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October 30, 2011October 30, 2011 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

Run 2 OS Simultaneously on ARM (OMAP4) with Codezero Embedded Hypervisor

B Labs, a company specializing in ARM Virtualization, was at ARM Techcon 2011 showcasing Codezero, their Embedded Hypervisor to run multiple Linux OS such as Android and Chrome OS on ARM processors. The main purpose of running 2 operating systems is to separate home and enterprise operating systems in mobile devices so that enterprise data is safe. Charbax (ARMDevices.net) interviewed Bahadir Baldan, founder of B Labs, and showed a demo running 2 Android instances and another running Android and Linux in pandaboard. The overhead is 10 to 15% according to B Labs, so the performance hit is minimal. They have already managed to run 4 OS on quad core processors with good performance. They are not able to run Windows operating systems (e.g. Windows Mobile 7.5/ Windows 8) yet, because Cortex A9 processors lack virtualization extensions. This will however be feasible with Cortex A15 processors as binary virtualization will be available. […]

October 29, 2011October 29, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Display Multiplication Table With A Command Line

If you forgot your multiplication table and happen to have a terminal window opened in Linux at the time, here’s the command to use: seq 9 | sed ‘H;g’ | awk -v RS=” ‘{for(i=1;i<=NF;i++)printf(“%dx%d=%d%s”, i, NR, i*NR, i==NR?”\n”:”\t”)}’ Same thing using perl:

perl -e 'print join "\n", map {$a=$_;join "\t",map {$_."x$a=".$a*$_} (1 .. $a) } (1 .. 9)'

1	perl -e 'print join "\n", map {$a=$_;join "\t",map {$_."x$a=".$a*$_} (1 .. $a) } (1 .. 9)'

Here’s the output:

1x1=1
1x2=2	2x2=4
1x3=3	2x3=6	3x3=9
1x4=4	2x4=8	3x4=12	4x4=16
1x5=5	2x5=10	3x5=15	4x5=20	5x5=25
1x6=6	2x6=12	3x6=18	4x6=24	5x6=30	6x6=36
1x7=7	2x7=14	3x7=21	4x7=28	5x7=35	6x7=42	7x7=49
1x8=8	2x8=16	3x8=24	4x8=32	5x8=40	6x8=48	7x8=56	8x8=64
1x9=9	2x9=18	3x9=27	4x9=36	5x9=45	6x9=54	7x9=63	8x9=72	9x9=81

1x1=1

1x2=2 2x2=4

1x3=3 2x3=6 3x3=9

1x4=4 2x4=8 3x4=12 4x4=16

1x5=5 2x5=10 3x5=15 4x5=20 5x5=25

1x6=6 2x6=12 3x6=18 4x6=24 5x6=30 6x6=36

1x7=7 2x7=14 3x7=21 4x7=28 5x7=35 6x7=42 7x7=49

1x8=8 2x8=16 3x8=24 4x8=32 5x8=40 6x8=48 7x8=56 8x8=64

1x9=9 2x9=18 3x9=27 4x9=36 5x9=45 6x9=54 7x9=63 8x9=72 9x9=81

Source (in French): http://www.tux-planet.fr/afficher-les-tables-de-multiplication-en-ligne-de-commande/ Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011. www.cnx-software.com

October 27, 2011 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

Long Term Support Initiative (LTSI) Linux Kernel for Consumer Electronics

The Linux Foundation announced a new project, the Long Term Support Initiative (LTSI), created by the Consumer Electronics Workgroup (CE WG) at Linuxcon Europe 2011 in Prague. LTSI aims at reducing duplication of effort in maintaining separate private industry kernel trees. The LTSI project intends to deliver an annual release of a Linux kernel suitable for supporting the lifespan of consumer electronics products and regular updates of those releases for two to three years. The project is backed by several companies in the consumer electronics industry including Hitachi, LG Electronics, NEC, Panasonic, Qualcomm Atheros, Renesas Electronics Corporation, Samsung Electronics, Sony and Toshiba. LTSI will allow device makers to spend less time doing significant back-porting, bug testing and driver development on their own, which carries substantial cost in terms of time-to-market, as well as development and engineering effort to maintain those custom kernels. In some ways, this is similar to Linaro, […]

