The Android Builders Summit is the second edition of this conference dedicated to Android system development (and not application development). Compared to last year, the conference has been extended to three parallel tracks during two days. There are many talks about Android customization, Android internals, Android porting, usage of Android in specific markets (medical devices, vehicle infotainment), etc. A lot of useful talks for developers working at the Android system level.
The Embedded Linux Conference is now a well-established conference. Again for this 2012 edition, there will be three parallel tracks during three days. There will be talks about many, many topics: performance and optimization, power management, build systems, drivers for various types of devices, multimedia, ARM kernel support and much more.
I will be giving a talk about Buildroot: A Nice, Simple and Efficient Embedded Linux Build System on the second day of the conference. The aim of the talk is to give a status on where Buildroot is, three years after a maintainer was chosen and a big clean up work was started. The project has changed a lot compared to its state three years ago, so I thought it would be nice to make a status on where Buildroot and where it is going.
With my colleagues Grégory Clément and Maxime Ripard, we will also record all the talks from the Embedded Linux Conference in order to put the videos online, freely available, after the conference, as we have done for many past conferences.
We hope to meet you in San Francisco for the Android Builders Summit and the Embedded Linux Conference!
The Embedded Linux Conference 2011 took place between April, 11th and April, 13th in its now usual place, the Kabuki hotel in San Francisco, California. It was the first edition organized since the merge of the CE Linux Forum into the Linux Foundation. During three days, three parallel tracks of talks and BoFs about technical topics around embedded Linux : kernel support, power management, build systems, file systems, real-time, and more.
As usual, part of the Bootlin team was at this Embedded Linux Conference, in order to keep up with the latest developments from the embedded Linux community. Gregory Clement (left on the picture), Maxime Ripard (right on the picture) and myself (center on the picture) were present, and we recorded all talks of the conference. And just a little bit more than one month later, we are ready to announce that all videos are now available online, in 1080p high-definition, and in a lower 450p resolution, encoded with the new VP8 codec.
Amongst all the conferences below, each of us have selected the three ones we thought were the most interesting ones (note that the top three for each us is necessarily composed of distinct talks, as none of us have seen the same talks since we had to record talks from three different sessions in parallel) :
For Gregory Clement, the top three is: Yoshiya Hirase talk about Faster Resume For More Energy Savings on MeeGo, Arnd Bergmann talk about Optimizations For Cheap Flash Media (which follows Arnd article on the same topic in LWN) and a set of three related talks about the video infrastructure in the Linux kernel, that Gregory recommends to watch in this order: Media Controller Framework (MCF) For OMAP2+ Display Subsystem (Sumit Semwal), Video4linux: Progress, New videobuf2 Framework and the Future (Hans Verkuil) and Bringing up HDMI Display for OMAP4 Panda Board – Design, Challenges and Lessons Learned (Mythri pk).
For Maxime Ripard, the top three is: John Stultz talk about Android for servers, Mike Anderson talks about ARM NEON and GPU programming, Wolfram Sang talk about Helping the process
For myself, the top three is: Jesse Barker talks about the ARM Graphics ecosystem which gives a nice overview of the state of this topic, Hai Shalom talk about PCD (which is an original and interesting replacement for init), Dave Stewart talk about The Yocto Project and its Application Development Toolkit (because it gives details on how Yocto is supposed to be used for application development, a topic I’m interested in as a Buildroot developer)
It is also worth noting that this Embedded Linux Conference was co-located with the first edition of the Android Builders Summit, for which we will soon publish videos as well. The next embedded Linux conference will take place in Europe, in Prague from October 26th to 28th, co-located with the first edition of LinuxCon Europe and just after the Kernel Summit. Prague will really be full of Linux developers during this end of October, it’s time to book this week on your agenda as well !
