An Introduction to eBPF (and cBPF). Topics covered include history, implementation, program types & maps. Also gives a brief introduction to XDP and DPDK
Video: https://www.facebook.com/atscaleevents/videos/1693888610884236/ . Talk by Brendan Gregg from Facebook's Performance @Scale: "Linux performance analysis has been the domain of ancient tools and metrics, but that's now changing in the Linux 4.x series. A new tracer is available in the mainline kernel, built from dynamic tracing (kprobes, uprobes) and enhanced BPF (Berkeley Packet Filter), aka, eBPF. It allows us to measure latency distributions for file system I/O and run queue latency, print details of storage device I/O and TCP retransmits, investigate blocked stack traces and memory leaks, and a whole lot more. These lead to performance wins large and small, especially when instrumenting areas that previously had zero visibility. This talk will summarize this new technology and some long-standing issues that it can solve, and how we intend to use it at Netflix."
Kernel Recipes 2019 - No NMI? No Problem! – Implementing Arm64 Pseudo-NMIAnne Nicolas
As the name would suggest, a Non-Maskable Interrupt (NMI) is an interrupt-like feature that is unaffected by the disabling of classic interrupts. In Linux, NMIs are involved in some features such as performance event monitoring, hard-lockup detector, on demand state dumping, etc… Their potential to fire when least expected can fill the most seasoned kernel hackers with dread.
AArch64 (aka arm64 in the Linux tree) does not provide architected NMIs, a consequence being that features benefiting from NMIs see their use limited on AArch64. However, the Arm Generic Interrupt Controller (GIC) supports interrupt prioritization and masking, which, among other things, provides a way to control whether or not a set of interrupts can be signaled to a CPU.
This talk will cover how, using the GIC interrupt priorities, we provide a way to configure some interrupts to behave in an NMI-like manner on AArch64. We’ll discuss the implementation, some of the complications that ensued and also some of the benefits obtained from it.
Julien Thierry
HKG18-411 - Introduction to OpenAMP which is an open source solution for hete...Linaro
Session ID: HKG18-411
Session Name: HKG18-411 - Introduction to OpenAMP which is an open source solution for heterogeneous system orchestration and communication
Speaker: Wendy Liang
Track: IoT, Embedded
★ Session Summary ★
Introduction to OpenAMP which is an open source solution for heterogeneous system orchestration and communication
---------------------------------------------------
★ Resources ★
Event Page: http://connect.linaro.org/resource/hkg18/hkg18-411/
Presentation: http://connect.linaro.org.s3.amazonaws.com/hkg18/presentations/hkg18-411.pdf
Video: http://connect.linaro.org.s3.amazonaws.com/hkg18/videos/hkg18-411.mp4
---------------------------------------------------
★ Event Details ★
Linaro Connect Hong Kong 2018 (HKG18)
19-23 March 2018
Regal Airport Hotel Hong Kong
---------------------------------------------------
Keyword: IoT, Embedded
'http://www.linaro.org'
'http://connect.linaro.org'
---------------------------------------------------
Follow us on Social Media
https://www.facebook.com/LinaroOrg
https://www.youtube.com/user/linaroorg?sub_confirmation=1
https://www.linkedin.com/company/1026961
Linux 4.x Tracing: Performance Analysis with bcc/BPFBrendan Gregg
Talk about bcc/eBPF for SCALE15x (2017) by Brendan Gregg. "BPF (Berkeley Packet Filter) has been enhanced in the Linux 4.x series and now powers a large collection of performance analysis and observability tools ready for you to use, included in the bcc (BPF Complier Collection) open source project. BPF nowadays can do system tracing, software defined networks, and kernel fast path: much more than just filtering packets! This talk will focus on the bcc/BPF tools for performance analysis, which make use of other built in Linux capabilities: dynamic tracing (kprobes and uprobes) and static tracing (tracepoints and USDT). There are now bcc tools for measuring latency distributions for file system I/O and run queue latency, printing details of storage device I/O and TCP retransmits, investigating blocked stack traces and memory leaks, and a whole lot more. These lead to performance wins large and small, especially when instrumenting areas that previously had zero visibility. Tracing superpowers have finally arrived, built in to Linux."
