From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, jfreimann@redhat.com, tiwei.bie@intel.com,
zhihong.wang@intel.com, jasowang@redhat.com
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [dpdk-dev] [PATCH 4/5] vhost: remove useless prefetch for packed ring descriptor
Date: Wed, 5 Dec 2018 10:49:56 +0100 [thread overview]
Message-ID: <20181205094957.1938-5-maxime.coquelin@redhat.com> (raw)
In-Reply-To: <20181205094957.1938-1-maxime.coquelin@redhat.com>
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 --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;
--
2.17.2
next prev parent reply other threads:[~2018-12-05 9:50 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-05 9:49 [dpdk-dev] [PATCH 0/5] vhost: add missing barriers, remove useless volatiles Maxime Coquelin
2018-12-05 9:49 ` [dpdk-dev] [PATCH 1/5] vhost: enforce avail index and desc read ordering Maxime Coquelin
[not found] ` <CGME20181205113041eucas1p1943b9c13af2fb5b736ba4906b59a9cd5@eucas1p1.samsung.com>
2018-12-05 11:30 ` [dpdk-dev] [1/5] " Ilya Maximets
2018-12-06 4:17 ` Jason Wang
2018-12-06 12:48 ` Ilya Maximets
2018-12-06 13:25 ` Jason Wang
2018-12-06 13:48 ` Michael S. Tsirkin
2018-12-07 14:58 ` Ilya Maximets
2018-12-07 15:44 ` Michael S. Tsirkin
[not found] ` <CGME20181211103848eucas1p10c270ca8997fea8a2f55c2d94d02baea@eucas1p1.samsung.com>
2018-12-11 10:38 ` Ilya Maximets
2018-12-11 14:46 ` Maxime Coquelin
2018-12-05 9:49 ` [dpdk-dev] [PATCH 2/5] vhost: enforce desc flags and content " Maxime Coquelin
[not found] ` <CGME20181205133332eucas1p195b3864ed146403e314d7004d27be285@eucas1p1.samsung.com>
2018-12-05 13:33 ` [dpdk-dev] [2/5] " Ilya Maximets
2018-12-06 4:24 ` Jason Wang
2018-12-06 11:34 ` Ilya Maximets
2018-12-05 9:49 ` [dpdk-dev] [PATCH 3/5] vhost: prefetch descriptor after the read barrier Maxime Coquelin
2018-12-05 9:49 ` Maxime Coquelin [this message]
2018-12-05 9:49 ` [dpdk-dev] [PATCH 5/5] vhost: remove useless casts to volatile Maxime Coquelin
[not found] ` <CGME20181205135231eucas1p1c89281f6525a0fedab4a2fc0d2e21393@eucas1p1.samsung.com>
2018-12-05 13:52 ` [dpdk-dev] [5/5] " Ilya Maximets
2018-12-06 16:59 ` Maxime Coquelin
2018-12-07 11:16 ` Ilya Maximets
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