Finally, the list of all videos of Embedded Linux Conference 2011, along with their corresponding slides :
Tim Bird Sony Network Entertainment Welcome Keynote Video (10 minutes): full HD (131M), 450×800 (43M)
Dirk Hohndel, Richard Purdie Intel, Linux Foundation The Yocto Project Video (35 minutes): full HD (458M), 450×800 (140M)
Keshava Munegowda Texas Instruments Power Fail Safe FAT File Systems Slides Video (48 minutes): full HD (693M), 450×800 (203M)
Frank Rowand Sony Identifying embedded real-time issues: I-cache and locks Slides Video (46 minutes): full HD (471M), 450×800 (147M)
Bruno Cardoso Lopes University of Campinas LLVM, Clang and Embedded Linux Systems Slides Video (50 minutes): full HD (593M), 450×800 (164M)
Steven Rostedt RedHat Kernel Shark Tutorial Video (49 minutes): full HD (743M), 450×800 (215M)
Kang Dongwook ETRI Snapshoot Booting on Embedded Linux Slides Video (33 minutes): full HD (284M), 450×800 (95M)
Khem Raj State of OpenEmbedded Internal Toolchain and SDKs Slides Video (41 minutes): full HD (289M), 450×800 (119M)
David Rusling Linaro Linaro: a year of change Slides Video (50 minutes): full HD (529M), 450×800 (173M)
Hai Shalom Atheros Control, recover and debug your embedded product with PCD Slides Video (50 minutes): full HD (470M), 450×800 (160M)
Gene Sally Zigbee Networking and Linux Video (53 minutes): full HD (262M), 450×800 (139M)
Xi Wang Broadcom Solving real-time scheduling problems with RT_PREEMPT and deadline-based scheduler Slides Video (43 minutes): full HD (422M), 450×800 (141M)
Mike Anderson The PTR Group ARM Neon instruction set and why you should care Slides Video (53 minutes): full HD (527M), 450×800 (169M)
Darren Hart Intel Yocto Project: Practical Kernel Development Tutorial Video (52 minutes): full HD (551M), 450×800 (196M)
Arnd Bergmann IBM Optimizations for cheap flash media Slides Video (49 minutes): full HD (482M), 450×800 (160M)
Wolfram Sang Pengutronix Developer’s diary: helping the process Slides Video (39 minutes): full HD (315M), 450×800 (112M)
Thomas Gleixner Linutronix RT-Preempt: what’s the state and why there is no roadmap Slides Video (46 minutes): full HD (447M), 450×800 (149M)
Jason Kridner Texas Instruments High-level web interface to low-level I/O on the BeagleBoard Slides Video (36 minutes): full HD (370M), 450×800 (115M)
Arnd Bergmann IBM Becoming part of the Linux kernel community Slides Video (34 minutes): full HD (376M), 450×800 (126M)
Paul Mundt Renesas Working with hardIRQs: life beyond static IRQ assignments Slides Video (36 minutes): full HD (330M), 450×800 (113M)
Amit Kucheria Linaro Powerdebugging inside Linaro Slides Video (46 minutes): full HD (309M), 450×800 (136M)
Mike Anderson The PTR Group High-performance computing using GPUs Slides Video (57 minutes): full HD (615M), 450×800 (185M)
Paul Larson Canonical Linaro automated validation on ARM Video (51 minutes): full HD (581M), 450×800 (184M)
Dave Stewart Intel The Yocto project and its application development toolkit (ADT) – The answer to effective embedded application development Video (42 minutes): full HD (362M), 450×800 (139M)
Damian Hobson Garcia, Katusya Matsubara, Takanari Hayama, Hisao Munakata Igel Integrating a Hardware Video Codec into Android Stagefright using OpenMAX IL Slides Video (55 minutes): full HD (564M), 450×800 (177M)
