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net: ngbe: change the default ITR setting

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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>
This commit is contained in:
Jiawen Wu 2025-08-21 10:34:05 +08:00 committed by Jakub Kicinski
parent 2fa1369db3
commit 6d3f753c9c
2 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/ethernet/wangxun/libwx/wx_ethtool.c
View File

@ -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 {

5
drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
View File

@ -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;