BPF of Berkeley Packet Filter mechanism was first introduced in linux in 1997 in version 2.1.75. It has seen a number of extensions of the years. Recently in versions 3.15 - 3.19 it received a major overhaul which drastically expanded it's applicability. This talk will cover how the instruction set looks today and why. It's architecture, capabilities, interface, just-in-time compilers. We will also talk about how it's being used in different areas of the kernel like tracing and networking and future plans.
An Introduction to eBPF (and cBPF). Topics covered include history, implementation, program types & maps. Also gives a brief introduction to XDP and DPDK
Video: https://www.facebook.com/atscaleevents/videos/1693888610884236/ . Talk by Brendan Gregg from Facebook's Performance @Scale: "Linux performance analysis has been the domain of ancient tools and metrics, but that's now changing in the Linux 4.x series. A new tracer is available in the mainline kernel, built from dynamic tracing (kprobes, uprobes) and enhanced BPF (Berkeley Packet Filter), aka, eBPF. It allows us to measure latency distributions for file system I/O and run queue latency, print details of storage device I/O and TCP retransmits, investigate blocked stack traces and memory leaks, and a whole lot more. These lead to performance wins large and small, especially when instrumenting areas that previously had zero visibility. This talk will summarize this new technology and some long-standing issues that it can solve, and how we intend to use it at Netflix."
Kernel Recipes 2019 - No NMI? No Problem! – Implementing Arm64 Pseudo-NMIAnne Nicolas
As the name would suggest, a Non-Maskable Interrupt (NMI) is an interrupt-like feature that is unaffected by the disabling of classic interrupts. In Linux, NMIs are involved in some features such as performance event monitoring, hard-lockup detector, on demand state dumping, etc… Their potential to fire when least expected can fill the most seasoned kernel hackers with dread.
AArch64 (aka arm64 in the Linux tree) does not provide architected NMIs, a consequence being that features benefiting from NMIs see their use limited on AArch64. However, the Arm Generic Interrupt Controller (GIC) supports interrupt prioritization and masking, which, among other things, provides a way to control whether or not a set of interrupts can be signaled to a CPU.
This talk will cover how, using the GIC interrupt priorities, we provide a way to configure some interrupts to behave in an NMI-like manner on AArch64. We’ll discuss the implementation, some of the complications that ensued and also some of the benefits obtained from it.
Julien Thierry
HKG18-411 - Introduction to OpenAMP which is an open source solution for hete...Linaro
Session ID: HKG18-411
Session Name: HKG18-411 - Introduction to OpenAMP which is an open source solution for heterogeneous system orchestration and communication
Speaker: Wendy Liang
Track: IoT, Embedded
★ Session Summary ★
Introduction to OpenAMP which is an open source solution for heterogeneous system orchestration and communication
---------------------------------------------------
★ Resources ★
Event Page: http://connect.linaro.org/resource/hkg18/hkg18-411/
Presentation: http://connect.linaro.org.s3.amazonaws.com/hkg18/presentations/hkg18-411.pdf
Video: http://connect.linaro.org.s3.amazonaws.com/hkg18/videos/hkg18-411.mp4
---------------------------------------------------
★ Event Details ★
Linaro Connect Hong Kong 2018 (HKG18)
19-23 March 2018
Regal Airport Hotel Hong Kong
---------------------------------------------------
Keyword: IoT, Embedded
'http://www.linaro.org'
'http://connect.linaro.org'
---------------------------------------------------
Follow us on Social Media
https://www.facebook.com/LinaroOrg
https://www.youtube.com/user/linaroorg?sub_confirmation=1
https://www.linkedin.com/company/1026961
Linux 4.x Tracing: Performance Analysis with bcc/BPFBrendan Gregg
Talk about bcc/eBPF for SCALE15x (2017) by Brendan Gregg. "BPF (Berkeley Packet Filter) has been enhanced in the Linux 4.x series and now powers a large collection of performance analysis and observability tools ready for you to use, included in the bcc (BPF Complier Collection) open source project. BPF nowadays can do system tracing, software defined networks, and kernel fast path: much more than just filtering packets! This talk will focus on the bcc/BPF tools for performance analysis, which make use of other built in Linux capabilities: dynamic tracing (kprobes and uprobes) and static tracing (tracepoints and USDT). There are now bcc tools for measuring latency distributions for file system I/O and run queue latency, printing details of storage device I/O and TCP retransmits, investigating blocked stack traces and memory leaks, and a whole lot more. These lead to performance wins large and small, especially when instrumenting areas that previously had zero visibility. Tracing superpowers have finally arrived, built in to Linux."
