net: ngbe: change the default ITR setting

Change the default RX/TX ITR for wx_mac_em devices from 20K to 7K, which
is an experience value from out-of-tree ngbe driver, to get higher
performance on some platforms with weak single-core performance.

TCP_SRTEAM test on Phytium 2000+ shows that the throughput of 64-Byte
packets is increased from 350.53Mbits/s to 395.92Mbits/s.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Link: https://patch.msgid.link/20250821023408.53472-2-jiawenwu@trustnetic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
index c12a4cb951f68c314f39cafe7f9686ba4b70df00..d9412e55b5b21cf73784e4026203c6bed892918a 100644 (file)
--- a/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
@@ -359,10 +359,14 @@ int wx_set_coalesce(struct net_device *netdev,
        else
                wx->rx_itr_setting = ec->rx_coalesce_usecs;
 
-       if (wx->rx_itr_setting == 1)
-               rx_itr_param = WX_20K_ITR;
-       else
+       if (wx->rx_itr_setting == 1) {
+               if (wx->mac.type == wx_mac_em)
+                       rx_itr_param = WX_7K_ITR;
+               else
+                       rx_itr_param = WX_20K_ITR;
+       } else {
                rx_itr_param = wx->rx_itr_setting;
+       }
 
        if (ec->tx_coalesce_usecs > 1)
                wx->tx_itr_setting = ec->tx_coalesce_usecs << 2;
@@ -377,7 +381,7 @@ int wx_set_coalesce(struct net_device *netdev,
                        tx_itr_param = WX_12K_ITR;
                        break;
                default:
-                       tx_itr_param = WX_20K_ITR;
+                       tx_itr_param = WX_7K_ITR;
                        break;
                }
        } else {

diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
index e0fc897b0a58a2ac00c126ce8af962d00526b5c4..3fff73ae44af539603fc4b57fe3e36b222676025 100644 (file)
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
@@ -119,9 +119,8 @@ static int ngbe_sw_init(struct wx *wx)
                                                   num_online_cpus());
        wx->rss_enabled = true;
 
-       /* enable itr by default in dynamic mode */
-       wx->rx_itr_setting = 1;
-       wx->tx_itr_setting = 1;
+       wx->rx_itr_setting = WX_7K_ITR;
+       wx->tx_itr_setting = WX_7K_ITR;
 
        /* set default ring sizes */
        wx->tx_ring_count = NGBE_DEFAULT_TXD;