On Thu, Jan 14, 2016 at 07:19:03PM +0900, Ryota Ozaki wrote: > One possible objection should be performance > degradation, however I believe we can mitigate > by introducing polling packet processing > like Linux and FreeBSD do. Of course, we also > have to rethink existing sofint (L3 softints > and bridge_forward softint).
While I agree with the goal and also that fast-forward shouldn't stop this, I would like to see some numbers for the performance impact under load and maybe the latency change without load. Any chance to test for that? > BTW, this proposal includes another change; > move bpf_mtap to a common place, not doing it > in each driver. This change is also needed by > the above proposal to ensure to always run bpf > in softint. Be careful, there are multiple BPF hooks in some drivers, e.g. the WiFi stack. Joerg