BPF of Berkeley Packet Filter mechanism was first introduced in linux in 1997 in version 2.1.75. It has seen a number of extensions of the years. Recently in versions 3.15 - 3.19 it received a major overhaul which drastically expanded it's applicability. This talk will cover how the instruction set looks today and why. It's architecture, capabilities, interface, just-in-time compilers. We will also talk about how it's being used in different areas of the kernel like tracing and networking and future plans.
Video: https://www.youtube.com/watch?v=FJW8nGV4jxY and https://www.youtube.com/watch?v=zrr2nUln9Kk . Tutorial slides for O'Reilly Velocity SC 2015, by Brendan Gregg.
There are many performance tools nowadays for Linux, but how do they all fit together, and when do we use them? This tutorial explains methodologies for using these tools, and provides a tour of four tool types: observability, benchmarking, tuning, and static tuning. Many tools will be discussed, including top, iostat, tcpdump, sar, perf_events, ftrace, SystemTap, sysdig, and others, as well observability frameworks in the Linux kernel: PMCs, tracepoints, kprobes, and uprobes.
This tutorial is updated and extended on an earlier talk that summarizes the Linux performance tool landscape. The value of this tutorial is not just learning that these tools exist and what they do, but hearing when and how they are used by a performance engineer to solve real world problems — important context that is typically not included in the standard documentation.
Someone deployed their application as a Docker container. Then another someone came along and hacked it. Then everyone starts looking at you asking, "How did this happen?"
This talk goes into how to extract the forensics artifacts of a Docker container, both if it was still running on a live system (easy) and if you must start from a cold disk image (harder).
A cheatsheet of the high points of this talk is also available here: https://www.didactic-security.com/resources/docker-forensics-cheatsheet.pdf
The video of this presentation at BSides RDU 2018 is online here: https://youtu.be/esj_NoTsywU?t=3667
eBPF (extended Berkeley Packet Filters) is a modern kernel technology that can be used to introduce dynamic tracing into a system that wasn't prepared or instrumented in any way. The tracing programs run in the kernel, are guaranteed to never crash or hang your system, and can probe every module and function -- from the kernel to user-space frameworks such as Node and Ruby.
In this workshop, you will experiment with Linux dynamic tracing first-hand. First, you will explore BCC, the BPF Compiler Collection, which is a set of tools and libraries for dynamic tracing. Many of your tracing needs will be answered by BCC, and you will experiment with memory leak analysis, generic function tracing, kernel tracepoints, static tracepoints in user-space programs, and the "baked" tools for file I/O, network, and CPU analysis. You'll be able to choose between working on a set of hands-on labs prepared by the instructors, or trying the tools out on your own test system.
Next, you will hack on some of the bleeding edge tools in the BCC toolkit, and build a couple of simple tools of your own. You'll be able to pick from a curated list of GitHub issues for the BCC project, a set of hands-on labs with known "school solutions", and an open-ended list of problems that need tools for effective analysis. At the end of this workshop, you will be equipped with a toolbox for diagnosing issues in the field, as well as a framework for building your own tools when the generic ones do not suffice.
Video: https://www.youtube.com/watch?v=JRFNIKUROPE . Talk for linux.conf.au 2017 (LCA2017) by Brendan Gregg, about Linux enhanced BPF (eBPF). Abstract:
A world of new capabilities is emerging for the Linux 4.x series, thanks to enhancements that have been included in Linux for to Berkeley Packet Filter (BPF): an in-kernel virtual machine that can execute user space-defined programs. It is finding uses for security auditing and enforcement, enhancing networking (including eXpress Data Path), and performance observability and troubleshooting. Many new open source tools that have been written in the past 12 months for performance analysis that use BPF. Tracing superpowers have finally arrived for Linux!
For its use with tracing, BPF provides the programmable capabilities to the existing tracing frameworks: kprobes, uprobes, and tracepoints. In particular, BPF allows timestamps to be recorded and compared from custom events, allowing latency to be studied in many new places: kernel and application internals. It also allows data to be efficiently summarized in-kernel, including as histograms. This has allowed dozens of new observability tools to be developed so far, including measuring latency distributions for file system I/O and run queue latency, printing details of storage device I/O and TCP retransmits, investigating blocked stack traces and memory leaks, and a whole lot more.