Koen Kooi Texas Instruments Integrating OpenEmbedded and Yocto Slides Video (52 minutes): full HD (465M), 450×800 (159M)
Mark Gross Intel How to power tune a device running on a Linux kernel for better suspend battery life Slides Video (49 minutes): full HD (273M), 450×800 (129M)
Remi Lorriaux Adeneo Embedded Real-time audio on embedded devices Slides Video (44 minutes): full HD (437M), 450×800 (138M)
Magnus Damm Runtime PM: upstream I/O device power management Slides Video (53 minutes): full HD (486M), 450×800 (164M)
Jesse Barker Linaro Linux graphics meets the ARM ecosystem Slides Video (50 minutes): full HD (329M), 450×800 (147M)
David Anders Texas Instruments Board bringup: open-source hardware and software tools Slides Video (38 minutes): full HD (376M), 450×800 (118M)
John Williams PetaLogix Dynamic co-simulation of FPGA-based systems on chip Slides Video (57 minutes): full HD (567M), 450×800 (198M)
Summit Semwal Texas Instruments Media Controller Framework (MCF) for OMAP2+ display subsystem Slides Video (49 minutes): full HD (518M), 450×800 (155M)
Anand Gadiyar Texas Instruments Tools and techniques for debugging embedded systems Slides Video (30 minutes): full HD (139M), 450×800 (81M)
Hans Verkuil Cisco Video4linux: progress, new videobuf2 framework and the future Slides Video (56 minutes): full HD (534M), 450×800 (171M)
Yoshiya Hirase Nokia Faster resume for more energy saving on MeeGo Slides Video (58 minutes): full HD (727M), 450×800 (218M)
Jake Edge Linux Weekly News What embedded Linux developers should know about IPv6 Slides Video (46 minutes): full HD (266M), 450×800 (122M)
Grégoire Gentil Always Innovating Hot multi-OS switch: how to run Ubuntu, ChromiumOS, Android at the same time on an embedded device Video (61 minutes): full HD (515M), 450×800 (174M)
Xi Wang Broadcom Controlling memory footpring at all layers: Linux kernel, applications, libraries and toolchain Slides Video (38 minutes): full HD (511M), 450×800 (152M)
Tom Zanussi, Saul Wold Building custom embedded images with Yocto Slides Video (49 minutes): full HD (500M), 450×800 (173M)
Philip Balister Open SDR A high performance interface between the OMAP3 and a FPGA Slides Video (51 minutes): full HD (347M), 450×800 (149M)
Jean Pihet NewOldBits.com The evolution of tracing and profiling for power management and accelerators Slides Video (40 minutes): full HD (428M), 450×800 (133M)
Elizabeth Flanagan Intel Delivering predictability: the Yocto project autobuilder, automated sanity testing, license collection and build statistics tracking Slides Video (48 minutes): full HD (241M), 450×800 (133M)
Mythri pk Texas Instruments Bringing up HDMI display for OMAP4 Panda board: design, challenges and lessons learned Slides Video (40 minutes): full HD (363M), 450×800 (122M)
The program of the Embedded Linux Conference has been announced recently, and as usual, features a wide set of technical embedded Linux talks:
Filesystem/storage: Power Fail Safe FAT File System, Optimizations For Cheap Flash Media, from Arnd Bergmann, who has also recently published a very interesting article on the same topic.
