Kyanos: eBPF-based network issue analysis tool

Great. Now we could gain detailed insights into how our system is behaving in real time, which is invaluable for troubleshooting and optimizing performance. For those who just heard eBPF, there is the fun-damental source about it [0].

Links: [0]: https://ebpf.io/books/buzzing-across-space-illustrated-child...

Great book!

Nice nice!

Btw, I'm wondering if OFED and/or DPDK are also still used, and if they're still used for fast packet pushing.

Can't use RDMA without MOFED properly on Nvidia cards.

I think there must be still some corp frameworks that do use it extensively, but it's just not heard all that much about.

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.

Why would anyone want to read about eBPF in such a format?

By OFED I assume you are meaning RDMA and yes, it's used extensively. Not just in HPC but anywhere you are doing high performance collective communication. Frameworks like MPI, UPC/UPC++, NCCL, UCX etc are all underpinned by RDMA. Most of the AI distributed training frameworks are MPI based for example.

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.

My day job is working on a product that uses DPDK for a super high performance file system.