This talk will summarize BPF capabilities and use cases so far, and then focus on its use to enhance Linux tracing, especially with the open source bcc collection. bcc includes BPF versions of old classics, and many new tools, including execsnoop, opensnoop, funcccount, ext4slower, and more (many of which I developed). Perhaps you'd like to develop new tools, or use the existing tools to find performance wins large and small, especially when instrumenting areas that previously had zero visibility. I'll also summarize how we intend to use these new capabilities to enhance systems analysis at Netflix.
From DCIM towards Infrastructure Automation
Netbox is an open-source Data Centre Information Manager, that allows you to restructure your documentation, create automated workflows from this, and feed that back, creating a loop where the source of truth is reinforced. This talk will walk people through what Netbox covers, and how we have built and use it in large and small environments to drive better automation and support outcomes.
A talk about Open Source logging and monitoring tools, using the ELK stack (ElasticSearch, Logstash, Kibana) to aggregate logs, how to track metrics from systems and logs, and how Drupal.org uses the ELK stack to aggregate and process billions of logs a month.
Session ID: HKG18-203
Session Name: HKG18-203 - Overview of Linaro DRM
Speaker: Peter Griffin
Track: Digital Home
★ Session Summary ★
This presentation will provide an overview of the Linaro Digital Rights Management (DRM) integrations with OP-TEE for Linux and Android. Topics covered will include the latest status for ClearKey, Widevine and Playready for supported browsers and boards.
---------------------------------------------------
★ Resources ★
Event Page: http://connect.linaro.org/resource/hkg18/hkg18-203/
Presentation: http://connect.linaro.org.s3.amazonaws.com/hkg18/presentations/hkg18-203.pdf
Video: http://connect.linaro.org.s3.amazonaws.com/hkg18/videos/hkg18-203.mp4
---------------------------------------------------
★ Event Details ★
Linaro Connect Hong Kong 2018 (HKG18)
19-23 March 2018
Regal Airport Hotel Hong Kong
---------------------------------------------------
Keyword: Digital Home
'http://www.linaro.org'
'http://connect.linaro.org'
---------------------------------------------------
Follow us on Social Media
https://www.facebook.com/LinaroOrg
https://www.youtube.com/user/linaroorg?sub_confirmation=1
https://www.linkedin.com/company/1026961
eBPF is an exciting new technology that is poised to transform Linux performance engineering. eBPF enables users to dynamically and programatically trace any kernel or user space code path, safely and efficiently. However, understanding eBPF is not so simple. The goal of this talk is to give audiences a fundamental understanding of eBPF, how it interconnects existing Linux tracing technologies, and provides a powerful aplatform to solve any Linux performance problem.
Open Source IDS Tools: A Beginner's GuideAlienVault
This SlideShare provides an overview of the various Open Source IDS tools available today. Whether you need to monitor hosts or the networks connecting them to identify the latest threats, these are some great open source intrusion detection (IDS) tools available to you.
Dataplane programming with eBPF: architecture and toolsStefano Salsano
eBPF is definitely a complex technology. Developing complex systems based on eBPF is challenging due to the intrinsic limitations of the model and the known shortcomings of the tool chain.
The learning curve of this technology is very steep and needs continuous coaching from experts. This tutorial will investigate:
What is eBPF and why it has gained a prominent position among the solutions to improve the packet processing performance in Linux/x86 nodes. We will shortly present some important use case scenarios for eBPF, like Kubernetes’ Cilium
The architecture of eBPF and its programming toolchain (e.g. bcc
What are the frameworks for eBPF programming, such as Polycube and InKeV.
How to make eBPF programming easier, more flexible and modular with HIKe/eCLAT
How to implement a custom application logic in eBPF with eCLAT using a python-like script
How to extend the framework and develop new modules
Technical challenges (running on different providers (we need an overlay!!)) as well as social challenges (why are we famous in Peru?) during COVID-19 when running an opensource conference system.
The systems is based on Jitsi and run bei Freifunk Munich in Germany.
Video: https://www.youtube.com/watch?v=FJW8nGV4jxY and https://www.youtube.com/watch?v=zrr2nUln9Kk . Tutorial slides for O'Reilly Velocity SC 2015, by Brendan Gregg.
