Re: [PATCH net-next] udp: avoid one cache line miss in recvmsg()

[Eric Dumazet]

On Mon, 2016-11-21 at 22:36 +0100, Paolo Abeni wrote:

> Nice catch, thank you Eric!
> 
> This gives up to 8% speed-up in my performance test (wire speed udp flood
> with small packets)
> 
> Tested-by: Paolo Abeni <pab...@redhat.com>

Thanks Paolo

Note that udp6_recvmsg() hits the 3rd cache line of skb to access
skb->protocol :

is_udp4 = (skb->protocol == htons(ETH_P_IP));

We might some trick to avoid this cache line miss.