[dpdk-dev] [RFC 29/29] vhost: update and return descs in batch
Tiwei Bie
tiwei.bie at intel.com
Wed Jun 21 04:58:05 CEST 2017
Signed-off-by: Tiwei Bie <tiwei.bie at intel.com>
---
lib/librte_vhost/virtio_net.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 8344bcb..7f76b1a 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -604,8 +604,6 @@ enqueue_pkt(struct virtio_net *dev, struct vring_desc_1_1 *descs,
if (unlikely(desc->len < dev->vhost_hlen) || !desc_addr)
return -1;
- desc->len = m->pkt_len + dev->vhost_hlen;
-
rte_prefetch0((void *)(uintptr_t)desc_addr);
hdr = (struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)desc_addr;
@@ -699,11 +697,15 @@ vhost_enqueue_burst_1_1(struct virtio_net *dev, uint16_t queue_id,
count = i;
if (count) {
- rte_smp_wmb();
- for (i = 0; i < count; i++) {
+ for (i = 1; i < count; i++) {
idx = (head_idx + i) & (vq->size - 1);
+ desc[idx].len = pkts[i]->pkt_len + dev->vhost_hlen;
desc[idx].flags &= ~DESC_HW;
}
+ desc[head_idx & (vq->size - 1)].len =
+ pkts[0]->pkt_len + dev->vhost_hlen;
+ rte_smp_wmb();
+ desc[head_idx & (vq->size - 1)].flags &= ~DESC_HW;
}
return count;
--
2.7.4
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