The NetDev conference wiki 0x13:reports

0x13:reports:d1t1t01-tcp-analytics

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 1 / Talk 1 Workshop: TCP Analytics Chair: Sowmini Varadhan Report by: Kiran Patil The goal of this session was to highlight the problems with TCP analytics, means of deployment of TCP/IP based networks and “how to monitor TCP flow efficiently

0x13:reports:d1t1t02-netlink-workshop

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 1 / Talk 2 Workshop: Netlink Workshop Chair: David Ahern and Roopa Prabhu Report by: Michael Kehoe The session presented an introduction to Netlink and it’s message structure and the need for better libraries. The presenters then looked at some past mistakes made with netlink, the issue with using netlink at scale (messages/ events). In the final part of the session, there was a deep-dive into devlink and the migration of ethtool to netlink.

0x13:reports:d1t1t03-traffic-control-workshop

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 1 / Talk 3 Workshop: Traffic Control Workshop Chair: Jamal Hadi Salim Report by: Jamal Hadi Salim This workshop is a regular fixture at the netdev conference to discuss ongoing issues, experiences, new features and proposals. contributor: Vlad Buslov topic: Unlocking TC rules update

0x13:reports:d1t1t04-hardware-offload-workshop

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 1 / Talk 4 Workshop: Hardware Offload Workshop Chair: Roopa Prabhu and Or Gerlitz Report by: Anjali Singhai During this session there were discussions relating to hardware offload starting with Switch ASIC offload updates from Roopa Prabhu, new mechanism to debug hardware datapath from Ido Schimmel, Doorbell Overflow from Ariel Elior, Qos offload for NIC eSwitch model from Pieter Jansen and Simno Horman and Scalable NIC hardware offloads from Or Gerlitz.

0x13:reports:d1t2t01-xdp-hands-on-tutorial

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 2 / Talk 1 Tutorial: XDP Hands-On Tutorial Instructors: Jesper Brouer and Toke Høiland-Jørgensen Report by: Michael Kehoe This tutorial gave an introduction to building XDP programs. It covered how to write simple programs to allow or drop traffic, collect statistics and pin BPF maps. The tutorial then went in to demonstrate how to write programs that parse, rewrite and redirect packets. This gave a great introduction into XDP and how to build towards writing real-world XDP applic…

0x13:reports:d1t2t02-de-mystifying-the-networking-relationship-with-kubernetes

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 2 / Talk 1 Tutorial: De-mystifying the networking relationship with Kubernetes Instructors: Michael Cambria Report by: Michael Kehoe This session gave an introduction to Linux Container Networking Interface (CNI) and how the container runtimes uses it. There was a deep dive discussion into some of the implementation details of plugins, especially the MULTUS plugin.

0x13:reports:d1t2t03-quic-tutorial

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 2 / Talk 3 Tutorial: QUIC Tutorial Instructors: Jana Iyengar and Ian Swett Report by: Evangelos Haleplidis Jana from Fastly, started his QUIC tutorial by going through the history of the QUIC protocol. The QUIC protocol begun at Google around 2014 and was between google services and Chrome and mobile apps. The initial results showed improvements in application performance. Now more than 35% percent of Google's egress traffic is using QUIC. QUIC was introduced to the IETF around 20…

0x13:reports:d1t2t04-netfilter-mini-workshop

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 2 / Talk 4 Workshop: Netfilter Mini-Workshop Chair: Pablo Neira and Florian Westphal Report by: Michael Kehoe In this session, the chairs outlined some basic background on Netfilter and then dived into upstream updates and discussed flowtable, flowtable bypass and finished with discussing policy HW offload.

0x13:reports:d1t2t05-the-need-for-preemptive-scheduling-in-microsecond-scale-systems

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 2 / Talk 5 Talk - Moonshot: The Need for Preemptive Scheduling in Microsecond-scale Systems Speakers: Kostis Kaffes, Christos Kozyrakis Report by: Site:

0x13:reports:d1t3t01-iot

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 3 / Talk 1 Workshop: Workshop on IoT related MAC layers, header compressions and routing protocols Chair: Stefan Schmidt Report by: Rahul Jadhav and Stefan Schmidt The support of IoT related protocols and technologies has never been the hottest topic at NetDev conferences. With the ongoing workshop series we try to engage more with the wider community and communicate our needs.

0x13:reports:d1t3t02-designing-sockets-for-u-lpwa-wireless-technologies

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 3 / Talk 2 Talk - Moonshot: Designing sockets for U-LPWA wireless technologies Speakers: Andreas Färber Report by: Site:

0x13:reports:d1t3t03-frrouting-workshop

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 3 / Talk 3 Workshop: FRRouting Workshop Chair: Donald Sharp and David Lamparter Report by: Donald Sharp The first presentation was from Donald Sharp and David Lamparter - cumulus New stuff introduced was nexthop groups (David Ahern was doing this code) and learned later on in zebra session how this is just the start.

