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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 | |
| parent | 7004bf252c53da18f6b55103e0c92f777f846806 (diff) | |
| download | linux-stable-450c4ea15ecb89567e6a75b89cbb8a598a7efb75.tar.gz linux-stable-450c4ea15ecb89567e6a75b89cbb8a598a7efb75.tar.bz2 linux-stable-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>
| -rw-r--r-- | net/8021q/vlan_dev.c | 14 | ||||
| -rw-r--r-- | net/8021q/vlanproc.c | 3 |
2 files changed, 9 insertions, 8 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); diff --git a/net/8021q/vlanproc.c b/net/8021q/vlanproc.c index 3628e0a81b40..b55a091a33df 100644 --- a/net/8021q/vlanproc.c +++ b/net/8021q/vlanproc.c @@ -279,13 +279,14 @@ static int vlandev_seq_show(struct seq_file *seq, void *offset) { struct net_device *vlandev = (struct net_device *) seq->private; const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev); - struct net_device_stats *stats = &vlandev->stats; + const struct net_device_stats *stats; static const char fmt[] = "%30s %12lu\n"; int i; if (!is_vlan_dev(vlandev)) return 0; + stats = dev_get_stats(vlandev); seq_printf(seq, "%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n", vlandev->name, dev_info->vlan_id, |