> I'd like to see the client code, see how it manages backpressure.

That should (in theory) be handled on layer 7, not really on the network end (beyond regular TCP flow control), whereas this article is mostly about optimization on the network layer.

If you're fiddling with redis to the point where you're optimizing to use DPDK/OpenOnload/Exablaze/etc you've probably already exhausted the typical optimization paths (redis pipelining, tuning your queries, potentially implementing a stripped down client library implementing RESP, etc).