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| author | Eric Dumazet <dada1@cosmosbay.com> | 2009-05-18 00:35:38 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-18 15:15:06 -0700 |
| commit | 450c4ea15ecb89567e6a75b89cbb8a598a7efb75 (patch) | |
| tree | 5e99e5e58ca2e5e046d47963773ef66857bec46a /net/8021q/vlan_dev.c | |
| parent | 7004bf252c53da18f6b55103e0c92f777f846806 (diff) | |
| download | linux-450c4ea15ecb89567e6a75b89cbb8a598a7efb75.tar.gz linux-450c4ea15ecb89567e6a75b89cbb8a598a7efb75.tar.bz2 linux-450c4ea15ecb89567e6a75b89cbb8a598a7efb75.zip | |
vlan: use struct netdev_queue counters instead of dev->stats
We can update netdev_queue tx_bytes/tx_packets/tx_dropped counters instead
of dev->stats ones, to reduce number of cache lines dirtied in xmit path.
This fixes a performance problem on SMP when many different cpus take
vlan tx path.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q/vlan_dev.c')
| -rw-r--r-- | net/8021q/vlan_dev.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index 25ba41e35338..8faacee68633 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -290,7 +290,7 @@ static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) { - struct net_device_stats *stats = &dev->stats; + struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); /* Handle non-VLAN frames if they are sent to us, for example by DHCP. @@ -309,7 +309,7 @@ static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); skb = __vlan_put_tag(skb, vlan_tci); if (!skb) { - stats->tx_dropped++; + txq->tx_dropped++; return NETDEV_TX_OK; } @@ -317,8 +317,8 @@ static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) vlan_dev_info(dev)->cnt_inc_headroom_on_tx++; } - stats->tx_packets++; - stats->tx_bytes += skb->len; + txq->tx_packets++; + txq->tx_bytes += skb->len; skb->dev = vlan_dev_info(dev)->real_dev; dev_queue_xmit(skb); @@ -328,15 +328,15 @@ static int vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) { - struct net_device_stats *stats = &dev->stats; + struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); u16 vlan_tci; vlan_tci = vlan_dev_info(dev)->vlan_id; vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); skb = __vlan_hwaccel_put_tag(skb, vlan_tci); - stats->tx_packets++; - stats->tx_bytes += skb->len; + txq->tx_packets++; + txq->tx_bytes += skb->len; skb->dev = vlan_dev_info(dev)->real_dev; dev_queue_xmit(skb); |