app/eventdev: switch sequence number to dynamic mbuf field

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

diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index a05d44f..3a019b7 100644 (file)
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -1493,6 +1493,7 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev,
        struct rte_vhost_iov_iter *dst_it = it_pool + 1;
        uint16_t n_free_slot, slot_idx;
        uint16_t pkt_err = 0;
+       uint16_t segs_await = 0;
        struct async_inflight_info *pkts_info = vq->async_pkts_info;
        int n_pkts = 0;
 
@@ -1541,6 +1542,7 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev,
                        dst_iovec += dst_it->nr_segs;
                        src_it += 2;
                        dst_it += 2;
+                       segs_await += src_it->nr_segs;
                } else {
                        pkts_info[slot_idx].info = num_buffers;
                        vq->async_pkts_inflight_n++;
@@ -1548,14 +1550,23 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev,
 
                vq->last_avail_idx += num_buffers;
 
+               /*
+                * conditions to trigger async device transfer:
+                * - buffered packet number reaches transfer threshold
+                * - this is the last packet in the burst enqueue
+                * - unused async iov number is less than max vhost vector
+                */
                if (pkt_burst_idx >= VHOST_ASYNC_BATCH_THRESHOLD ||
-                               (pkt_idx == count - 1 && pkt_burst_idx)) {
+                       (pkt_idx == count - 1 && pkt_burst_idx) ||
+                       (VHOST_MAX_ASYNC_VEC / 2 - segs_await <
+                       BUF_VECTOR_MAX)) {
                        n_pkts = vq->async_ops.transfer_data(dev->vid,
                                        queue_id, tdes, 0, pkt_burst_idx);
                        src_iovec = vec_pool;
                        dst_iovec = vec_pool + (VHOST_MAX_ASYNC_VEC >> 1);
                        src_it = it_pool;
                        dst_it = it_pool + 1;
+                       segs_await = 0;
                        vq->async_pkts_inflight_n += n_pkts;
 
                        if (unlikely(n_pkts < (int)pkt_burst_idx)) {