perform atomically without any explicit barriers given by
memory model
Signed-off-by: Denis Pronin <dannftk@yandex.ru>
| -rw-r--r-- | engines/io_uring.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/engines/io_uring.c b/engines/io_uring.c index e1abf6888..b361e6a5b 100644 --- a/engines/io_uring.c +++ b/engines/io_uring.c @@ -509,7 +509,7 @@ static enum fio_q_status fio_ioring_queue(struct thread_data *td, tail = *ring->tail; next_tail = tail + 1; - if (next_tail == atomic_load_acquire(ring->head)) + if (next_tail == atomic_load_relaxed(ring->head)) return FIO_Q_BUSY; if (ld->cmdprio.mode != CMDPRIO_MODE_NONE) @@ -569,7 +569,7 @@ static int fio_ioring_commit(struct thread_data *td) unsigned start = *ld->sq_ring.tail - ld->queued; unsigned flags; - flags = atomic_load_acquire(ring->flags); + flags = atomic_load_relaxed(ring->flags); if (flags & IORING_SQ_NEED_WAKEUP) io_uring_enter(ld, ld->queued, 0, IORING_ENTER_SQ_WAKEUP); |