Virtio, vhost, vhost-user, vsock, etc. - Lencerf's Walk
Virtio, vhost, vhost-user, vsock, etc. May 28, 2023 In virtualization technologies, there are a lot of terminologies starting with letter v, this article gives a very brief introduction to these words from my understandings. Checks the links at the end for more details. Virtio and virtqueue Virtio1 is a standard2 to implement virtual devices. The name comes from “virtual IO”. A virtual device is d
Understanding tc “direct action” mode for BPF
A “direct-action” Mode for TC Back to the Basics Hooking eBPF Programs Concept of the “direct-action” The “clsact” Qdisc Example Usage The Code Conclusion References This post was left aside as a draft for a long time. Most of it was written in August 2016, at a time when no documentation for the direct-action mode for TC was available. It is probably less relevant today, but I publish it in case
How to Code Raw Sockets in C on Linux
Raw tcp sockets in C Raw sockets can be used to construct a packet manually inside an application. In normal sockets when any data is send over the network, the kernel of the operating system adds some headers to it like IP header and TCP header. So an application only needs to take care of what data it is sending and what reply it is expecting. But there are other cases when an application needs
netdev in 2024
Developments in Linux kernel networking accomplished by many excellent developers and as remembered by Andew L, Eric D, Jakub K and Paolo A. Another busy year has passed so let us punctuate the never ending stream of development with a retrospective of our accomplishments over the last 12 months. The previous, 2023 retrospective has covered changes from Linux v6.3 to v6.8, for 2024 we will cover L
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The New AI Networks | Ultra Ethernet UEC | UALink vs Broadcom Scale Up Ethernet SUE
https://community.netapp.com/t5/Tech-ONTAP-Blogs/NFSv3-and-NFSv4-What-s-the-difference/ba-p/441316
A journey to the vhost-users realm
eBPF Networking Techniques - Packet Redirection | who.ldelossa.is
Intel Gaudi RDMA PerfTest Tool — Gaudi Documentation 1.21.1 documentation
https://blogs.oracle.com/linux/post/network-interface-transmission-queue-timeout
Disable kernel processing of TCP packets for raw socket
The RAW socket C programming tutorial with working program examples tested on Linux OS
https://www.datacenterdynamics.com/en/news/changing-linux-code-could-cut-data-center-energy-use-by-30-researchers-claim/
How to modify TCP congestion algorithm?
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OCI accelerates HPC, AI, and database using RoCE and NVIDIA ConnectX
Virtqueues and virtio ring: How the data travels
NCCL Performance Impact with PCIe Relaxed Ordering | Microsoft Community Hub
https://cs.newpaltz.edu/~easwarac/CCN/Week9/tcpCongestionExercises_Solutions.html
Introduction to Programming Infiniband RDMA