examples: adjust Rx and Tx descriptors to device limits

[dpdk.git] / examples / vhost / main.c

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 30abaec..4d1589d 100644 (file)
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -339,6 +339,19 @@ port_init(uint8_t port)
                return retval;
        }
 
+       retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &rx_ring_size,
+               &tx_ring_size);
+       if (retval != 0) {
+               RTE_LOG(ERR, VHOST_PORT, "Failed to adjust number of descriptors "
+                       "for port %u: %s.\n", port, strerror(-retval));
+               return retval;
+       }
+       if (rx_ring_size > RTE_TEST_RX_DESC_DEFAULT) {
+               RTE_LOG(ERR, VHOST_PORT, "Mbuf pool has an insufficient size "
+                       "for Rx queues on port %u.\n", port);
+               return -1;
+       }
+
        /* Setup the queues. */
        for (q = 0; q < rx_rings; q ++) {
                retval = rte_eth_rx_queue_setup(port, q, rx_ring_size,