There are many performance tools nowadays for Linux, but how do they all fit together, and when do we use them? This tutorial explains methodologies for using these tools, and provides a tour of four tool types: observability, benchmarking, tuning, and static tuning. Many tools will be discussed, including top, iostat, tcpdump, sar, perf_events, ftrace, SystemTap, sysdig, and others, as well observability frameworks in the Linux kernel: PMCs, tracepoints, kprobes, and uprobes.
This tutorial is updated and extended on an earlier talk that summarizes the Linux performance tool landscape. The value of this tutorial is not just learning that these tools exist and what they do, but hearing when and how they are used by a performance engineer to solve real world problems — important context that is typically not included in the standard documentation.
Someone deployed their application as a Docker container. Then another someone came along and hacked it. Then everyone starts looking at you asking, "How did this happen?"
This talk goes into how to extract the forensics artifacts of a Docker container, both if it was still running on a live system (easy) and if you must start from a cold disk image (harder).
A cheatsheet of the high points of this talk is also available here: https://www.didactic-security.com/resources/docker-forensics-cheatsheet.pdf
The video of this presentation at BSides RDU 2018 is online here: https://youtu.be/esj_NoTsywU?t=3667
eBPF (extended Berkeley Packet Filters) is a modern kernel technology that can be used to introduce dynamic tracing into a system that wasn't prepared or instrumented in any way. The tracing programs run in the kernel, are guaranteed to never crash or hang your system, and can probe every module and function -- from the kernel to user-space frameworks such as Node and Ruby.
In this workshop, you will experiment with Linux dynamic tracing first-hand. First, you will explore BCC, the BPF Compiler Collection, which is a set of tools and libraries for dynamic tracing. Many of your tracing needs will be answered by BCC, and you will experiment with memory leak analysis, generic function tracing, kernel tracepoints, static tracepoints in user-space programs, and the "baked" tools for file I/O, network, and CPU analysis. You'll be able to choose between working on a set of hands-on labs prepared by the instructors, or trying the tools out on your own test system.
Next, you will hack on some of the bleeding edge tools in the BCC toolkit, and build a couple of simple tools of your own. You'll be able to pick from a curated list of GitHub issues for the BCC project, a set of hands-on labs with known "school solutions", and an open-ended list of problems that need tools for effective analysis. At the end of this workshop, you will be equipped with a toolbox for diagnosing issues in the field, as well as a framework for building your own tools when the generic ones do not suffice.
Video: https://www.youtube.com/watch?v=JRFNIKUROPE . Talk for linux.conf.au 2017 (LCA2017) by Brendan Gregg, about Linux enhanced BPF (eBPF). Abstract:
A world of new capabilities is emerging for the Linux 4.x series, thanks to enhancements that have been included in Linux for to Berkeley Packet Filter (BPF): an in-kernel virtual machine that can execute user space-defined programs. It is finding uses for security auditing and enforcement, enhancing networking (including eXpress Data Path), and performance observability and troubleshooting. Many new open source tools that have been written in the past 12 months for performance analysis that use BPF. Tracing superpowers have finally arrived for Linux!
For its use with tracing, BPF provides the programmable capabilities to the existing tracing frameworks: kprobes, uprobes, and tracepoints. In particular, BPF allows timestamps to be recorded and compared from custom events, allowing latency to be studied in many new places: kernel and application internals. It also allows data to be efficiently summarized in-kernel, including as histograms. This has allowed dozens of new observability tools to be developed so far, including measuring latency distributions for file system I/O and run queue latency, printing details of storage device I/O and TCP retransmits, investigating blocked stack traces and memory leaks, and a whole lot more.
This talk will summarize BPF capabilities and use cases so far, and then focus on its use to enhance Linux tracing, especially with the open source bcc collection. bcc includes BPF versions of old classics, and many new tools, including execsnoop, opensnoop, funcccount, ext4slower, and more (many of which I developed). Perhaps you'd like to develop new tools, or use the existing tools to find performance wins large and small, especially when instrumenting areas that previously had zero visibility. I'll also summarize how we intend to use these new capabilities to enhance systems analysis at Netflix.
From DCIM towards Infrastructure Automation
Netbox is an open-source Data Centre Information Manager, that allows you to restructure your documentation, create automated workflows from this, and feed that back, creating a loop where the source of truth is reinforced. This talk will walk people through what Netbox covers, and how we have built and use it in large and small environments to drive better automation and support outcomes.
