linaro

Posted on by Jean-Luc Aufranc (CNXSoft) - 1 Comment on Linaro Connect HK Greg Kroah-Hartman Keynote: “I Don’t Want Your Code!”

Linaro Connect HK Greg Kroah-Hartman Keynote: “I Don’t Want Your Code!”

If you are a developer interested in getting your code into mainline, Greg KH keynote at Linaro Connect 2013 Hong Kong is probably worth a watch. In this presentation entitled “I Don’t Want Your Code! Linux Kernel Maintainers, why are they so grumpy?”, he first describes the large amount of patches they receive (7.28 patches per hour for kernel 3.8.0), gives some statistic about developers and companies involved with the kernel (about 20% is done by individuals), tells the audience they should submit the kernel code during SoC emulation/simulation stage, so that it’s accepted and ready to use when customers get the silicons (like Intel does), and quotes Intel and IBM executives saying “Working upstream saves time and money”. He then moves on what he does not want to see (and gets a lot): patch series with missing patches, email signature saying it’s confidential (since Linux development is done publicly, […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 2 Comments on Linaro 13.02 Release with Linux Kernel 3.8 and Android 4.2.2

Linaro 13.02 Release with Linux Kernel 3.8 and Android 4.2.2

Linaro 13.02 is now available, and features Linux Kernel 3.8 and Android 4.2.2. The biggest news this month is probably the first release of a preliminary ARM64 Debian/Ubuntu Raring image. Other noticeable items include work on ARMv7 KVM, more improvements to OpenEmbedded ARMv8 implementation, as well as big.LITTLE MP implementation, and some modifications to the toolchain for Cortex A7 support. Origen images are not available for download this month, and there’s still no ALIP images since they have disappeared since Linaro upgraded to Ubuntu Quantal. Here are the highlights of this release: Android AOSP master build for Galaxy Nexus has been setup All the platforms have been updated to 4.2.2 Support for lava-test-shell has been added to linaro-android-build-tools. Developer Platform CI bring up: ARMv7 KVM – Add Arndale hypervisor patch to u-boot-linaro. CI bring up: Arndale – Add Arndale image reports to LAVA, Enable and verify UEFI support in the […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 1 Comment on ARM big.LITTLE Processing Demo (HMP) on ARM TC2 Test Chip

ARM big.LITTLE Processing Demo (HMP) on ARM TC2 Test Chip

Samsung launched Exynos 5 Octa at CES 2013. This processor comes with 8 cores: 4 Cortex A15 cores and 4 Cortex A7 cores, and it’s the first processor that’s been announced to work in big.LITTLE configuration, where the big cores (A15) handle demanding tasks, and the LITTLE cores (A7) handle simpler tasks such as audio playback or background tasks. This is all done to optimize power consumption. There are 2 big.LITTLE software implementations: In-kernel switcher (IKS) and heterogeneous multi-processing (HMP). The first one is easier to implements but can only use 4 cores (in Exynos 5 Octa) at a time, and the second is more complex, but can handle all 8 cores, and assign individual tasks to a particular core. For more technical details about big.LITTLE implementations, you can read my previous post. ARM and Samsung recently uploaded a video providing an overview of big.LITTLE (but instead of IKS and […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on Linaro Connect Asia 2013 Sessions and Mini-Summits

Linaro Connect Asia 2013 Sessions and Mini-Summits

Linaro Connect Asia 2013 (LCA13) will take place in Hong Kong again this year, on March 4 – 8, 2013 at the Gold Coast Hotel. Linaro recently published the event schedule, with sessions focused on kernel, power management, toolchain, graphics and multimedia, platform, validation, and QA tracks, as well as 2 mini-summits: Linaro Enterprise Group (LEG) which will discuss about ARM server, and an as-yet-unannounced group (Linaro Networking Group?) within Linaro. There will also be hacking sessions each day (except on “Demo Friday”) where you can certainly expect to learn many useful skills/tips. I’ve selected 2 sessions or keynotes per day that I think could be especially interesting. Some of the sessions don’t have description yet, so even if they might seem interesting I’ve usually skipped those. Monday 12:00 – 13:00 – Low Level Virtual Machine (LLVM) Update The Toolchain Working Group started working on LLVM in January 2013.  Come […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on linaro-android-tools Scripts Upgrade Android Kernel & Initrd via ADB

