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>
This commit is contained in:
parent
7004bf252c
commit
450c4ea15e
2 changed files with 9 additions and 8 deletions
net/8021q
|
@ -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)
|
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);
|
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
|
||||||
|
|
||||||
/* Handle non-VLAN frames if they are sent to us, for example by DHCP.
|
/* 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);
|
vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
|
||||||
skb = __vlan_put_tag(skb, vlan_tci);
|
skb = __vlan_put_tag(skb, vlan_tci);
|
||||||
if (!skb) {
|
if (!skb) {
|
||||||
stats->tx_dropped++;
|
txq->tx_dropped++;
|
||||||
return NETDEV_TX_OK;
|
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++;
|
vlan_dev_info(dev)->cnt_inc_headroom_on_tx++;
|
||||||
}
|
}
|
||||||
|
|
||||||
stats->tx_packets++;
|
txq->tx_packets++;
|
||||||
stats->tx_bytes += skb->len;
|
txq->tx_bytes += skb->len;
|
||||||
|
|
||||||
skb->dev = vlan_dev_info(dev)->real_dev;
|
skb->dev = vlan_dev_info(dev)->real_dev;
|
||||||
dev_queue_xmit(skb);
|
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,
|
static int vlan_dev_hwaccel_hard_start_xmit(struct sk_buff *skb,
|
||||||
struct net_device *dev)
|
struct net_device *dev)
|
||||||
{
|
{
|
||||||
struct net_device_stats *stats = &dev->stats;
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
|
||||||
u16 vlan_tci;
|
u16 vlan_tci;
|
||||||
|
|
||||||
vlan_tci = vlan_dev_info(dev)->vlan_id;
|
vlan_tci = vlan_dev_info(dev)->vlan_id;
|
||||||
vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
|
vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb);
|
||||||
skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
|
skb = __vlan_hwaccel_put_tag(skb, vlan_tci);
|
||||||
|
|
||||||
stats->tx_packets++;
|
txq->tx_packets++;
|
||||||
stats->tx_bytes += skb->len;
|
txq->tx_bytes += skb->len;
|
||||||
|
|
||||||
skb->dev = vlan_dev_info(dev)->real_dev;
|
skb->dev = vlan_dev_info(dev)->real_dev;
|
||||||
dev_queue_xmit(skb);
|
dev_queue_xmit(skb);
|
||||||
|
|
|
@ -279,13 +279,14 @@ static int vlandev_seq_show(struct seq_file *seq, void *offset)
|
||||||
{
|
{
|
||||||
struct net_device *vlandev = (struct net_device *) seq->private;
|
struct net_device *vlandev = (struct net_device *) seq->private;
|
||||||
const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
|
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";
|
static const char fmt[] = "%30s %12lu\n";
|
||||||
int i;
|
int i;
|
||||||
|
|
||||||
if (!is_vlan_dev(vlandev))
|
if (!is_vlan_dev(vlandev))
|
||||||
return 0;
|
return 0;
|
||||||
|
|
||||||
|
stats = dev_get_stats(vlandev);
|
||||||
seq_printf(seq,
|
seq_printf(seq,
|
||||||
"%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
|
"%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
|
||||||
vlandev->name, dev_info->vlan_id,
|
vlandev->name, dev_info->vlan_id,
|
||||||
|
|
Loading…
Add table
Reference in a new issue