A talk about Open Source logging and monitoring tools, using the ELK stack (ElasticSearch, Logstash, Kibana) to aggregate logs, how to track metrics from systems and logs, and how Drupal.org uses the ELK stack to aggregate and process billions of logs a month.
Session ID: HKG18-203
Session Name: HKG18-203 - Overview of Linaro DRM
Speaker: Peter Griffin
Track: Digital Home
★ Session Summary ★
This presentation will provide an overview of the Linaro Digital Rights Management (DRM) integrations with OP-TEE for Linux and Android. Topics covered will include the latest status for ClearKey, Widevine and Playready for supported browsers and boards.
---------------------------------------------------
★ Resources ★
Event Page: http://connect.linaro.org/resource/hkg18/hkg18-203/
Presentation: http://connect.linaro.org.s3.amazonaws.com/hkg18/presentations/hkg18-203.pdf
Video: http://connect.linaro.org.s3.amazonaws.com/hkg18/videos/hkg18-203.mp4
---------------------------------------------------
★ Event Details ★
Linaro Connect Hong Kong 2018 (HKG18)
19-23 March 2018
Regal Airport Hotel Hong Kong
---------------------------------------------------
Keyword: Digital Home
'http://www.linaro.org'
'http://connect.linaro.org'
---------------------------------------------------
Follow us on Social Media
https://www.facebook.com/LinaroOrg
https://www.youtube.com/user/linaroorg?sub_confirmation=1
https://www.linkedin.com/company/1026961
eBPF is an exciting new technology that is poised to transform Linux performance engineering. eBPF enables users to dynamically and programatically trace any kernel or user space code path, safely and efficiently. However, understanding eBPF is not so simple. The goal of this talk is to give audiences a fundamental understanding of eBPF, how it interconnects existing Linux tracing technologies, and provides a powerful aplatform to solve any Linux performance problem.
Open Source IDS Tools: A Beginner's GuideAlienVault
This SlideShare provides an overview of the various Open Source IDS tools available today. Whether you need to monitor hosts or the networks connecting them to identify the latest threats, these are some great open source intrusion detection (IDS) tools available to you.
Dataplane programming with eBPF: architecture and toolsStefano Salsano
eBPF is definitely a complex technology. Developing complex systems based on eBPF is challenging due to the intrinsic limitations of the model and the known shortcomings of the tool chain.
The learning curve of this technology is very steep and needs continuous coaching from experts. This tutorial will investigate:
What is eBPF and why it has gained a prominent position among the solutions to improve the packet processing performance in Linux/x86 nodes. We will shortly present some important use case scenarios for eBPF, like Kubernetes’ Cilium
The architecture of eBPF and its programming toolchain (e.g. bcc
What are the frameworks for eBPF programming, such as Polycube and InKeV.
How to make eBPF programming easier, more flexible and modular with HIKe/eCLAT
How to implement a custom application logic in eBPF with eCLAT using a python-like script
How to extend the framework and develop new modules
Technical challenges (running on different providers (we need an overlay!!)) as well as social challenges (why are we famous in Peru?) during COVID-19 when running an opensource conference system.
The systems is based on Jitsi and run bei Freifunk Munich in Germany.
Challenges and experiences with IPTV from a network point of viewbrouer
OpenSource IPTV MPEG2-TS analyzer.
This presentation was given at OpenSourceDays 2010 (and in earlier stages of the project at Bifrost Workshop 2009 and 2010)
Kranky Geek WebRTC 2015 - What's next for WebRTC?Kranky Geek
lways the highlight of this event, Google provides the nitty gritty details on what they are doing to progress WebRTC and their internal developments to help your application succeed. We'll cover more details on the recently announced Alliance for Open Media, an effort to create royalty-free video codecs.
Google Team
My slide at the Milan Codemotion 2015, a session called "An Adventure with ESP8266 and IOT" about using the esp8266 with NodeMCU, mosquitto, nodejs and an accelerometer. All the sourcecode will be available at http://pestohacks.blogspot.com soon
WebRTC gives us a way to do real-time, peer-to-peer communication on the web. In this talk, we'll go over the current state of WebRTC (both the awesome parts and the parts which need to be improved) as well as what could come in the future. Mostly though, we'll take a look at how to combine WebRTC with other web technologies to create great experiences on the front-end for real-time, p2p web apps.