0x13:reports:d1t3t04-an-asynchronous-dataplane-for-frr

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 3 / Talk 4 Talk – Nuts-n-Bolts: An Asynchronous Dataplane for FRR Speakers: Mark Stapp Report by: Donald Sharp This session was a follow-up from the previous FRR workshop and discussed the asynchronous data-plane / zebra. The presenter was from voltanet.io, however it was not the coder himself. The talk begun with the ZAPI -

0x13:reports:d1t4t01-wireless-workshop

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 1 / Track 4 / Talk 1 Workshop: Wireless Workshop Chair: Johannes Berg and Kalle Valo Report by: Site: Slides: Videos:

0x13:reports:d2t1t01-nvme-over-tcp-ip

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 1 / Talk 1 Talk – Nuts-n-Bolts: NVMe over TCP/IP Speakers: Roy Shterman Report by: Kiran Patil The NVMe Technical working Group has developed the standard and protocol spec for NVMe over Fabrics. Fabrics could be RDMA, Ethernet (TCP/IP), FC. The session talks about NVMe over Fabric as protocol, queueing model, reactor thread (which actually does IP processing). General idea was, how to access remote NVMe disk over network using various fabrics. This session also described fabric …

0x13:reports:d2t1t02-performance-study-of-nvme-tcp-and-nvme-roce-on-linux

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 1 / Talk 2 Talk – Nuts-n-Bolts: Performance Study of NVMe/TCP and NVMe/RoCE on Linux Speakers: Roy Shterman Report by: Kiran Patil This session covered the reasons this performance study was conducted. There is an open-source implementation for both - NVMe/RoCE and NVMe/TCP. Not every data center will have RoCE devices, but there will also be Ethernet devices. As it was known, RoCE devices are faster w.r.t. latency because of RDMA IO model but how it compared with ubiquitous Ethe…

0x13:reports:d2t1t03-implementing-the-next-generatio-of-network-telemetry-technologies

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 1 / Talk 3 Talk – Moonshot: Implementing the Next Generation of Network Telemetry Technologies Speakers: Andy Gospodarek Report by: Michael Kehoe Andy Gospodarek introduced the INT/ IFA protocols and their key components and wire protocol formats and then proposed what technologies currently exist that would help in the implementation of these new technologies.

0x13:reports:d2t1t04-xdp-offload-with-virtio-net

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 1 / Talk 4 Talk – Nuts-n-Bolts: XDP offload with virtio-net Speakers: Jason Wang Report by: Michael S. Tsirkin The talk started by summarizing the status quo: there are several points at which XDP is already helpful for virtual machines: XDP programs can be attached to and run on tap/macvtap on the host or on the virtio device on the guest. Comparing performance with running on the bare metal, virtualization incurs overhead including need for extra data copies when crossing securi…

0x13:reports:d2t1t05-dualpi2-low-latency-low-loss-and-scalable-l4s-aqm

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 1 / Talk 5 Talk – Nuts-n-Bolts: DUALPI2 - Low Latency, Low Loss and Scalable (L4S) AQM Speakers: Olga Albisser, Koen De Schepper, Bob Briscoe, Olivier Tilmans, Henrik Steen Report by: Site:

0x13:reports:d2t1t06-veth-xdp-for-containers

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 1 / Talk 6 Talk – Nuts-n-Bolts: Veth XDP: XDP for containers Speakers: Toshiaki Makita and William Tu Report by: Anjali Singhai This talk was about XDP for containers. It begun with a description about what the XDP is and then went on to discuss the generic vs native. The question raised by the presenter was that since performance wise there is little difference, what is then the point of doing native XDP for veth?

0x13:reports:d2t2t01-end-to-end-networking-with-ilnp-in-linux

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 2 / Talk 1 Talk – Moonshot: End-to-end networking with ILNP in Linux Speakers: Ryo Yanagida and Saleem Bhatti Report by: Michael Kehoe Ryo & Saleem outlined why ILNP technology is required and then discussed the new data-structures & namespaces required for ILNP to be implemented. They looked at what kernel modifications are required to implement ILNP and then performed a demo of the technology at the end of the presentation

0x13:reports:d2t2t02-implementing-the-tcp-prague-requirements-for-l4s

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 2 / Talk 2 Talk – Nuts-n-Bolts: Implementing the 'TCP Prague' Requirements for L4S Speakers: Bob Briscoe, Koen De Schepper, Olga Albisser, Joakim Misund, Olivier Tilmans, Mirja Kuehlewind, Richard Scheffenegger, Marcelo Bagnulo, Asad Ahmed Report by: Michael Kehoe

