From: Tiwei Bie <tiwei.bie@intel.com>
To: dev@dpdk.org, jfreiman@redhat.com
Subject: [dpdk-dev] [RFC 5/6] vhost: minor refinement
Date: Tue, 18 Jul 2017 23:40:20 +0800 [thread overview]
Message-ID: <1500392421-76672-6-git-send-email-tiwei.bie@intel.com> (raw)
In-Reply-To: <1500392421-76672-1-git-send-email-tiwei.bie@intel.com>
Manually prefetch the first desc in dequeue path.
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
---
lib/librte_vhost/virtio_net.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 0888d2b..08d53d9 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -1259,6 +1259,7 @@ vhost_dequeue_burst_1_1(struct virtio_net *dev, struct vhost_virtqueue *vq,
vq->last_used_idx = desc_idx;
if (likely(i)) {
+ rte_prefetch0(&desc[head_idx & (vq->size - 1)]);
for (desc_idx = head_idx + 1;
desc_idx != vq->last_used_idx;
desc_idx++) {
--
2.7.4
next prev parent reply other threads:[~2017-07-18 15:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-18 15:40 [dpdk-dev] [RFC 0/6] virtio1.1 prototype updates Tiwei Bie
2017-07-18 15:40 ` [dpdk-dev] [RFC 1/6] net/virtio: optimize the rx path Tiwei Bie
2017-07-18 15:40 ` [dpdk-dev] [RFC 2/6] vhost: optimize enqueue path Tiwei Bie
2017-07-18 15:40 ` [dpdk-dev] [RFC 3/6] net/virtio: optimize the tx path Tiwei Bie
2017-07-18 15:40 ` [dpdk-dev] [RFC 4/6] net/virtio: revert the changes in 18dc1b1ac Tiwei Bie
2017-07-18 15:40 ` Tiwei Bie [this message]
2017-07-18 15:40 ` [dpdk-dev] [RFC 6/6] virtio1.1: introduce the DESC_WB flag Tiwei Bie
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