Andrea De Gaetano - An Adventure with ESP8266 firmwares and IOTCodemotion
This talk is about my experience with the esp8266,low cost device, in an iot context. This device is capable of connect to or create a wireless network, with programmable pin. Topics: - introduction to esp8266 hardware and versions - software and hardware requirements - official firmware and the arduino connection - alternative firmwares - the nodemcu project: api and a sample script - share data with mosquitto - a web client to visualize data - sample project/demo: - sending accelerometer data through esp8266 by mosquitto - visualize realtime data on a web browser
NAB2022: Essentials for Media over IP Network DesignKoji Oyama
When you try to build an ST-2110 based network, your first question may be "how should I design a specific Media-over-IP (MoIP) network?". Even if you design according to JT-NM TR-1001-1 guideline, you may still face on a lot of abbreviations about network technology during your detailed design phase, because most of which are what you, a broadcasting engineer, seldom hear so far. Especially it would be a big difference from SDI network design that we have to consider not only structural design for physical cable connections, but also logical and functional connections which are multiplexed bidirectionally in fiber cables.
This presentation provides you a basic design flow and elemental technologies that network engineers should know when they configure network switches on their MoIP networks. The technologies include VLAN, VRF, Multicast routing, IGMP, PIM, OSPF, LAG, and LACP, which are essentials for ST-2110 network but rarely heard in home network design.
I have been designing several MoIP networks by combining these elemental technologies. I also have been proving some trainings on the basics of IP network design for broadcast engineers. So, I would like to introduce realistic design process based on my experience. In addition, I am going to explain some design tips from a lot of my try-and-errors and my failures. The targeted audience is broadcasting engineers who are about to study how to build a MoIP network. I hope this presentation will guide them on what they need to learn to design network design techniques at the beginning.
Using Eclipse and Lua for the Internet of Things - EclipseDay Googleplex 2012Benjamin Cabé
The Internet of Things (IoT) or Machine to Machine (M2M), is a technological field that will radically change the global network by enabling the communication of virtually every single object with each other. Studies state that more than 50 billions objects may be connected to the Internet by 2020. In a near future, everything from a light bulb to a power plant, from a pacemaker to an hospital, from a car to a road network will be part of the Internet.
While this revolution is already happening (your house or your car may be "connected" already!), there are still lots of barriers to its growth, especially since existing solutions are almost always proprietary, and cannot interoperate easily. There are several very active M2M initiatives at Eclipse aiming at lowering these barriers, all under the umbrella of the M2M Industry Working Group. Last year, projects Paho (communication protocols for M2M) and Koneki (tools for M2M developers, in particular a complete IDE for Lua development) were created, and in July 2012 project Mihini was proposed to establish Lua as a reference platform for building M2M and IoT solutions.
The purpose of this talk is to give you a clear understanding of the afore mentioned Eclipse projects, as well as to show you that real M2M solutions can already be developed thanks to them. We will briefly introduce the Lua programming language, explain why it is a good fit for embedded M2M development, and then demonstrate the development of an actual working solution making use of the Mihini framework, a Paho MQTT client, and the Koneki tooling. The use case will also leverages Open Hardware plaforms such as Arduino and Raspberry Pi.
Webinar topic: Troubleshooting Layer 2 Ethernet Problem: Loop, Broadcast, Security
Presenter: Achmad Mardiansyah, M. Taufik Nurhuda
In this webinar series, Troubleshooting Layer 2 Ethernet Problem: Loop, Broadcast, Security
Please share your feedback or webinar ideas here: http://bit.ly/glcfeedback
Check our schedule for future events: https://www.glcnetworks.com/en/schedule/
Follow our social media for updates: Facebook, Instagram, YouTube Channel, and telegram also discord
Recording available on Youtube
https://youtu.be/G4IuMNaJZLY
How we built an open video conferencing service to help people stay connected during corona
You can watch the Youtube Recording here (german):
https://t.co/cg7bGKDOjB?amp=1
Generating a custom Ruby SDK for your web service or Rails API using Smithyg2nightmarescribd
Have you ever wanted a Ruby client API to communicate with your web service? Smithy is a protocol-agnostic language for defining services and SDKs. Smithy Ruby is an implementation of Smithy that generates a Ruby SDK using a Smithy model. In this talk, we will explore Smithy and Smithy Ruby to learn how to generate custom feature-rich SDKs that can communicate with any web service, such as a Rails JSON API.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
2. awlnx
● Annika Wickert
● Senior Network Engineer
● Twitter @awlnx
krombel
● Matthias Kesler
● IT Consultant
● Twitter @kr0mbel
Who are we?
