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0x15: Conference open for testing
by Jamal Hadi Salim 06 Jul '21

06 Jul '21

The conference officially opens tomorrow but we have opened it up today so people can test their environment. Come meet and greet different people you have not seen in a while. We also have a Help Desk table you can drop by if you have questions. We have links for Attendee and Speaker Guides in case you need to debug something: Attendees guides: ----------------- 1) Technical requirements https://help.airmeet.com/support/solutions/articles/82000443161-what-are-th… 2)Guide https://help.airmeet.com/support/solutions/articles/82000480786-step-by-ste… More general info: https://help.airmeet.com/support/solutions/folders/82000324183 Speakers guides: ---------------- 1) Technical Instructions https://help.airmeet.com/support/solutions/articles/82000477762-what-are-th… 2) Guide https://help.airmeet.com/support/solutions/articles/82000452070-step-by-ste… More general info: https://help.airmeet.com/support/solutions/folders/82000324171 cheers, jamal

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0x15: Community Sponsor, IPsec and Network Security Association!
by Jamal Hadi Salim 06 Jul '21

06 Jul '21

We are happy to announce our first community sponsor: The IPsec and Network Security Association! Thank you for your support. What is the IPsec and Network Security Association? The aim of the IPsec and Network Security e.V. (see: https://linux-ipsec.org/) is to build a strong open source/protocol community to make network security ready for the next generation. The activities shall extend and support the work of standardization organizations with respect to real world implementation and use cases on open source operating systems. Network security technologies became increasingly important over recent years. In the view of professional attacks against the core network infrastructure happening these days, network security technologies must be continously developed to make the network infrastructure futureproof. IPsec as the major layer 3 network security protocol plays an important role in securing todays network. However, as networks continue to become more and more complex, network security technologies, like IPsec, must keep up with that increasing complexity. cheers, jamal

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0x15: Industry Perspectives Panel: Vendor Perspective On Smart NICs
by Jamal Hadi Salim 03 Jul '21

03 Jul '21

We are happy to announce that the Industry Perspectives Panel will be held on July 19th at 5:50 UTC. For Netdev conf 0x15 we will get the NIC vendor's perspective on Smart NICs. Smart NICs are a new emerging type of NICs which have built in processors alongside rich ASIC-based packet processing pipelines. The tradition of the Industry Perspectives is to maintain an open mind so contrarian perspectives are accepted; for example: A vendor is allowed to say Smart NICs are a bad idea as long as they back their claim or that they dont support or want to support Linux within the NIC. By Linux we mean the Linux kernel network stack of course. Then the questions is: What are the requirements that Linux needs to support to turn around any skeptical vendor? For vendors supporting Linux, what is the format in which the kernel running within the NIC operates and interacts with the host? What is offloaded from within the NIC's kernel vs the host's? The panel format is a few technical slides from each vendor describing the features they offer, their differentiation and if they support Linux the interaction with Linux. This is followed by questions from the panel and then an open floor for audience Q&A. We will be providing more information as to which vendors will be participating in the next few days. cheers, jamal

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little poll for switchdev users
by Alexander Zubkov 02 Jul '21

02 Jul '21

Hello everybody! I'll have a talk during Netdev 0x15 about how the life with Switchdev looks like. It'll be at the Switchdev Offload Workshop. And I want to collect some statistics to share during my talk. If you use switches with switchdev-based driver, I invite you to fill out a short form. I will not take much time. There are only 4 simple questions and only one is required. https://forms.gle/FZNVFJ5EgkAyzR7DA PS. If you wonder how people use Switchdev in real life, I welcome you on my talk! Of course, people already using switchdev are welcome too - you'll have your bit of sympathy!

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0x15: Schedule out!
by Jamal Hadi Salim 01 Jul '21

01 Jul '21

We are pleased to announce the tentative schedule for 0x15. There may be some minor changes going forward, if any, but the overall theme will remain. For both registration and schedule for now go to: https://netdevconf.info/0x15/virtual.html This time we have good integration with calendar systems so should be easy to add to google calendar, etc. Also one nice feature in the Airmeet system this time is we are trying a setup such that if you miss a session because you are busy you can login and play the videos. As usual, once the videos are cleaned up they will be uploaded to youtube. cheers, jamal

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0x15: Bronze sponsor, NVIDIA!
by Jamal Hadi Salim 01 Jul '21

01 Jul '21

We are pleased to welcome NVIDIA (https://www.nvidia.com/) as a bronze sponsor for Netdev conf 0x15! NVIDIA is the leader in open networking with end-to-end solutions for SmartNICs, DPUs, open optics, and accelerated data center switches. NVIDIA is committed to open-source at all layers of the software and hardware stack with open networking initiatives like Linux Networking, SwitchDev, DENT, and the SONiC network operating systems and believes that open-source has the power to accelerate innovation and benefits everyone. cheers, jamal