0x13:reports:d2t2t03-paced-chirping-rethinking-tcp-start-up

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 2 / Talk 3 Talk – Moonshot: Paced Chirping - Rethinking TCP start-up Speakers: Joakim Misund Report by: Site: Slides: Videos:

0x13:reports:d2t2t04-improved-syscall-batching-for-network-io

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 2 / Talk 3 Talk – Moonshot: Improved syscall batching for network I/O Speakers: Rahul Jadhav, Zhen Cao, Anmol Sarma Report by: Site: Slides: Videos:

0x13:reports:d2t2t05-shenango-achieving-high-cpu-efficiency-for-latency-sensitive-datacenter-workloads

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 2 / Talk 5 Talk – Moonshot: Shenango: Achieving High CPU Efficiency for Latency-sensitive Datacenter Workloads Speakers: Amy Ousterhout, Joshua Fried, Jonathan Behrens, Adam Belay, Hari Balakrishnan Report by: Michael Kehoe Amy described Shenago, an efficient algorithm for scheduling both latency sensitive (online) and batch-processing (offline) applications on the same host using an efficient CPU scheduling algoritmn using microsecond reprioritization. She outlined the goals of t…

0x13:reports:d2t2t06-potential-ipv4-unicast-expansions

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Track 2 / Talk 6 Talk – Moonshot: Potential IPv4 Unicast Expansions Speakers: John Gilmore, Dave Taht, Paul Wouters Report by: Site: Slides: Videos:

0x13:reports:d2t3t01-open-source-the-ietf-and-you

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Common Track / Talk 1 Talk – Keynote: Open Source, the IETF, and You Speakers: Alissa Cooper Report by: Michael Kehoe and Evangelos Haleplidis. Alissa Cooper, the chair of the IETF, was the keynote speaker. Alissa set out to talk about the relationship between open source and the IETF. She argued, in her keynote, that these are mutually supportive and that the Linux developer community and the IETF should work more closely together.

0x13:reports:d2t3t02-hw-acceleration-of-xdp-real-world-use-cases

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Common Track / Talk 2 Talk – Moonshot: HW acceleration of XDP real world use cases Speakers: Amir Ancel and Rony Efraim Report by: Anjali Singhai In this talk, Amir and Rony from Mellanox described how they made 3 lines change to Katran - an open source stateful L4 load-balancer using XDP, open sourced by Facebook and improved its performance by 46%. They were able to achieve this goal by using tc hardware offload.

0x13:reports:d2t3t03-is-reimplementation-of-network-stack-a-good-idea-or-not

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Common Track / Talk 3 Talk – Nuts-n-Bolts: Is Reimplementation of network stack a good idea or not? Speakers: Hajime Tazaki Report by: Michael Kehoe Hajime Tazaki looked at whether re-implementing the network stack is a good idea by analysising the conformance of TCP re-implementations against

0x13:reports:d2t3t04-demystifying-the-tc-ugly-or-universal-32bit-key-packet-classifier

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Common Track / Talk 4 Talk – Nuts-n-Bolts: Demystifying The TC Ugly (or Universal) 32bit Key Packet Classifier Speakers: Jamal Hadi Salim Report by: Michael Kehoe Jamal looked at the U32 classifier and how it can be used to robustly construct tc policies. Jamal looked at the implementation and uses of the u32 classifier on IXGBE hardware and their performance outcomes.

0x13:reports:d2t3t05-v-switch-live-migration-support-for-virtio-with-sriov-vf-datapath

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Common Track / Talk 5 Talk – Nuts-n-Bolts: V-switch Live-migration Support For Virtio With SRIOV VF Datapath Speakers: Or Gerlitz and Parav Pandit Report by: Mitu Aggarwal This talk started with a quick reminder to give background – SRIOV has drawbacks especially with live migration. If support for live migration is required, some solutions suggested integration with VirtIO; summarizing this in terms of how the vswitch looks and how the guest looks for this setup;

0x13:reports:d2t3t06-af-graft-a-new-address-family-for-containerized-applications

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Common Track / Talk 6 Talk – Moonshot: AF_GRAFT: A new address family for containerized applications Speakers: Ryo Nakamura Report by: Michael Kehoe Container networking is a complex subject with difficult performance overheads. Ryo Nakamura walked through AF_GRAFT, a new communications channel for containers. The talk looked at the current “State of the Art” for container networking and then looked at grafting sockets and the implementation of his work. Ryo finished with looking at per…

0x13:reports:d2t3t07-devlink-health-reporting-and-recovery-system

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Common Track / Talk 7 Talk – Nuts-n-Bolts: Devlink health reporting and recovery system Speakers: Eran Ben Elisha Report by: Michael Kehoe The Devlink health reporting API’s are a method to collect real-time information on the health of your PCI devices. Eran deep-dived into this new feature and how it can be used effectively to monitor the health of network devices.

