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0x12: nuts 'n bolts Talk! Building a Better NOS with Linux and Switchdev
by Jamal Hadi Salim 15 May '18

15 May '18

Another exciting talk from the program committee Amen to the Whitebox! Whitebox! Whitebox! chants. But the emerging creed of "Open" networking operating systems (NOS) is sadly still plagued with ASIC vendor SDKs and the proprietary and legacy baggage they carry. Vendor SDKs quarks impact control performance and dictate how control and datapath APIs look like. The SDK glue creates undue burden on operational interfaces design: config, debug-ability, and monitoring all suffer just so the NOS can adapt to the many every vendor SDKs. The switchdev and related hardware offload interfaces revolution in Linux have matured over the last few years. They provide a singular, cleaner interface to ASIC features. No different than other hardware offloaded by Linux - the hardware vendor provides a driver and leaves the innovation to the NOS and applications. Shrijeet Mukherjee and David Ahern have been in the dragons den of vendor SDKs and have come out scathed but wiser. In this talk they will discuss typical software architectures for a NOS and introduce a path for transitioning SDK based solutions to Switchdev and related offloads. More info: https://www.netdevconf.org/0x12/session.html?building-a-better-nos-with-lin… cheers, jamal PS: Another reminder, early bird registration (currently 20% off will go up on June 1st).

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0x12: Moonshot Talk! Developing and Deploying a TCP Replacement for the Web
by Jamal Hadi Salim 14 May '18

14 May '18

Is TCP - at 44 - too old, slow and has bad habits that cant be fixed? Does shaving a few milliseconds of latency on a web transaction matter that much to call out for a new transport? The new kid on the block, QUIC thinks so. QUIC has been globally deployed at Google on thousands of servers. If you are running chrome as a browser and using YouTube, you are likely using QUIC. Estimates are 7% of the internet traffic is now QUIC. In this talk Jana Iyengar and Ian Swett will provide an overview of QUIC, its motivations and the performance improvements observed at Google. They will discuss performance bottlenecks in Linux kernel UDP that were seen at Google's servers, what was done to overcome them and what work remains to be done in the kernel as QUIC becomes more widely deployed. More info: https://www.netdevconf.org/0x12/session.html?developing-and-deploying-a-tcp… cheers, jamal PS: Another reminder, early bird registration (currently 20% off will go up on June 1st).

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0x12: Nuts-n-Bolts Workshop! Traffic Control
by Jamal Hadi Salim 11 May '18

11 May '18

First Workshop announcement! Jamal Hadi Salim will chair a working session with face to face discussions on different Traffic Control topics. https://www.netdevconf.org/0x12/session.html?tc-workshop cheers, jamal PS: Speaking in the third person is allowed. Reminder again: Early bird registration closes on June 1st.

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0x12: Nuts-n-Bolts Talk! Suricata, an XDP adventure
by Jamal Hadi Salim 10 May '18

10 May '18

The program committee has accepted another exciting talk! Suricata is a widely deployed open source IDS/IPS/NSM. Suricata 4.1 will include eBPF and XDP support. In this respect, Suricata is amongst pioneers to deploy these technologies in a production environment. The journey to get to eBPF and XDP support and remove the cobwebs took about 2 years. Eric Leblond will describe some of the challenges met and how they were addressed to get to production level quality. More info: https://www.netdevconf.org/0x12/session.html?suricata-an-xdp-adventure cheers, jamal PS:- Another reminder that: 1) Registration early bird deadline (before prices go up) is June 1st. 2) We do offer bursaries for attending the conference.

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0x12: First Sponsor, Cumulus!
by Jamal Hadi Salim 09 May '18

09 May '18

Cumulus Networks has been a solid supporter of the Netdev conference since 0.1! We appreciate and welcome them back as a Gold Sponsor for Netdev conf 0x12. https://www.netdevconf.org/0x12/news.html?gold-sponsor-cumulus cheers, jamal Again reminder: 1) June 1st is the deadline for early bird cheaper registration fees. 2) We do have bursaries for folks who need help getting to the conference.