Power management: Faster Resume For More Energy Savings on MeeGo, Powerdebug(ging): A Linaro Perspective, How to Power Tune a Device Running on a Linux Kernel for Better Suspend Battery Life, The Evolution of Tracing and Profiling for Power Management and Accelerators, Runtime PM: Upstream I/O Device Power Management
Real-time: Solving Real-Time Scheduling Problems with RT_PREEMPT and Deadline-Based Scheduler, Real-time Audio on Embedded Devices, Identifying Embedded Real-Time Latency Issues: I-Cache and Locks
Build system, with a huge number of Yocto-related talks, but no other build systems represented: State of OpenEmbedded Internal Toolchain and SDKs, Yocto Project: Practical Kernel Development Tutorial, Building Custom Embedded Images with Yocto, The Yocto Project and its Application Development Toolkit (ADT) – The Answer to Effective Embedded Application Development, Yocto Project Community BoFs, Delivering Predictability: The Yocto Project Autobuilder, Automated Sanity Testing, License Collection, and Build Statistics Tracking
FPGA: Dynamic Co-simulation of FPGA-based Linux Systems-on-Chip, A High Performance Interface Between the OMAP3 and an FPGA
Networking: What Embedded Linux Developers Should Know About IPv6, Zigbee Networking & Linux
Debugging: Kernel Shark Tutorial and Tools and Techniques for Debugging Embedded Systems
Optimization: Snapshot Booting on Embedded Linux, ARM Neon Instruction Set and Why You Should Care, Controlling Memory Footprint at All Layers: Linux Kernel, Applications, Libraries and Toolchain, High-Performance Computing using GPUs, What Are and How to Find a Program’s Unused DSOs
Low-level: Board Bringup: Open Source Hardware and Software Tools, Working with HardIRQs: Life Beyond Static IRQ Assignments, Genie in the Bottle: Linux Drivers for the AM1808 PRU
And many other talks on various topics: LLVM, Clang and Embedded Linux Systems, Linaro: A Year of Change, Control, Recover and Debug Your Embedded Product with PCD, Developer’s Diary: Helping the Process, High-Level Web Interface to Low-Level Linux I/O on the Beagleboard, Linaro Automated Validation on ARM, Crowd Sourcing and Protecting the Open Source Community, Android for Servers?, Hot Multi-OS Switch: How to run Ubuntu, ChromiumOS, Android at the Same Time on an Embedded Device.
This edition will be the first one organized since the merge between the CE Linux Forum into the Linux Foundation, and will therefore be a great opportunity to see if this merge had any impact on the technical quality of the conference.
My colleagues Maxime Ripard (who joined Bootlin just a week ago) and Gregory Clement as well as myself will be present at the Embedded Linux Conference and the Android Builders Summit, and we will as usual record all talks of both of these conferences and will put them online, as we have done recently for the talks that took place during the Embedded Linux Conference Europe 2010 in Cambridge. Do not hesitate to meet us in San Francisco!
Videos from the Embedded Linux Conference in San Francisco, April 12-14, 2010.
The 2010 edition of the Embedded Linux Conference was once again a very interesting event. For embedded Linux developers, the Embedded Linux Conference is a perfect place to learn about new technologies, profit from the experience of other developers, and to meet key software developers.
For people who couldn’t attend this conference, and for single core people who didn’t manage to attend two or three talks at the same time, here are the videos that we managed to shoot. As usual, the videos are released with a Creative Commons Attribution – ShareAlike 3.0 license.
Welcome speech, by Tim Bird (CE Linux Forum) HD video (12 minutes, 128M)
We hope it makes you feel like joining the next edition of the conference. If you can’t wait, what about going to ELC Europe in Cambridge (UK) in late October? It has a very interesting program too. Of course, the sessions will also be recorded. I hope to see you there!
If you have never been to an Embedded Linux Conference yet, these videos should show you how useful this conference is for embedded Linux system developers. This is the place where you can discover new development tools and technologies that will change your working life, benefit from the experience from your peers, get the opportunity to talk to the fantastic people who implement the Free and Open Source software that makes your system run, and win cool penguin goodies. So, don’t miss next next edition in San Francisco.
Welcome speech, by Ruud Derwig (NXP) HD video (11 minutes, 62M)
A set of real-time related talks: Real-Time Linux Failure, by Frank Rowand (works for Sony, well known for his preempt-rt related talks at various ELC conferences), Effective Use of RT-Preempt, by Kevin Dankwardt, Using Interrupt Threads to Prioritize Interrupts, by Mike Anderson (also well known for his very interactive talks, he will also be giving his traditional Using JTAG to debug Linux device drivers tutorial), Measuring Responsiveness of Linux Kernel on Embedded System, by YungJoon Jung and DongHyouk Lim.
A talk by Grant Likely about Flattened Device Tree ARM support update, an effort to convert the ARM architecture to the same organization used in PowerPC, with a device tree file describing the hardware details instead of platform_device definitions in plain C. An important change for anyone doing ARM kernel development.
