Links: [0]: https://ebpf.io/books/buzzing-across-space-illustrated-child...
Btw, I'm wondering if OFED and/or DPDK are also still used, and if they're still used for fast packet pushing.
OFED is less of a thing now because most of the work has gone upstream, both into the kernel and into the rdma-core userland.
Also worth mentioning that MLNX_OFED (sometimes called MOFED) is now being transitioned into DOCA-Host. This is mostly because of that aforementioned upstreaming and the move towards more SmartNIC stuff (ala Bluefield) being the focus as core RDMA support is mostly provided by upstream.
Some examples, (Broadcom) Vmware NSX-T gateways, Alivaba used to use it, and a lot of extreme HFT use it too, mostly to reduce latency and manipulate tcp.