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0x13: Introducing Industry Perspective Panel
by Jamal Hadi Salim 19 Feb '19

19 Feb '19

The Industry Perspective Panel is a new session which will bring in networking industry craftsmen to discuss different topics. The primary goal is to have developers (and ops types) appreciate how Linux (networking) is used in the industry. We are not going to restrict the perspectives to be Linux only i.e a panelist does not necessarily have to use Linux in their operations, but needs to answer as to why not. The secondary goal of this session is to learn how we can do better in Linux. Both users and non-users of Linux can teach us something. The format is: - The panelist gives a presentation of their craft - questions by panelist moderator(s) - open mike to the conference At 0x13, the theme is network operations. we are looking to bring in operators of medium to large size networks of different flavors. We will be announcing them. Stay tuned. cheers, jamal

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0x13: Moonshot, The Need for Preemptive Scheduling in Microsecond-scale Systems
by Jamal Hadi Salim 17 Feb '19

17 Feb '19

That strive for microsecond-scale latencies for application level communication continues. Most purveyors of microsec solutions move datapath processing to user space so as to avoid pre-emption and have better control of latencies. Kostis Kaffes and Christos Kozyrakis argue that preemptive scheduling is infact _a good thing_. In this talk, they will describe their approach: Shinjuku Kostis and Christos will also raise the question and discuss whether these user space approaches are incrementally building full-featured operating system kernels. More info: https://netdevconf.org/0x13/session.html?talk-microsec Gentle reminder to all: Early bird registration is still open until Feb 20th. https://netdevconf.org/0x13/registration.html cheers, jamal

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0x13: Moonshot, Potential IPv4 Unicast Expansions
by Jamal Hadi Salim 17 Feb '19

17 Feb '19

There is a dollar cost to IPv4 addresses: 15 to 20 a piece and that price is going up! And, no IPv6 is still not taking over the world yet. So John Gilmore, Dave Taht and Paul Wouters want to squeeze more out of that IPv4 address space. They believe there are a few hundreds of millions of addresses that can be libertated for this good cause. They have started the march to freedom for those addresses. They have some patches already accepted into the kernel and some pending for distros, vendors, routing daemons, userland tools, etc. More info: https://www.netdevconf.org/0x13/session.html?talk-ipv4-unicast-expansions Gentle reminder to all: Early bird registration is still open until Feb 20th. https://netdevconf.org/0x13/registration.html cheers, jamal

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0x13: Moonshot, Implementing the Next Generation of Network Telemetry Technologies
by Jamal Hadi Salim 17 Feb '19

17 Feb '19

Telemetry is now an important part of networking. Standards and proposals for producing and consuming metadata are emerging. In this talk, Andy Gospodarek will introduce two such standards: INT and IFA. He will describe the hardware requirements and implementation challenges. He will propose approaches for configuring INT/IFA for the kernel and supported hardware which attempts to minimize risk associated with deploying early specs. More info: https://www.netdevconf.org/0x13/session.html?talk-nextgen-telemetry Gentle reminder to all: Early bird registration is still open until Feb 20th. https://netdevconf.org/0x13/registration.html cheers, jamal

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0x13: Moonshot, Accelerating QUIC via Hardware Offloads Through a Socket Interface
by Jamal Hadi Salim 15 Feb '19

15 Feb '19

QUIC is gaining a lot of momentum. Given QUIC implementations are in user space it is challenging to benefit from kernel-based offloads (which protocols like TCP get for free). Joshua Hay et al propose an interface to support hardware offloads used by QUIC such as cryptography and transmit segmentation. In this talk they will describe their implementation and propose APIs similar to KTLS. They will also present performance measurements and results using the chromium QUIC implementation. They hope to receive feedback and proceed to the next steps. More info: https://netdevconf.org/0x13/news.html?talk-quic-offload A gentle reminder to all: Early bird registration is still open until Feb 20th. https://netdevconf.org/0x13/registration.html cheers, jamal