pkoerner
● Peter Körner
● IT since CBM, 2C3, FF 6y,
DL9HCZ, working @Red Hat
● Twitter @pkoerner81929
3. FFMUC?
• Freie Netze München e.V. seit 2014
• Community Freifunk München seit 2004
• No registration of nodes
• Wifi
• #FFMEET
• DoH/DoT/DNSCrypt
4. Jitsi to close the social gap during corona
• An upcoming Freifunk Meeting was about to get canceled because of Corona
• Many people especially schools seemed in need of an easy to use conference
system
• “Freifunk verbindet”
• Christmas 2020
8. Restart of Freie Netze München e.V.
• FNMUC was kinda abandoned
• We need an entity which can sign contracts and
acquire money
• Elections in July
• Since then many new members, many actions,
lots of ideas and high motivation
9. AS212567
• IPv4: 5.1.66.0/24 + 185.150.99.0/24
• IPv6: 2001:678:e68::/48 + 2001:678:ed0::/48
• When we need to switch datacenters we keep the address space
• We can multi-home much easier
• More possible sponsors
• We can join Internet Exchanges! #PeeringFamily
• Abuse handling is done by FNMUC e.V.
10. Preparing the new datacenter
● Pre-Installing everything possible
● Switching to Ubuntu 20.04 from Debian (mostly) stretch
● Run an overlay network for easier cross-site communication (Nebula)
● Much SaltStack code: https://github.com/freifunkMUC/ffmuc-salt-public
14. Use more bandwidth!
• New DC has a bigger uplink
• Users cannot use it, because fastd does not perform very well
• L2TP performs very good but has no encryption
• We experimented with Wireguard before and were very happy with it
15. Wireguard vs fastD
• FastD is a single threaded userspace process
• Wireguard runs in kernel space thus has to be multithreaded
• Wireguard cannot transport Layer2 Protocols - B.A.T.M.A.N. is one ...
• We need another encapsulation which solves this problem => VXLAN
WireguardVXLANB.A.T.M.A.N.
16. Gateways
• Everything is automated with Saltstack
• systemd-networkd takes care of all interfaces
• 800 - 1000 Nodes per Gateway are easy
• We run whole FFMUC on just two gateways
17. We are pioneering much stuff
• There was no systemd-networkd integration for B.A.T.M.A.N.
=> So we wrote it: https://github.com/systemd/systemd/pull/17252
• There was no firmware integration
=> So we wrote it:
https://github.com/freifunk-gluon/community-packages/pull/6
• There was no daemon to accept wireguard keys
=> So we wrote it: https://github.com/freifunkMUC/wgkex
18. How does it work?
• Wireguard Peers on the gateways are created by wgkex
• Allowed IP is derived from the publickey of the node
• VXLAN Forwarding database entry are created by wgkex
20. Debugging … Flamegraphs and Bugs
• Wireguard performs well but we have too much load on our gateways. Why?
21. Community
• Freifunk Darmstadt and Freifunk Regensburg helped a lot during development
of wgkex!
• B.A.T.M.A.N. developers helped a lot during debugging the performance issue
and created many bugfixes
• Everything is opensource and available on Github
https://github.com/freifunkMUC
• More background and all fixes:
https://ffmuc.net/freifunkmuc/2020/12/03/wireguard-firmware/
23. Other Services
• Chat for our Community (and people interested in Jitsi ;) ) https://chat.ffmuc.net
• Public DoH/DoT/DNSCrypt resolver https://doh.ffmuc.net
24. Encrypted DNS
• As we appeared in c’t much growth the last month (link in appendix)
29. We need members and supporters
• We have monthly costs for data centers, IP space etc.
• We have a association called Freie Netze München e.V.
• We only have a few number of admins at the moment
• New ideas christmas presents
https://ffmuc.net/freifunkmuc/2020/12/12/weihnachtsaktion/
=> We need more people! Sign up here:
https://ffmuc.net/wiki/doku.php?id=ev:start
“Das andere
Weihnachts
geschenk!”
