[ovs-dev] PATCH [1/1] High speed PMD physical NIC queue size, resubmit

[Polehn, Mike A]

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 
A port to port flow test.

Signed-off-by: Mike A. Polehn <mike.a.polehn at intel.com>

diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index fbdb6b3..d1bcc73 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -70,6 +70,9 @@ 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 (n*32<4096)*/
+#define NIC_PORT_TX_Q_SIZE 2048  /* Size of Physical NIC TX Queue (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. */
@@ -369,7 +372,7 @@ 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);
@@ -378,7 +381,7 @@ 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) {