XDP Hands-On Tutorial

https://github.com/xdp-project/xdp-tutorial

by svet_0 • 6 years ago

17 4 6 years ago

ncmncm2• 6 years ago

On some NICs (e.g. Netronome), the eBPF code gets compiled to the native code of a core on the NIC and runs there before the kernel even sees the packet. How cool is that?

touisteur2• 6 years ago

Wondering whether some Mellanox NICs also have xdp offload... At 2x100Gbps I'd at least like make it help reorder, coalesce packets with application-protocol knowledge.

Anyone seen XDP use cases other than DDOS protection and firewall-like stuff?

ncmncm2• 6 years ago

I have been thinking about it for kernel-bypass CPU-bypass packet capture: DMA them directly to a big-ass hugepages-mapped ring buffer, where unprivileged user processes can then pick off interesting ones.

I use onload now, from an isolated core, but freeing up that core would be better.

XDP Hands-On Tutorial

Related Stories