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0x15: New Talk accepted!
by Jamal Hadi Salim 01 Jul '21

01 Jul '21

Tom Herbert is still on a quest to speed up the network stack[1]. In this talk he introduces the PANDA parser with intention to replace the venerable Linux kernel Flow Dissector. Tom says the flow dissector is hard coded, convoluted making it both hard to extend and hard to maintain. (yes, he is guilty as well having been one of the originators of the flow dissector). PANDA parser is a domain specific parser that lives under the philosophy of "write once, run anywhere, run well". Unlike Flow Dissector, a PANDA Parser with metadata extraction is written in a declarative representation as opposed to imperative instructions - all in familiar C. It has been shown that while more flexible, the PANDA parser is more performant than flowdissector. The PANDA parser may be compiled to different backends, currently two implemented backends are available: an optimized userspaces C and an XDP/eBPF one. There is ongoing work on generating a plain kernel version as well which may be consumed by other part of the kernel. For any of those 3 backends, the parser definition stays unchanged. [1]https://legacy.netdevconf.info/0x14/session.html?talk-BP4-byte-code-for-programmable-protocol-independent-PDU-processing More info: https://netdevconf.info/0x15/session.html?Replacing-Flow-Dissector-with-PAN… cheers, jamal PS: Registration is open, see: https://netdevconf.info/0x15/registration.html PPS: We are looking to post the schedule today

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0x15: New Talk accepted!
by Jamal Hadi Salim 01 Jul '21

01 Jul '21

Marcelo Leitner and Vlad Buslov will discuss turbo-charging the TC flower control interface and the evolution of the work that went into it over a period of two years: At least one hundred kernel patches, many changes to user space and increase in performance by a magnitude. To the datapath skeptics who are wondering why optimize the control path (reminds of the joke from not-to-be-named kernel guy under the influence "Why do we need userspace at all?"): You do care if you are constantly churning or accessing the datapath. Example workloads: - short lived container workloads where you have to add/delete access control rules, - telco environments, where efficient rule statistics are critical billing - etc. cheers, jamal PS: Registration is open, see: https://netdevconf.info/0x15/registration.html PPS: We are looking to post the schedule today

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0x15: New Talks accepted!
by Jamal Hadi Salim 30 Jun '21

30 Jun '21

1) Alex Aring asks if you are paying attention to socket ECONNRESET. Big consequences if you are trying to be reliable as Alex et al recently found with the kernel Distributed Lock Manager (DLM) protocol. In this talk he will make suggestions on changes that make this less painful. More info: https://netdevconf.info/0x15/session.html?ECONNRESET-on-a-reliable-socket-a… 2) sFlow is an established industry standard for real-time network monitoring which has seen wide adoption in switching ASICs. In this talk Peter Phaal, Neil McKee, Ido Schimmel, Roopa Prabhu, and Andy Roulin will delve into how sFlow can be used to monitor a data center components ranging from switches to VMs. They will discuss sFlow data formats and their recent extensions. More info: https://netdevconf.info/0x15/session.html?Network-wide-visibility-with-Linu… 3)Simon Horman will discuss the new enhancements to the TC police action to add packet based control. He will describe how the feature gets offloaded and how it gets to have its own lifecycle independent of the classifier. More info: https://netdevconf.info/0x15/session.html?Recent-Enhancements-to-the-TC-Pol… 4) New feature testing or bug reproduction can be cumbersome as one embarks on creating network environment scripts - defining network namespaces, setting up different network interfaces types, assigning addresses, configuring routes, vrfs, etc.. All this is tedious and error prone and often frustrating. Eyal Birger introduces netpen.io to will save your valuable time ane energy. More info: https://netdevconf.info/0x15/session.html?netpen.io-visual-editor-for-netwo… cheers, jamal

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0x15: New Talk accepted!
by Jamal Hadi Salim 29 Jun '21

29 Jun '21

New talk accepted by the illustrious PC. Marta Plantykow, Milena Olech and Maciej Machnikowski are back again discussing network infrastructure performance tweaking using AI[1][2], this time with a focus on PTP protocol. Network cards that are equipped with PTP Hardware Clock (PHC) rely on the PTP protocol to synchronize. There is that additional step of synchronizing the system time to the PHC. Linux ptp applications use a feedback control system (PI controller) to even out timing errors. In this talk Marta et al use a genetic algorithm (GA), a stochastic algorithm used in the AI world, to optimize the parameters of the PI controller. They explore different approaches to solve the optimization, various data evaluation methods and results achieved. Come hear, and engage them. cheers, jamal PS: Registration is now open - see : https://netdevconf.info/0x15/registration.html PPS: We are working on the schedule, coming RSN.

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