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From: brenohl@br.ibm.com
To: divy@chelsio.com
Cc: netdev@vger.kernel.org, Breno Leitao <brenohl@br.ibm.com>
Subject: [PATCH] cxgb3: Set vlan_feature on net_device
Date: Wed, 18 Jul 2012 14:29:08 -0500	[thread overview]
Message-ID: <1342639748-16276-1-git-send-email-brenohl@br.ibm.com> (raw)

cxgb3 interface has a bad performance when VLAN is set. On my current
setup, a PowerLinux 7R2, I am able to get around 7 Gbps on a TCP_STREAM
(8 instances, 4k message).
With this patch, I am able to reach 9.5 Gbps.

Signed-off-by: Breno Leitao <brenohl@br.ibm.com>

diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
index abb6ce7..fcf4b31 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
@@ -3173,6 +3173,9 @@ static void __devinit cxgb3_init_iscsi_mac(struct net_device *dev)
 	pi->iscsic.mac_addr[3] |= 0x80;
 }
 
+#define TSO_FLAGS (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
+#define VLAN_FEAT (NETIF_F_SG | NETIF_F_IP_CSUM | TSO_FLAGS | \
+			NETIF_F_IPV6_CSUM | NETIF_F_HIGHDMA)
 static int __devinit init_one(struct pci_dev *pdev,
 			      const struct pci_device_id *ent)
 {
@@ -3293,6 +3296,7 @@ static int __devinit init_one(struct pci_dev *pdev,
 		netdev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM |
 			NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_HW_VLAN_RX;
 		netdev->features |= netdev->hw_features | NETIF_F_HW_VLAN_TX;
+		netdev->vlan_features |= netdev->features & VLAN_FEAT;
 		if (pci_using_dac)
 			netdev->features |= NETIF_F_HIGHDMA;
 
-- 
1.7.1

             reply	other threads:[~2012-07-18 19:29 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-18 19:29 brenohl [this message]
2012-07-18 20:12 ` [PATCH] cxgb3: Set vlan_feature on net_device Rick Jones
2012-07-19 17:50 ` David Miller
2012-07-27 18:22 brenohl
2012-07-27 18:57 ` Breno Leitao

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