diff mbox series

[4/5] vhost: remove useless prefetch for packed ring descriptor

Message ID 20181205094957.1938-5-maxime.coquelin@redhat.com (mailing list archive)
State Superseded, archived
Delegated to: Maxime Coquelin
Headers
Series vhost: add missing barriers, remove useless volatiles |

Checks

Context Check Description
ci/Intel-compilation success Compilation OK

Commit Message

Maxime Coquelin Dec. 5, 2018, 9:49 a.m. UTC 
  This prefetch does not show any performance improvement.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 lib/librte_vhost/virtio_net.c | 2 --
 1 file changed, 2 deletions(-)
diff mbox series

Patch

diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 0a860ca72..679ce388b 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -1476,8 +1476,6 @@  virtio_dev_tx_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
 {
 	uint16_t i;
 
-	rte_prefetch0(&vq->desc_packed[vq->last_avail_idx]);
-
 	if (unlikely(dev->dequeue_zero_copy)) {
 		struct zcopy_mbuf *zmbuf, *next;