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0x12: Hands on! Introduction to FRRouting
by Jamal Hadi Salim 08 May '18

08 May '18

In this 1.5 hour instructor-led tutorial, Donald Sharp(FRRouting maintainer) will start by introducing the FRRouting Suite to the unitiated. He will then guide us into a basic network configuration. In the second half of the tutorial, Donald will delve deeper into more advanced features on how FRR fits into the classic Data Centre architecture. https://www.netdevconf.org/0x12/session.html?introduction-to-frrouting cheers, jamal PS:- Reminder: Early bird registration offer ends June 1st.

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0x12: Moonshot Talk! A PCC-Vivace Kernel Module for Congestion Control
by Jamal Hadi Salim 07 May '18

07 May '18

Folks, Nathan Jay et al assert that there is no one-size-fits-all TCP congestion control algorithm. Different apps have different goals for their service lifetimes: Streaming video apps are sensitive to bandwidth fluctuations, voice chats desire low latency and bulk transfers only care about completion time. Varying link characteristics add another dimension to a congestion control algorithm: hardwired assumptions about the cause of packet loss or measured latency inflation can lead to reduced application performance. PCC-Vivace was created to address these issues. PCC-Vivace congestion control algorithm provides an explicit utility function that allows developers to provide weights to different performance metrics like throughput, latency, packet loss and jitter. PCC-Vivace's online learning framework also allows it to adapt to a variety of network conditions, consistently delivering high performance. The talk will discuss the challenges of implementing PCC-Vivace in the Linux kernel. Nathan will present initial results comparing the performance of Vivace with other existing Linux congestion controllers(BBR etc). The talk will also demonstrate the implementation's flexibility by creating and testing a variety of utility functions. More info at: https://www.netdevconf.org/0x12/session.html?a-pcc-vivace-kernel-module-for… cheers, jamal

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0x12: NutsNBolts Talk! Challenges migrating from NDIV to XDP
by Jamal Hadi Salim 04 May '18

04 May '18

HAProxy is a well known high performance TCP/HTTP load balancer used as a front end to applications by many very-large sites. Often HAProxy is stationed at the frontiers of the wild wild ^Wwest internet in the defense against DDOS - and at the heart of the storm sits PacketShield. PacketShield is built using NDIV. NDIV has been deployed very effectively todate and handles the intended line-rate 10Gbps processing under a variety of hostile real-world DDOS attacks. Willy Tarreau and Emeric Brun have been contemplating migrating NDIV to use XDP. In this talk they will describe what NDIV does well and what is currently lacking with XDP to make it convincing to make the jump. More details: https://www.netdevconf.org/0x12/session.html?challenges-migrating-from-ndiv… Reminder: Early bird registration expires on June 1st. cheers, jamal

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0x12: Nuts-and-bolts Talk: Using eBPF for RDS filtering
by Jamal Hadi Salim 03 May '18

03 May '18

Tushar Dave will share his experiences in implementing Reliable Datagram Socket (RDS) filtering and firewalling. RDS sits on top of both TCP and IB, which presents a challenge: while TCP deals with skbs, IB/RDMA deals with scatterlists. Traditional firewalling with netfilter deals only with skbs. Tushar is looking for a unified solution for both TCP and IB. To this end he is adding/extending eBPF helpers to process messages that are in the form of struct scatterlist. https://www.netdevconf.org/0x12/session.html?using-ebpf-for-rds-filtering Reminder: Early bird registration expires on June 1st. cheers, jamal

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0x12 Call for Submissions Extended!
by Jamal Hadi Salim 02 May '18

02 May '18

Procrastinators, you have been given a lifeline! The Call For Submissions for Netdev 0x12 has been extended to Monday, May 20, 2018. Netdev 0x12 conference has a single blind review. On how to participate see: https://netdevconf.org/0x12/submit-proposal.html cheers, jamal

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