[Cake] Cake vs fq_codel and c/burst on an ER-X bridge

[Sebastian Moeller]

Hi Dave,

> On Sep 11, 2018, at 10:20, Dave Taht <dave.taht at gmail.com> wrote:
> 
> What I "fixed" was on the apu2 with the burst/cburst change, I went
> from completely bottlenecked on one softirq to having 3 eat cpu, and
> from 400mbps to 900mbps. Now, that's a quad core and the e1000 (?)
> driver. The edgerouter X is a dual core, and you did see a small
> improvement in throughput, but I'd hoped for more.

Well, assuming my intuitions about how burst/cburst ameliorate the issue, we might simply have to say accept an additional 5ms delay/jitter to make it perform better. It is basically the same batching approach that always helps throughput of a cyclic process can not be repeated often enough, simply do more per iteration...

Best Regards
	Sebastian