October 26, 2011October 26, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Yocto Project Release 1.1 Announced

The Linux foundation announced Yocto Project Release 1.1 today. This release codenamed “Edison” and based on Poky 6.0 is the the second release of the project, one year after it was announced in October 2010 to provide developers with greater consistency in the software and tools they’re using across multiple architectures for embedded Linux development. The Yocto Project reached the following milestones during the last year: Alignment of OpenEmbedded technology and the inclusion of OpenEmbedded representation in the Yocto Project governance structure. The projects share a common core that consists of software build recipes and core Linux components that prevent fragmentation and reinforce the OpenEmbedded methodology as an open standard for embedded Linux build systems. Contribution of tools and technologies such as Cross-prelink, EGLIBC, Pseudo, Shoeleather Lab (for automated testing) and Swabber have been contributed from Intel, Mentor Graphics, MontaVista Software and Wind River. Commercial adoption with examples such as […]

October 25, 2011October 25, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Linux 3.1 Release

Linux Torvalds announced the release of Linux Kernel 3.1 yesterday: As promised, the kernel summit has started, and Linux-3.1 is out. The (small) shortlog of changes since -rc10 are appended, we have mostly some sparc and networking changes, along with some radeon and intel iommu fixes (mostly for largepages and integrated graphics issues). Most people probably will not notice the changes. One big change from -rc10 is that there are tar-balls and patches, so if you aren’t a git user (why?) you can download it now in a traditional format. On of the things to note is that the files are now signed by my gpg key, and it’s the *uncompressed* version that the signature is for. And of course, this means that the merge window for 3.2 is open. I’ll do some merging during the KS, but probably most when I get back home – but you can still […]

October 21, 2011October 21, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Renesas R-Car H1 Automotive SoC

Renesas announced the R-Car H1, their new automotice SoC with 4 Cortex-A9 cores clocked at 1GHz and Imagination Technologies’ SGX-543-MP2 graphics processing unit (GPU) aimed at high-end navigation systems. It also features a Renesas SH-4A high-reliability real-time processing CPU core acting as a multimedia engine (MME) . The R-Car H1 SoC can also powered with Renesas’ IMP-X3 core (optional), a real-time image processing unit that enables developers to implement augmented reality application such as 360-degree camera views (Thanks to up to four independent input camera channels) and sign recognition. Here’s an excerpt of the press release: Renesas Electronics Corporation (TSE: 6723) and its subsidiary, Renesas Mobile Corporation, today announced a new member of the R-Car series of automotive systems-on-chip (SoCs), the R-Car H1, capable of delivering up to 11,650 Dhrystone MIPS (DMIPS), and ideal for the high-end car navigation market. The R-Car H1 SoC offers an innovative architecture where the application […]

October 20, 2011October 20, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Leveraging Android’s Linux Heritage at Android Open 2011

The first Android Open Conference took place about 10 days ago. Karim Yaghmour of OperSys published the presentation slides he used during his Android presentations. See Leveraging Android’s Linux Heritage presentation slides below which explain how to use existing Linux application in Android. Those 15 slides cover the following: Goal Rationale Stack Comparison Roadblocks Where do I start? Coexistence Approaches Unresolved / Uncharted Demo You can also check out the Embedded Android Workshop presentation. Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011. www.cnx-software.com

October 20, 2011October 20, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Embedded Android Workshop at Android Open 2011

The first Android Open Conference took place about 10 days ago. Karim Yaghmour of OperSys published the presentation slides he used during his Android presentations. See Embedded Android Workshop presentation slides below. Those 159 slides cover the following: Android Basics Android History Android Ecosystem Legal Framework for Android Platform and Hardware requirements Development Tools Concepts and Internals: Android Concepts Framework Intro Native Development Overall Architecture System startup Linux Kernel Hardware Support Native User-Space Dalvik JNI System Server Calling on Services Activity Manager Binder Stock AOSP Apps Android Open Source Projects Tools and location Content Building Build system Adding new applications Images Using adb System Server Services run by System Server Observing the System Server Calling on system services Inside a few system services Creating your own system service Hardware Abstraction Layer Android Framework Location and components Android Customization Custom Toolchains and Dev Kits Rationale SDK generation NDK generation Creating a […]