Several power-management related talks: Runtime Power Management: Overview and Platform Implementation, by Kevin Hillman (who works for Deep Root Systems and has done a huge amount of work in the OMAP power management area). Runtime Power Management is probably the most important change done recently to the power management infrastructure of the Linux kernel, so this talk is certainly worth a look, all the more as Kevin is a very good speaker. On power manegement, there will also be other talks : DVFS for the Embedded Linux, by Yong Bon Koo and Youngbin Seo, Wake-ups effect on idle power for Intel’s Moorestown MID and smartphone platform, by German Monroy (Intel), Workload based aggressive Power Management on the Intel Moorestown MID and future Intel MID/Smartphone Platforms, by Sujith Thomas (from Intel).
The usual tracing-related talks, with Using the LTTng tracer for system-wide performance analysis and debugging by Mathieu Desnoyers and Ftrace – embedded edition, by Steven Rostedt. A talk on debugging Linux toolchain overview with advanced debugging and tracing features, by Dominique Toupin.
Talks about platforms: a keynote by Greg Kroah Hartmann on Android: a case study of an embedded Linux project (during which Greg will probably explain why the Android kernel modifications are not mainlined), Experiences in Android Porting, Lessons learned, tips and tricks, by Mark Gross and Understanding and Developing Applications for the Maemo Platform, by Leandro Melo de Sales, even though the recent merge of Maemo and Moblin to create MeeGo is likely to change some technical aspects of application development for this platform.
The question of multi-core now also seems to be present in embedded conferences: Strategies for Migrating Uniprocessor Code to Multi-Core, by Mike Anderson, Embedded Multi-core with Adeos, Dan Malek, Lock-free algorithm for Multi-core architecture, Hiromasa Kanda. Multi-core Scheduling optimizations for soft real-time multi-threaded applications – A cooperation aware approach, Lucas Martins De Marchi.
Some security talks, with Mike Anderson (again !) talking about Creating a Secure Router Using SELinux and Jake Edge about Understanding threat models for embedded devices
Some more-or-less multimedia-oriented talks: Supporting SoC video subsystems in video4linux, by Hans Verkuil, An Introduction to the Qt Development Framework, by Jeremy Katz, GeeXboX Enna: embedded Media Center, by Benjamin Zores, Case Study – Embedded Linux in a digital television STB, by Melanie Rhianna Lewis
In the other talks, I’ve noted the Small Business Owners BOF by Grant Likely, Evaluation of Data Reliability on Linux File Systems by Yoshitake Kobayashi, Porting the Linux Kernel to x86 MID platforms, by Jacob Pan, Linux without a bootloader? by Greg Ungerer, Kexec – Ready for Embedded Linux by Magnus Damn, Custom hardware modeling for FPGAs and Embedded Linux Platforms with QEMU, by John Williams, Edgar Iglesias.
Both Michael Opdenacker and I will be there at ELC. We hope to meet you during this conference!
As usual, we won’t miss this year’s edition of the Embedded Linux Conference Europe, which has always been a great source of information and encounters for embedded Linux developers.
Here are details about our involvement this year.
I am part of the organization committee, in particular the coordinator for the Technical Showcase.
Taking advantage of his stay in Grenoble, my colleague Thomas Petazzoni will make an embedded Linux presentation on Tuesday, Oct. 13 at 7:30 pm, at GUILDE, the local Linux user group.
Thomas and I will be present at the Embedded Systems Exhibition on Wednesday, Oct. 14, sharing a booth with our partner CALAO Systems. The exhibition entry is free of charge, and this will be an excellent opportunity to meet us and have enough time to talk about your topics of interest.
Thomas will lead the Buildroot BOF with Peter Korsgaard, Buildroot’s maintainer, at 5:35 pm on Thursday, Oct. 15. This informal session will allow users and developers to meet and exchange ideas.
I will be the leader of the Small Business BOF on Thursday 15 at 6:35 pm, an informal session for small embedded Linux companies interested in sharing experience and best practices, and of course to know each other better.
Albin Tonnerre, who was an intern at Bootlin this summer, will participate to the Technical Showcase at 12:00 am on Friday, Oct. 16, showing the benefits of LZO decompression on kernel boot time. During his internship, Albin made very nice contributions to boot time reduction, power management on AT91 and to U-boot board support.
Thomas Petazzoni will also participate to the Technical Showcase at the same time, showing Buidroot’s new features.
We will videotape the conferences we go to and will release the videos later on our website.
Thomas organizes a Buildroot developer day on Saturday, Oct. 17, allowing developers to meet and code together. Bootlin will offer lunch to the participants, and the room will be offered by CALAO Systems. There are no more seats left for space reasons.
Because of my involvement in Buildroot, I’m particularly interested in the numerous talks about embedded Linux build systems: Florian Fainelli will talk about OpenWRT (which is not only dedicated to Wifi routers, but is a generic embedded Linux build system, built as a fork of Buildroot), Gordon Hecker on e2factory (a build system I’ve never heard of until now, but conferences are great to discover new tools and projects), Cedric Hombourger on OpenEmbedded (I will be particularly happy to meet Cedric again since I had the chance to work with him six years ago), Marcin Jusziewicz on OpenEmbedded again, Robert Schwebel on PTXdist and finally Alex de Vries on what seems to be a more generic talk about build systems.
Of course, besides build systems, a lot of other topics will be covered. I’ve noted things such as the talk on Canola by Gustavo Barbieri, the boot time presentation by Grégory Clément, the device tree talks by Wolfram Sang and Vitaly Wool, the talk by Alessandro Rubini in order to meet one of the author of Linux Device Drivers, the power management and clock management talks also.
Bootlin will obviously be present during this conference :
My Colleague Thomas and I had the privilege to participate to the 2009 edition of the Embedded Linux Conference, which took place in San Francisco, on April 6-8. In spite of the weak economy, this event was once again a success. It attracted major developers from the embedded Linux community, as well as participants from all over the word.
Following the tradition, we are proud to release new videos about this event. These videos were shot by Satoru Ueda and Tim Bird (Sony), and by Thomas Petazzoni and Michael Opdenacker (Bootlin). For the first time, we used an HD camcorder to shoot some of the videos. A higher resolution allows to read the slides projected on the screen. As usual, the videos are released with a Creative Commons Attribution – ShareAlike 3.0 license.
Thomas and I found the following talks particularly interesting:
Ubiquitous Linux, by Dirk Hohndel
Embedded Linux and Mainline Kernel, by David Woodhouse
What are Interrupt Threads and How Do They Work?, by Reece Pollack
Visualizing Process Memory, by Matt Mackall
KProbes and Systemtap Status, by Tim Bird
Deploying LTTng on Exotic Embedded Architectures, by Mathieu Desnoyers
Embedded Linux on FPGAs for fun and profit, by Dr John Williams (Petalogix)
Linux on Embedded PowerPC porting guide, by Grant Likely
Understanding and writing an LLVM Compiler Backend, by Bruno Cardoso Lopes
You may be interested in watching the presentations we made and the BOFs we led:
Building Embedded Linux Systems with Buildroot, by Thomas Petazzoni. In these last months, Thomas has made big contributions to this build system.
Build tools BOF, by Thomas Petazzoni
Update on filesystems for flash storage, by Michael Opdenacker
System Size BOF, by Michael Opdenacker
Of course, lots of other talks were very interesting. See the whole list by yourself:
Just a quick note after the announcement that has just been made at the Embedded Linux Conference (ELC) in San Francisco…
Tim Bird has just announced that the next European edition of ELC will be in Grenoble, France, on October 15-16. As the new conference home page says, it will be colocated with ESWEEK.
We are very excited about this news, as Grenoble is a not only a beautiful place, but also a very dynamic city full of universities and high-tech companies. We will do our best to incite people to attend the conference, and of course to speak about their projects and propose demos.