On Wed, 2016-12-07 at 06:29 -0800, Eric Dumazet wrote: > On Wed, 2016-12-07 at 08:57 +0100, Paolo Abeni wrote: > > > We have some experimental patches to implement GRO for plain UDP > > connected sockets, using frag_list to preserve the individual skb len, > > and deliver the packet to user space individually. With that I got > > ~3mpps with a single queue/user space sink - before the recent udp > > improvements. I would like to present these patches on netdev soon (no > > sooner than next week, anyway). > > > > Make sure you handle properly all netfilter helpers :(
Thank you for the head-up! UDP-GRO will be enabled by a specific netdev feature bit, disabled by default, should not impact by default any setup. > Keeping frag_list means you keep one sk_buff per segment, so this really > looks like a legacy UDP server (like a DNS server) wont benefit from > this anyway. I'm sorry, I do not follow. UDP GRO will require connected socket - very likely no DNS server. The use-case is an application using long lived UDP sockets doing a lot of traffic, like fix protocol feeds over UDP. Thank you, Paolo
