netdev-dpdk: Change phy rx burst size.

Change phy rx burst size from 192 to 32. This aligns the
burst size with the other dpdk interfaces and significantly
improves performance when forwarding to dpdk vhost ports.

Signed-off-by: Kevin Traynor <kevin.traynor@intel.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>

diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index 5af15d4..cbb266d 100644 (file)
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -144,7 +144,6 @@ static const struct rte_eth_txconf tx_conf = {
     .txq_flags = ETH_TXQ_FLAGS_NOMULTSEGS|ETH_TXQ_FLAGS_NOOFFLOADS,
 };
 
-enum { MAX_RX_QUEUE_LEN = 192 };
 enum { MAX_TX_QUEUE_LEN = 384 };
 enum { DPDK_RING_SIZE = 256 };
 BUILD_ASSERT_DECL(IS_POW2(DPDK_RING_SIZE));
@@ -885,8 +884,8 @@ netdev_dpdk_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet **packets,
 
     nb_rx = rte_eth_rx_burst(rx->port_id, rxq_->queue_id,
                              (struct rte_mbuf **) packets,
-                             MIN((int)NETDEV_MAX_RX_BATCH,
-                                 (int)MAX_RX_QUEUE_LEN));
+                             MIN((int) NETDEV_MAX_RX_BATCH,
+                                 (int) MAX_PKT_BURST));
     if (!nb_rx) {
         return EAGAIN;
     }