On Wed, Mar 08, 2017 at 11:22:01AM -0800, Eric Dumazet wrote: > On Wed, 2017-03-08 at 12:11 -0700, Subash Abhinov Kasiviswanathan wrote: > > On 2017-03-08 11:40, Eric Dumazet wrote: > > > Well, this 'optimization' actually hurts when UDP sockets are not > > > connected, since this adds an extra cache line miss per incoming > > > packet. > > > > > > (DNS servers for example) > > > > Hi Eric > > > > Thanks for your comments. Would it be preferable to disable early demux > > for the > > servers with large unconnected workloads in that case? > > Well, many servers handle both TCP and UDP. > > For TCP, there is no question about early demux, this is definitely a > win. > > We probably should have one sysctl to enable TCP early demux, one for > UDP early demux.
If early demux is a clear win for TCP then I wonder if it is unnecessary and by some leap also undesirable to have a configuration knob for that case.
