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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-09-28 00:17:17 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-29 13:25:44 -0700 |
| commit | 153f0943382e9ae0bff7caa110a1a4656088d0d4 (patch) | |
| tree | 13e8757f7347d70ad6752622309df20b00fa6f05 | |
| parent | b790e01aee74c23a5d92576177934f13aa51f718 (diff) | |
| download | kernel_samsung_smdk4412-153f0943382e9ae0bff7caa110a1a4656088d0d4.zip kernel_samsung_smdk4412-153f0943382e9ae0bff7caa110a1a4656088d0d4.tar.gz kernel_samsung_smdk4412-153f0943382e9ae0bff7caa110a1a4656088d0d4.tar.bz2 | |
ipip: enable lockless xmits
IPIP tunnels can benefit from lockless xmits, using NETIF_F_LLTX
Bench on a 16 cpus machine (dual E5540 cpus), 16 threads sending
10000000 UDP frames via one ipip tunnel (size:200 bytes per frame)
Before patch :
real 2m53.321s
user 0m10.277s
sys 46m0.597s
After patch:
real 0m32.063s
user 0m9.237s
sys 8m16.255s
Last problem to solve is the contention on dst :
16118.00 28.3% __ip_route_output_key vmlinux
6135.00 10.8% dst_release vmlinux
3220.00 5.6% ip_finish_output vmlinux
2149.00 3.8% ip_route_output_flow vmlinux
1575.00 2.8% ip_append_data vmlinux
1481.00 2.6% ip_push_pending_frames vmlinux
1349.00 2.4% __xfrm_lookup vmlinux
1216.00 2.1% csum_partial_copy_generic vmlinux
1208.00 2.1% udp_sendmsg vmlinux
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/ipip.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 9e78f11..6ad46c2 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c @@ -767,6 +767,7 @@ static void ipip_tunnel_setup(struct net_device *dev) dev->iflink = 0; dev->addr_len = 4; dev->features |= NETIF_F_NETNS_LOCAL; + dev->features |= NETIF_F_LLTX; dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; } |