On Mon, 2017-03-20 at 09:18 -0700, Eric Dumazet wrote: > Interesting. > > UDP ipv4 xmit path gets a ~25 % improvement on PPC with this patch. > > ( 20 concurrent netperf -t UDP_STREAM : 2.45 Mpps -> 3.07 Mpps ) Well, there _is_ a difference, but not 25 % (this was probably caused by different queues on TX or RX between my reboots). I added a sysctl hack to be able to dynamically change on a given workload, and we hit other bottlenecks (mainly qdisc locks and driver tx locks) anyway.