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0x13: Tutorial, De-mystifying the networking relationship with Kubernetes
by Jamal Hadi Salim 14 Feb '19

14 Feb '19

For those of you container-curious, this is an opportunity to learn about how Linux networking and containers work together in Kubernetes. Mike Cambria will give a tutorial on networking Linux Containers using the Container Network Interface (CNI) and Kubernetes (k8s). The tutorial will go from basics distinguishing the model of VM vs container networking to providing an overview of k8s and CNI; along the way Mike will bring up challenges vis-a-vis linux and the effect some of the design decisions made by k8s along with some of the solutions being proposed to address some of these challenges. More info: https://netdevconf.org/0x13/session.html?tutorial-kubernetes A gentle reminder to all: Early bird registration is still open until Feb 20th. https://netdevconf.org/0x13/registration.html cheers, jamal

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0x13: TCP SO_TIMESTAMPING with OPT_STATS for performance analytics
by Jamal Hadi Salim 14 Feb '19

14 Feb '19

Nuts and bolts Talk. Debugging TCP session is tricky. While looking at aggregate TCP stats may help in some cases it falls short for use cases which require discovering and fixing latency issues in highly distributed applications. To cover such a use case, one would need to collect the kernel stack's point of view for the sessions lifetime. Merely using TCP_INFO doesnt cut it for use cases when we need to see more fine grained details for each message such as is the case for structured RPC request and response interactions. In this talk, Soheil Hassas Yeganeh and Yuchung Cheng will show how to address these issues using timestamps to track individual messages in the kernel. As a crucial extension, they will show how we to accurately capture the state of TCP using OPT_STATS for individual messages. Further, they enumerate challenges, shortcomings and gotchas of kernel timestamps when deployed at scale. More info: https://netdevconf.org/0x13/session.html?talk-tcp-timestamping A reminder to all: Early bird registration is still open until Feb 20th. https://netdevconf.org/0x13/registration.html cheers, jamal

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0x13: Nuts and bolts Talk, Veth XDP: XDP for containers
by Jamal Hadi Salim 13 Feb '19

13 Feb '19

Toshiaki Makita and William Tu will describe their effort on improving container network acceleration. The talk will go into details of both veth XDP as well as AF_XDP. More info: https://www.netdevconf.org/0x13/session.html?talk-veth-xdp A reminder to all: Early bird registration is still open until Feb 20th. https://netdevconf.org/0x13/registration.html cheers, jamal

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0x13: Moonshot, HW acceleration of XDP real world use cases
by Jamal Hadi Salim 13 Feb '19

13 Feb '19

XDP has seen great use in addressing challenges such as DDOS attack detection and prevention, stateful load balancing and more. In this talk Rony Efraim and Tal Gilboa present a solution architecture and API approach that show cases hardware-software interaction for accelerated HW XDP. Their work is based on Mellanox hardware. They hope to elicit a discussion to further look at future capabilities based on programmable adapters. More info: https://netdevconf.org/0x13/session.html?talk-hw-accel-xdp-use-cases A reminder to all: Early bird registration is still open until Feb 20th. https://netdevconf.org/0x13/registration.html cheers, jamal

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0x13: nutsnbolts, Demystifying The TC Ugly (or Universal) 32bit Key Packet Classifier
by Jamal Hadi Salim 13 Feb '19

13 Feb '19

The ugly^WBeatiful 32 bit classifier is the mother of all classifiers in the linux kernel. It is the only native classifier that can be taught by a user policy "how to" classify based on user traffic heuristics. U32 is a low level classifier operating on packet-offset-length-value. Sometimes this could be confusing for the faint-hearted. In this talk, Jamal et al are going to dig into u32 and show basic principles, expose flexibility for customization. They will then illustrate customization use cases for a small(hundreds of rules) and a medium sized (10s of thousands of rules) LAN access control and provide performance numbers. More info: https://www.netdevconf.org/0x13/news.html?talk-tc-u-classifier A reminder to all: Early bird registration is still open until Feb 20th. https://netdevconf.org/0x13/registration.html cheers, jamal

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