Hi XDP-newbies and cloud-providers, I want to promote the recent excellent work by David Ahern (maintainer of several kernel networking components). Ahern explains in detail how to use XDP for lowering CPU usage (and increasing performance) on the host machine running the Cloud VMs. Making it more efficient for a cloud provider. Ahern is explaining and calling for collaboration at many levels. (Note [xxx] brackets indicate link below). His [Talk#1] at NetDevConf have not been released on [YouTube] yet, but [Slides] are available. In [Blogpost#2] you can see the results for XDP vs OVS, and to understand how CPU-overhead is measured read [Blogpost#1]. He have even released the [Code] on GitHub, and encourage people to reproduce his results. I encourage other cloud providers to collaborate with Ahern. XDP is a core kernel building block, but we need to create FOSS projects that explore different use-case (e.g xdp-cloud-provider). XDP is still early days, and as Ahern already discovered, trying out this Cloud-VMs use-case have identified several gotchas and missing XDP features that we should work on adding/fixing in upstream kernels. -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer Links: [Talk#1] XDP and the cloud: Using XDP on hosts and VMs https://netdevconf.info/0x14/session.html?tutorial-XDP-and-the-cloud [Slides] https://github.com/dsahern/bpf-progs/blob/master/docs/netdev-0x14-XDP-and-the-cloud.pdf https://github.com/dsahern/bpf-progs/raw/master/docs/netdev-0x14-XDP-and-the-cloud.pdf [Code] https://github.com/dsahern/bpf-progs [Blogpost#2]: XDP vs OVS https://people.kernel.org/dsahern/xdp-vs-ovs [Blogpost#1]: The CPU Cost of Networking on a Host https://people.kernel.org/dsahern/the-cpu-cost-of-networking-on-a-host [Talk#2] XDP Workshop https://netdevconf.info/0x14/session.html?workshop-XDP [NetDevConf]: https://netdevconf.info/0x14/ [YouTube]: https://www.youtube.com/channel/UCribHdOMgiD5R3OUDgx2qTg/videos
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