vhost: batch small guest memory copies

[dpdk.git] / lib / librte_vhost / vhost_user.c

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index ad2e8d3..b62e382 100644 (file)
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -230,6 +230,15 @@ vhost_user_set_vring_num(struct virtio_net *dev,
                return -1;
        }
 
+       vq->batch_copy_elems = rte_malloc(NULL,
+                               vq->size * sizeof(struct batch_copy_elem),
+                               RTE_CACHE_LINE_SIZE);
+       if (!vq->batch_copy_elems) {
+               RTE_LOG(ERR, VHOST_CONFIG,
+                       "failed to allocate memory for batching copy.\n");
+               return -1;
+       }
+
        return 0;
 }
 
@@ -741,6 +750,9 @@ vhost_user_get_vring_base(struct virtio_net *dev,
        rte_free(vq->shadow_used_ring);
        vq->shadow_used_ring = NULL;
 
+       rte_free(vq->batch_copy_elems);
+       vq->batch_copy_elems = NULL;
+
        return 0;
 }