Re: BBR and TCP internal pacing causing interrupt storm with pfifo_fast

On Mon, Oct 15, 2018 at 3:26 AM Gasper Zejn [off-list ref] wrote:

I've tried to isolate the issue as best I could. There seems to be an
issue if the TCP socket has keepalive set and send queue is not empty
and the route goes away.

https://github.com/zejn/bbr_pfifo_interrupts_issue

Hope this helps,
Gasper

This is awesome Gasper, I will take a look thanks.

Note that we are about to send a patch series (targeting net-next) to
polish the EDT patch series that was merged last month for linux-4.20.
TCP internal pacing is going to be much better performance-wise.