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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/vlanproc.c | |
| parent | net: add tx_packets/tx_bytes/tx_dropped counters in struct netdev_queue (diff) | |
| download | linux-dev-450c4ea15ecb89567e6a75b89cbb8a598a7efb75.tar.xz linux-dev-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 '')
| -rw-r--r-- | net/8021q/vlanproc.c | 3 |
1 files changed, 2 insertions, 1 deletions
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, |