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vxlan: GRO support at tunnel layer

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Add calls to gro_cells infrastructure to do GRO when receiving on a tunnel.

Testing:

Ran 200 netperf TCP_STREAM instance

  - With fix (GRO enabled on VXLAN interface)

    Verify GRO is happening.

    9084 MBps tput
    3.44% CPU utilization

  - Without fix (GRO disabled on VXLAN interface)

    Verified no GRO is happening.

    9084 MBps tput
    5.54% CPU utilization

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2015-08-19 17:07:33 -07:00 committed by David S. Miller
parent b7fe10e5eb
commit 58ce31cca1
2 changed files with 8 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

9
drivers/net/vxlan.c
View file

@ -1208,7 +1208,7 @@ static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb,
stats->rx_bytes += skb->len;
u64_stats_update_end(&stats->syncp);
netif_rx(skb);
gro_cells_receive(&vxlan->gro_cells, skb);
return;
drop:
@ -2446,6 +2446,8 @@ static void vxlan_setup(struct net_device *dev)
vxlan->dev = dev;
gro_cells_init(&vxlan->gro_cells, dev);
for (h = 0; h < FDB_HASH_SIZE; ++h)
INIT_HLIST_HEAD(&vxlan->fdb_head[h]);
}
@ -2885,6 +2887,7 @@ static void vxlan_dellink(struct net_device *dev, struct list_head *head)
hlist_del_rcu(&vxlan->hlist);
spin_unlock(&vn->sock_lock);
gro_cells_destroy(&vxlan->gro_cells);
list_del(&vxlan->next);
unregister_netdevice_queue(dev, head);
}
@ -3093,8 +3096,10 @@ static void __net_exit vxlan_exit_net(struct net *net)
/* If vxlan->dev is in the same netns, it has already been added
* to the list by the previous loop.
*/
if (!net_eq(dev_net(vxlan->dev), net))
if (!net_eq(dev_net(vxlan->dev), net)) {
gro_cells_destroy(&vxlan->gro_cells);
unregister_netdevice_queue(vxlan->dev, &list);
}
}
unregister_netdevice_many(&list);

1
include/net/vxlan.h
View file

@ -161,6 +161,7 @@ struct vxlan_dev {
struct timer_list age_timer;
spinlock_t hash_lock;
unsigned int addrcnt;
struct gro_cells gro_cells;
struct vxlan_config cfg;