[dpdk-dev] [PATCH v9 06/15] vhost: clear batch copy index at copy time
Maxime Coquelin
maxime.coquelin at redhat.com
Fri Jul 6 09:07:13 CEST 2018
Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
lib/librte_vhost/virtio_net.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 3bed77eec..5cc3138d0 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -141,6 +141,8 @@ do_data_copy_enqueue(struct virtio_net *dev, struct vhost_virtqueue *vq)
vhost_log_cache_write(dev, vq, elem[i].log_addr, elem[i].len);
PRINT_PACKET(dev, (uintptr_t)elem[i].dst, elem[i].len, 0);
}
+
+ vq->batch_copy_nb_elems = 0;
}
static inline void
@@ -152,6 +154,8 @@ do_data_copy_dequeue(struct vhost_virtqueue *vq)
for (i = 0; i < count; i++)
rte_memcpy(elem[i].dst, elem[i].src, elem[i].len);
+
+ vq->batch_copy_nb_elems = 0;
}
/* avoid write operation when necessary, to lessen cache issues */
@@ -564,8 +568,6 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
if (count == 0)
goto out;
- vq->batch_copy_nb_elems = 0;
-
rte_prefetch0(&vq->avail->ring[vq->last_avail_idx & (vq->size - 1)]);
avail_head = *((volatile uint16_t *)&vq->avail->idx);
@@ -1054,8 +1056,6 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id,
if (unlikely(vq->enabled == 0))
goto out_access_unlock;
- vq->batch_copy_nb_elems = 0;
-
if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
vhost_user_iotlb_rd_lock(vq);
--
2.14.4
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