On Sun, 2016-06-12 at 20:51 +0300, Jonathan Morton wrote: > > On 12 Jun, 2016, at 20:48, Eric Dumazet <eric.duma...@gmail.com> wrote: > > > >> A) In my failing to make sense of all the dialog around these patches > >> ( https://lwn.net/Articles/687617/ ), it sounds like this (inbound > >> and outbound) processing are still locked to a single thread, > >> essentially? > > > > Om a router, these discussions should not matter really, since the > > workload is about receiving/sending packets without user space > > intervention (well... I do hope this !) > > Dave’s point is that inbound and outbound processing could in > principle be on *two* distinct threads, potentially doubling aggregate > throughput in a CPU-limited environment.
Only if IRQ were not properly tuned (smp_affinity) on SMP host. If you have one CPU, having two threads wont help, it will actually slow down a bit things. NAPI model already handles the 'one cpu, multiple queues/devices' quite well. _______________________________________________ Cake mailing list Cake@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/cake