linaro-android-tools Scripts Upgrade Android Kernel & Initrd via ADB

With Linaro 13.01 release, Linaro announced linaro-android-tools (aka Kernel Update Tools), a set of tools to improve development time for kernel developers. Today, they published a blog post explaining those scripts allow developers to update the kernel without having to take out the SD card from their development board, and instead update the firmware via ADB with a PC connected via the network or USB. Currently there are 2 shell scripts: update-android.sh – To update kernel files in boot partition such as boot.tar.bz2, single files (e.g. uImage) or kernel modules. Usage:

For example:

update-uInitrd.sh – To update files in the initrd Usage:

For example:

Those 2 scripts are available in Linaro git repository:

Currently the scripts only support Pandaboard, Origen, Versatile Express, and Versatile Express A9 boards,but they could be easily modified to support other boards supporting linaro packages. Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX Software […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 2 Comments on Linaro 13.01 Release with Linux Kernel 3.8 and Android 4.2.1

Linaro 13.01 Release with Linux Kernel 3.8 and Android 4.2.1

Linaro has just announced release 13.01 which includes Linux Kernel 3.8-rc4 and Android 4.2.1. A lot of work seems to have gone in Arndale board and OpenEmbedded ARMv8. It’s the first time an Ubuntu image is released for Arndale Cortex A15 development board. One the kernel side some Android upstreaming work has been done, as well as some fixes for eMMC, and code for ST Ericsson Novathor 8500 SoC has been reorganized. Version 14 of the big.LITTLE MP (Multi Processing) has been released. The LEG has done further work on Linaro UEFI and GRUB. Here are the highlights of this release: Android Platform Work The first step of the android-build front-end update for new build program has been landed. Origen and Versatile Express manifests have been consolidated into a single manifest. linaro-android-tools were developed to improve development time for kernel developers. See Kernel Update Tools for details. The android-build scripts […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 5 Comments on Embedded Linux Conference 2013 Schedule

Embedded Linux Conference 2013 Schedule

The Embedded Linux Conference (ELC 2013) will take place on February 20 – 22, 2013 at Park 55 Hotel in San Francisco, California. ELC consists of 3 days of presentations, tutorials and sessions. There will be over 50 sessions during those 3 days. I’ll highlight a few sessions that I find particularly interesting, and that did not get presented at ELCE 2012 (AFAICR). February 20 11:00 – Anatomy of the arm-soc git tree by Olof Johansson, Google We are now two years into the new maintainer model for ARM platforms, and we have settled down into a workflow that maintainers have adjusted well to. Still, when new platforms arrive, or when maintainer ship changes hands, there’s sometimes a bit of ramp-up in getting used to how we organize our git tree and how we prefer to see code submitted to fit that model. This presentation will give an overview of […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on Are We Headed for a Complexity Apocalypse in Embedded SoCs? – ELCE 2012

Are We Headed for a Complexity Apocalypse in Embedded SoCs? – ELCE 2012

Free-electronics has made nearly 50 videos of Embedded Linux Conference Europe 2012 available at http://free-electrons.com/blog/elce-2012-videos/ in webM format. I’ll upload the ones I find most interesting to Youtube to make them accessible to a larger audience, and post them in this blog together with a short summary, and links to presentation slides when available. I did the same last year, so you can have a look at ELCE 2011 videos if you wish. Some 2012 videos are just an update from 2011. The first video is a keynote by Matt Locke, the Director of the Linux Developer Center at Texas Instruments, about the future of Embedded SoCs. First, he compares the block diagrams of a Power PC chip from 1995 and the latest TI OMAP 15 SoC. In the former, we can see the details of the architecture, but in the latter, we can only see an overview as it has […]

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