On Fri, May 17, 2019 at 8:20 PM Jakub Kicinski <jakub.kicinski@xxxxxxxxxxxxx> wrote: > > On Thu, 16 May 2019 14:37:51 +0200, Magnus Karlsson wrote: > > Applications > > method cores irqs txpush rxdrop l2fwd > > --------------------------------------------------------------- > > r-t-c 2 y 35.9 11.2 8.6 > > poll 2 y 34.2 9.4 8.3 > > r-t-c 1 y 18.1 N/A 6.2 > > poll 1 y 14.6 8.4 5.9 > > busypoll 2 y 31.9 10.5 7.9 > > busypoll 1 y 21.5 8.7 6.2 > > busypoll 1 n 22.0 10.3 7.3 > > Thanks for the numbers! One question that keeps coming to my mind > is how do the cases compare on zero drop performance? > > When I was experimenting with AF_XDP it seemed to be slightly more > prone to dropping packets than expected. I wonder if you're seeing > a similar thing (well drops or back pressure to the traffic generator)? > Perhaps the single core busy poll would make a difference there? Good question. I will run the experiments and see what we get. /Magnus
