diff mbox

[dpdk-dev,RFC,v1,3/4] net/i40e: add TxRx tuning parameters

Message ID 20180307120851.5822-4-remy.horton@intel.com (mailing list archive)
State Superseded, archived
Headers

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Remy Horton March 7, 2018, 12:08 p.m. UTC 
  The optimal values of several transmission & reception related
parameters, such as burst sizes, descriptor ring sizes, and number
of queues, varies between different network interface devices. This
patch allows individual PMDs to specify preferred parameter values.

Signed-off-by: Remy Horton <remy.horton@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 35 ++++++++++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 508b417..4bcd05e 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -3168,6 +3168,7 @@  i40e_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 	struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	struct i40e_vsi *vsi = pf->main_vsi;
 	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(dev);
+	struct rte_eth_dev_pref_queue_info *pref_q_info;
 
 	dev_info->pci_dev = pci_dev;
 	dev_info->max_rx_queues = vsi->nb_qps;
@@ -3248,15 +3249,43 @@  i40e_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		dev_info->max_tx_queues += dev_info->vmdq_queue_num;
 	}
 
-	if (I40E_PHY_TYPE_SUPPORT_40G(hw->phy.phy_types))
+	pref_q_info = &dev_info->preferred_queue_values;
+	if (I40E_PHY_TYPE_SUPPORT_40G(hw->phy.phy_types)) {
 		/* For XL710 */
 		dev_info->speed_capa = ETH_LINK_SPEED_40G;
-	else if (I40E_PHY_TYPE_SUPPORT_25G(hw->phy.phy_types))
+		pref_q_info->nb_tx_queues = 2;
+		pref_q_info->nb_rx_queues = 2;
+		if (dev->data->nb_rx_queues == 1)
+			pref_q_info->rx_ring_size = 2048;
+		else
+			pref_q_info->rx_ring_size = 1024;
+		if (dev->data->nb_tx_queues == 1)
+			pref_q_info->tx_ring_size = 1024;
+		else
+			pref_q_info->tx_ring_size = 512;
+
+	} else if (I40E_PHY_TYPE_SUPPORT_25G(hw->phy.phy_types)) {
 		/* For XXV710 */
 		dev_info->speed_capa = ETH_LINK_SPEED_25G;
-	else
+		pref_q_info->nb_tx_queues = 1;
+		pref_q_info->nb_rx_queues = 1;
+		pref_q_info->rx_ring_size = 256;
+		pref_q_info->tx_ring_size = 256;
+	} else {
 		/* For X710 */
 		dev_info->speed_capa = ETH_LINK_SPEED_1G | ETH_LINK_SPEED_10G;
+		pref_q_info->nb_tx_queues = 1;
+		pref_q_info->nb_rx_queues = 1;
+		if (dev->data->dev_conf.link_speeds & ETH_LINK_SPEED_10G) {
+			pref_q_info->rx_ring_size = 512;
+			pref_q_info->tx_ring_size = 256;
+		} else {
+			pref_q_info->rx_ring_size = 256;
+			pref_q_info->tx_ring_size = 256;
+		}
+	}
+	pref_q_info->tx_burst_size = 32;
+	pref_q_info->rx_burst_size = 32;
 }
 
 static int