0x13:reports:d2t3t08-skb-meta-data-extensions

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 2 / Common Track / Talk 8 Talk – Nuts-n-Bolts: Skb Meta Data Extensions Speakers: Florian Westphal Report by: Kiran Patil Since the beginning, it has been a challenge to pass additional information without increasing the size of sk_buff. This session outlines the details about how SKB meta data extensions are designed (inner working), and when to use the meta data extension.

0x13:reports:d3t1t01-making-the-linux-tcp-stack-more-extensible-with-ebpf

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Track 1 / Talk 1 Talk – Moonshot: Making the Linux TCP stack more extensible with eBPF Speakers: Viet-Hoang Tran Report by: Site: Slides: Videos:

0x13:reports:d3t1t02-ipsec-encapsulation-over-tcp

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Track 1 / Talk 2 Talk – Nuts-n-Bolts: IPsec encapsulation over TCP Speakers: Sabrina Dubroca Report by: Site: Slides: Videos:

0x13:reports:d3t1t03-bottlenecks-in-increasing-network-speeds

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Track 1 / Talk 3 Talk – Nuts-n-Bolts: Bottlenecks in increasing network speeds Speakers: Tariq Toukan Report by: Site: Slides: Videos:

0x13:reports:d3t1t04-tcp-so-timestamping-with-opt-stats-for-performance-analytics

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Track 1 / Talk 4 Talk – Nuts-n-Bolts: TCP SO_TIMESTAMPING with OPT_STATS for performance analytics Speakers: Soheil Hassas Yeganeh and Yuchung Cheng Report by: Site: Slides: Videos:

0x13:reports:d3t1t05-industry-perspectives

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Common Track / Talk 5 Panel: Industry Perspectives Panelists: Shawn Zandi (LinkedIn) Marek Majkowski (Cloudflare) Vikram Siwach (MobiledgeX) Panel co-chairs Sowmini Varadhan Roopa Prabhu Report by: Anjali Singhai This session started with the three panelists presenting their view on how Linux networking is being used in the industry, followed by questions and discussion.

0x13:reports:d3t1t06-linux-on-access-switches-requirements-and-features

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Track 1 / Talk 6 Talk – Moonshot: Linux on Access Switches: Requirements & Features Speakers: David Lamparter Report by: Site: Slides: Videos:

0x13:reports:d3t1t07-viscum-a-new-light-weight-architecture-of-mobile-edge-computing

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Track 1 / Talk 7 Talk – Nuts-n-Bolts: Viscum: A New Light Weight Architecture of Mobile Edge Computing Speakers: Feng Li, Jamal Hadi Salim, Jae Won Chung, Sriram Sridhar Report by: Site: Slides: Videos:

0x13:reports:d3t1t08-conntrack-tales-of-software-datapaths

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Common Track / Talk 8 Talk – Nuts-n-Bolts: Conntrack: tales of software datapaths Speakers: Aaron Conole, Marcelo Leitner Report by: Anjali Singhai Aaron and Marcelo from Redhat begun their talk by providing the motivation for conntrack, being a big DOS vector. However conntrack is important. They highlighted that the lack of offloaded conntrack is visible and hinders open vswitch offload, with major cloud vendors abandoning

0x13:reports:d3t1t09-p4-compiler-backend-for-tc

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Common Track / Talk 9 Talk – Moonshot: P4 Compiler Backend for TC Speakers: Marian Pritsak, Matty Kadosh Report by: Anjali Singhai During this talk, Marian from Mellanox, presented a P4 backend compiler that uses the linux TC as a P4 target architecture. He begun his talk providing an overview of the flexible hybrid pipeline and the flexible parser. He quickly moved to the P4-16 Language Elements, the parser, control blocks and match action tables. The target specific elements are the A…

0x13:reports:d3t1t10-the-core-cost-of-doing-business

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Track 1 / Talk 10 Talk – Nuts-n-Bolts: The Core Cost of Doing Business Speakers: Don Wallwork and Andy Gospodarek Report by: Site: Slides: Videos:

0x13:reports:d3t1t11-accelerating-quic-via-hardware-offloads-through-a-socket-interface

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Track 1 / Talk 1 Talk – Moonshot: Accelerating QUIC via Hardware Offloads Through a Socket Interface Speakers: Joshua Hay, Manasi Deval, Gregory Bowers, Maciej Machnikowski, Joanna Muniak, Natalia Wochtman Report by: Site: Slides: Videos:

0x13:reports:d3t1t12-xdp-based-ddos-mitigation

Anonymous (anonymous@undisclosed.example.com) — 2019-09-28T17:04:05+00:00

Day 3 / Track 1 / Talk 12 Talk – Nuts-n-Bolts: XDP based DDoS Mitigation Speakers: Arthur Fabre Report by: Site: Slides: Videos: