dpdk: High speed PMD physical NIC queue size

Large TX and RX queues are needed for high speed 10 GbE physical NICS.
Observed a 250% zero loss improvement over small NIC queue test for
port to port flow test.

Signed-off-by: Mike A. Polehn <mike.a.polehn@intel.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>

diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index 72add87..b8a71f5 100644 (file)
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -71,6 +71,9 @@ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
 
 #define NON_PMD_THREAD_TX_QUEUE 0
 
+#define NIC_PORT_RX_Q_SIZE 2048  /* Size of Physical NIC RX Queue, Max (n+32<=4096)*/
+#define NIC_PORT_TX_Q_SIZE 2048  /* Size of Physical NIC TX Queue, Max (n+32<=4096)*/
+
 /* TODO: Needs per NIC value for these constants. */
 #define RX_PTHRESH 32 /* Default values of RX prefetch threshold reg. */
 #define RX_HTHRESH 32 /* Default values of RX host threshold reg. */
@@ -372,7 +375,7 @@ dpdk_eth_dev_init(struct netdev_dpdk *dev) OVS_REQUIRES(dpdk_mutex)
     }
 
     for (i = 0; i < NR_QUEUE; i++) {
-        diag = rte_eth_tx_queue_setup(dev->port_id, i, MAX_TX_QUEUE_LEN,
+        diag = rte_eth_tx_queue_setup(dev->port_id, i, NIC_PORT_TX_Q_SIZE,
                                       dev->socket_id, &tx_conf);
         if (diag) {
             VLOG_ERR("eth dev tx queue setup error %d",diag);
@@ -381,7 +384,7 @@ dpdk_eth_dev_init(struct netdev_dpdk *dev) OVS_REQUIRES(dpdk_mutex)
     }
 
     for (i = 0; i < NR_QUEUE; i++) {
-        diag = rte_eth_rx_queue_setup(dev->port_id, i, MAX_RX_QUEUE_LEN,
+        diag = rte_eth_rx_queue_setup(dev->port_id, i, NIC_PORT_RX_Q_SIZE,
                                       dev->socket_id,
                                       &rx_conf, dev->dpdk_mp->mp);
         if (diag) {